[docs](trx-rs): settle the logbook's remaining questions

The clock is the server's, as asked: it is the machine at the radio, where
the browser may be a phone in another timezone with a clock nobody checked.
When the two disagree by more than a second the panel says so, rather than
logging a time the operator did not expect.

The rest, decided against how logging is actually done:

One station log, not one per rig.  DXCC, WAS and LoTW count the callsign, not
the radio, and a station worked on the second rig is still worked.  The rig
goes on the QSO as MY_RIG.  Station location does follow the rig, though —
these rigs can be in different places, so MY_GRIDSQUARE comes from the one
that made the contact, which is what LoTW's station locations expect too.

The operator is a per-QSO field set once per session.  ADIF separates the
callsign used on the air from the person at the key, and multi-operator
stations rotate people through one station callsign.  It defaults from the
configured callsign, so a single operator never touches it.  It cannot come
from the session: the auth roles are control and rx, with nobody's name on
them.

The log file is configurable, defaulting to the user's data directory.
Bookmarks sit in the config directory because they are settings and decode
logs in the cache directory because they are disposable; a QSO log is
irreplaceable, and cache directories get swept.

Import collisions match on callsign, band, mode and a two-minute window.
Loggers rarely agree to the second on the same QSO — one stamps the contact,
the other the entry — so an exact-minute key duplicates half of what it is
asked to merge.  Two minutes absorbs that without swallowing a legitimate
re-work, since contest rules forbid a second contact on the same band and
mode.  Times compare as instants so midnight matches, and modes are
normalised or an imported SSB would miss our USB.

That normalisation is now written down: a rig mode is not an ADIF mode.  DIG
is the one the rig cannot answer — a rig in DIG is in FT8 or FT4 depending on
what is decoding — and WSPR never opens an entry at all, because hearing a
beacon is not a contact.

Refs #54

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SyX26FCpMQxiBoC7r5K1A7
Signed-off-by: Stan Grams <sjg@haxx.space>

Cargo.lock

@@ -3165,6 +3165,7 @@ dependencies = [
 name = "trx-core"
 version = "0.1.0"
 dependencies = [
+ "base64",
  "flate2",
  "reqwest",
  "serde",

docs/Planned-Features.md

@@ -322,3 +322,255 @@ trx-configurator
 | `trx-app` | Config types and validation | Yes |
 | `serialport` | Serial port enumeration | Yes (transitive) |
 | `soapysdr` | SDR device enumeration (optional) | Yes (feature-gated) |
+
+---
+
+## Logbook and Ham Radio Layout
+
+Two halves of one feature ([#54](https://git.haxx.space/sjg/trx-rs/issues/54)): a station
+logbook in a panel of its own, and an operator layout that puts a transceiver's controls
+around it.
+
+Nothing in the application records a QSO today. The map's "QSO summary" cards describe
+contacts *between other stations*, reconstructed from decoded traffic; bookmarks are
+frequencies, not contacts. Neither is the operator's own log.
+
+### Requirements
+
+| ID | Description |
+|----|-------------|
+| REQ-LOG-001 | The system shall record QSOs the operator makes, each holding at minimum callsign, date, time, band, frequency, mode and both signal reports. |
+| REQ-LOG-002 | When starting a log entry, the system shall pre-fill exactly six fields: frequency, mode, rig name, time, callsign and locator. |
+| REQ-LOG-003 | The system shall leave every other field of a log entry empty for the operator to fill. |
+| REQ-LOG-004 | The system shall allow a logged QSO to be edited and deleted. |
+| REQ-LOG-005 | The system shall survive a crash without losing a QSO that was recorded before it. |
+| REQ-LOG-006 | The system shall list, search and filter the log by callsign, band, mode and date range. |
+| REQ-LOG-007 | Where a decoded station is on screen, the system shall offer to start a log entry from it, pre-filled, without logging it unattended. |
+| REQ-LOG-008 | The system shall show whether a callsign has been worked before, and on which bands. |
+| REQ-FMT-001 | The system shall export the log as an ADIF 3.1.x `.adi` file. |
+| REQ-FMT-002 | The system shall import ADIF `.adi` files produced by other logging software, preserving fields it does not itself use. |
+| REQ-FMT-003 | When importing, the system shall identify QSOs already held and shall not duplicate them. |
+| REQ-FMT-004 | The system shall export a filtered selection of the log as a Cabrillo 3.0 file for contest submission. |
+| REQ-LOG-009 | The system shall stamp QSO times from the server's clock in UTC, and shall tell the operator when the browser's clock disagrees with it by more than one second. |
+| REQ-LAY-001 | The system shall present the logbook in a panel of its own, reachable whatever layout is selected. |
+| REQ-LAY-002 | The system shall offer a "Ham radio" operator layout presenting the transceiver controls and that panel together. |
+| REQ-LAY-003 | Where the selected rig cannot transmit, the system shall not offer the ham layout. |
+
+### A decode is not a QSO
+
+The decoders are receive-only: FT8, CW, APRS and the rest report what was *heard*. A heard
+callsign is the beginning of a log entry, not a contact, and the logbook must never write one
+by itself — REQ-LOG-007 says offer and pre-fill, never auto-log. Digital QSOs made in
+WSJT-X or similar arrive the way every other logger takes them: through ADIF import.
+
+### What is pre-filled, and what is not
+
+Six fields, and no more (REQ-LOG-002, REQ-LOG-003):
+
+| Field | From | ADIF |
+|-------|------|------|
+| Frequency | the selected rig's dial | `FREQ`, with `BAND` derived from it |
+| Mode | the selected rig | `MODE`, and `SUBMODE` where the mode implies one |
+| Rig name | the rig's display name | `MY_RIG` |
+| Time | the server's clock, UTC, when the entry opens | `QSO_DATE`, `TIME_ON` |
+| Callsign | the decode row or map station the entry was started from, else empty | `CALL` |
+| Locator | that station's grid, where the decode carried one, else empty | `GRIDSQUARE` |
+
+Signal reports, power, name, QTH and the rest stay empty. A report in particular is the
+operator's to give: an FT8 SNR is not what was sent, and pre-filling one would put a number in
+the log that nobody exchanged.
+
+The station's own callsign and locator are not pre-filled per entry either — they are station
+identity, taken from configuration when the QSO is written (`STATION_CALLSIGN`, `OPERATOR`,
+`MY_GRIDSQUARE`), and shown once at the top of the panel rather than typed into every row.
+
+### Architecture
+
+#### New crate: `trx-logbook`
+
+```
+src/trx-client/
+  trx-logbook/
+    src/
+      lib.rs        # LogbookHandle: open, add, edit, delete, query, import, export
+      qso.rs        # Qso: the record, its ADIF field mapping, band/mode helpers
+      adif.rs       # ADI reader and writer (pure Rust, no new dependencies)
+      store.rs      # Append-only JSON Lines file, in-memory index, compaction
+      dedupe.rs     # Worked-before and import-collision rules
+```
+
+A library crate under `src/trx-client/`, beside `trx-frontend`, consumed by
+`trx-frontend-http`. The log belongs to the station rather than to a rig or a frontend, so it
+sits where any frontend can reach it.
+
+#### Storage: append-only, not a rewritten blob
+
+Bookmarks use `PickleDb` with `AutoDump`, which rewrites the whole file on every write. That
+is right for a few dozen bookmarks and wrong for a log: a station with 40 000 QSOs would
+rewrite several megabytes to log one contact, and lose the lot if the power went during the
+dump.
+
+The log is instead a JSON Lines file — the shape `trx-decode-log` already uses — appended one
+record per write and read into an in-memory index at startup. An edit or a delete appends a new revision of that record's id; the load
+keeps the last one, and a compaction pass rewrites the file when superseded records exceed a
+threshold. Appending is O(1) and atomic per line, so a crash costs at most the line being
+written.
+
+#### Two formats, for the two things a log is asked for
+
+The file formats were left open ("pick a well-known ham format"), so: **ADIF for interchange,
+Cabrillo for contest submission.** Both are implemented in-repo, in the way this project
+already implements its decoders, and neither adds a dependency.
+
+**ADIF has to stay.** It is not one option among several — it is the only thing the ecosystem
+reads. LoTW, eQSL, Club Log, QRZ.com and every other logger take ADIF and nothing else, so a
+log that cannot write `.adi` cannot be uploaded, confirmed, or moved to another program. That
+is a one-way door, and the interoperability is most of the point of keeping a log at all.
+Nothing on disk is ADI regardless: the store is JSON Lines, and ADIF is what comes out of an
+export.
+
+ADI is a tagged text format — `<FIELD:length>value`, records ended by `<EOR>`, a header ended
+by `<EOH>`, everything outside a tag ignored — small enough to implement exactly. The reader
+must be lenient in the ways real files are irregular (lowercase tags, CRLF, missing header,
+unknown fields, type indicators) and the writer strict. Unknown fields are carried through
+import to export unchanged, so a round trip through trx-rs does not quietly strip what another
+logger wrote. ADX, the XML serialisation of the same data model, is out of scope: it is part
+of the standard but almost nothing reads it.
+
+**Cabrillo is the second format, because ADIF cannot do its job.** Contest logs are submitted
+to sponsors in Cabrillo 3.0 and are rejected in anything else — a header of `CALLSIGN:`,
+`CONTEST:`, `CATEGORY-*` and `CLAIMED-SCORE:` lines, then one fixed-column `QSO:` line per
+contact carrying frequency in kHz, a mode code (`CW`, `PH`, `FM`, `RY`, `DG`), the UTC date and
+time, and both stations' calls, reports and exchanges. It is export-only and drops everything
+outside the contest's exchange, which is why it complements ADIF rather than replacing it.
+It arrives with the contest exchange fields in phase 5, since without a serial or a zone to
+put in the exchange there is nothing for it to write.
+
+#### Integration points
+
+| Source | What it gives the log | How |
+|--------|----------------------|-----|
+| `RigState` | `FREQ`, `BAND`, `MODE`/`SUBMODE`, and the rig id a QSO was made on | watch channel already in the frontend context |
+| Client config `general.callsign` | `STATION_CALLSIGN`, and the default `OPERATOR` | already surfaced as `owner_callsign` in frontend meta |
+| The QSO's own rig, and its position | `MY_GRIDSQUARE` | per-rig latitude and longitude already carried in the rig list |
+| Server clock | `QSO_DATE`, `TIME_ON` in UTC | new `GET /logbook/now`, which also feeds the browser-clock check |
+| Decoder panels and map | a pre-filled entry: callsign, grid, and the report to offer | existing decode history; no new plumbing |
+| `bandForHz` | `BAND` from a frequency | exists in `map-core.ts`; move to a shared module |
+
+#### HTTP API
+
+| Method | Path | Purpose |
+|--------|------|---------|
+| `GET` | `/logbook` | Query: filters, paging |
+| `POST` | `/logbook` | Add a QSO |
+| `PUT` | `/logbook/{id}` | Edit |
+| `DELETE` | `/logbook/{id}` | Delete |
+| `GET` | `/logbook/export.adi` | ADIF export, honouring the current filter |
+| `GET` | `/logbook/export.cbr` | Cabrillo export of a contest selection |
+| `POST` | `/logbook/import` | Import, answering with counts: added, duplicate, rejected |
+| `GET` | `/logbook/worked/{call}` | Worked-before: bands and modes |
+| `GET` | `/logbook/now` | The server's UTC clock, for stamping entries and checking the browser's |
+
+Writes require the control role, as the rig endpoints do.
+
+### Frontend
+
+The logbook is **its own panel**, not a strip bolted to the radio page: a `logbook` entry in
+the tab order beside Bookmarks, holding the entry form, the table with the filters of
+REQ-LOG-006, and import and export. It stands on its own in every layout, so a log can be kept
+without adopting the ham layout, and read while another layout is selected (REQ-LAY-001).
+
+The panel is three parts: the station line at the top (own callsign, locator, the rig a QSO
+would be logged against), the entry form beneath it opening with the six pre-filled fields,
+and the log itself under that, filtered as REQ-LOG-006 asks. Worked-before shows against
+the callsign as it is typed.
+
+The **ham layout** is a fifth entry in the operator layouts (`compact`, `broadcast`, `digital`,
+`full`), which already gate on capability, seed the disclosure sections and persist per rig:
+
+```ts
+ham: {
+  label: "Ham radio",
+  unavailable: "Ham radio needs a rig that can transmit",
+  advanced: true, audio: true, scheduler: false,
+  preferredTab: "logbook", capability: "ham",
+}
+```
+
+with the `ham` capability set from `RigCapabilities.tx`. It keeps frequency, VFO, mode, filter,
+PTT, power and the meters, and hides the broadcast furniture. What it adds over `full` is where
+it starts: the logbook panel, with the radio controls a keystroke away rather than the other
+way round — the layout an operator working the bands wants, where logging the contact is the
+task and the rig is the instrument.
+
+### Phases
+
+| Phase | Lands |
+|-------|-------|
+| 1 | `trx-logbook`: `Qso`, the ADI reader and writer, round-trip tests against files from other loggers |
+| 2 | Store, dedupe, and the HTTP API behind the control role |
+| 3 | Logbook tab: entry, table, filters, import, export |
+| 4 | Ham layout, pre-filled entry from a decode row or the map, worked-before |
+| 5 | Contest exchange fields and Cabrillo export; QSL and LoTW/eQSL fields; per-band worked/confirmed statistics |
+
+### Decisions
+
+**One station log, not one per rig.** Awards and uploads are per station callsign — DXCC, WAS
+and LoTW all count the callsign, not the radio — and a station worked on the second rig is
+still worked. The rig is recorded on the QSO (`MY_RIG`) rather than dividing the log by it.
+The station *location* fields do follow the rig, though: trx-rs rigs can be in different
+places, so `MY_GRIDSQUARE` is taken from the rig that made the QSO rather than from one global
+setting, which is also what LoTW's station locations expect.
+
+**The operator is a per-QSO field, set once per session.** ADIF separates `STATION_CALLSIGN`
+(the call used on the air) from `OPERATOR` (the person at the key); multi-operator stations
+rotate operators through one station callsign, which is why contest loggers record it per QSO.
+It is stored per QSO, defaulted from the configured callsign so a single operator never touches
+it, and changed on the station line at the top of the panel where it sticks for the session.
+It cannot be taken from the session's identity: the auth roles are `control` and `rx`, with no
+notion of who is logged in.
+
+**Server clock, and the log says so.** The server is the machine at the radio; the browser may
+be on a phone in another timezone with a clock nobody has checked. QSO times are UTC from the
+server, and when a browser's clock disagrees by more than a second the panel says so rather
+than silently logging a time the operator did not expect.
+
+**The log file is configurable, and defaults to the user's data directory.** Bookmarks live in
+the config directory because they are settings; decode logs live in the cache directory because
+they are disposable. A QSO log is neither — it is irreplaceable, and cache directories are
+swept by cleaners. `[logbook].path` in the client config, defaulting to
+`dirs::data_dir()/trx-rs/logbook.jsonl`, so a station that keeps its log on a synced or
+backed-up volume can say so.
+
+**Import collisions: callsign, band, mode and a two-minute window.** Two loggers rarely agree
+to the second on the same QSO — one records the time the contact started, another the time it
+was entered — so an exact-minute key duplicates half of what it is asked to merge. Two minutes
+absorbs that. It does not swallow legitimate re-works: contest rules forbid a second contact
+with the same station on the same band and mode, so a repeat inside two minutes is the same
+QSO. Times are compared as instants rather than date and time strings, so a QSO either side of
+midnight matches. Modes are normalised before comparison, or a log that stored `SSB` would fail
+to match ours that stored `USB`.
+
+### Rig modes to ADIF modes
+
+The rig reports what it is demodulating; ADIF wants what the contact was made on, which is not
+always the same word:
+
+| Rig mode | ADIF `MODE` | ADIF `SUBMODE` |
+|----------|-------------|----------------|
+| `USB`, `LSB` | `SSB` | `USB` / `LSB` |
+| `CW`, `CWR` | `CW` | — |
+| `AM`, `SAM` | `AM` | — |
+| `FM`, `WFM` | `FM` | — |
+| `PKT` | `PKT` | — |
+| `DIG` | decided by the decoder in use, not by the rig | |
+| `AIS`, `VDES` | none — not amateur modes, and these rigs do not log | |
+| `Other(..)` | passed through when it names an ADIF mode, else left for the operator | |
+
+`DIG` is the one that cannot come from the rig: a rig in `DIG` is in FT8, FT4 or something else
+depending on which decoder is running, and an entry started from an FT8 row logs `FT8` rather
+than the rig's word for it. WSPR never opens an entry at all — it is a beacon mode, and hearing
+a beacon is not a contact.
+
+The table is data in `qso.rs`, checked against the ADIF enumeration when it is written, with
+anything unrecognised left to the operator rather than guessed into the log.

docs/User-Manual.md

@@ -153,6 +153,13 @@ When audio is enabled, at least one of `rx_enabled` or `tx_enabled` must be true
 | `sample_rate` | u32 | `1920000` | IQ capture rate in Hz |
 | `bandwidth` | u32 | `1500000` | Hardware IF filter bandwidth in Hz |
 | `center_offset_hz` | i64 | `100000` | Offset from dial to avoid DC spur |
+| `spectrum_fft_size` | usize | `1024` | Spectrum FFT bins; power of two, 128–8192 |
+| `spectrum_interval_ms` | u64 | `50` | How often a spectrum frame is pushed to subscribed clients |
+
+Spectrum is the largest thing on the client connection. On a slow or
+high-latency link, halving `spectrum_fft_size` halves the bytes per frame (at
+half the frequency resolution) and raising `spectrum_interval_ms` sends fewer of
+them; see [Spectrum over a slow link](#spectrum-over-a-slow-link).
 
 #### `[sdr.gain]`
 
@@ -295,6 +302,7 @@ Rigs without an explicit `id` get auto-generated IDs like `ft817_0`, `soapysdr_1
 |-------|------|---------|-------------|
 | `url` | string | — | Server address (e.g. `localhost:4530`) |
 | `poll_interval_ms` | u64 | `750` | State poll interval |
+| `spectrum_interval_ms` | u64 | `50` | Spectrum frame interval; also settable per `[[remotes]]` entry |
 
 #### `[remote.auth]`
 
@@ -394,6 +402,41 @@ older single `port` key and `--rigctl-port` are ignored.
 The bridge is intended for WSJT-X integration via virtual audio devices (ALSA
 loopback on Linux, BlackHole on macOS).
 
+### Spectrum over a slow link
+
+Spectrum dominates the server↔client connection: everything else is a few
+hundred bytes, a frame is a few kilobytes. Three things govern what it costs.
+
+**Frames are pushed, not polled.** The client subscribes and the server sends
+frames at `[sdr].spectrum_interval_ms`. Polling cost a round trip per frame, so
+the rate was capped at 1/RTT — on a 200 ms link you could not exceed 5 frames a
+second however often the client asked. Clients fall back to polling
+automatically against a server too old to stream.
+
+**Bins travel as whole dBFS.** They are base64-encoded `i8` on the wire, about
+an eighth of the JSON array of floats they used to be, at the resolution the
+display draws anyway.
+
+**Both ends have a rate, and the slower one wins.** The server pushes no faster
+than `[sdr].spectrum_interval_ms`; the client asks for no more than
+`[[remotes]].spectrum_interval_ms`.
+
+For a link that struggles, start here:
+
+```toml
+[trx-server.sdr]
+spectrum_fft_size = 512      # half the bins, half the bytes
+spectrum_interval_ms = 200   # 5 frames/s instead of 20
+
+[[trx-client.remotes]]
+name = "remote-site"
+url = "radio.example.com:4530"
+spectrum_interval_ms = 200
+```
+
+That is roughly 0.7 KB per frame at 5 frames/s — about 3.5 KB/s, against
+roughly 200 KB/s for 1024 float bins at 20 frames/s.
+
 ### CLI Override Summary
 
 **trx-server:**
@@ -411,6 +454,29 @@ listener and every rig's audio listener.
 
 ---
 
+## Multiple Rigs in the Web UI
+
+A client connected to several rigs decodes all of them at once, whichever one
+is on screen. The rig picker in the header decides which rig the UI is about,
+and each page answers that differently:
+
+| Page | Shows |
+|------|-------|
+| Radio | The selected rig: its spectrum, its audio, and the mini decode views over the waterfall. |
+| Digital Modes | The selected rig: every decoder panel, its counts and its status line. |
+| Map | The whole station — every rig's positions, with the map's own rig filter to narrow it. HF APRS is a source of its own there, filtered apart from VHF APRS. |
+| Statistics | The whole station, including the per-rig comparison. |
+
+Switching rigs repaints the radio and digital modes pages for the rig now
+selected. Nothing is lost by switching: the traffic other rigs heard is still
+held, and switching back brings it up again. The one exception is the CW pane,
+which is a single running stream of copied text rather than a list of frames,
+so it starts empty on the rig you switch to.
+
+Each browser tab keeps its own selection, so two tabs can watch two rigs.
+
+---
+
 ## Tune Links
 
 Every page of the web UI carries what the radio is doing in its address, so the

src/trx-client/src/main.rs

@@ -288,6 +288,7 @@ async fn async_init() -> DynResult<AppState> {
         let token = cli.token.clone().or_else(|| cfg.remote.auth.token.clone());
         let poll_interval_ms = cli.poll_interval_ms.unwrap_or(cfg.remote.poll_interval_ms);
         vec![RemoteEntry {
+            spectrum_interval_ms: cfg.remote.spectrum_interval_ms,
             name,
             url: url.clone(),
             rig_id,
@@ -483,6 +484,13 @@ async fn async_init() -> DynResult<AppState> {
             .map(|e| e.poll_interval_ms)
             .min()
             .unwrap_or(750);
+        // Entries sharing a server share its connections, so the most frequent
+        // request wins: whoever wants spectrum fastest sets the rate.
+        let spectrum_interval = entries
+            .iter()
+            .map(|e| e.spectrum_interval_ms)
+            .min()
+            .unwrap_or_else(|| remote_client::DEFAULT_SPECTRUM_INTERVAL.as_millis() as u64);
 
         let (server_tx, server_rx) = mpsc::channel::<RigRequest>(RIG_TASK_CHANNEL_BUFFER);
         for entry in entries {
@@ -496,6 +504,8 @@ async fn async_init() -> DynResult<AppState> {
             known_rigs: frontend_runtime.routing.remote_rigs.clone(),
             rig_states: frontend_runtime.routing.rig_states.clone(),
             poll_interval: Duration::from_millis(poll_interval),
+            spectrum_interval: Duration::from_millis(spectrum_interval),
+            spectrum_stream_unsupported: Arc::new(std::sync::atomic::AtomicBool::new(false)),
             spectrum: frontend_runtime.spectrum.sender.clone(),
             rig_spectrums: frontend_runtime.spectrum.per_rig.clone(),
             server_connected: frontend_runtime.routing.server_connected.clone(),

src/trx-client/src/remote_client.rs

@@ -20,7 +20,7 @@ use trx_core::{RigError, RigResult};
 use trx_frontend::{RemoteRigEntry, SharedSpectrum};
 use trx_protocol::rig_command_to_client;
 use trx_protocol::types::RigEntry;
-use trx_protocol::{ClientCommand, ClientEnvelope, ClientResponse, MeterUpdate};
+use trx_protocol::{ClientCommand, ClientEnvelope, ClientResponse, MeterUpdate, SpectrumFrame};
 
 // Endpoint parsing lives in `trx-config` so config validation and the
 // connection code agree on what a URL means.
@@ -32,9 +32,10 @@ const SPECTRUM_IO_TIMEOUT: Duration = Duration::from_secs(3);
 const MAX_JSON_LINE_BYTES: usize = 256 * 1024;
 const MAX_CONSECUTIVE_POLL_FAILURES: u32 = 3;
 
-// Keep remote spectrum reasonably responsive without returning to the old
+// Default spectrum cadence when a config does not specify one.  Both the push
-// timeout churn caused by a much tighter request cadence.
+// stream and the poll fallback run at the configured rate; see
-const SPECTRUM_POLL_INTERVAL: Duration = Duration::from_millis(50);
+// `[[remotes]].spectrum_interval_ms`.
+pub const DEFAULT_SPECTRUM_INTERVAL: Duration = Duration::from_millis(50);
 
 #[derive(Clone)]
 pub struct RemoteClientConfig {
@@ -43,6 +44,12 @@ pub struct RemoteClientConfig {
     pub selected_rig_id: Arc<Mutex<Option<String>>>,
     pub known_rigs: Arc<Mutex<Vec<RemoteRigEntry>>>,
     pub poll_interval: Duration,
+    /// How often spectrum frames are wanted.  Drives the poll fallback and is
+    /// the rate the client asks the server to push at.
+    pub spectrum_interval: Duration,
+    /// Set once a server has rejected `SubscribeSpectrum`, so later
+    /// connections to it go straight to polling instead of asking again.
+    pub spectrum_stream_unsupported: Arc<AtomicBool>,
     /// Spectrum watch sender; spectrum task publishes here, SSE clients subscribe.
     pub spectrum: Arc<watch::Sender<SharedSpectrum>>,
     /// Shared flag: `true` while a TCP connection to trx-server is active.
@@ -491,6 +498,100 @@ async fn send_get_sat_passes_on(
     ))
 }
 
+/// What ended a spectrum stream attempt.
+enum SpectrumStreamOutcome {
+    /// The stream ran and is over; the connection is spent.
+    Finished,
+    /// The server rejected the subscription.  The connection is still usable,
+    /// so the caller can poll on it.
+    Unsupported,
+}
+
+/// Subscribe to the server's spectrum push for one rig and publish frames as
+/// they arrive.
+///
+/// The server answers either with frames or, when it is too old to know the
+/// command, with an error response — which leaves the connection usable for
+/// polling, so falling back costs no reconnect.
+async fn run_spectrum_stream(
+    config: &RemoteClientConfig,
+    writer: &mut (impl AsyncWriteExt + Unpin),
+    reader: &mut (impl AsyncBufRead + Unpin),
+    short_name: &str,
+    shutdown_rx: &mut watch::Receiver<bool>,
+) -> RigResult<SpectrumStreamOutcome> {
+    let envelope = build_envelope(
+        config,
+        ClientCommand::SubscribeSpectrum,
+        Some(short_name.to_string()),
+    );
+    let mut payload = serde_json::to_string(&envelope)
+        .map_err(|e| RigError::communication(format!("JSON serialize failed: {e}")))?;
+    payload.push('\n');
+    time::timeout(SPECTRUM_IO_TIMEOUT, writer.write_all(payload.as_bytes()))
+        .await
+        .map_err(|_| RigError::communication("spectrum subscribe write timed out".to_string()))?
+        .map_err(|e| RigError::communication(format!("spectrum subscribe write failed: {e}")))?;
+    time::timeout(SPECTRUM_IO_TIMEOUT, writer.flush())
+        .await
+        .map_err(|_| RigError::communication("spectrum subscribe flush timed out".to_string()))?
+        .map_err(|e| RigError::communication(format!("spectrum subscribe flush failed: {e}")))?;
+
+    // Re-check what the UI wants: switching rigs has to end this stream so the
+    // connection can be rebuilt for the new one.
+    let mut supervisor = time::interval(Duration::from_millis(500));
+    supervisor.tick().await;
+
+    loop {
+        tokio::select! {
+            changed = shutdown_rx.changed() => {
+                match changed {
+                    Ok(()) if *shutdown_rx.borrow() => return Ok(SpectrumStreamOutcome::Finished),
+                    Ok(()) => {}
+                    Err(_) => return Ok(SpectrumStreamOutcome::Finished),
+                }
+            }
+            _ = supervisor.tick() => {
+                let wanted = active_spectrum_rig_ids(config);
+                if wanted.len() != 1 || wanted[0] != short_name {
+                    return Ok(SpectrumStreamOutcome::Finished);
+                }
+            }
+            line = read_limited_line(reader, MAX_JSON_LINE_BYTES) => {
+                let line = line
+                    .map_err(|e| RigError::communication(format!("spectrum read failed: {e}")))?
+                    .ok_or_else(|| {
+                        RigError::communication("spectrum connection closed".to_string())
+                    })?;
+                let trimmed = line.trim_end();
+                if trimmed.is_empty() {
+                    continue;
+                }
+                match serde_json::from_str::<SpectrumFrame>(trimmed) {
+                    Ok(frame) => publish_spectrum_frame(config, short_name, frame),
+                    // Anything that is not a frame means the server would rather
+                    // answer than stream: an older build rejecting the command.
+                    Err(_) => return Ok(SpectrumStreamOutcome::Unsupported),
+                }
+            }
+        }
+    }
+}
+
+/// Publish one pushed frame to the per-rig and selected-rig watch channels.
+fn publish_spectrum_frame(config: &RemoteClientConfig, short_name: &str, frame: SpectrumFrame) {
+    if let Ok(map) = config.rig_spectrums.read() {
+        if let Some(tx) = map.get(short_name) {
+            tx.send_modify(|s| s.set(Some(frame.spectrum.clone()), frame.vchan_rds.clone()));
+        }
+    }
+    if selected_rig_id(config).as_deref() == Some(short_name) {
+        config
+            .spectrum
+            .send_modify(|s| s.set(Some(frame.spectrum), frame.vchan_rds));
+    }
+}
+
 async fn handle_spectrum_connection(
     config: &RemoteClientConfig,
     stream: TcpStream,
@@ -498,7 +599,33 @@ async fn handle_spectrum_connection(
 ) -> RigResult<()> {
     let (reader, mut writer) = stream.into_split();
     let mut reader = BufReader::new(reader);
-    let mut interval = time::interval(SPECTRUM_POLL_INTERVAL);
+
+    // Prefer the push stream: polling costs a round trip per frame, so on a
+    // high-latency link the frame rate is 1/RTT no matter what interval is
+    // configured.  It only works for one rig per connection, and only against
+    // a server new enough to understand the command.
+    let streamable = active_spectrum_rig_ids(config);
+    if streamable.len() == 1 && !config.spectrum_stream_unsupported.load(Ordering::Relaxed) {
+        match run_spectrum_stream(
+            config,
+            &mut writer,
+            &mut reader,
+            &streamable[0],
+            shutdown_rx,
+        )
+        .await?
+        {
+            SpectrumStreamOutcome::Finished => return Ok(()),
+            SpectrumStreamOutcome::Unsupported => {
+                info!("Server does not support spectrum streaming; falling back to polling");
+                config
+                    .spectrum_stream_unsupported
+                    .store(true, Ordering::Relaxed);
+            }
+        }
+    }
+
+    let mut interval = time::interval(config.spectrum_interval);
     // Cache the token outside the poll loop to avoid cloning it every 50ms.
     let cached_token = config.token.clone();
 
@@ -1187,6 +1314,7 @@ mod tests {
     use super::{has_short_names, resolve_server_rig_id, resolve_short_name};
     use super::{
         parse_audio_url, parse_remote_url, RemoteClientConfig, RemoteEndpoint, SharedSpectrum,
+        DEFAULT_SPECTRUM_INTERVAL,
     };
     use std::collections::HashMap;
     use std::sync::atomic::AtomicBool;
@@ -1381,6 +1509,8 @@ mod tests {
                 selected_rig_id: Arc::new(Mutex::new(None)),
                 known_rigs: Arc::new(Mutex::new(Vec::new())),
                 poll_interval: Duration::from_millis(100),
+                spectrum_interval: DEFAULT_SPECTRUM_INTERVAL,
+                spectrum_stream_unsupported: Arc::new(AtomicBool::new(false)),
                 spectrum: Arc::new(spectrum_tx),
                 server_connected: Arc::new(AtomicBool::new(false)),
                 rig_server_connected: Arc::new(RwLock::new(HashMap::new())),
@@ -1426,6 +1556,8 @@ mod tests {
             selected_rig_id: Arc::new(Mutex::new(Some("sdr".to_string()))),
             known_rigs: Arc::new(Mutex::new(Vec::new())),
             poll_interval: Duration::from_millis(500),
+            spectrum_interval: DEFAULT_SPECTRUM_INTERVAL,
+            spectrum_stream_unsupported: Arc::new(AtomicBool::new(false)),
             spectrum: Arc::new(spectrum_tx),
             server_connected: Arc::new(AtomicBool::new(false)),
             rig_server_connected: Arc::new(RwLock::new(HashMap::new())),
@@ -1441,6 +1573,130 @@ mod tests {
         assert_eq!(envelope.rig_id.as_deref(), Some("sdr"));
     }
 
+    fn stream_test_config(spectrum_tx: watch::Sender<SharedSpectrum>) -> super::RemoteClientConfig {
+        super::RemoteClientConfig {
+            addr: "127.0.0.1:4530".to_string(),
+            token: None,
+            selected_rig_id: Arc::new(Mutex::new(Some("sdr".to_string()))),
+            known_rigs: Arc::new(Mutex::new(Vec::new())),
+            poll_interval: Duration::from_millis(500),
+            spectrum_interval: DEFAULT_SPECTRUM_INTERVAL,
+            spectrum_stream_unsupported: Arc::new(AtomicBool::new(false)),
+            spectrum: Arc::new(spectrum_tx),
+            server_connected: Arc::new(AtomicBool::new(false)),
+            rig_server_connected: Arc::new(RwLock::new(HashMap::new())),
+            rig_states: Arc::new(RwLock::new(HashMap::new())),
+            rig_spectrums: Arc::new(RwLock::new(HashMap::new())),
+            rig_id_to_short_name: HashMap::new(),
+            short_name_to_rig_id: Arc::new(RwLock::new(HashMap::new())),
+            sat_passes: Arc::new(RwLock::new(None)),
+            rig_meters: Arc::new(RwLock::new(HashMap::new())),
+        }
+    }
+
+    /// A pushed frame reaches the watch channel the UI reads, with no request
+    /// from the client beyond the initial subscribe.
+    #[tokio::test]
+    async fn spectrum_stream_publishes_pushed_frames() {
+        use tokio::io::{AsyncBufReadExt, BufReader};
+
+        let (spectrum_tx, mut spectrum_rx) = watch::channel(SharedSpectrum::default());
+        let config = stream_test_config(spectrum_tx);
+        let (shutdown_tx, mut shutdown_rx) = watch::channel(false);
+
+        let (client_io, mut server_io) = tokio::io::duplex(64 * 1024);
+        let (client_read, mut client_write) = tokio::io::split(client_io);
+        let mut client_read = BufReader::new(client_read);
+
+        let task = tokio::spawn(async move {
+            super::run_spectrum_stream(
+                &config,
+                &mut client_write,
+                &mut client_read,
+                "sdr",
+                &mut shutdown_rx,
+            )
+            .await
+        });
+
+        // The server sees the subscribe, then pushes without being asked.
+        let mut server = BufReader::new(&mut server_io);
+        let mut subscribe = String::new();
+        server.read_line(&mut subscribe).await.expect("subscribe");
+        assert!(
+            subscribe.contains("subscribe_spectrum"),
+            "unexpected command: {subscribe}"
+        );
+
+        let frame = trx_protocol::SpectrumFrame {
+            rig_id: "sdr".to_string(),
+            spectrum: trx_core::rig::state::SpectrumData {
+                bins: vec![-70.0, -30.0],
+                center_hz: 14_200_000,
+                sample_rate: 1_920_000,
+                rds: None,
+            },
+            vchan_rds: None,
+        };
+        let mut line = serde_json::to_string(&frame).unwrap();
+        line.push('\n');
+        server_io.write_all(line.as_bytes()).await.expect("push");
+        server_io.flush().await.expect("flush");
+
+        spectrum_rx.changed().await.expect("spectrum published");
+        let published = spectrum_rx.borrow().clone();
+        let spectrum = published.frame.expect("spectrum present");
+        assert_eq!(spectrum.center_hz, 14_200_000);
+        assert_eq!(spectrum.bins, vec![-70.0, -30.0]);
+
+        let _ = shutdown_tx.send(true);
+        let _ = task.await;
+    }
+
+    /// An older server answers the unknown command with an error instead of
+    /// frames.  That has to read as "poll instead", not as a dead connection.
+    #[tokio::test]
+    async fn spectrum_stream_falls_back_when_unsupported() {
+        use tokio::io::{AsyncBufReadExt, BufReader};
+
+        let (spectrum_tx, _spectrum_rx) = watch::channel(SharedSpectrum::default());
+        let config = stream_test_config(spectrum_tx);
+        let (_shutdown_tx, mut shutdown_rx) = watch::channel(false);
+
+        let (client_io, mut server_io) = tokio::io::duplex(64 * 1024);
+        let (client_read, mut client_write) = tokio::io::split(client_io);
+        let mut client_read = BufReader::new(client_read);
+
+        let task = tokio::spawn(async move {
+            super::run_spectrum_stream(
+                &config,
+                &mut client_write,
+                &mut client_read,
+                "sdr",
+                &mut shutdown_rx,
+            )
+            .await
+        });
+
+        let mut server = BufReader::new(&mut server_io);
+        let mut subscribe = String::new();
+        server.read_line(&mut subscribe).await.expect("subscribe");
+
+        server_io
+            .write_all(
+                b"{\"success\":false,\"state\":null,\"error\":\"Invalid JSON: unknown variant\"}\n",
+            )
+            .await
+            .expect("error response");
+        server_io.flush().await.expect("flush");
+
+        let outcome = task.await.expect("join").expect("stream result");
+        assert!(
+            matches!(outcome, super::SpectrumStreamOutcome::Unsupported),
+            "an error response should fall back to polling"
+        );
+    }
+
     #[test]
     fn build_envelope_translates_short_name_to_server_rig_id() {
         let (spectrum_tx, _spectrum_rx) = watch::channel(SharedSpectrum::default());
@@ -1454,6 +1710,8 @@ mod tests {
             selected_rig_id: Arc::new(Mutex::new(Some("home-hf".to_string()))),
             known_rigs: Arc::new(Mutex::new(Vec::new())),
             poll_interval: Duration::from_millis(500),
+            spectrum_interval: DEFAULT_SPECTRUM_INTERVAL,
+            spectrum_stream_unsupported: Arc::new(AtomicBool::new(false)),
             spectrum: Arc::new(spectrum_tx),
             server_connected: Arc::new(AtomicBool::new(false)),
             rig_server_connected: Arc::new(RwLock::new(HashMap::new())),
@@ -1486,6 +1744,8 @@ mod tests {
             selected_rig_id: Arc::new(Mutex::new(None)),
             known_rigs: Arc::new(Mutex::new(Vec::new())),
             poll_interval: Duration::from_millis(500),
+            spectrum_interval: DEFAULT_SPECTRUM_INTERVAL,
+            spectrum_stream_unsupported: Arc::new(AtomicBool::new(false)),
             spectrum: Arc::new(spectrum_tx),
             server_connected: Arc::new(AtomicBool::new(false)),
             rig_server_connected: Arc::new(RwLock::new(HashMap::new())),
@@ -1510,6 +1770,8 @@ mod tests {
             selected_rig_id: Arc::new(Mutex::new(None)),
             known_rigs: Arc::new(Mutex::new(Vec::new())),
             poll_interval: Duration::from_millis(500),
+            spectrum_interval: DEFAULT_SPECTRUM_INTERVAL,
+            spectrum_stream_unsupported: Arc::new(AtomicBool::new(false)),
             spectrum: Arc::new(spectrum_tx),
             server_connected: Arc::new(AtomicBool::new(false)),
             rig_server_connected: Arc::new(RwLock::new(HashMap::new())),
@@ -1550,6 +1812,8 @@ mod tests {
             selected_rig_id: Arc::new(Mutex::new(None)),
             known_rigs: known_rigs.clone(),
             poll_interval: Duration::from_millis(500),
+            spectrum_interval: DEFAULT_SPECTRUM_INTERVAL,
+            spectrum_stream_unsupported: Arc::new(AtomicBool::new(false)),
             spectrum: Arc::new(spectrum_tx),
             server_connected: Arc::new(AtomicBool::new(false)),
             rig_server_connected: Arc::new(RwLock::new(HashMap::new())),
@@ -1623,6 +1887,8 @@ mod tests {
             selected_rig_id,
             known_rigs,
             poll_interval: Duration::from_millis(500),
+            spectrum_interval: DEFAULT_SPECTRUM_INTERVAL,
+            spectrum_stream_unsupported: Arc::new(AtomicBool::new(false)),
             spectrum: Arc::new(spectrum_tx),
             server_connected: Arc::new(AtomicBool::new(false)),
             rig_server_connected: Arc::new(RwLock::new(HashMap::new())),

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/ais.js

@@ -1,3 +1,7 @@
+import {
+  forActiveRig,
+  isActiveRigDecode
+} from "./chunk-S57W63QN.js";
 import {
   hostCore,
   hostState
@@ -140,18 +144,22 @@ function aisLatestByVessel(messages) {
   }
   return Array.from(byMmsi.values());
 }
+function aisRigMessages() {
+  return forActiveRig(aisMessageHistory);
+}
 function updateAisSummary() {
   const plan = currentAisChannelPlan();
   if (aisChannelSummaryEl) {
     aisChannelSummaryEl.textContent = `A ${formatAisMhz(plan.aHz)} · B ${formatAisMhz(plan.bHz)}`;
   }
-  const vessels = aisLatestByVessel(aisMessageHistory);
+  const rigMessages = aisRigMessages();
+  const vessels = aisLatestByVessel(rigMessages);
   if (aisVesselCountEl) {
     const count = vessels.length;
     aisVesselCountEl.textContent = `${count} vessel${count === 1 ? "" : "s"}`;
   }
   if (aisLatestSeenEl) {
-    const latest = aisMessageHistory[0];
+    const latest = rigMessages[0];
     if (!latest) {
       aisLatestSeenEl.textContent = "No traffic yet";
     } else {
@@ -222,7 +230,9 @@ function updateAisBar() {
   updateAisSummary();
   const isAis = (document.getElementById("mode")?.value || "").toUpperCase() === "AIS";
   const cutoffMs = Date.now() - AIS_BAR_WINDOW_MS;
-  const recent = aisMessageHistory.filter((msg) => (msg._tsMs ?? 0) >= cutoffMs);
+  const recent = aisMessageHistory.filter(
+    (msg) => (msg._tsMs ?? 0) >= cutoffMs && isActiveRigDecode(msg.rig_id)
+  );
   const messages = aisLatestByVessel(recent).slice(0, 8);
   if (!isAis || messages.length === 0) {
     aisBarOverlay.style.display = "none";
@@ -267,7 +277,7 @@ function renderAisHistory() {
     return;
   }
   const fragment = document.createDocumentFragment();
-  for (const message of aisMessageHistory) {
+  for (const message of aisRigMessages()) {
     fragment.appendChild(renderAisRow(message));
   }
   aisMessagesEl.replaceChildren(fragment);
@@ -299,10 +309,10 @@ function normalizeServerAisMessage(msg) {
 }
 function onServerAisBatch(messages) {
   if (!Array.isArray(messages) || messages.length === 0) return;
-  if (aisStatus) aisStatus.textContent = "Receiving";
   const normalized = [];
   for (const msg of messages) {
     const next = normalizeServerAisMessage(msg);
+    if (aisStatus && isActiveRigDecode(next.rig_id)) aisStatus.textContent = "Receiving";
     const tsMs = Number.isFinite(next.ts_ms) ? Number(next.ts_ms) : Date.now();
     next._tsMs = tsMs;
     next._ts = new Date(tsMs).toLocaleTimeString([], {
@@ -342,8 +352,9 @@ if (aisFilterInput) {
   });
 }
 function onServerAis(msg) {
-  if (aisStatus) aisStatus.textContent = "Receiving";
+  const message = normalizeServerAisMessage(msg);
-  addAisMessage(normalizeServerAisMessage(msg));
+  if (aisStatus && isActiveRigDecode(message.rig_id)) aisStatus.textContent = "Receiving";
+  addAisMessage(message);
 }
 updateAisSummary();
 window.trxPluginRuntime.registerDecoder({
@@ -353,6 +364,10 @@ window.trxPluginRuntime.registerDecoder({
   restore: onServerAisBatch,
   reset: resetAisHistoryView,
   prune: pruneAisHistoryView,
+  rerender: () => {
+    updateAisBar();
+    renderAisHistory();
+  },
   // Oldest first, so vessel tracks are rebuilt in the order they happened.
   syncMap: () => {
     for (const entry of [...aisMessageHistory].reverse()) plotAisMessage(entry);

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/app.js

@@ -885,7 +885,7 @@ function elementById(id) {
       if (restoreFocus) more.focus();
     };
     api.closeMobileOverlays = closeMore;
-    ["statistics", "recorder", "settings", "about"].forEach((tabName) => {
+    ["satellites", "statistics", "recorder", "settings", "about"].forEach((tabName) => {
       const source = nav.querySelector(`[data-tab="${tabName}"]`);
       if (!source) return;
       const item = document.createElement("button");
@@ -1065,6 +1065,9 @@ var runtime = {
     plugin.prune();
     return true;
   },
+  rerenderAll() {
+    for (const plugin of decoders.values()) plugin.rerender?.();
+  },
   syncMapAll() {
     for (const plugin of decoders.values()) plugin.syncMap?.();
   },
@@ -1529,6 +1532,7 @@ var TAB_ORDER = [
   "bookmarks",
   "digital-modes",
   "map",
+  "satellites",
   "statistics",
   "recorder",
   "settings",
@@ -1539,6 +1543,7 @@ var TAB_PATHS = {
   bookmarks: "/bookmarks",
   "digital-modes": "/digital-modes",
   map: "/map",
+  satellites: "/satellites",
   statistics: "/statistics",
   recorder: "/recorder",
   settings: "/settings",
@@ -1756,6 +1761,7 @@ var pluginGroups = {
   ],
   "map-data": ["/map-core.js", "/ais.js", "/vdes.js", "/aprs.js", "/hf-aprs.js"],
   map: ["/map-core.js", "/ais.js", "/vdes.js", "/aprs.js", "/hf-aprs.js", "/sat.js", "/sat-scheduler.js"],
+  satellites: ["/satellite-predictions.js"],
   statistics: ["/map-core.js"],
   bookmarks: ["/bookmarks.js"],
   recorder: [],
@@ -2899,9 +2905,9 @@ function applyRigList(activeRigId, rigIds, displayNames) {
   populateRigPicker(headerRigSwitchSelect, lastRigIds, lastActiveRigId, disableSwitch);
   updateRigSubtitle(lastActiveRigId);
   window.trxUi?.setActiveRig(lastActiveRigId);
+  window.trx.modules.scheduler?.setRig(lastActiveRigId);
+  window.trx.modules.backgroundDecode?.setRig(lastActiveRigId);
   if (rigListChanged) {
-    window.trx.modules.scheduler?.setRig(lastActiveRigId);
-    window.trx.modules.backgroundDecode?.setRig(lastActiveRigId);
     window.trx.modules.bookmarks?.populateScopePicker();
     void window.trx.modules.bookmarks?.fetch(document.getElementById("bm-category-filter")?.value || "");
   }
@@ -3552,6 +3558,13 @@ function positionRdsPsOverlay() {
 function resetRdsDisplay() {
   updateRdsPsOverlay(primaryRds);
 }
+function refreshDecodeBars() {
+  window.updateAisBar?.();
+  window.updateVdesBar?.();
+  window.updateAprsBar?.();
+  window.updateFt8Bar?.();
+  window.updateCwBar?.();
+}
 function resetDecoderStateOnRigSwitch() {
   primaryRds = null;
   vchanRdsById = /* @__PURE__ */ new Map();
@@ -3566,6 +3579,8 @@ function resetDecoderStateOnRigSwitch() {
     const el = document.getElementById(id);
     if (el) el.textContent = "--";
   });
+  refreshDecodeBars();
+  window.trxPluginRuntime.rerenderAll();
 }
 function resetWfmStereoIndicator() {
   if (!wfmStFlagEl) return;
@@ -4785,10 +4800,7 @@ function render(update) {
     const connText = _decodeConnectedText[d.id] || "Connected, listening for packets";
     setModeBoundDecodeStatus(el, d.active_modes, "Select " + d.active_modes[0] + " mode to decode", connText);
   }
-  if (window.updateAisBar) window.updateAisBar();
+  refreshDecodeBars();
-  if (window.updateVdesBar) window.updateVdesBar();
-  if (window.updateAprsBar) window.updateAprsBar();
-  if (window.updateFt8Bar) window.updateFt8Bar();
   for (const d of decoderRegistry) {
     if (d.activation !== "toggle") continue;
     const key = d.id.replace(/-/g, "_") + "_decode_enabled";
@@ -5844,6 +5856,7 @@ function _initMapWhenReady() {
 }
 function navigateToTab(name, options = {}) {
   window.trxUi?.closeMobileOverlays?.();
+  const leavingSatellites = _activeTab === "satellites" && name !== "satellites";
   const { updateHistory = true, replaceHistory = false } = options;
   if (authEnabled && !authRole && name !== "main") {
     showAuthGate(false);
@@ -5873,7 +5886,11 @@ function navigateToTab(name, options = {}) {
     updateTabHistory(name, replaceHistory);
   }
   scheduleSpectrumLayout();
-  void loadPluginsForTab(name).catch((error) => {
+  if (leavingSatellites) window.clearSatPredictionDom?.();
+  void loadPluginsForTab(name).then(() => {
+    if (name === "satellites") window.refreshSatPredictions?.();
+    flushPendingDecodeStats();
+  }).catch((error) => {
     console.error(error);
   });
   if (name === "map") {
@@ -5984,7 +6001,9 @@ async function initializeApp() {
     showAuthGate(allowGuest);
   }
 }
+var settingsUiReady = false;
 function initSettingsUI() {
+  settingsUiReady = true;
   window.trx.modules.scheduler?.initialize(lastActiveRigId, authRole);
   window.trx.modules.scheduler?.wireEvents();
   if (window.trx.modules.backgroundDecode) {
@@ -6255,7 +6274,9 @@ Object.defineProperties(trxState, {
   } }
 });
 window.trx = Object.freeze({ state: trxState, core: trxCore, modules: trxModules });
-void loadEagerPlugins().catch((error) => {
+void loadEagerPlugins().then(() => {
+  if (settingsUiReady) initSettingsUI();
+}).catch((error) => {
   console.error(error);
 });
 void initializeApp();
@@ -6320,9 +6341,6 @@ function _wireSubTabBar(bar) {
         if (window.refreshCwTonePicker) window.refreshCwTonePicker();
       });
     }
-    if (btn.dataset.subtab !== "sat" && typeof window.clearSatPredictionDom === "function") {
-      window.clearSatPredictionDom();
-    }
   });
 }
 document.querySelectorAll(".sub-tab-bar").forEach(_wireSubTabBar);
@@ -7606,11 +7624,35 @@ var IMAGE_DECODE_KINDS = /* @__PURE__ */ new Set([
   "sstv",
   "sstv_progress"
 ]);
+var pendingDecodeStats = [];
+var PENDING_DECODE_STATS_MAX = 5e4;
+function recordDecodeStat(kind, rig, tsMs) {
+  const stats = window.trx.modules.map;
+  if (stats) {
+    stats.statsRecordDecode(kind, rig, tsMs);
+    return;
+  }
+  pendingDecodeStats.push({ kind, rig, tsMs });
+  if (pendingDecodeStats.length > PENDING_DECODE_STATS_MAX) {
+    pendingDecodeStats.splice(0, pendingDecodeStats.length - PENDING_DECODE_STATS_MAX);
+  }
+}
+function flushPendingDecodeStats() {
+  const stats = window.trx.modules.map;
+  if (!stats || pendingDecodeStats.length === 0) return;
+  for (const entry of pendingDecodeStats.splice(0)) {
+    stats.statsRecordDecode(entry.kind, entry.rig, entry.tsMs);
+  }
+  stats.scheduleStatsRender();
+}
+function scheduleStatsRenderIfLoaded() {
+  window.trx.modules.map?.scheduleStatsRender();
+}
 function dispatchDecodeMessage(msg, skipStats = false) {
   if (msg.type) window.trxPluginRuntime.dispatch(msg.type, msg);
   if (!skipStats && msg.type && !IMAGE_DECODE_KINDS.has(msg.type)) {
-    window.trx.modules.map?.statsRecordDecode(msg.type, msg.rig_id || msg.remote || null);
+    recordDecodeStat(msg.type, msg.rig_id || msg.remote || null);
-    window.trx.modules.map?.scheduleStatsRender();
+    scheduleStatsRenderIfLoaded();
   }
 }
 var DECODE_HISTORY_WORKER_GROUP_LIMIT = 512;
@@ -7656,9 +7698,9 @@ function restoreDecodeHistoryGroup(kind, messages) {
   if (!Array.isArray(messages) || messages.length === 0) return;
   if (!IMAGE_DECODE_KINDS.has(kind)) {
     for (const msg of messages) {
-      window.trx.modules.map?.statsRecordDecode(kind, msg.rig_id || msg.remote || null, msg.ts_ms || void 0);
+      recordDecodeStat(kind, msg.rig_id || msg.remote || null, msg.ts_ms || void 0);
     }
-    window.trx.modules.map?.scheduleStatsRender();
+    scheduleStatsRenderIfLoaded();
   }
   window.trxPluginRuntime.restore(kind, messages);
 }

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/aprs.js

@@ -5,6 +5,10 @@ import {
   normalizeAprsPacket,
   renderAprsPacketRow
 } from "./chunk-OPEIVJGD.js";
+import {
+  forActiveRig,
+  isActiveRigDecode
+} from "./chunk-S57W63QN.js";
 import {
   hostCore,
   hostState
@@ -82,20 +86,25 @@ function aprsFilterMatch(pkt) {
   ].filter(Boolean).join(" ").toUpperCase();
   return haystack.includes(aprsFilterText);
 }
+function aprsRigPackets() {
+  return forActiveRig(aprsPacketHistory);
+}
 function aprsVisiblePackets() {
-  const packets = aprsCollapseDup ? collapseAprsDuplicates(aprsPacketHistory) : aprsPacketHistory;
+  const rigPackets = aprsRigPackets();
+  const packets = aprsCollapseDup ? collapseAprsDuplicates(rigPackets) : rigPackets;
   return packets.filter(aprsFilterMatch);
 }
 function updateAprsSummary() {
+  const rigPackets = aprsRigPackets();
   const visible = aprsVisiblePackets();
   if (aprsTotalCountEl) {
-    aprsTotalCountEl.textContent = `${aprsPacketHistory.length} total`;
+    aprsTotalCountEl.textContent = `${rigPackets.length} total`;
   }
   if (aprsVisibleCountEl) {
     aprsVisibleCountEl.textContent = `${visible.length} shown`;
   }
   if (aprsLatestSeenEl) {
-    const latest = aprsPacketHistory[0];
+    const latest = rigPackets[0];
     if (!latest) {
       aprsLatestSeenEl.textContent = "No packets yet";
     } else {
@@ -153,7 +162,9 @@ function updateAprsBar() {
   if (!aprsBarOverlay) return;
   const isPkt = (document.getElementById("mode")?.value || "").toUpperCase() === "PKT";
   const cutoffMs = Date.now() - APRS_BAR_WINDOW_MS;
-  const okFrames = aprsPacketHistory.filter((p) => p.crcOk && (p._tsMs ?? 0) >= cutoffMs);
+  const okFrames = aprsPacketHistory.filter(
+    (p) => p.crcOk && (p._tsMs ?? 0) >= cutoffMs && isActiveRigDecode(p.rig_id)
+  );
   const frames = collapseAprsDuplicates(okFrames).slice(0, 8);
   const newestTsMs = frames.reduce((latest, pkt) => Math.max(latest, Number(pkt._tsMs) || 0), 0);
   if (!isPkt || frames.length === 0 || newestTsMs <= aprsBarDismissedAtMs) {
@@ -215,11 +226,11 @@ function normalizeServerAprsPacket(pkt) {
 }
 function onServerAprsBatch(packets) {
   if (!Array.isArray(packets) || packets.length === 0) return;
-  if (aprsStatus) aprsStatus.textContent = "Receiving";
   const normalized = [];
   let hasCrcOk = false;
   for (const pkt of packets) {
     const next = normalizeServerAprsPacket(pkt);
+    if (aprsStatus && isActiveRigDecode(next.rig_id)) aprsStatus.textContent = "Receiving";
     const tsMs = Number.isFinite(next.ts_ms) ? Number(next.ts_ms) : Date.now();
     next._tsMs = tsMs;
     next._ts = new Date(tsMs).toLocaleTimeString([], { hour: "2-digit", minute: "2-digit", second: "2-digit" });
@@ -277,8 +288,9 @@ if (aprsFilterInput) {
   });
 }
 function onServerAprs(pkt) {
-  if (aprsStatus) aprsStatus.textContent = "Receiving";
+  const packet = normalizeServerAprsPacket(pkt);
-  addAprsPacket(normalizeServerAprsPacket(pkt));
+  if (aprsStatus && isActiveRigDecode(packet.rig_id)) aprsStatus.textContent = "Receiving";
+  addAprsPacket(packet);
 }
 renderAprsHistory();
 window.trxPluginRuntime.registerDecoder({
@@ -288,6 +300,10 @@ window.trxPluginRuntime.registerDecoder({
   restore: onServerAprsBatch,
   reset: resetAprsHistoryView,
   prune: pruneAprsHistoryView,
+  rerender: () => {
+    updateAprsBar();
+    renderAprsHistory();
+  },
   // Oldest first, so station tracks are rebuilt in the order they happened.
   syncMap: () => {
     for (const entry of [...aprsPacketHistory].reverse()) plotAprsPacket(entry);

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/background-decode.js

@@ -19,9 +19,11 @@ var bgdWindow = window;
   let bookmarkList = [];
   let statusInterval = null;
   let bgdDirty = false;
+  let statusByBookmark = /* @__PURE__ */ new Map();
+  let lastStatus = null;
   function initBackgroundDecode(rigId, role) {
     backgroundDecodeRole = role;
-    currentRigId = rigId || null;
+    currentRigId = rigId || hostState.lastActiveRigId || null;
     if (currentRigId) loadBackgroundDecode();
     startStatusPolling();
   }
@@ -108,7 +110,7 @@ var bgdWindow = window;
     }
     setCheckbox("background-decode-enabled", currentConfig.enabled);
     renderBookmarkChecklist();
-    const isControl = backgroundDecodeRole === "control" || hostState.authEnabled === false;
+    const isControl = isControlRole();
     const panel = document.getElementById("background-decode-panel");
     if (panel) {
       panel.querySelectorAll("input, select, button.sch-write").forEach(function(el) {
@@ -119,6 +121,10 @@ var bgdWindow = window;
     const resetBtn = document.getElementById("background-decode-reset-btn");
     if (saveBtn) saveBtn.style.display = isControl ? "" : "none";
     if (resetBtn) resetBtn.style.display = isControl ? "" : "none";
+    syncSaveButton();
+  }
+  function currentFilterText() {
+    return document.getElementById("bgd-bookmark-filter")?.value ?? "";
   }
   function renderBookmarkChecklist(filterText = "") {
     const container = document.getElementById("bgd-bookmark-checklist");
@@ -134,20 +140,49 @@ var bgdWindow = window;
       return text.indexOf(filter) >= 0;
     }) : all;
     if (filtered.length === 0) {
-      container.innerHTML = '<div class="bgd-checklist-empty">' + (all.length === 0 ? "No supported bookmarks available." : "No bookmarks match filter.") + "</div>";
+      container.innerHTML = '<div class="bgd-checklist-empty">' + escHtml(emptyListText(all.length)) + "</div>";
+      renderSelectionSummary();
       return;
     }
     filtered.forEach(function(bookmark) {
       const row = document.createElement("label");
       row.className = "bgd-checklist-row";
+      row.dataset.bmId = bookmark.id;
       const decoders = bookmarkDecoderKinds(bookmark);
-      const checked = selectedIds.has(bookmark.id) ? " checked" : "";
+      const selected = selectedIds.has(bookmark.id);
-      row.innerHTML = '<input type="checkbox"' + checked + ' data-bm-id="' + escHtml(bookmark.id) + '" /><span class="bgd-checklist-name">' + escHtml(bookmark.name) + '</span><span class="bgd-checklist-meta">' + escHtml(formatFreq(bookmark.freq_hz) + " " + bookmark.mode + " · " + decoders.join("/").toUpperCase()) + "</span>";
+      if (selected) row.classList.add("is-selected");
+      row.innerHTML = '<input type="checkbox"' + (selected ? " checked" : "") + ' data-bm-id="' + escHtml(bookmark.id) + '" /><span class="bgd-checklist-name">' + escHtml(bookmark.name) + '</span><span class="bgd-checklist-meta">' + escHtml(formatFreq(bookmark.freq_hz)) + '<span class="bgd-checklist-mode">' + escHtml(bookmark.mode + " · " + decoders.join("/").toUpperCase()) + "</span></span>" + stateBadgeHtml(bookmark.id, selected);
       row.querySelector("input")?.addEventListener("change", function(e) {
         onChecklistToggle(bookmark.id, e.currentTarget.checked);
       });
       container.appendChild(row);
     });
+    renderSelectionSummary();
+  }
+  function emptyListText(supportedCount) {
+    if (supportedCount > 0) return "No bookmark matches that filter.";
+    if (bookmarkList.length > 0) {
+      return "None of your bookmarks name a decoder that can run in the background. Give one a decoder on the Bookmarks tab to list it here.";
+    }
+    return "No bookmarks yet. Save one on the Bookmarks tab and it can be decoded here.";
+  }
+  function stateBadgeHtml(bookmarkId, selected) {
+    if (!selected) return '<span class="bgd-state" data-state="unselected"></span>';
+    const entry = statusByBookmark.get(bookmarkId);
+    const state = entry?.state ?? (currentConfig?.enabled ? "pending" : "disabled");
+    return '<span class="bgd-state" data-state="' + escHtml(state) + '" title="' + escHtml(stateHelp(state)) + '"><span class="bgd-state-dot"></span>' + escHtml(prettyState(state)) + "</span>";
+  }
+  function renderSelectionSummary() {
+    const el = document.getElementById("bgd-selection-summary");
+    if (!el) return;
+    const selected = currentConfig?.bookmark_ids.length ?? 0;
+    if (selected === 0) {
+      el.textContent = "Nothing selected — background decoding is idle.";
+      return;
+    }
+    const active = [...statusByBookmark.values()].filter((entry) => entry.state === "active").length;
+    const noun = `${String(selected)} bookmark${selected === 1 ? "" : "s"} selected`;
+    el.textContent = currentConfig?.enabled ? `${noun}, ${String(active)} decoding now.` : `${noun}. Switch Enabled on to start decoding them.`;
   }
   function onChecklistToggle(bookmarkId, checked) {
     if (!currentConfig) {
@@ -182,7 +217,7 @@ var bgdWindow = window;
     }).catch(function(err) {
       showToast(`Save failed: ${errorMessage(err)}`, true);
     }).finally(function() {
-      if (btn) btn.disabled = false;
+      syncSaveButton();
     });
   }
   async function resetBackgroundDecode() {
@@ -210,59 +245,83 @@ var bgdWindow = window;
     });
   }
   function renderStatus(status) {
-    const card = document.getElementById("background-decode-status-card");
+    lastStatus = status;
-    if (!card) return;
+    statusByBookmark = new Map(
-    const entries = status.entries ?? [];
+      (status.entries ?? []).filter((entry) => typeof entry.bookmark_id === "string" && entry.bookmark_id.length > 0).map((entry) => [entry.bookmark_id, entry])
-    if (!entries.length) {
+    );
-      card.textContent = "No background decode bookmarks configured.";
+    renderSpanSummary();
+    renderBookmarkChecklist(currentFilterText());
+  }
+  function renderSpanSummary() {
+    const el = document.getElementById("bgd-span-summary");
+    if (!el) return;
+    const status = lastStatus;
+    if (!status) {
+      el.textContent = "";
       return;
     }
-    const summary = [];
+    if (!status.active_rig) {
-    if (status.active_rig) {
+      el.textContent = "This rig is not the one playing audio.";
-      if (typeof status.center_hz === "number" && Number.isFinite(status.center_hz)) summary.push("Center " + formatFreq(status.center_hz));
+      el.dataset.tone = "warn";
-      if (typeof status.sample_rate === "number" && Number.isFinite(status.sample_rate) && status.sample_rate > 0) summary.push("Span ±" + formatFreq(status.sample_rate / 2));
+      return;
-    } else {
+    }
-      summary.push("This rig is not currently selected for audio.");
+    const centre = typeof status.center_hz === "number" && Number.isFinite(status.center_hz) ? formatFreq(status.center_hz) : null;
+    const half = typeof status.sample_rate === "number" && Number.isFinite(status.sample_rate) && status.sample_rate > 0 ? formatFreq(status.sample_rate / 2) : null;
+    el.dataset.tone = "";
+    el.textContent = centre && half ? `Span ${centre} ±${half}` : centre ? `Centre ${centre}` : "";
+  }
+  function stateHelp(state) {
+    switch (state) {
+      case "active":
+        return "Decoding on a hidden channel.";
+      case "out_of_span":
+        return "Outside the span the rig is tuned across, so it cannot be heard from here.";
+      case "waiting_for_spectrum":
+        return "Waiting for the first spectrum frame from the rig.";
+      case "waiting_for_user":
+        return "Nobody is listening to this rig, so no audio is being pulled.";
+      case "missing_bookmark":
+        return "The bookmark this was selected from is gone.";
+      case "no_supported_decoders":
+        return "No decoder that runs in the background can decode this bookmark.";
+      case "disabled":
+        return "Background decoding is switched off.";
+      case "handled_by_scheduler":
+      case "scheduler_has_control":
+        return "The scheduler is running this bookmark instead.";
+      case "handled_by_virtual_channel":
+        return "A virtual channel is already on this frequency.";
+      case "pending":
+        return "Selected, and not started yet — save to apply.";
+      default:
+        return "Selected, but not decoding.";
     }
-    let html = summary.length ? '<div style="margin-bottom:0.8rem;color:var(--text-muted);">' + escHtml(summary.join(" · ")) + "</div>" : "";
-    html += '<div class="bgd-status-list">';
-    entries.forEach(function(entry) {
-      const name = entry.bookmark_name || entry.bookmark_id || "Unknown bookmark";
-      const parts = [];
-      if (typeof entry.freq_hz === "number" && Number.isFinite(entry.freq_hz)) parts.push(formatFreq(entry.freq_hz));
-      if (entry.mode) parts.push(entry.mode);
-      if (Array.isArray(entry.decoder_kinds) && entry.decoder_kinds.length) {
-        parts.push(entry.decoder_kinds.join("/").toUpperCase());
-      }
-      html += '<div class="bgd-status-row"><div><div class="bgd-status-name">' + escHtml(name) + '</div><div class="bgd-status-meta">' + escHtml(parts.join(" · ")) + '</div></div><div class="bgd-status-state" data-state="' + escHtml(entry.state || "inactive") + '"><svg class="bgd-state-dot" viewBox="0 0 8 8"><circle cx="4" cy="4" r="3.5"/></svg>' + escHtml(prettyState(entry.state)) + "</div></div>";
-    });
-    html += "</div>";
-    card.innerHTML = html;
   }
   function prettyState(state) {
     switch (state) {
       case "active":
-        return "✓ Active";
+        return "Decoding";
       case "out_of_span":
-        return "△ Out of span";
+        return "Out of span";
       case "waiting_for_spectrum":
-        return "△ Waiting";
+        return "Waiting for spectrum";
       case "waiting_for_user":
-        return "△ No user";
+        return "Nobody listening";
       case "missing_bookmark":
-        return "✗ Missing";
+        return "Bookmark gone";
       case "no_supported_decoders":
-        return "✗ Unsupported";
+        return "No decoder";
       case "disabled":
-        return "△ Disabled";
+        return "Off";
       case "handled_by_scheduler":
-        return "△ Scheduler";
       case "scheduler_has_control":
-        return "△ Scheduler";
+        return "Scheduler has it";
       case "handled_by_virtual_channel":
-        return "△ VChan";
+        return "On a channel";
+      case "pending":
+        return "Not saved";
       default:
-        return "△ Inactive";
+        return "Idle";
     }
   }
   function setCheckbox(id, value) {
@@ -285,13 +344,21 @@ var bgdWindow = window;
   function markBgdDirty() {
     if (bgdDirty) return;
     bgdDirty = true;
-    const btn = document.getElementById("background-decode-save-btn");
+    syncSaveButton();
-    if (btn) btn.classList.add("sch-dirty");
   }
   function clearBgdDirty() {
     bgdDirty = false;
+    syncSaveButton();
+  }
+  function syncSaveButton() {
     const btn = document.getElementById("background-decode-save-btn");
-    if (btn) btn.classList.remove("sch-dirty");
+    if (!btn) return;
+    btn.classList.toggle("sch-dirty", bgdDirty);
+    btn.disabled = !bgdDirty || !isControlRole();
+    btn.title = bgdDirty ? "Apply these bookmarks to the background decoder" : "No changes to save";
+  }
+  function isControlRole() {
+    return backgroundDecodeRole === "control" || hostState.authEnabled === false;
   }
   function showToast(msg, isError) {
     const el = document.getElementById("background-decode-toast");
@@ -311,7 +378,7 @@ var bgdWindow = window;
       return bm.id;
     });
     currentConfig.bookmark_ids = ids;
-    renderBookmarkChecklist(document.getElementById("bgd-bookmark-filter")?.value);
+    renderBookmarkChecklist(currentFilterText());
     markBgdDirty();
   }
   function deselectAllBookmarks() {
@@ -319,7 +386,7 @@ var bgdWindow = window;
       currentConfig = { remote: currentRigId, enabled: false, bookmark_ids: [] };
     }
     currentConfig.bookmark_ids = [];
-    renderBookmarkChecklist(document.getElementById("bgd-bookmark-filter")?.value);
+    renderBookmarkChecklist(currentFilterText());
     markBgdDirty();
   }
   function wireBackgroundDecodeEvents() {
@@ -334,7 +401,9 @@ var bgdWindow = window;
     if (enabledCb && !enabledCb._wired) {
       enabledCb._wired = true;
       enabledCb.addEventListener("change", function() {
+        if (currentConfig) currentConfig.enabled = enabledCb.checked;
         markBgdDirty();
+        renderBookmarkChecklist(currentFilterText());
       });
     }
     const selectAllBtn = document.getElementById("bgd-select-all-btn");

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/chunk-PJ5Q7CWJ.js

@@ -1,3 +1,7 @@
+import {
+  forActiveRig,
+  isActiveRigDecode
+} from "./chunk-S57W63QN.js";
 import {
   hostCore
 } from "./chunk-KL66PICH.js";
@@ -153,9 +157,10 @@ function initializeFtxDecoder(config) {
   const render = () => {
     prune();
     if (!messagesElement) return;
+    const rigMessages = forActiveRig(history);
     const fragment = document.createDocumentFragment();
     let count = 0;
-    for (const message of history) {
+    for (const message of rigMessages) {
       if (count >= 200) break;
       if (filterText && !(message.message ?? "").toUpperCase().includes(filterText)) continue;
       fragment.appendChild(renderRow(message));
@@ -163,20 +168,26 @@ function initializeFtxDecoder(config) {
     }
     messagesElement.replaceChildren(fragment);
   };
-  const normalize = (message) => {
+  const plotLocator = (message) => {
     const raw = message.message ?? "";
     const locatorDetails = bridge.ft8ExtractLocatorDetails?.(raw) ?? extractFtxLocatorDetails(raw);
     const grids = locatorDetails.length > 0 ? locatorDetails.map(({ grid }) => grid) : bridge.ft8ExtractAllGrids?.(raw) ?? extractFtxGrids(raw);
+    if (grids.length === 0) return;
     const station = bridge.ft8ExtractLikelyCallsign?.(raw) ?? extractFtxCallsign(raw);
     const frequency = displayFrequency(message.freq_hz);
-    if (grids.length > 0) {
+    bridge.mapAddLocator?.(raw, grids, id, station, {
-      bridge.mapAddLocator?.(raw, grids, id, station, {
+      ...message,
-        ...message,
+      freq_hz: frequency ?? message.freq_hz,
-        freq_hz: frequency ?? message.freq_hz,
+      locator_details: locatorDetails
-        locator_details: locatorDetails
+    });
-      });
+  };
-    }
+  const normalize = (message) => {
+    const frequency = displayFrequency(message.freq_hz);
+    plotLocator(message);
     return {
+      // The rig that heard it, kept so the mini view can tell a decode of the
+      // rig on screen from one a background rig made on another band.
+      rig_id: message.rig_id ?? null,
       receiver: bridge.getDecodeRigMeta?.() ?? null,
       ts_ms: message.ts_ms,
       snr_db: message.snr_db,
@@ -188,7 +199,9 @@ function initializeFtxDecoder(config) {
   };
   const receiveBatch = (messages) => {
     if (messages.length === 0) return;
-    if (status) status.textContent = "Receiving";
+    if (status && messages.some((message) => isActiveRigDecode(message.rig_id))) {
+      status.textContent = "Receiving";
+    }
     history = messages.map(normalize).reverse().concat(history);
     prune();
     bridge.setFt8FamilyBarDecoder?.(id);
@@ -202,7 +215,7 @@ function initializeFtxDecoder(config) {
     bridge.clearMapMarkersByType?.(id);
   };
   const barFrames = () => {
-    const recent = history.filter((message) => (finiteNumber(message._tsMs ?? message.ts_ms) ?? 0) >= Date.now() - 9e5).slice(0, 8);
+    const recent = history.filter((message) => (finiteNumber(message._tsMs ?? message.ts_ms) ?? 0) >= Date.now() - 9e5 && isActiveRigDecode(message.rig_id)).slice(0, 8);
     let html = "";
     for (const message of recent) {
       const timestamp = finiteNumber(message._tsMs ?? message.ts_ms);
@@ -226,7 +239,15 @@ function initializeFtxDecoder(config) {
       prune();
       render();
     },
-    reset
+    reset,
+    rerender: () => {
+      bridge.updateFt8Bar?.();
+      render();
+    },
+    // Oldest first, so the map builds the grids up in the order they were heard.
+    syncMap: () => {
+      for (const message of [...history].reverse()) plotLocator(message);
+    }
   });
   bridge.registerFt8FamilyBarRenderer?.(id, barFrames);
   const updatePeriod = () => {

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/chunk-S57W63QN.js

@@ -0,0 +1,18 @@
+import {
+  hostState
+} from "./chunk-KL66PICH.js";
+
+// src/plugins/active-rig.ts
+function isActiveRigDecode(rigId) {
+  const activeRigId = hostState.lastActiveRigId;
+  if (!activeRigId || !rigId) return true;
+  return rigId === activeRigId;
+}
+function forActiveRig(items) {
+  return items.filter((item) => isActiveRigDecode(item.rig_id));
+}
+
+export {
+  isActiveRigDecode,
+  forActiveRig
+};

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/cw.js

@@ -1,3 +1,6 @@
+import {
+  isActiveRigDecode
+} from "./chunk-S57W63QN.js";
 import {
   hostCore
 } from "./chunk-KL66PICH.js";
@@ -25,7 +28,7 @@ var CW_BAR_LINE_GAP_MS = 5e3;
 var cwLastAppendTime = 0;
 var cwTonePickerRaf = null;
 var cwBarHistory = [];
-var cwBarCurrentLine = null;
+var cwBarCurrentLines = /* @__PURE__ */ new Map();
 var cwBarDismissedAtMs = 0;
 var cwAutoLocalOverride = null;
 function escapeCwHtml(input) {
@@ -50,20 +53,22 @@ cwWindow.applyCwAutoUiFromServer = function(enabled) {
   if (cwAutoLocalOverride !== null) return;
   applyCwAutoUi(enabled);
 };
-function cwBarFlushCurrentLine() {
+function cwBarFlushCurrentLine(key) {
-  if (cwBarCurrentLine && cwBarCurrentLine.text.trim()) {
+  const line = cwBarCurrentLines.get(key);
-    cwBarHistory.unshift(cwBarCurrentLine);
+  cwBarCurrentLines.delete(key);
+  if (line?.text.trim()) {
+    cwBarHistory.unshift(line);
     if (cwBarHistory.length > 50) cwBarHistory.length = 50;
   }
-  cwBarCurrentLine = null;
 }
 function updateCwBar() {
   if (!cwBarOverlay) return;
   const mode = (document.getElementById("mode")?.value || "").toUpperCase();
   const isCw = mode === "CW" || mode === "CWR";
   const cutoffMs = Date.now() - CW_BAR_WINDOW_MS;
-  const recent = cwBarHistory.filter((l) => l.tsMs >= cutoffMs);
+  const recent = cwBarHistory.filter((l) => l.tsMs >= cutoffMs && isActiveRigDecode(l.rigId));
-  const liveLines = cwBarCurrentLine && cwBarCurrentLine.text ? [cwBarCurrentLine, ...recent] : recent;
+  const inProgress = [...cwBarCurrentLines.values()].filter((l) => l.text && isActiveRigDecode(l.rigId)).sort((a, b) => b.tsMs - a.tsMs);
+  const liveLines = [...inProgress, ...recent];
   const newestTsMs = liveLines.reduce((latest, line) => Math.max(latest, line.tsMs || 0), 0);
   if (!isCw || liveLines.length === 0 || newestTsMs <= cwBarDismissedAtMs) {
     cwBarOverlay.style.display = "none";
@@ -308,7 +313,7 @@ function resetCwHistoryView() {
   if (cwOutputEl) cwOutputEl.innerHTML = "";
   cwLastAppendTime = 0;
   cwBarHistory = [];
-  cwBarCurrentLine = null;
+  cwBarCurrentLines.clear();
   updateCwBar();
   drawCwTonePicker();
 }
@@ -324,8 +329,9 @@ document.getElementById("settings-clear-cw-history")?.addEventListener("click",
   })();
 });
 function onServerCw(evt) {
-  if (cwStatusEl) cwStatusEl.textContent = "Receiving";
+  const forSelectedRig = isActiveRigDecode(evt.rig_id ?? null);
-  if (evt.text && cwOutputEl) {
+  if (cwStatusEl && forSelectedRig) cwStatusEl.textContent = "Receiving";
+  if (evt.text && cwOutputEl && forSelectedRig) {
     const now = Date.now();
     if (!cwOutputEl.lastElementChild || now - cwLastAppendTime > 1e4 || evt.text === "\n") {
       const line = document.createElement("div");
@@ -346,25 +352,29 @@ function onServerCw(evt) {
   }
   if (evt.text) {
     const now = Date.now();
+    const rigId = evt.rig_id ?? null;
+    const key = rigId ?? "";
     if (evt.text === "\n") {
-      cwBarFlushCurrentLine();
+      cwBarFlushCurrentLine(key);
     } else {
-      if (!cwBarCurrentLine || now - cwBarCurrentLine.lastMs > CW_BAR_LINE_GAP_MS) {
+      let line = cwBarCurrentLines.get(key);
-        cwBarFlushCurrentLine();
+      if (!line || now - line.lastMs > CW_BAR_LINE_GAP_MS) {
+        cwBarFlushCurrentLine(key);
         const ts = new Date(now).toLocaleTimeString([], { hour: "2-digit", minute: "2-digit", second: "2-digit" });
-        cwBarCurrentLine = { tsMs: now, ts, text: "", wpm: null, tone_hz: null, lastMs: now };
+        line = { rigId, tsMs: now, ts, text: "", wpm: null, tone_hz: null, lastMs: now };
+        cwBarCurrentLines.set(key, line);
       }
-      cwBarCurrentLine.text += evt.text;
+      line.text += evt.text;
-      cwBarCurrentLine.lastMs = now;
+      line.lastMs = now;
-      if (Number.isFinite(Number(evt.wpm))) cwBarCurrentLine.wpm = clampCwWpm(evt.wpm);
+      if (Number.isFinite(Number(evt.wpm))) line.wpm = clampCwWpm(evt.wpm);
-      if (Number.isFinite(Number(evt.tone_hz))) cwBarCurrentLine.tone_hz = Math.round(Number(evt.tone_hz));
+      if (Number.isFinite(Number(evt.tone_hz))) line.tone_hz = Math.round(Number(evt.tone_hz));
     }
     updateCwBar();
   }
-  if (cwSignalIndicator) {
+  if (cwSignalIndicator && forSelectedRig) {
     cwSignalIndicator.className = evt.signal_on ? "cw-signal-on" : "cw-signal-off";
   }
-  if (!cwAutoInput || cwAutoInput.checked) {
+  if (forSelectedRig && (!cwAutoInput || cwAutoInput.checked)) {
     if (cwWpmInput && Number.isFinite(Number(evt.wpm))) {
       cwWpmInput.value = String(clampCwWpm(evt.wpm));
     }
@@ -389,7 +399,14 @@ cwWindow.trxPluginRuntime.registerDecoder({
   id: "cw",
   onMessage: onServerCw,
   restore: restoreCwHistory,
-  reset: resetCwHistoryView
+  reset: resetCwHistoryView,
+  // The copied text of a rig that is no longer on screen cannot be unpicked
+  // from the pane, so the switch starts the new rig's stream from empty.
+  rerender: () => {
+    if (cwOutputEl) cwOutputEl.innerHTML = "";
+    cwLastAppendTime = 0;
+    updateCwBar();
+  }
 });
 cwWindow.refreshCwTonePicker = function refreshCwTonePicker() {
   ensureCwToneCanvasResolution();

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/ft2.js

@@ -1,6 +1,7 @@
 import {
   initializeFtxDecoder
-} from "./chunk-O2Y7YEVQ.js";
+} from "./chunk-PJ5Q7CWJ.js";
+import "./chunk-S57W63QN.js";
 import "./chunk-KL66PICH.js";
 
 // src/plugins/ft2.ts

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/ft4.js

@@ -1,6 +1,7 @@
 import {
   initializeFtxDecoder
-} from "./chunk-O2Y7YEVQ.js";
+} from "./chunk-PJ5Q7CWJ.js";
+import "./chunk-S57W63QN.js";
 import "./chunk-KL66PICH.js";
 
 // src/plugins/ft4.ts

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/ft8.js

@@ -2,7 +2,8 @@ import {
   initializeFt8FamilyBar,
   initializeFtxDecoder,
   installFtxCompatibilityHelpers
-} from "./chunk-O2Y7YEVQ.js";
+} from "./chunk-PJ5Q7CWJ.js";
+import "./chunk-S57W63QN.js";
 import "./chunk-KL66PICH.js";
 
 // src/plugins/ft8.ts

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/hf-aprs.js

@@ -5,6 +5,10 @@ import {
   normalizeAprsPacket,
   renderAprsPacketRow
 } from "./chunk-OPEIVJGD.js";
+import {
+  forActiveRig,
+  isActiveRigDecode
+} from "./chunk-S57W63QN.js";
 import {
   hostCore,
   hostState
@@ -67,21 +71,26 @@ function hfAprsFilterMatch(pkt) {
   ].filter(Boolean).join(" ").toUpperCase();
   return haystack.includes(hfAprsFilterText);
 }
+function hfAprsRigPackets() {
+  return forActiveRig(hfAprsPacketHistory);
+}
 function hfAprsVisiblePackets() {
-  const packets = hfAprsCollapseDup ? collapseHfAprsDuplicates(hfAprsPacketHistory) : hfAprsPacketHistory;
+  const rigPackets = hfAprsRigPackets();
+  const packets = hfAprsCollapseDup ? collapseHfAprsDuplicates(rigPackets) : rigPackets;
   return packets.filter(hfAprsFilterMatch);
 }
 var collapseHfAprsDuplicates = collapseAprsDuplicates;
 function updateHfAprsSummary() {
+  const rigPackets = hfAprsRigPackets();
   const visible = hfAprsVisiblePackets();
   if (hfAprsTotalCountEl) {
-    hfAprsTotalCountEl.textContent = `${hfAprsPacketHistory.length} total`;
+    hfAprsTotalCountEl.textContent = `${rigPackets.length} total`;
   }
   if (hfAprsVisibleCountEl) {
     hfAprsVisibleCountEl.textContent = `${visible.length} shown`;
   }
   if (hfAprsLatestSeenEl) {
-    const latest = hfAprsPacketHistory[0];
+    const latest = rigPackets[0];
     if (!latest) {
       hfAprsLatestSeenEl.textContent = "No packets yet";
     } else {
@@ -140,17 +149,32 @@ function resetHfAprsHistoryView() {
   if (hfAprsPacketsEl) hfAprsPacketsEl.innerHTML = "";
   hfAprsPacketHistory = [];
   renderHfAprsHistory();
+  hfAprsWindow.clearMapMarkersByType?.("hf_aprs");
 }
 function pruneHfAprsHistoryView() {
   pruneHfAprsPacketHistory();
   renderHfAprsHistory();
 }
+function plotHfAprsPacket(pkt) {
+  if (pkt.lat == null || pkt.lon == null || !hfAprsWindow.aprsMapAddStation) return;
+  hfAprsWindow.aprsMapAddStation(
+    pkt.srcCall ?? "",
+    pkt.lat,
+    pkt.lon,
+    pkt.info ?? "",
+    pkt.symbolTable,
+    pkt.symbolCode,
+    pkt,
+    "hf_aprs"
+  );
+}
 function addHfAprsPacket(pkt) {
   const tsMs = Number.isFinite(pkt.ts_ms) ? Number(pkt.ts_ms) : Date.now();
   pkt._tsMs = tsMs;
   pkt._ts = new Date(tsMs).toLocaleTimeString([], { hour: "2-digit", minute: "2-digit", second: "2-digit" });
   hfAprsPacketHistory.unshift(pkt);
   pruneHfAprsPacketHistory();
+  plotHfAprsPacket(pkt);
   scheduleHfAprsHistoryRender();
 }
 function normalizeServerHfAprsPacket(pkt) {
@@ -158,13 +182,14 @@ function normalizeServerHfAprsPacket(pkt) {
 }
 function onServerHfAprsBatch(packets) {
   if (!Array.isArray(packets) || packets.length === 0) return;
-  if (hfAprsStatus) hfAprsStatus.textContent = "Receiving";
   const normalized = [];
   for (const pkt of packets) {
     const next = normalizeServerHfAprsPacket(pkt);
+    if (hfAprsStatus && isActiveRigDecode(next.rig_id)) hfAprsStatus.textContent = "Receiving";
     const tsMs = Number.isFinite(next.ts_ms) ? Number(next.ts_ms) : Date.now();
     next._tsMs = tsMs;
     next._ts = new Date(tsMs).toLocaleTimeString([], { hour: "2-digit", minute: "2-digit", second: "2-digit" });
+    plotHfAprsPacket(next);
     normalized.push(next);
   }
   normalized.reverse();
@@ -227,8 +252,9 @@ if (hfAprsFilterInput) {
   });
 }
 function onServerHfAprs(pkt) {
-  if (hfAprsStatus) hfAprsStatus.textContent = "Receiving";
+  const packet = normalizeServerHfAprsPacket(pkt);
-  addHfAprsPacket(normalizeServerHfAprsPacket(pkt));
+  if (hfAprsStatus && isActiveRigDecode(packet.rig_id)) hfAprsStatus.textContent = "Receiving";
+  addHfAprsPacket(packet);
 }
 renderHfAprsHistory();
 window.trxPluginRuntime.registerDecoder({
@@ -237,5 +263,10 @@ window.trxPluginRuntime.registerDecoder({
   onBatch: onServerHfAprsBatch,
   restore: onServerHfAprsBatch,
   reset: resetHfAprsHistoryView,
-  prune: pruneHfAprsHistoryView
+  prune: pruneHfAprsHistoryView,
+  rerender: renderHfAprsHistory,
+  // Oldest first, so station tracks are rebuilt in the order they happened.
+  syncMap: () => {
+    for (const entry of [...hfAprsPacketHistory].reverse()) plotHfAprsPacket(entry);
+  }
 });

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/map-core.js

@@ -60,7 +60,7 @@ var mapWindow = window;
   const decodeContactPaths = /* @__PURE__ */ new Map();
   let selectedMapQsoKey = null;
   const mapMarkers = /* @__PURE__ */ new Set();
-  const DEFAULT_MAP_SOURCE_FILTER = { ais: true, vdes: true, aprs: true, bookmark: false, ft8: true, ft4: true, ft2: true, wspr: true, sat: false };
+  const DEFAULT_MAP_SOURCE_FILTER = { ais: true, vdes: true, aprs: true, hf_aprs: true, bookmark: false, ft8: true, ft4: true, ft2: true, wspr: true, sat: false };
   const mapFilter = { ...DEFAULT_MAP_SOURCE_FILTER };
   const MAP_FILTER_ALL_KEY = "__all";
   const mapLocatorFilter = { phase: "band", bands: /* @__PURE__ */ new Set() };
@@ -128,6 +128,12 @@ var mapWindow = window;
     }
     return trimmed;
   }
+  function aprsEntrySource(entry) {
+    return entry?.type === "hf_aprs" ? "hf_aprs" : "aprs";
+  }
+  function aprsStationKey(call, source) {
+    return source === "aprs" ? call : `${source}:${call}`;
+  }
   function refreshAprsTrack(call, entry) {
     if (!entry) return;
     if (!Array.isArray(entry.trackPoints) || entry.trackPoints.length < 2) {
@@ -149,7 +155,7 @@ var mapWindow = window;
       lineJoin: "round",
       interactive: false
     });
-    track.__trxType = "aprs";
+    track.__trxType = aprsEntrySource(entry);
     track._aprsCall = call;
     entry.track = track;
   }
@@ -381,6 +387,7 @@ var mapWindow = window;
   }
   function mapSourceLabel(type) {
     if (type === "bookmark") return "Bookmarks";
+    if (type === "hf_aprs") return "HF APRS";
     return String(type || "").toUpperCase();
   }
   function locatorFilterColor(type) {
@@ -396,6 +403,7 @@ var mapWindow = window;
     if (type === "vdes") return "#a78bfa";
     if (type === "sat") return "#f59e0b";
     if (type === "aprs") return "#00d17f";
+    if (type === "hf_aprs") return "#fb7185";
     return locatorFilterColor(type);
   }
   function bandForHz(hz) {
@@ -931,10 +939,8 @@ var mapWindow = window;
       }
     }
     for (const entry of stationMarkers.values()) {
-      if (entry?.type === "aprs" && entry?.visibleInHistoryWindow) {
+      if (!entry?.visibleInHistoryWindow) continue;
-        availableSources.add("aprs");
+      availableSources.add(aprsEntrySource(entry));
-        break;
-      }
     }
     const bandMap = /* @__PURE__ */ new Map();
     for (const entry of locatorMarkers.values()) {
@@ -966,7 +972,7 @@ var mapWindow = window;
     for (const key of Array.from(mapLocatorFilter.bands)) {
       if (!bandMap.has(key)) mapLocatorFilter.bands.delete(key);
     }
-    const sourceItems = ["ais", "vdes", "aprs", "bookmark", "ft8", "ft4", "ft2", "wspr"].filter((key) => availableSources.has(key)).map((key) => ({
+    const sourceItems = ["ais", "vdes", "aprs", "hf_aprs", "bookmark", "ft8", "ft4", "ft2", "wspr"].filter((key) => availableSources.has(key)).map((key) => ({
       key,
       label: mapSourceLabel(key),
       color: mapSourceColor(key),
@@ -1028,9 +1034,10 @@ var mapWindow = window;
       }
       return parts.join(" ").toLowerCase();
     }
-    if (type === "aprs") {
+    if (type === "aprs" || type === "hf_aprs") {
-      const call = marker?._aprsCall ? String(marker._aprsCall) : "";
+      const key = marker?._aprsCall ? String(marker._aprsCall) : "";
-      const entry = stationMarkers.get(call);
+      const entry = stationMarkers.get(key);
+      const call = entry?.call ?? key;
       const info = entry?.info ? String(entry.info) : "";
       const pktRaw = entry?.pkt?.raw ? String(entry.pkt.raw) : "";
       return `${call} ${info} ${pktRaw}`.toLowerCase();
@@ -1200,9 +1207,10 @@ var mapWindow = window;
     }
   };
   mapWindow.clearMapMarkersByType = function(type) {
-    if (type === "aprs") {
+    if (type === "aprs" || type === "hf_aprs") {
       selectedAprsTrackCall = null;
-      stationMarkers.forEach((entry) => {
+      stationMarkers.forEach((entry, key) => {
+        if (aprsEntrySource(entry) !== type) return;
         if (entry && entry.marker) {
           if (aprsMap && aprsMap.hasLayer(entry.marker)) entry.marker.removeFrom(aprsMap);
           mapMarkers.delete(entry.marker);
@@ -1211,8 +1219,8 @@ var mapWindow = window;
           if (aprsMap && aprsMap.hasLayer(entry.track)) entry.track.removeFrom(aprsMap);
           mapMarkers.delete(entry.track);
         }
+        stationMarkers.delete(key);
       });
-      stationMarkers.clear();
       return;
     }
     if (type === "ais") {
@@ -1448,13 +1456,15 @@ var mapWindow = window;
         if (!ll) return;
         const entry = stationMarkers.get(marker._aprsCall);
         if (!entry) return;
-        e.popup.setContent(buildAprsPopupHtml(marker._aprsCall, ll.lat, ll.lng, entry.info || "", entry.pkt));
+        const source = aprsEntrySource(entry);
+        const call = entry.call ?? String(marker._aprsCall);
+        e.popup.setContent(buildAprsPopupHtml(call, ll.lat, ll.lng, entry.info || "", entry.pkt));
         refreshAprsTrack(String(marker._aprsCall), entry);
-        if (entry.track && aprsMap && mapFilter.aprs && !aprsMap.hasLayer(entry.track)) {
+        if (entry.track && aprsMap && mapFilter[source] && !aprsMap.hasLayer(entry.track)) {
           entry.track.addTo(aprsMap);
         }
         selectedAprsTrackCall = String(marker._aprsCall);
-        setMapRadioPathTo(ll.lat, ll.lng, mapSourceColor("aprs"), "aprs-radio-path", marker.__trxRigIds);
+        setMapRadioPathTo(ll.lat, ll.lng, mapSourceColor(source), "aprs-radio-path", marker.__trxRigIds);
         return;
       }
       if (marker._aisMmsi) {
@@ -1848,28 +1858,33 @@ var mapWindow = window;
     }
     return null;
   }
-  function _aprsAddMarkerToMap(call, entry) {
+  function _aprsAddMarkerToMap(key, entry) {
     if (!aprsMap || entry.lat == null || entry.lon == null) return;
-    refreshAprsTrack(call, entry);
+    refreshAprsTrack(key, entry);
+    const source = aprsEntrySource(entry);
+    const call = entry.call ?? key;
     const icon = aprsSymbolIcon(entry.symbolTable ?? "", entry.symbolCode ?? "");
     const popupContent = buildAprsPopupHtml(call, entry.lat, entry.lon, entry.info || "", entry.pkt);
+    const color = mapSourceColor(source);
     const marker = icon ? L.marker([entry.lat, entry.lon], { icon }).addTo(aprsMap).bindPopup(popupContent) : L.circleMarker([entry.lat, entry.lon], {
       radius: 6,
-      color: "#00d17f",
+      color,
-      fillColor: "#00d17f",
+      fillColor: color,
       fillOpacity: 0.8
     }).addTo(aprsMap).bindPopup(popupContent);
-    marker.__trxType = "aprs";
+    marker.__trxType = source;
     marker.__trxRigIds = entry.rigIds || /* @__PURE__ */ new Set();
-    marker._aprsCall = call;
+    marker._aprsCall = key;
     entry.marker = marker;
     mapMarkers.add(marker);
   }
-  mapWindow.aprsMapAddStation = function(call, lat, lon, info, symbolTable, symbolCode, pkt) {
+  mapWindow.aprsMapAddStation = function(call, lat, lon, info, symbolTable, symbolCode, pkt, source) {
     const nextPoint = [lat, lon];
     const tsMs = Number.isFinite(pkt?._tsMs) ? Number(pkt._tsMs) : Date.now();
     const msgRigId = pkt?.rig_id || T.lastActiveRigId;
-    const existing = stationMarkers.get(call);
+    const stationSource = source === "hf_aprs" ? "hf_aprs" : "aprs";
+    const key = aprsStationKey(call, stationSource);
+    const existing = stationMarkers.get(key);
     if (existing) {
       existing.pkt = pkt;
       existing.lat = lat;
@@ -1888,7 +1903,8 @@ var mapWindow = window;
       } else if (prevPoint) {
         prevPoint.tsMs = tsMs;
       }
-      pruneAprsEntry(call, existing, mapHistoryCutoffMs());
+      existing.call = call;
+      pruneAprsEntry(key, existing, mapHistoryCutoffMs());
       if (aprsMap && existing.marker && !T.decodeHistoryReplayActive) {
         existing.marker.setLatLng([lat, lon]);
         existing.marker.setPopupContent(buildAprsPopupHtml(call, lat, lon, info, pkt));
@@ -1899,7 +1915,8 @@ var mapWindow = window;
         track: null,
         trackHistory: [{ lat, lon, tsMs }],
         trackPoints: [nextPoint],
-        type: "aprs",
+        type: stationSource,
+        call,
         pkt,
         lat,
         lon,
@@ -1908,9 +1925,9 @@ var mapWindow = window;
         symbolCode,
         rigIds: new Set(msgRigId ? [msgRigId] : [])
       };
-      stationMarkers.set(call, entry);
+      stationMarkers.set(key, entry);
-      pruneAprsEntry(call, entry, mapHistoryCutoffMs());
+      pruneAprsEntry(key, entry, mapHistoryCutoffMs());
-      if (entry.visibleInHistoryWindow) ensureAprsMarker(call, entry);
+      if (entry.visibleInHistoryWindow) ensureAprsMarker(key, entry);
       if (aprsMap) scheduleDecodeMapMaintenance();
     }
   };

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/sat.js

@@ -8,7 +8,6 @@ var satDom = {
   status: document.getElementById("sat-status"),
   liveView: document.getElementById("sat-live-view"),
   historyView: document.getElementById("sat-history-view"),
-  predictionsView: document.getElementById("sat-predictions-view"),
   liveLatest: document.getElementById("sat-live-latest"),
   historyList: document.getElementById("sat-history-list"),
   historyCount: document.getElementById("sat-history-count"),
@@ -17,29 +16,12 @@ var satDom = {
   typeFilter: document.getElementById("sat-type-filter"),
   lrptState: document.getElementById("sat-lrpt-state"),
   viewLiveBtn: document.getElementById("sat-view-live"),
-  viewHistoryBtn: document.getElementById("sat-view-history"),
+  viewHistoryBtn: document.getElementById("sat-view-history")
-  viewPredBtn: document.getElementById("sat-view-predictions"),
-  predFilter: document.getElementById("sat-pred-filter"),
-  predMinEl: document.getElementById("sat-pred-min-el"),
-  predCategory: document.getElementById("sat-pred-category"),
-  predCurrentList: document.getElementById("sat-pred-current-list"),
-  predUpcomingList: document.getElementById("sat-pred-list"),
-  predCurrentSec: document.getElementById("sat-pred-current-section"),
-  predUpcomingSec: document.getElementById("sat-pred-upcoming-section"),
-  predStatus: document.getElementById("sat-pred-status")
 };
 var satImageHistory = [];
 var SAT_MAX_IMAGES = 100;
-var SAT_PRED_PAGE_SIZE = 50;
-var satPredShowAll = false;
 var satFilterText = "";
 var satActiveView = "live";
-var satPredData = [];
-var satPredFilterText = "";
-var satPredMinEl = 0;
-var satPredCategory = "all";
-var satPredSatCount = 0;
-var satPredCountdownTimer = null;
 function scheduleSatUi(key, job) {
   if (typeof satWindow.trxScheduleUiFrameJob === "function") {
     satWindow.trxScheduleUiFrameJob(key, job);
@@ -48,37 +30,19 @@ function scheduleSatUi(key, job) {
   job();
 }
 function switchSatView(view) {
-  const leavingPredictions = satActiveView === "predictions" && view !== "predictions";
   satActiveView = view;
   if (satDom.liveView) satDom.liveView.style.display = view === "live" ? "" : "none";
   if (satDom.historyView) satDom.historyView.style.display = view === "history" ? "" : "none";
-  if (satDom.predictionsView) satDom.predictionsView.style.display = view === "predictions" ? "" : "none";
   if (satDom.viewLiveBtn) satDom.viewLiveBtn.classList.toggle("sat-view-active", view === "live");
   if (satDom.viewHistoryBtn) satDom.viewHistoryBtn.classList.toggle("sat-view-active", view === "history");
-  if (satDom.viewPredBtn) satDom.viewPredBtn.classList.toggle("sat-view-active", view === "predictions");
+  if (view === "history") renderSatHistoryTable();
-  if (leavingPredictions) clearPredictionDom();
-  if (view === "history") {
-    renderSatHistoryTable();
-  } else if (view === "predictions") {
-    satPredShowAll = false;
-    void loadSatPredictions();
-  }
 }
-function clearPredictionDom() {
-  stopCountdownTimer();
-  if (satDom.predCurrentList) satDom.predCurrentList.innerHTML = "";
-  if (satDom.predUpcomingList) satDom.predUpcomingList.innerHTML = "";
-}
-satWindow.clearSatPredictionDom = clearPredictionDom;
 satDom.viewLiveBtn?.addEventListener("click", () => {
   switchSatView("live");
 });
 satDom.viewHistoryBtn?.addEventListener("click", () => {
   switchSatView("history");
 });
-satDom.viewPredBtn?.addEventListener("click", () => {
-  switchSatView("predictions");
-});
 var lastSatLrptOn = null;
 satWindow.updateSatLiveState = function(update) {
   if (!satDom.lrptState) return;
@@ -275,200 +239,6 @@ document.getElementById("settings-clear-sat-history")?.addEventListener("click",
     }
   })();
 });
-function azToCardinal(deg) {
-  const dirs = ["N", "NE", "E", "SE", "S", "SW", "W", "NW"];
-  return dirs[Math.round(deg / 45) % 8] ?? "N";
-}
-function formatPredTime(ms) {
-  const d = new Date(ms);
-  const now = /* @__PURE__ */ new Date();
-  const dayNames = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
-  const day = d.getUTCDay() !== now.getUTCDay() ? `${dayNames[d.getUTCDay()] ?? ""} ` : "";
-  const hh = String(d.getUTCHours()).padStart(2, "0");
-  const mm = String(d.getUTCMinutes()).padStart(2, "0");
-  return `${day}${hh}:${mm}`;
-}
-function formatPredDuration(s) {
-  if (s >= 60) return `${Math.round(s / 60)} min`;
-  return `${s}s`;
-}
-function formatCountdown(ms) {
-  const totalSec = Math.max(0, Math.floor(ms / 1e3));
-  const m = Math.floor(totalSec / 60);
-  const s = totalSec % 60;
-  return `${m}:${String(s).padStart(2, "0")}`;
-}
-function elevationClass(deg) {
-  if (deg >= 45) return "sat-pred-el-high";
-  if (deg >= 10) return "sat-pred-el-mid";
-  return "sat-pred-el-low";
-}
-function stopCountdownTimer() {
-  if (satPredCountdownTimer) {
-    clearInterval(satPredCountdownTimer);
-    satPredCountdownTimer = null;
-  }
-}
-function startCountdownTimer(container) {
-  const countdownEls = container?.querySelectorAll(".sat-pred-col-countdown") ?? [];
-  if (countdownEls.length === 0) return;
-  satPredCountdownTimer = setInterval(() => {
-    if (satActiveView !== "predictions") {
-      stopCountdownTimer();
-      return;
-    }
-    const n = Date.now();
-    let anyActive = false;
-    for (const el of countdownEls) {
-      const los = Number.parseInt(el.dataset.los ?? "0", 10);
-      const rem = los - n;
-      if (rem > 0) {
-        el.textContent = formatCountdown(rem);
-        anyActive = true;
-      } else {
-        el.textContent = "0:00";
-      }
-    }
-    if (!anyActive) {
-      stopCountdownTimer();
-      renderSatPredictions(getFilteredPredictions());
-    }
-  }, 1e3);
-}
-function buildCurrentPassRow(pass, now) {
-  const row = document.createElement("div");
-  row.className = "sat-pred-row-current";
-  const dir = `${azToCardinal(pass.azimuth_aos_deg)} → ${azToCardinal(pass.azimuth_los_deg)}`;
-  const remaining = Math.max(0, pass.los_ms - now);
-  row.innerHTML = [
-    `<span class="sat-pred-col-sat">${pass.satellite}</span>`,
-    `<span class="sat-pred-col-el ${elevationClass(pass.max_elevation_deg)}">${pass.max_elevation_deg.toFixed(1)}°</span>`,
-    `<span class="sat-pred-col-time">${formatPredTime(pass.aos_ms)}</span>`,
-    `<span class="sat-pred-col-time">${formatPredTime(pass.los_ms)}</span>`,
-    `<span class="sat-pred-col-countdown" data-los="${pass.los_ms}">${formatCountdown(remaining)}</span>`,
-    `<span class="sat-pred-col-dir">${dir}</span>`
-  ].join("");
-  return row;
-}
-function buildUpcomingPassRow(pass) {
-  const row = document.createElement("div");
-  row.className = "sat-pred-row";
-  const dir = `${azToCardinal(pass.azimuth_aos_deg)} → ${azToCardinal(pass.azimuth_los_deg)}`;
-  row.innerHTML = [
-    `<span class="sat-pred-col-time">${formatPredTime(pass.aos_ms)}</span>`,
-    `<span class="sat-pred-col-sat">${pass.satellite}</span>`,
-    `<span class="sat-pred-col-el ${elevationClass(pass.max_elevation_deg)}">${pass.max_elevation_deg.toFixed(1)}°</span>`,
-    `<span class="sat-pred-col-dur">${formatPredDuration(pass.duration_s)}</span>`,
-    `<span class="sat-pred-col-dir">${dir}</span>`
-  ].join("");
-  return row;
-}
-function getFilteredPredictions() {
-  let items = satPredData;
-  if (satPredCategory !== "all") items = items.filter((p) => p.category === satPredCategory);
-  if (satPredMinEl > 0) items = items.filter((p) => p.max_elevation_deg >= satPredMinEl);
-  if (satPredFilterText) items = items.filter((p) => p.satellite.toUpperCase().includes(satPredFilterText));
-  return items;
-}
-function applyPredFilters() {
-  renderSatPredictions(getFilteredPredictions());
-}
-var satPredictionFilter = satDom.predFilter;
-satPredictionFilter?.addEventListener("input", () => {
-  satPredFilterText = satPredictionFilter.value.trim().toUpperCase();
-  applyPredFilters();
-});
-var satPredictionMinElevation = satDom.predMinEl;
-satPredictionMinElevation?.addEventListener("change", () => {
-  satPredMinEl = Number.parseInt(satPredictionMinElevation.value, 10) || 0;
-  applyPredFilters();
-});
-var satPredictionCategory = satDom.predCategory;
-satPredictionCategory?.addEventListener("change", () => {
-  satPredCategory = satPredictionCategory.value;
-  applyPredFilters();
-});
-function renderSatPredictions(passes, error) {
-  stopCountdownTimer();
-  if (error) {
-    if (satDom.predCurrentList) satDom.predCurrentList.innerHTML = "";
-    if (satDom.predUpcomingList) satDom.predUpcomingList.innerHTML = "";
-    if (satDom.predCurrentSec) satDom.predCurrentSec.style.display = "none";
-    if (satDom.predUpcomingSec) satDom.predUpcomingSec.style.display = "none";
-    if (satDom.predStatus) satDom.predStatus.textContent = error;
-    return;
-  }
-  if (!Array.isArray(passes) || passes.length === 0) {
-    if (satDom.predCurrentList) satDom.predCurrentList.innerHTML = "";
-    if (satDom.predUpcomingList) satDom.predUpcomingList.innerHTML = "";
-    if (satDom.predCurrentSec) satDom.predCurrentSec.style.display = "none";
-    if (satDom.predUpcomingSec) satDom.predUpcomingSec.style.display = "none";
-    if (satDom.predStatus) satDom.predStatus.textContent = "No passes found in the next 24 hours.";
-    return;
-  }
-  const now = Date.now();
-  const current = passes.filter((p) => p.aos_ms <= now && p.los_ms > now);
-  const upcoming = passes.filter((p) => p.aos_ms > now);
-  if (satDom.predCurrentSec) satDom.predCurrentSec.style.display = current.length > 0 ? "" : "none";
-  if (satDom.predCurrentList) {
-    if (current.length === 0) {
-      satDom.predCurrentList.innerHTML = "";
-    } else {
-      const frag = document.createDocumentFragment();
-      for (const pass of current) frag.appendChild(buildCurrentPassRow(pass, now));
-      satDom.predCurrentList.replaceChildren(frag);
-    }
-  }
-  const upcomingLimit = satPredShowAll ? upcoming.length : SAT_PRED_PAGE_SIZE;
-  const visibleUpcoming = upcoming.slice(0, upcomingLimit);
-  const hiddenCount = upcoming.length - visibleUpcoming.length;
-  if (satDom.predUpcomingSec) satDom.predUpcomingSec.style.display = upcoming.length > 0 ? "" : "none";
-  if (satDom.predUpcomingList) {
-    const frag = document.createDocumentFragment();
-    for (const pass of visibleUpcoming) frag.appendChild(buildUpcomingPassRow(pass));
-    if (hiddenCount > 0) {
-      const moreRow = document.createElement("div");
-      moreRow.className = "sat-pred-row";
-      moreRow.style.cursor = "pointer";
-      moreRow.style.textAlign = "center";
-      moreRow.innerHTML = `<span style="grid-column:1/-1;color:var(--accent);font-size:0.82rem;">Show ${hiddenCount} more passes…</span>`;
-      moreRow.addEventListener("click", () => {
-        satPredShowAll = true;
-        renderSatPredictions(getFilteredPredictions());
-      });
-      frag.appendChild(moreRow);
-    }
-    satDom.predUpcomingList.replaceChildren(frag);
-  }
-  if (satDom.predStatus) {
-    let text = `${current.length} active · ${upcoming.length} upcoming · times in UTC`;
-    if (satPredSatCount > 0) text += ` · ${satPredSatCount} satellites tracked`;
-    satDom.predStatus.textContent = text;
-  }
-  if (current.length > 0 && satActiveView === "predictions") {
-    startCountdownTimer(satDom.predCurrentList);
-  }
-}
-async function loadSatPredictions() {
-  if (satDom.predStatus) satDom.predStatus.textContent = "Loading predictions…";
-  if (satDom.predCurrentList) satDom.predCurrentList.innerHTML = "";
-  if (satDom.predUpcomingList) satDom.predUpcomingList.innerHTML = "";
-  try {
-    const resp = await fetch("/sat_passes");
-    if (!resp.ok) throw new Error(`HTTP ${resp.status}`);
-    const data = await resp.json();
-    satPredSatCount = data.satellite_count || 0;
-    if (data.error) {
-      satPredData = [];
-      renderSatPredictions([], data.error);
-    } else {
-      satPredData = data.passes || [];
-      renderSatPredictions(getFilteredPredictions());
-    }
-  } catch (error) {
-    renderSatPredictions([], `Failed to load predictions: ${error instanceof Error ? error.message : String(error)}`);
-  }
-}
 satWindow.satShowOnMap = function(south, west, north, east) {
   if (typeof satWindow.enableMapSourceFilter === "function") {
     satWindow.enableMapSourceFilter("sat");

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/satellite-predictions.js

@@ -0,0 +1,228 @@
+// src/plugins/satellite-predictions.ts
+var predWindow = window;
+var dom = {
+  page: document.getElementById("tab-satellites"),
+  filter: document.getElementById("sat-pred-filter"),
+  minElevation: document.getElementById("sat-pred-min-el"),
+  category: document.getElementById("sat-pred-category"),
+  currentList: document.getElementById("sat-pred-current-list"),
+  upcomingList: document.getElementById("sat-pred-list"),
+  currentSection: document.getElementById("sat-pred-current-section"),
+  upcomingSection: document.getElementById("sat-pred-upcoming-section"),
+  status: document.getElementById("sat-pred-status")
+};
+var PAGE_SIZE = 50;
+var predShowAll = false;
+var predData = [];
+var predFilterText = "";
+var predMinEl = 0;
+var predCategory = "all";
+var predSatCount = 0;
+var predCountdownTimer = null;
+function isPageVisible() {
+  return !!dom.page && dom.page.style.display !== "none";
+}
+function azToCardinal(deg) {
+  const dirs = ["N", "NE", "E", "SE", "S", "SW", "W", "NW"];
+  return dirs[Math.round(deg / 45) % 8] ?? "N";
+}
+function formatPredTime(ms) {
+  const d = new Date(ms);
+  const now = /* @__PURE__ */ new Date();
+  const dayNames = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
+  const day = d.getUTCDay() !== now.getUTCDay() ? `${dayNames[d.getUTCDay()] ?? ""} ` : "";
+  const hh = String(d.getUTCHours()).padStart(2, "0");
+  const mm = String(d.getUTCMinutes()).padStart(2, "0");
+  return `${day}${hh}:${mm}`;
+}
+function formatPredDuration(s) {
+  if (s >= 60) return `${Math.round(s / 60)} min`;
+  return `${s}s`;
+}
+function formatCountdown(ms) {
+  const totalSec = Math.max(0, Math.floor(ms / 1e3));
+  const m = Math.floor(totalSec / 60);
+  const s = totalSec % 60;
+  return `${m}:${String(s).padStart(2, "0")}`;
+}
+function elevationClass(deg) {
+  if (deg >= 45) return "sat-pred-el-high";
+  if (deg >= 10) return "sat-pred-el-mid";
+  return "sat-pred-el-low";
+}
+function stopCountdownTimer() {
+  if (predCountdownTimer) {
+    clearInterval(predCountdownTimer);
+    predCountdownTimer = null;
+  }
+}
+function startCountdownTimer(container) {
+  const countdownEls = container?.querySelectorAll(".sat-pred-col-countdown") ?? [];
+  if (countdownEls.length === 0) return;
+  predCountdownTimer = setInterval(() => {
+    if (!isPageVisible()) {
+      stopCountdownTimer();
+      return;
+    }
+    const n = Date.now();
+    let anyActive = false;
+    for (const el of countdownEls) {
+      const los = Number.parseInt(el.dataset.los ?? "0", 10);
+      const rem = los - n;
+      if (rem > 0) {
+        el.textContent = formatCountdown(rem);
+        anyActive = true;
+      } else {
+        el.textContent = "0:00";
+      }
+    }
+    if (!anyActive) {
+      stopCountdownTimer();
+      render(filtered());
+    }
+  }, 1e3);
+}
+function buildCurrentPassRow(pass, now) {
+  const row = document.createElement("div");
+  row.className = "sat-pred-row-current";
+  const dir = `${azToCardinal(pass.azimuth_aos_deg)} → ${azToCardinal(pass.azimuth_los_deg)}`;
+  const remaining = Math.max(0, pass.los_ms - now);
+  row.innerHTML = [
+    `<span class="sat-pred-col-sat">${pass.satellite}</span>`,
+    `<span class="sat-pred-col-el ${elevationClass(pass.max_elevation_deg)}">${pass.max_elevation_deg.toFixed(1)}°</span>`,
+    `<span class="sat-pred-col-time">${formatPredTime(pass.aos_ms)}</span>`,
+    `<span class="sat-pred-col-time">${formatPredTime(pass.los_ms)}</span>`,
+    `<span class="sat-pred-col-countdown" data-los="${pass.los_ms}">${formatCountdown(remaining)}</span>`,
+    `<span class="sat-pred-col-dir">${dir}</span>`
+  ].join("");
+  return row;
+}
+function buildUpcomingPassRow(pass) {
+  const row = document.createElement("div");
+  row.className = "sat-pred-row";
+  const dir = `${azToCardinal(pass.azimuth_aos_deg)} → ${azToCardinal(pass.azimuth_los_deg)}`;
+  row.innerHTML = [
+    `<span class="sat-pred-col-time">${formatPredTime(pass.aos_ms)}</span>`,
+    `<span class="sat-pred-col-sat">${pass.satellite}</span>`,
+    `<span class="sat-pred-col-el ${elevationClass(pass.max_elevation_deg)}">${pass.max_elevation_deg.toFixed(1)}°</span>`,
+    `<span class="sat-pred-col-dur">${formatPredDuration(pass.duration_s)}</span>`,
+    `<span class="sat-pred-col-dir">${dir}</span>`
+  ].join("");
+  return row;
+}
+function filtered() {
+  let items = predData;
+  if (predCategory !== "all") items = items.filter((p) => p.category === predCategory);
+  if (predMinEl > 0) items = items.filter((p) => p.max_elevation_deg >= predMinEl);
+  if (predFilterText) items = items.filter((p) => p.satellite.toUpperCase().includes(predFilterText));
+  return items;
+}
+function applyFilters() {
+  render(filtered());
+}
+var filterInput = dom.filter;
+filterInput?.addEventListener("input", () => {
+  predFilterText = filterInput.value.trim().toUpperCase();
+  applyFilters();
+});
+var minElevationSelect = dom.minElevation;
+minElevationSelect?.addEventListener("change", () => {
+  predMinEl = Number.parseInt(minElevationSelect.value, 10) || 0;
+  applyFilters();
+});
+var categorySelect = dom.category;
+categorySelect?.addEventListener("change", () => {
+  predCategory = categorySelect.value;
+  applyFilters();
+});
+function render(passes, error) {
+  stopCountdownTimer();
+  if (error) {
+    if (dom.currentList) dom.currentList.innerHTML = "";
+    if (dom.upcomingList) dom.upcomingList.innerHTML = "";
+    if (dom.currentSection) dom.currentSection.style.display = "none";
+    if (dom.upcomingSection) dom.upcomingSection.style.display = "none";
+    if (dom.status) dom.status.textContent = error;
+    return;
+  }
+  if (!Array.isArray(passes) || passes.length === 0) {
+    if (dom.currentList) dom.currentList.innerHTML = "";
+    if (dom.upcomingList) dom.upcomingList.innerHTML = "";
+    if (dom.currentSection) dom.currentSection.style.display = "none";
+    if (dom.upcomingSection) dom.upcomingSection.style.display = "none";
+    if (dom.status) dom.status.textContent = "No passes found in the next 24 hours.";
+    return;
+  }
+  const now = Date.now();
+  const current = passes.filter((p) => p.aos_ms <= now && p.los_ms > now);
+  const upcoming = passes.filter((p) => p.aos_ms > now);
+  if (dom.currentSection) dom.currentSection.style.display = current.length > 0 ? "" : "none";
+  if (dom.currentList) {
+    if (current.length === 0) {
+      dom.currentList.innerHTML = "";
+    } else {
+      const frag = document.createDocumentFragment();
+      for (const pass of current) frag.appendChild(buildCurrentPassRow(pass, now));
+      dom.currentList.replaceChildren(frag);
+    }
+  }
+  const upcomingLimit = predShowAll ? upcoming.length : PAGE_SIZE;
+  const visibleUpcoming = upcoming.slice(0, upcomingLimit);
+  const hiddenCount = upcoming.length - visibleUpcoming.length;
+  if (dom.upcomingSection) dom.upcomingSection.style.display = upcoming.length > 0 ? "" : "none";
+  if (dom.upcomingList) {
+    const frag = document.createDocumentFragment();
+    for (const pass of visibleUpcoming) frag.appendChild(buildUpcomingPassRow(pass));
+    if (hiddenCount > 0) {
+      const moreRow = document.createElement("div");
+      moreRow.className = "sat-pred-row";
+      moreRow.style.cursor = "pointer";
+      moreRow.style.textAlign = "center";
+      moreRow.innerHTML = `<span style="grid-column:1/-1;color:var(--accent);font-size:0.82rem;">Show ${hiddenCount} more passes…</span>`;
+      moreRow.addEventListener("click", () => {
+        predShowAll = true;
+        render(filtered());
+      });
+      frag.appendChild(moreRow);
+    }
+    dom.upcomingList.replaceChildren(frag);
+  }
+  if (dom.status) {
+    let text = `${current.length} active · ${upcoming.length} upcoming · times in UTC`;
+    if (predSatCount > 0) text += ` · ${predSatCount} satellites tracked`;
+    dom.status.textContent = text;
+  }
+  if (current.length > 0 && isPageVisible()) {
+    startCountdownTimer(dom.currentList);
+  }
+}
+async function load() {
+  if (dom.status) dom.status.textContent = "Loading predictions…";
+  if (dom.currentList) dom.currentList.innerHTML = "";
+  if (dom.upcomingList) dom.upcomingList.innerHTML = "";
+  try {
+    const resp = await fetch("/sat_passes");
+    if (!resp.ok) throw new Error(`HTTP ${resp.status}`);
+    const data = await resp.json();
+    predSatCount = data.satellite_count || 0;
+    if (data.error) {
+      predData = [];
+      render([], data.error);
+    } else {
+      predData = data.passes || [];
+      render(filtered());
+    }
+  } catch (error) {
+    render([], `Failed to load predictions: ${error instanceof Error ? error.message : String(error)}`);
+  }
+}
+function clearPredictionDom() {
+  stopCountdownTimer();
+  if (dom.currentList) dom.currentList.innerHTML = "";
+  if (dom.upcomingList) dom.upcomingList.innerHTML = "";
+}
+predWindow.clearSatPredictionDom = clearPredictionDom;
+predWindow.refreshSatPredictions = function() {
+  predShowAll = false;
+  void load();
+};

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/sstv.js

@@ -1,3 +1,7 @@
+import {
+  forActiveRig,
+  isActiveRigDecode
+} from "./chunk-S57W63QN.js";
 import {
   hostCore
 } from "./chunk-KL66PICH.js";
@@ -111,6 +115,7 @@ function paintRow(line, rgb) {
   liveRows = Math.max(liveRows, line + 1);
 }
 function onProgress(msg) {
+  if (!isActiveRigDecode(msg.rig_id)) return;
   if (msg.state) {
     if (sstvDom.status) sstvDom.status.textContent = msg.state;
     beginPicture(msg.mode || "", msg.width || 0, msg.height || 0);
@@ -131,15 +136,20 @@ function onImage(msg) {
   sstvHistory.push(image);
   if (sstvHistory.length > SSTV_MAX_IMAGES) sstvHistory.shift();
   pruneHistory();
+  if (!isActiveRigDecode(image.rig_id)) return;
   if (sstvDom.status) {
     sstvDom.status.textContent = image.complete ? `Received ${image.mode ?? "picture"}` : `Partial ${image.mode ?? "picture"} — ${image.lines ?? 0} lines`;
   }
   scheduleUi("sstv-latest", renderLatestCard);
   if (activeView === "history") scheduleUi("sstv-history", renderHistoryTable);
 }
+function sstvRigImages() {
+  return forActiveRig(sstvHistory);
+}
 function renderLatestCard() {
   if (!sstvDom.liveLatest) return;
-  const latest = sstvHistory[sstvHistory.length - 1];
+  const rigImages = sstvRigImages();
+  const latest = rigImages[rigImages.length - 1];
   if (!latest) {
     sstvDom.liveLatest.innerHTML = "";
     return;
@@ -160,8 +170,9 @@ function renderLatestCard() {
     </div>`;
 }
 function filteredHistory() {
+  const rigImages = sstvRigImages();
   const text = filterText.trim().toLowerCase();
-  const matching = text ? sstvHistory.filter((image) => (image.mode ?? "").toLowerCase().includes(text)) : sstvHistory.slice();
+  const matching = text ? rigImages.filter((image) => (image.mode ?? "").toLowerCase().includes(text)) : rigImages;
   const newestFirst = (sstvDom.sortSelect?.value ?? "newest") === "newest";
   matching.sort((a, b) => (newestFirst ? 1 : -1) * ((b._tsMs ?? 0) - (a._tsMs ?? 0)));
   return matching;
@@ -241,7 +252,11 @@ sstvWindow.trxPluginRuntime.registerDecoder({
   onMessage: onImage,
   restore: restoreHistory,
   prune: renderHistoryTable,
-  reset: resetHistoryView
+  reset: resetHistoryView,
+  rerender: () => {
+    renderLatestCard();
+    renderHistoryTable();
+  }
 });
 sstvWindow.trxPluginRuntime.registerDecoder({
   id: "sstv_progress",

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/vdes.js

@@ -1,3 +1,7 @@
+import {
+  forActiveRig,
+  isActiveRigDecode
+} from "./chunk-S57W63QN.js";
 import {
   hostCore
 } from "./chunk-KL66PICH.js";
@@ -60,17 +64,21 @@ function vdesHexPreview(rawBytes) {
   if (!Array.isArray(rawBytes) || rawBytes.length === 0) return "--";
   return rawBytes.slice(0, 20).map((value) => value.toString(16).padStart(2, "0")).join(" ").toUpperCase();
 }
+function vdesRigMessages() {
+  return forActiveRig(vdesMessageHistory);
+}
 function updateVdesSummary() {
   pruneVdesMessageHistory();
   if (vdesChannelSummaryEl) {
     vdesChannelSummaryEl.textContent = currentVdesCenterText();
   }
+  const rigMessages = vdesRigMessages();
   if (vdesFrameCountEl) {
-    const count = vdesMessageHistory.length;
+    const count = rigMessages.length;
     vdesFrameCountEl.textContent = `${count} burst${count === 1 ? "" : "s"}`;
   }
   if (vdesLatestSeenEl) {
-    const latest = vdesMessageHistory[0];
+    const latest = rigMessages[0];
     vdesLatestSeenEl.textContent = latest ? vdesAgeText(latest._tsMs) : "No traffic yet";
   }
 }
@@ -137,7 +145,7 @@ function updateVdesBar() {
   updateVdesSummary();
   const isVdes = (document.getElementById("mode")?.value || "").toUpperCase() === "VDES";
   const cutoffMs = Date.now() - VDES_BAR_WINDOW_MS;
-  const messages = vdesMessageHistory.filter((msg) => (msg._tsMs ?? 0) >= cutoffMs).slice(0, 6);
+  const messages = vdesMessageHistory.filter((msg) => (msg._tsMs ?? 0) >= cutoffMs && isActiveRigDecode(msg.rig_id)).slice(0, 6);
   if (!isVdes || messages.length === 0) {
     vdesBarOverlay.style.display = "none";
     vdesBarOverlay.innerHTML = "";
@@ -182,7 +190,7 @@ function renderVdesHistory() {
     return;
   }
   const fragment = document.createDocumentFragment();
-  for (const message of vdesMessageHistory) {
+  for (const message of vdesRigMessages()) {
     fragment.appendChild(renderVdesRow(message));
   }
   vdesMessagesEl.replaceChildren(fragment);
@@ -209,10 +217,10 @@ function normalizeServerVdesMessage(msg) {
 }
 function onServerVdesBatch(messages) {
   if (!Array.isArray(messages) || messages.length === 0) return;
-  if (vdesStatus) vdesStatus.textContent = "Receiving";
   const normalized = [];
   for (const msg of messages) {
     const next = normalizeServerVdesMessage(msg);
+    if (vdesStatus && isActiveRigDecode(next.rig_id)) vdesStatus.textContent = "Receiving";
     const tsMs = Number.isFinite(next.ts_ms) ? Number(next.ts_ms) : Date.now();
     next._tsMs = tsMs;
     next._ts = new Date(tsMs).toLocaleTimeString([], {
@@ -251,8 +259,8 @@ function plotVdesMessage(msg) {
   vdesWindow.vdesMapAddPoint(msg);
 }
 function onServerVdes(msg) {
-  if (vdesStatus) vdesStatus.textContent = "Receiving";
   const next = normalizeServerVdesMessage(msg);
+  if (vdesStatus && isActiveRigDecode(next.rig_id)) vdesStatus.textContent = "Receiving";
   addVdesMessage(next);
   plotVdesMessage(next);
 }
@@ -269,6 +277,10 @@ window.trxPluginRuntime.registerDecoder({
   restore: onServerVdesBatch,
   reset: resetVdesHistoryView,
   prune: pruneVdesHistoryView,
+  rerender: () => {
+    updateVdesBar();
+    renderVdesHistory();
+  },
   // Oldest first, so tracks are rebuilt in the order they happened.
   syncMap: () => {
     for (const entry of [...vdesMessageHistory].reverse()) plotVdesMessage(entry);

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/wefax.js

@@ -1,3 +1,7 @@
+import {
+  forActiveRig,
+  isActiveRigDecode
+} from "./chunk-S57W63QN.js";
 import {
   hostCore
 } from "./chunk-KL66PICH.js";
@@ -102,13 +106,17 @@ function paintLine(lineBytes) {
   wefaxLiveCtx.putImageData(imgData, 0, y);
   wefaxLiveLineCount++;
 }
+function wefaxRigImages() {
+  return forActiveRig(wefaxImageHistory);
+}
 function renderWefaxLatestCard() {
   if (!wefaxDom.liveLatest) return;
-  if (wefaxImageHistory.length === 0) {
+  const rigImages = wefaxRigImages();
+  if (rigImages.length === 0) {
     wefaxDom.liveLatest.innerHTML = '<div style="color:var(--text-muted);font-size:0.82rem;">No images decoded yet. Enable the decoder and tune to a WEFAX station.</div>';
     return;
   }
-  const img = wefaxImageHistory[0];
+  const img = rigImages[0];
   if (!img) return;
   const ts = img._ts || "--";
   const date = img._tsMs ? new Date(img._tsMs).toLocaleDateString() : "";
@@ -129,7 +137,7 @@ function renderWefaxLatestCard() {
   wefaxDom.liveLatest.innerHTML = html;
 }
 function getWefaxFilteredHistory() {
-  let items = wefaxImageHistory;
+  let items = wefaxRigImages();
   if (wefaxFilterText) {
     items = items.filter(function(i) {
       const haystack = [
@@ -173,7 +181,7 @@ function renderWefaxHistoryTable() {
   }
   wefaxDom.historyList.replaceChildren(fragment);
   if (wefaxDom.historyCount) {
-    const total = wefaxImageHistory.length;
+    const total = wefaxRigImages().length;
     const shown = items.length;
     wefaxDom.historyCount.textContent = total === 0 ? "No images yet" : shown === total ? `${String(total)} image${total === 1 ? "" : "s"}` : `${String(shown)} of ${String(total)} images`;
   }
@@ -208,6 +216,7 @@ function addWefaxImage(msg) {
   }
 }
 function onServerWefaxProgress(msg) {
+  if (!isActiveRigDecode(msg.rig_id)) return;
   if (msg.state && !msg.line_data) {
     if (wefaxDom.status) {
       wefaxDom.status.textContent = msg.state;
@@ -234,6 +243,7 @@ function onServerWefaxProgress(msg) {
 }
 function onServerWefax(msg) {
   addWefaxImage(msg);
+  if (!isActiveRigDecode(msg.rig_id)) return;
   if (wefaxDom.liveContainer) wefaxDom.liveContainer.style.display = "none";
   if (wefaxDom.status) {
     wefaxDom.status.textContent = `Complete — ${String(msg.line_count ?? 0)} lines`;
@@ -328,7 +338,11 @@ wefaxWindow.trxPluginRuntime.registerDecoder({
   onMessage: onServerWefax,
   restore: restoreWefaxHistory,
   prune: pruneWefaxHistoryView,
-  reset: resetWefaxHistoryView
+  reset: resetWefaxHistoryView,
+  rerender: () => {
+    renderWefaxLatestCard();
+    renderWefaxHistoryTable();
+  }
 });
 wefaxWindow.trxPluginRuntime.registerDecoder({
   id: "wefax_progress",

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/wspr.js

@@ -1,3 +1,7 @@
+import {
+  forActiveRig,
+  isActiveRigDecode
+} from "./chunk-S57W63QN.js";
 import {
   hostCore
 } from "./chunk-KL66PICH.js";
@@ -64,10 +68,10 @@ function renderWsprRow(msg) {
 function renderWsprHistory() {
   pruneWsprMessageHistory();
   if (!wsprMessagesEl) return;
+  const rigMessages = forActiveRig(wsprMessageHistory);
   const fragment = document.createDocumentFragment();
-  for (let i = 0; i < wsprMessageHistory.length; i += 1) {
+  for (const message of rigMessages) {
-    const message = wsprMessageHistory[i];
+    fragment.appendChild(renderWsprRow(message));
-    if (message) fragment.appendChild(renderWsprRow(message));
   }
   wsprMessagesEl.replaceChildren(fragment);
 }
@@ -90,6 +94,8 @@ function normalizeServerWsprMessage(msg) {
     station,
     rfHz,
     history: {
+      rig_id: msg.rig_id ?? null,
+      _rfHz: rfHz,
       receiver: wsprWindow.getDecodeRigMeta ? wsprWindow.getDecodeRigMeta() : null,
       ts_ms: msg.ts_ms,
       snr_db: msg.snr_db,
@@ -101,16 +107,11 @@ function normalizeServerWsprMessage(msg) {
 }
 function onServerWsprBatch(messages) {
   if (!Array.isArray(messages) || messages.length === 0) return;
-  if (wsprStatus) wsprStatus.textContent = "Receiving";
   const normalized = [];
   for (const msg of messages) {
     const next = normalizeServerWsprMessage(msg);
-    if (next.grids.length > 0 && wsprWindow.mapAddLocator) {
+    if (wsprStatus && isActiveRigDecode(msg.rig_id)) wsprStatus.textContent = "Receiving";
-      wsprWindow.mapAddLocator(next.raw, next.grids, "wspr", next.station, {
+    plotWsprLocator(msg);
-        ...msg,
-        ...next.rfHz === null ? {} : { freq_hz: next.rfHz }
-      });
-    }
     next.history._tsMs = Number.isFinite(next.history.ts_ms) ? Number(next.history.ts_ms) : Date.now();
     normalized.push(next.history);
   }
@@ -250,15 +251,19 @@ document.getElementById("settings-clear-wspr-history")?.addEventListener("click"
     }
   })();
 });
-function onServerWspr(msg) {
+function plotWsprLocator(msg) {
-  if (wsprStatus) wsprStatus.textContent = "Receiving";
   const next = normalizeServerWsprMessage(msg);
-  if (next.grids.length > 0 && wsprWindow.mapAddLocator) {
+  if (next.grids.length === 0 || !wsprWindow.mapAddLocator) return;
-    wsprWindow.mapAddLocator(next.raw, next.grids, "wspr", next.station, {
+  const rfHz = finiteNumber(msg._rfHz) ?? next.rfHz;
-      ...msg,
+  wsprWindow.mapAddLocator(next.raw, next.grids, "wspr", next.station, {
-      ...next.rfHz === null ? {} : { freq_hz: next.rfHz }
+    ...msg,
-    });
+    ...rfHz === null ? {} : { freq_hz: rfHz }
-  }
+  });
+}
+function onServerWspr(msg) {
+  if (wsprStatus && isActiveRigDecode(msg.rig_id)) wsprStatus.textContent = "Receiving";
+  const next = normalizeServerWsprMessage(msg);
+  plotWsprLocator(msg);
   addWsprMessage(next.history);
 }
 wsprWindow.trxPluginRuntime.registerDecoder({
@@ -267,5 +272,10 @@ wsprWindow.trxPluginRuntime.registerDecoder({
   onBatch: onServerWsprBatch,
   restore: onServerWsprBatch,
   prune: pruneWsprHistoryView,
-  reset: resetWsprHistoryView
+  reset: resetWsprHistoryView,
+  rerender: renderWsprHistory,
+  // Oldest first, so the map builds the grids up in the order they were heard.
+  syncMap: () => {
+    for (const message of [...wsprMessageHistory].reverse()) plotWsprLocator(message);
+  }
 });

src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html

@@ -24,6 +24,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
     <symbol id="icon-bookmark" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M4 2h8v12l-4-2.5L4 14V2z"/></symbol>
     <symbol id="icon-digital" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M1 11.5h2.6V4.5h3.2v7h3.2v-7h3.2v7H15"/></symbol>
     <symbol id="icon-map" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><path d="M8 2a4 4 0 0 1 4 4c0 3-4 8-4 8S4 9 4 6a4 4 0 0 1 4-4z"/><circle cx="8" cy="6" r="1.2" fill="currentColor" stroke="none"/></symbol>
+    <symbol id="icon-satellite" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.4" stroke-linecap="round" stroke-linejoin="round"><path d="M2 13.2 5.6 9.6"/><path d="M4.2 8.2a3.4 3.4 0 0 1 4.8 4.8z"/><path d="M9.2 6.6a3.2 3.2 0 0 1 2.6 2.6"/><path d="M9.8 3.6a6.2 6.2 0 0 1 5.2 5.2"/></symbol>
     <symbol id="icon-stats" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.4" stroke-linecap="round" stroke-linejoin="round"><path d="M2 14h12"/><rect x="3" y="8" width="2" height="6" rx="0.4" fill="currentColor" stroke="none" opacity="0.6"/><rect x="7" y="5" width="2" height="9" rx="0.4" fill="currentColor" stroke="none" opacity="0.75"/><rect x="11" y="2" width="2" height="12" rx="0.4" fill="currentColor" stroke="none" opacity="0.9"/></symbol>
     <symbol id="icon-record" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"><circle cx="8" cy="8" r="6"/><circle cx="8" cy="8" r="2.5" fill="currentColor" stroke="none"/></symbol>
     <symbol id="icon-settings" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.4" stroke-linecap="round" stroke-linejoin="round"><path d="M9.8 3.1a2.6 2.6 0 0 0-2.2 3.9L3.4 11.2a1.2 1.2 0 1 0 1.7 1.7l4.2-4.2a2.6 2.6 0 0 0 3.9-2.2l-1.8.6-1.2-1.2z"/><path d="M10.2 5.8 12 4"/></symbol>
@@ -63,6 +64,10 @@ SPDX-License-Identifier: GPL-2.0-or-later
             <svg class="tab-icon" aria-hidden="true"><use href="#icon-map"/></svg>
             <span class="tab-label">Map</span>
           </button>
+          <button class="tab" data-tab="satellites">
+            <svg class="tab-icon" aria-hidden="true"><use href="#icon-satellite"/></svg>
+            <span class="tab-label">Satellites</span>
+          </button>
           <button class="tab" data-tab="statistics">
             <svg class="tab-icon" aria-hidden="true"><use href="#icon-stats"/></svg>
             <span class="tab-label">Statistics</span>
@@ -918,7 +923,6 @@ SPDX-License-Identifier: GPL-2.0-or-later
         <div class="sat-view-bar">
           <button id="sat-view-live" class="sat-view-btn sat-view-active" type="button">Live</button>
           <button id="sat-view-history" class="sat-view-btn" type="button">History</button>
-          <button id="sat-view-predictions" class="sat-view-btn" type="button">Predictions</button>
         </div>
         <!-- Live view -->
         <div id="sat-live-view">
@@ -960,50 +964,6 @@ SPDX-License-Identifier: GPL-2.0-or-later
           <div id="sat-history-list"></div>
           <small id="sat-history-count" style="color:var(--text-muted);font-size:0.75rem;">No images yet</small>
         </div>
-        <!-- Predictions view -->
-        <div id="sat-predictions-view" style="display:none;">
-          <div class="ft8-controls">
-            <input id="sat-pred-filter" class="ft8-filter" type="text" placeholder="Filter (e.g. ISS, NOAA, Meteor)" />
-            <select id="sat-pred-category" class="sat-sort-select">
-              <option value="all">All</option>
-              <option value="weather">Weather</option>
-              <option value="amateur">Ham Radio</option>
-              <option value="other">Other</option>
-            </select>
-            <select id="sat-pred-min-el" class="sat-sort-select">
-              <option value="0">All passes</option>
-              <option value="10">Min 10°</option>
-              <option value="20">Min 20°</option>
-              <option value="45">Min 45°</option>
-            </select>
-          </div>
-          <!-- Current passes -->
-          <div id="sat-pred-current-section">
-            <div class="sat-pred-section-title">Currently receivable</div>
-            <div class="sat-pred-header sat-pred-header-current">
-              <span class="sat-pred-col-sat">Satellite</span>
-              <span class="sat-pred-col-el">Max El</span>
-              <span class="sat-pred-col-time">AOS Start</span>
-              <span class="sat-pred-col-time">AOS End</span>
-              <span class="sat-pred-col-countdown">Time left</span>
-              <span class="sat-pred-col-dir">Direction</span>
-            </div>
-            <div id="sat-pred-current-list"></div>
-          </div>
-          <!-- Upcoming passes -->
-          <div id="sat-pred-upcoming-section">
-            <div class="sat-pred-section-title">Upcoming passes</div>
-            <div class="sat-pred-header">
-              <span class="sat-pred-col-time">AOS (UTC)</span>
-              <span class="sat-pred-col-sat">Satellite</span>
-              <span class="sat-pred-col-el">Max El</span>
-              <span class="sat-pred-col-dur">Duration</span>
-              <span class="sat-pred-col-dir">Direction</span>
-            </div>
-            <div id="sat-pred-list"></div>
-          </div>
-          <small id="sat-pred-status" style="color:var(--text-muted);font-size:0.75rem;">Loading predictions&hellip;</small>
-        </div>
       </div>
       <div id="subtab-wefax" class="sub-tab-panel" style="display:none;">
         <div class="ft8-controls">
@@ -1117,6 +1077,51 @@ SPDX-License-Identifier: GPL-2.0-or-later
       </div>
       </template>
     </div>
+    <div id="tab-satellites" class="tab-panel" style="display:none;">
+      <h2 class="section-heading">Satellites</h2>
+      <div class="ft8-controls">
+        <input id="sat-pred-filter" class="ft8-filter" type="text" placeholder="Filter (e.g. ISS, NOAA, Meteor)" />
+        <select id="sat-pred-category" class="sat-sort-select">
+          <option value="all">All</option>
+          <option value="weather">Weather</option>
+          <option value="amateur">Ham Radio</option>
+          <option value="other">Other</option>
+        </select>
+        <select id="sat-pred-min-el" class="sat-sort-select">
+          <option value="0">All passes</option>
+          <option value="10">Min 10°</option>
+          <option value="20">Min 20°</option>
+          <option value="45">Min 45°</option>
+        </select>
+      </div>
+      <!-- Current passes -->
+      <div id="sat-pred-current-section">
+        <div class="sat-pred-section-title">Currently receivable</div>
+        <div class="sat-pred-header sat-pred-header-current">
+          <span class="sat-pred-col-sat">Satellite</span>
+          <span class="sat-pred-col-el">Max El</span>
+          <span class="sat-pred-col-time">AOS Start</span>
+          <span class="sat-pred-col-time">AOS End</span>
+          <span class="sat-pred-col-countdown">Time left</span>
+          <span class="sat-pred-col-dir">Direction</span>
+        </div>
+        <div id="sat-pred-current-list"></div>
+      </div>
+      <!-- Upcoming passes -->
+      <div id="sat-pred-upcoming-section">
+        <div class="sat-pred-section-title">Upcoming passes</div>
+        <div class="sat-pred-header">
+          <span class="sat-pred-col-time">AOS (UTC)</span>
+          <span class="sat-pred-col-sat">Satellite</span>
+          <span class="sat-pred-col-el">Max El</span>
+          <span class="sat-pred-col-dur">Duration</span>
+          <span class="sat-pred-col-dir">Direction</span>
+        </div>
+        <div id="sat-pred-list"></div>
+      </div>
+      <small id="sat-pred-status" style="color:var(--text-muted);font-size:0.75rem;">Loading predictions&hellip;</small>
+    </div>
+
     <div id="tab-statistics" class="tab-panel" style="display:none;">
       <h2 class="section-heading">Statistics</h2>
       <template id="tmpl-statistics">
@@ -1462,30 +1467,31 @@ SPDX-License-Identifier: GPL-2.0-or-later
       <div id="subtab-settings-background-decode" class="sub-tab-panel" style="display:none;">
         <div id="background-decode-panel" class="sch-panel">
           <div class="sch-toast" id="background-decode-toast" role="alert" aria-live="polite" style="display:none;"></div>
-          <!-- Now Playing status card (moved to top) -->
-          <div class="now-playing-card">
-            <div id="background-decode-status-card" class="sch-status-card">No background decode bookmarks configured.</div>
-          </div>
           <div class="sch-section">
-            <div class="sch-section-title">Configuration</div>
+            <div class="sch-section-title">Background Decode</div>
-            <div class="sch-row">
+            <p class="bgd-intro">
-              <label class="sch-label bgd-toggle-wrap">Background decode
+              Decodes saved bookmarks on hidden channels while you work another band.
-                <span class="bgd-toggle-row">
+              Needs an SDR rig, and a bookmark is only decoded while it falls inside
-                  <input type="checkbox" id="background-decode-enabled" />
+              the span the rig is tuned across.
-                  <span>Enable hidden background decoder channels</span>
+            </p>
-                </span>
+            <div class="bgd-controls">
+              <label class="bgd-enable">
+                <input type="checkbox" id="background-decode-enabled" />
+                <span>Enabled</span>
               </label>
+              <span id="bgd-span-summary" class="bgd-span" aria-live="polite"></span>
             </div>
-            <div class="sch-row" style="flex-direction:column;gap:0.5rem;">
+            <div class="bgd-list-toolbar">
-              <label class="sch-label" style="min-width:100%;">Bookmarks
+              <input type="text" id="bgd-bookmark-filter" class="bgd-checklist-filter"
-                <input type="text" id="bgd-bookmark-filter" class="bgd-checklist-filter" placeholder="Filter bookmarks..." />
+                     placeholder="Filter bookmarks&hellip;" aria-label="Filter bookmarks" />
-              </label>
               <div class="bgd-select-actions">
-                <button type="button" id="bgd-select-all-btn" class="bgd-select-btn" aria-label="Select all bookmarks">Select All</button>
+                <button type="button" id="bgd-select-all-btn" class="bgd-select-btn" aria-label="Select every bookmark">All</button>
-                <button type="button" id="bgd-deselect-all-btn" class="bgd-select-btn" aria-label="Deselect all bookmarks">Deselect All</button>
+                <button type="button" id="bgd-deselect-all-btn" class="bgd-select-btn" aria-label="Select no bookmarks">None</button>
               </div>
-              <div id="bgd-bookmark-checklist" class="bgd-checklist"></div>
             </div>
+            <div id="bgd-bookmark-checklist" class="bgd-checklist" role="group"
+                 aria-label="Bookmarks decoded in the background"></div>
+            <div id="bgd-selection-summary" class="bgd-summary" aria-live="polite"></div>
           </div>
 
           <div class="sch-actions">

src/trx-client/trx-frontend/trx-frontend-http/assets/web/style.css

@@ -3816,11 +3816,12 @@ body[data-operator-layout="broadcast"] #cw-bar-overlay {
 @media (max-width: 760px) {
   body[data-operator-layout="broadcast"] #wfm-controls-col { flex-basis: 100%; }
 }
-/* One navigation model at every width.  Statistics, Recorder, Settings and
+/* One navigation model at every width.  Satellites, Statistics, Recorder,
- * About are occasional destinations: they live behind More rather than
+ * Settings and About are occasional destinations: they live behind More rather
- * competing with the operating tabs for the row and then scrolling out of
+ * than competing with the operating tabs for the row and then scrolling out of
  * reach.  The mobile layout already grouped them this way; the desktop strip
  * now matches it, which is why the tab strip no longer needs to scroll. */
+.tab-bar-nav .tab[data-tab="satellites"],
 .tab-bar-nav .tab[data-tab="statistics"],
 .tab-bar-nav .tab[data-tab="recorder"],
 .tab-bar-nav .tab[data-tab="settings"],
@@ -4030,8 +4031,9 @@ body[data-operator-layout="broadcast"] #cw-bar-overlay {
     box-shadow: inset 0 1px 0 color-mix(in srgb, #ffffff 8%, transparent);
   }
   .tab-icon, .tab-more-icon { display: block; }
-  .tab[data-tab="statistics"], .tab[data-tab="recorder"],
+  .tab[data-tab="satellites"], .tab[data-tab="statistics"],
-  .tab[data-tab="settings"], .tab[data-tab="about"] { display: none; }
+  .tab[data-tab="recorder"], .tab[data-tab="settings"],
+  .tab[data-tab="about"] { display: none; }
   .mobile-more-btn { display: flex; }
   .mobile-more-menu {
     position: fixed;
@@ -5587,18 +5589,6 @@ body[data-operator-layout="broadcast"] #cw-bar-overlay {
 #sch-sat-form-cancel:hover {
   background: var(--border);
 }
-.bgd-toggle-wrap {
-  min-width: 18rem;
-  flex: 1 1 20rem;
-}
-.bgd-toggle-row {
-  display: inline-flex;
-  align-items: center;
-  gap: 0.55rem;
-  min-height: var(--control-height);
-  color: var(--text);
-  font-weight: 500;
-}
 .bgd-add-row {
   display: flex;
   gap: 0.55rem;
@@ -5622,48 +5612,6 @@ body[data-operator-layout="broadcast"] #cw-bar-overlay {
   color: var(--text-muted);
   font-size: 0.78rem;
 }
-.bgd-status-list {
-  display: grid;
-  gap: 0.65rem;
-}
-.bgd-status-row {
-  display: flex;
-  justify-content: space-between;
-  gap: 1rem;
-  padding: 0.65rem 0.75rem;
-  border: 1px solid var(--border-light);
-  border-radius: 0.55rem;
-  background: color-mix(in srgb, var(--card-bg) 74%, transparent);
-}
-.bgd-status-name {
-  font-weight: 600;
-}
-.bgd-status-meta {
-  color: var(--text-muted);
-  font-size: 0.82rem;
-}
-.bgd-status-state {
-  align-self: center;
-  white-space: nowrap;
-  font-size: 0.78rem;
-  font-weight: 700;
-  letter-spacing: 0.05em;
-  text-transform: uppercase;
-  color: var(--accent-green);
-}
-.bgd-status-state[data-state="out_of_span"],
-.bgd-status-state[data-state="waiting_for_spectrum"],
-.bgd-status-state[data-state="waiting_for_user"],
-.bgd-status-state[data-state="scheduler_has_control"],
-.bgd-status-state[data-state="inactive"],
-.bgd-status-state[data-state="handled_by_scheduler"],
-.bgd-status-state[data-state="handled_by_virtual_channel"] {
-  color: var(--accent-yellow);
-}
-.bgd-status-state[data-state="missing_bookmark"],
-.bgd-status-state[data-state="no_supported_decoders"] {
-  color: var(--accent-red);
-}
 /* ── "Now Playing" status card (top of scheduler & bgd panels) ──── */
 .now-playing-card {
   border-left: 3px solid var(--accent-green);
@@ -5879,18 +5827,65 @@ body[data-operator-layout="broadcast"] #cw-bar-overlay {
   color: var(--text-muted);
   opacity: 0.7;
 }
+.bgd-intro {
+  margin: 0 0 0.9rem;
+  max-width: 62ch;
+  color: var(--text-muted);
+  font-size: 0.85rem;
+  line-height: 1.45;
+}
+/* The switch and what the rig can hear, on one line: the second is the reason
+   a selected bookmark may not be decoding, so it belongs beside the first. */
+.bgd-controls {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  justify-content: space-between;
+  gap: 0.75rem;
+  margin-bottom: 0.9rem;
+}
+.bgd-enable {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.5rem;
+  font-size: 0.9rem;
+  font-weight: 600;
+  color: var(--text);
+  cursor: pointer;
+}
+.bgd-span {
+  color: var(--text-muted);
+  font-size: 0.82rem;
+}
+.bgd-span[data-tone="warn"] {
+  color: var(--text-warn, #b7791f);
+}
+/* The filter and the bulk buttons sit on the list they act on, and stay on it
+   when the panel narrows. */
+.bgd-list-toolbar {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  margin-bottom: 0.5rem;
+}
+.bgd-list-toolbar .bgd-checklist-filter {
+  flex: 1 1 auto;
+  min-width: 0;
+}
 .bgd-checklist {
-  max-height: 16rem;
+  max-height: 22rem;
   overflow-y: auto;
   border: 1px solid var(--border-light);
   border-radius: 0.4rem;
   background: var(--bg-secondary);
 }
+/* One row per bookmark: pick it here, and read what it is doing here too. */
 .bgd-checklist-row {
-  display: flex;
+  display: grid;
+  grid-template-columns: auto minmax(6rem, 1fr) auto auto;
   align-items: center;
   gap: 0.55rem;
-  padding: 0.45rem 0.65rem;
+  padding: 0.5rem 0.65rem;
   border-bottom: 1px solid var(--border-light);
   cursor: pointer;
   font-size: 0.85rem;
@@ -5902,28 +5897,83 @@ body[data-operator-layout="broadcast"] #cw-bar-overlay {
 .bgd-checklist-row:hover {
   background: color-mix(in srgb, var(--card-bg) 60%, transparent);
 }
+.bgd-checklist-row.is-selected {
+  background: color-mix(in srgb, var(--accent-green) 8%, transparent);
+}
 .bgd-checklist-row input[type="checkbox"] {
   flex-shrink: 0;
 }
 .bgd-checklist-name {
   font-weight: 600;
   color: var(--text);
-}
+  overflow: hidden;
-.bgd-checklist-meta {
+  text-overflow: ellipsis;
-  color: var(--text-muted);
-  font-size: 0.78rem;
-  margin-left: auto;
   white-space: nowrap;
 }
+.bgd-checklist-meta {
+  display: inline-flex;
+  align-items: baseline;
+  gap: 0.4rem;
+  color: var(--text-muted);
+  font-size: 0.78rem;
+  white-space: nowrap;
+  font-variant-numeric: tabular-nums;
+}
+.bgd-checklist-mode {
+  color: var(--text-muted);
+  opacity: 0.85;
+}
+/* A dot and a word. The dot carries the state, so the word can stay a word. */
+.bgd-state {
+  display: inline-flex;
+  align-items: center;
+  justify-content: flex-end;
+  gap: 0.35rem;
+  min-width: 9.5rem;
+  color: var(--text-muted);
+  font-size: 0.76rem;
+  white-space: nowrap;
+}
+.bgd-state-dot {
+  width: 0.5rem;
+  height: 0.5rem;
+  border-radius: 50%;
+  background: currentcolor;
+  opacity: 0.55;
+  flex-shrink: 0;
+}
+.bgd-state[data-state="active"] {
+  color: var(--accent-green);
+  font-weight: 600;
+}
+.bgd-state[data-state="active"] .bgd-state-dot {
+  opacity: 1;
+  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-green) 22%, transparent);
+}
+.bgd-state[data-state="missing_bookmark"],
+.bgd-state[data-state="no_supported_decoders"] {
+  color: var(--color-error, #c0392b);
+}
+.bgd-state[data-state="unselected"] {
+  min-width: 0;
+}
 .bgd-checklist-empty {
-  padding: 0.75rem;
+  padding: 1rem 0.75rem;
   text-align: center;
   color: var(--text-muted);
   font-size: 0.85rem;
+  line-height: 1.5;
 }
-/* ── Select All / Deselect All buttons ────────────────────────────── */
+/* What the selection adds up to, under the list it describes. */
+.bgd-summary {
+  margin-top: 0.5rem;
+  color: var(--text-muted);
+  font-size: 0.8rem;
+}
+/* ── Select all / none buttons ─────────────────────────────────────── */
 .bgd-select-actions {
   display: flex;
+  flex-shrink: 0;
   gap: 0.5rem;
 }
 .bgd-select-btn {
@@ -5941,15 +5991,6 @@ body[data-operator-layout="broadcast"] #cw-bar-overlay {
   background: var(--card-bg);
   color: var(--text);
 }
-/* ── SVG State Dot Badges ─────────────────────────────────────────── */
-.bgd-state-dot {
-  width: 8px;
-  height: 8px;
-  display: inline-block;
-  vertical-align: middle;
-  margin-right: 4px;
-  fill: currentColor;
-}
 @media (max-width: 600px) {
   .channel-scheduler-controls {
     flex-direction: column;
@@ -5990,8 +6031,7 @@ body[data-operator-layout="broadcast"] #cw-bar-overlay {
   .bm-page-summary {
     text-align: center;
   }
-  .bgd-add-row,
+  .bgd-add-row {
-  .bgd-status-row {
     flex-direction: column;
     align-items: stretch;
   }
@@ -6001,8 +6041,17 @@ body[data-operator-layout="broadcast"] #cw-bar-overlay {
   .interleave-ring-label {
     max-width: 8rem;
   }
-  .bgd-checklist-meta {
+  /* Two lines rather than four columns: the name and its state stay legible
-    margin-left: 0;
+     when there is no room for the frequency beside them. */
+  .bgd-checklist-row {
+    grid-template-columns: auto minmax(0, 1fr);
+    row-gap: 0.2rem;
+  }
+  .bgd-checklist-meta,
+  .bgd-state {
+    grid-column: 2;
+    justify-content: flex-start;
+    min-width: 0;
     font-size: 0.75rem;
   }
 }

src/trx-client/trx-frontend/trx-frontend-http/frontend/build.mjs

@@ -30,6 +30,7 @@ await build({
     "hf-aprs": path.join(sourceDir, "plugins", "hf-aprs.ts"),
     sat: path.join(sourceDir, "plugins", "sat.ts"),
     "sat-scheduler": path.join(sourceDir, "plugins", "sat-scheduler.ts"),
+    "satellite-predictions": path.join(sourceDir, "plugins", "satellite-predictions.ts"),
     vchan: path.join(sourceDir, "plugins", "vchan.ts"),
     bookmarks: path.join(sourceDir, "plugins", "bookmarks.ts"),
     scheduler: path.join(sourceDir, "plugins", "scheduler.ts"),

src/trx-client/trx-frontend/trx-frontend-http/frontend/package.json

@@ -12,7 +12,7 @@
     "typecheck": "tsc --project tsconfig.json && tsc --project tsconfig.worker.json",
     "lint": "eslint \"src/**/*.ts\" \"tests/**/*.mjs\" build.mjs --no-error-on-unmatched-pattern",
     "test": "node --test tests/*.test.mjs",
-    "test:browser": "node tests/browser-smoke.mjs && node tests/spectrum-layout.mjs && node tests/decode-flow.mjs && node tests/tune-links.mjs && node tests/mobile-layout.mjs",
+    "test:browser": "node tests/browser-smoke.mjs && node tests/spectrum-layout.mjs && node tests/decode-flow.mjs && node tests/tune-links.mjs && node tests/mobile-layout.mjs && node tests/satellite-predictions.mjs && node tests/background-decode.mjs",
     "verify-generated": "npm run generate-types && npm run build && git diff --exit-code -- ../assets/web/generated src/api/generated.ts"
   },
   "devDependencies": {

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/api/generated.ts

@@ -78,6 +78,10 @@ export type RdsData = { pi?: number | null, program_service?: string | null, rad
 export type SpectrumData = { 
 /**
  * FFT magnitude bins in dBFS, FFT-shifted so DC (centre frequency) is at index N/2.
+ *
+ * On the wire these are base64-encoded `i8` whole dBFS (see
+ * `spectrum_wire`), which is what the display draws anyway; the TypeScript
+ * type describes the decoded array the browser receives over SSE.
  */
 bins: Array<number>, 
 /**

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/app.ts

@@ -385,12 +385,14 @@ declare global {
     refreshCwTonePicker?(): void;
     updateFt8RfDisplay?(): void;
     clearSatPredictionDom?(): void;
+    refreshSatPredictions?(): void;
     syncWefaxToggle?(enabled: boolean): void;
     syncSstvToggle?(enabled: boolean): void;
     updateAisBar?(value?: number): void;
     updateVdesBar?(value?: number): void;
     updateAprsBar?(value?: number): void;
     updateFt8Bar?(value?: number): void;
+    updateCwBar?(value?: number): void;
     updateSatLiveState?(value: unknown): void;
     applyCwAutoUi?(enabled: boolean): void;
     applyCwAutoUiFromServer?(enabled: boolean): void;
@@ -1466,9 +1468,13 @@ function applyRigList(activeRigId: string | null, rigIds: string[], displayNames
   populateRigPicker(headerRigSwitchSelect, lastRigIds, lastActiveRigId, disableSwitch);
   updateRigSubtitle(lastActiveRigId);
   window.trxUi?.setActiveRig(lastActiveRigId);
+  // Told every time, not only when the list changes: these modules load lazily
+  // and can miss the one telling there was, which left them holding no rig and
+  // showing an empty panel until the operator switched rigs. Both ignore a rig
+  // they already have.
+  window.trx.modules.scheduler?.setRig(lastActiveRigId);
+  window.trx.modules.backgroundDecode?.setRig(lastActiveRigId);
   if (rigListChanged) {
-    window.trx.modules.scheduler?.setRig(lastActiveRigId);
-    window.trx.modules.backgroundDecode?.setRig(lastActiveRigId);
     window.trx.modules.bookmarks?.populateScopePicker();
     void window.trx.modules.bookmarks?.fetch((document.getElementById("bm-category-filter") as HTMLSelectElement | null)?.value || "");
   }
@@ -2206,6 +2212,17 @@ function resetRdsDisplay() {
   updateRdsPsOverlay(primaryRds);
 }
 
+// The mini views over the waterfall show only what the rig on screen heard, so
+// they have to be repainted whenever that rig — or its mode — changes, not just
+// when the next decode happens to arrive.
+function refreshDecodeBars() {
+  window.updateAisBar?.();
+  window.updateVdesBar?.();
+  window.updateAprsBar?.();
+  window.updateFt8Bar?.();
+  window.updateCwBar?.();
+}
+
 function resetDecoderStateOnRigSwitch() {
   // RDS
   primaryRds = null;
@@ -2225,6 +2242,12 @@ function resetDecoderStateOnRigSwitch() {
     const el = document.getElementById(id);
     if (el) el.textContent = "--";
   });
+
+  // The decode stream is not rig-scoped, so the histories behind the mini views
+  // and the decoder panels survive the switch: repaint both for the rig now
+  // selected instead of leaving the outgoing rig's traffic on screen.
+  refreshDecodeBars();
+  window.trxPluginRuntime.rerenderAll();
 }
 
 function resetWfmStereoIndicator() {
@@ -3675,10 +3698,7 @@ function render(update: AppUpdate) {
     const connText = _decodeConnectedText[d.id] || "Connected, listening for packets";
     setModeBoundDecodeStatus(el, d.active_modes, "Select " + d.active_modes[0] + " mode to decode", connText);
   }
-  if (window.updateAisBar) window.updateAisBar();
+  refreshDecodeBars();
-  if (window.updateVdesBar) window.updateVdesBar();
-  if (window.updateAprsBar) window.updateAprsBar();
-  if (window.updateFt8Bar) window.updateFt8Bar();
   // Toggle-gated decoder status: clear "Receiving" when decoder disabled or mode wrong.
   for (const d of decoderRegistry) {
     if (d.activation !== "toggle") continue;
@@ -4849,6 +4869,7 @@ function _initMapWhenReady() {
 
 function navigateToTab(name: TabName, options: { updateHistory?: boolean; replaceHistory?: boolean } = {}) {
   window.trxUi?.closeMobileOverlays?.();
+  const leavingSatellites = _activeTab === "satellites" && name !== "satellites";
   const { updateHistory = true, replaceHistory = false } = options;
   if (authEnabled && !authRole && name !== "main") {
     showAuthGate(false);
@@ -4889,7 +4910,15 @@ function navigateToTab(name: TabName, options: { updateHistory?: boolean; replac
     updateTabHistory(name, replaceHistory);
   }
   scheduleSpectrumLayout();
-  void loadPluginsForTab(name).catch((error: unknown) => { console.error(error); });
+  // Its countdowns tick every second, so the page stops when it is not on screen.
+  if (leavingSatellites) window.clearSatPredictionDom?.();
+  void loadPluginsForTab(name).then(() => {
+    // Passes go stale while the page is closed, so each visit reloads them.
+    // The first visit is what imports the module, which renders on its own.
+    if (name === "satellites") window.refreshSatPredictions?.();
+    // The map module owns the decode log; this is the moment it can exist.
+    flushPendingDecodeStats();
+  }).catch((error: unknown) => { console.error(error); });
   if (name === "map") {
     _initMapWhenReady();
   }
@@ -5011,7 +5040,12 @@ async function initializeApp() {
   }
 }
 
+// Whether the session got far enough to wire the settings panels up, so the
+// plugins can be wired again if they turn up after it did.
+let settingsUiReady = false;
+
 function initSettingsUI() {
+  settingsUiReady = true;
   window.trx.modules.scheduler?.initialize(lastActiveRigId, authRole);
   window.trx.modules.scheduler?.wireEvents();
   if (window.trx.modules.backgroundDecode) {
@@ -5164,7 +5198,15 @@ window.trx = Object.freeze({ state: trxState, core: trxCore, modules: trxModules
 
 // Load plugin scripts now that window.trx is populated.  Dynamic scripts are
 // async so they must not be created before the namespace they depend on exists.
-void loadEagerPlugins().catch((error: unknown) => { console.error(error); });
+//
+// Wire the settings panels again once they are here: the session can be up
+// before these modules finish importing, and the wiring at that point silently
+// skipped whichever had not arrived.  A panel that missed it had no rig, no
+// data, and dead buttons — for the rest of the session, since nothing came
+// back to it.  Both entry points are safe to run twice.
+void loadEagerPlugins()
+  .then(() => { if (settingsUiReady) initSettingsUI(); })
+  .catch((error: unknown) => { console.error(error); });
 
 // Start the app
 void initializeApp();
@@ -5241,10 +5283,6 @@ function _wireSubTabBar(bar: WiredElement) {
         if (window.refreshCwTonePicker) window.refreshCwTonePicker();
       });
     }
-    // Clear SAT prediction DOM when leaving the SAT tab to reduce node count.
-    if (btn.dataset.subtab !== "sat" && typeof window.clearSatPredictionDom === "function") {
-      window.clearSatPredictionDom();
-    }
   });
 }
 document.querySelectorAll<WiredElement>(".sub-tab-bar").forEach(_wireSubTabBar);
@@ -6578,11 +6616,49 @@ const IMAGE_DECODE_KINDS = new Set([
   "lrpt_image", "lrpt_progress", "wefax", "wefax_progress", "sstv", "sstv_progress",
 ]);
 
+// The decode log the Statistics page counts lives in the map module, which is
+// lazy: it arrives when the Map or Statistics tab is first opened, long after
+// the history replayed and the live decodes started coming.  Recording into a
+// module that is not there yet dropped every one of them, and nothing replayed
+// them afterwards -- so the page opened empty and only filled in from decodes
+// heard after it, which is why it took a reload (landing on the tab, so the
+// module loads at startup) to show the whole picture.  Hold them here until
+// the module arrives, then hand them over.
+interface PendingDecodeStat { kind: string; rig: string | null; tsMs: number | undefined }
+const pendingDecodeStats: PendingDecodeStat[] = [];
+// The module's own log keeps 50k entries; there is no point holding more here.
+const PENDING_DECODE_STATS_MAX = 50_000;
+
+function recordDecodeStat(kind: string, rig: string | null, tsMs?: number) {
+  const stats = window.trx.modules.map;
+  if (stats) {
+    stats.statsRecordDecode(kind, rig, tsMs);
+    return;
+  }
+  pendingDecodeStats.push({ kind, rig, tsMs });
+  if (pendingDecodeStats.length > PENDING_DECODE_STATS_MAX) {
+    pendingDecodeStats.splice(0, pendingDecodeStats.length - PENDING_DECODE_STATS_MAX);
+  }
+}
+
+function flushPendingDecodeStats() {
+  const stats = window.trx.modules.map;
+  if (!stats || pendingDecodeStats.length === 0) return;
+  for (const entry of pendingDecodeStats.splice(0)) {
+    stats.statsRecordDecode(entry.kind, entry.rig, entry.tsMs);
+  }
+  stats.scheduleStatsRender();
+}
+
+function scheduleStatsRenderIfLoaded() {
+  window.trx.modules.map?.scheduleStatsRender();
+}
+
 function dispatchDecodeMessage(msg: DecodeMessage, skipStats = false) {
   if (msg.type) window.trxPluginRuntime.dispatch(msg.type, msg);
   if (!skipStats && msg.type && !IMAGE_DECODE_KINDS.has(msg.type)) {
-    window.trx.modules.map?.statsRecordDecode(msg.type, msg.rig_id || msg.remote || null);
+    recordDecodeStat(msg.type, msg.rig_id || msg.remote || null);
-    window.trx.modules.map?.scheduleStatsRender();
+    scheduleStatsRenderIfLoaded();
   }
 }
 
@@ -6632,9 +6708,9 @@ function restoreDecodeHistoryGroup(kind: string, messages: DecodeMessage[]) {
   // Record statistics for restored history messages.
   if (!IMAGE_DECODE_KINDS.has(kind)) {
     for (const msg of messages) {
-      window.trx.modules.map?.statsRecordDecode(kind, msg.rig_id || msg.remote || null, msg.ts_ms || undefined);
+      recordDecodeStat(kind, msg.rig_id || msg.remote || null, msg.ts_ms || undefined);
     }
-    window.trx.modules.map?.scheduleStatsRender();
+    scheduleStatsRenderIfLoaded();
   }
   window.trxPluginRuntime.restore(kind, messages);
 }

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/features/navigation/routes.ts

@@ -3,7 +3,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 export const TAB_ORDER = [
-  "main", "bookmarks", "digital-modes", "map", "statistics", "recorder", "settings", "about",
+  "main", "bookmarks", "digital-modes", "map", "satellites", "statistics", "recorder", "settings", "about",
 ] as const;
 
 export type TabName = typeof TAB_ORDER[number];
@@ -13,6 +13,7 @@ export const TAB_PATHS: Readonly<Record<TabName, string>> = {
   bookmarks: "/bookmarks",
   "digital-modes": "/digital-modes",
   map: "/map",
+  satellites: "/satellites",
   statistics: "/statistics",
   recorder: "/recorder",
   settings: "/settings",

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/map-core.ts

@@ -31,7 +31,7 @@ function mapEl(id: string): MapElement {
   return element as MapElement;
 }
 
-type DecoderSource = "ais" | "vdes" | "aprs" | "bookmark" | "ft8" | "ft4" | "ft2" | "wspr" | "sat";
+type DecoderSource = "ais" | "vdes" | "aprs" | "hf_aprs" | "bookmark" | "ft8" | "ft4" | "ft2" | "wspr" | "sat";
 interface TrackPoint { lat: number; lon: number; tsMs: number }
 interface DecodeDetail {
   station?: string | null; source?: string | null; target?: string | null;
@@ -83,6 +83,9 @@ interface MapEntry {
   bookmarks?: Array<Record<string, unknown>>;
   bounds?: Leaflet.LatLngBoundsExpression;
   symbolTable?: string; symbolCode?: string; bandLabel?: string | null;
+  /** Callsign as heard.  The map key qualifies it with the source, so that a
+   *  station worked on both 144 MHz and 30 m keeps one marker per band. */
+  call?: string;
   overlay?: TrxLayer | null; line?: TrxLayer | null; labelMarker?: TrxLayer | null;
   pathKey?: string; sourceGrid?: string; targetGrid?: string;
   from?: LatLon; to?: LatLon;
@@ -171,7 +174,7 @@ interface MapWindow {
   clearMapMarkersByType?(type: DecoderSource): void;
   navigateToAprsMap?(lat: number, lon: number): void;
   navigateToMapLocator?(grid: string, preferredType?: string | null): void;
-  aprsMapAddStation?(call: string, lat: number, lon: number, info: string, symbolTable: string, symbolCode: string, packet: MapMessage): void;
+  aprsMapAddStation?(call: string, lat: number, lon: number, info: string, symbolTable: string, symbolCode: string, packet: MapMessage, source?: "aprs" | "hf_aprs"): void;
   aisMapAddVessel?(message: MapMessage): void;
   vdesMapAddPoint?(message: MapMessage): void;
   syncBookmarkMapLocators?(bookmarks: Array<Record<string, unknown>>): void;
@@ -228,7 +231,7 @@ const mapWindow = window as unknown as MapWindow;
   const decodeContactPaths = new Map<string, MapEntry>();
   let selectedMapQsoKey: string | null = null;
   const mapMarkers = new Set<TrxLayer>();
-  const DEFAULT_MAP_SOURCE_FILTER: Record<MapFilterKey, boolean> = { ais: true, vdes: true, aprs: true, bookmark: false, ft8: true, ft4: true, ft2: true, wspr: true, sat: false };
+  const DEFAULT_MAP_SOURCE_FILTER: Record<MapFilterKey, boolean> = { ais: true, vdes: true, aprs: true, hf_aprs: true, bookmark: false, ft8: true, ft4: true, ft2: true, wspr: true, sat: false };
   const mapFilter: Record<MapFilterKey, boolean> = { ...DEFAULT_MAP_SOURCE_FILTER };
   /** Chip key that clears a selection rather than naming a band or a source. */
   const MAP_FILTER_ALL_KEY = "__all";
@@ -302,6 +305,18 @@ const mapWindow = window as unknown as MapWindow;
     return trimmed;
   }
 
+  /** The source a station marker belongs to, defaulting to VHF APRS for
+   *  entries stored before HF APRS had a source of its own. */
+  function aprsEntrySource(entry: MapEntry | null | undefined): DecoderSource {
+    return entry?.type === "hf_aprs" ? "hf_aprs" : "aprs";
+  }
+
+  /** Map key for a station: the callsign alone on VHF, source-qualified on HF,
+   *  so one station heard on both bands keeps a marker for each. */
+  function aprsStationKey(call: string, source: DecoderSource): string {
+    return source === "aprs" ? call : `${source}:${call}`;
+  }
+
   function refreshAprsTrack(call: string, entry: MapEntry): void {
     if (!entry) return;
     if (!Array.isArray(entry.trackPoints) || entry.trackPoints.length < 2) {
@@ -323,7 +338,7 @@ const mapWindow = window as unknown as MapWindow;
       lineJoin: "round",
       interactive: false,
     }) as unknown as TrxLayer;
-    track.__trxType = "aprs";
+    track.__trxType = aprsEntrySource(entry);
     track._aprsCall = call;
     entry.track = track;
   }
@@ -575,6 +590,7 @@ const mapWindow = window as unknown as MapWindow;
 
   function mapSourceLabel(type: DecoderSource): string {
     if (type === "bookmark") return "Bookmarks";
+    if (type === "hf_aprs") return "HF APRS";
     return String(type || "").toUpperCase();
   }
 
@@ -594,6 +610,8 @@ const mapWindow = window as unknown as MapWindow;
     if (type === "vdes") return "#a78bfa";
     if (type === "sat") return "#f59e0b";
     if (type === "aprs") return "#00d17f";
+    // Far enough from the VHF green to tell the two apart at a glance.
+    if (type === "hf_aprs") return "#fb7185";
     return locatorFilterColor(type);
   }
 
@@ -1188,10 +1206,8 @@ const mapWindow = window as unknown as MapWindow;
       }
     }
     for (const entry of stationMarkers.values()) {
-      if (entry?.type === "aprs" && entry?.visibleInHistoryWindow) {
+      if (!entry?.visibleInHistoryWindow) continue;
-        availableSources.add("aprs");
+      availableSources.add(aprsEntrySource(entry));
-        break;
-      }
     }
     const bandMap = new Map<string, FilterChip>();
     for (const entry of locatorMarkers.values()) {
@@ -1225,7 +1241,7 @@ const mapWindow = window as unknown as MapWindow;
       if (!bandMap.has(key)) mapLocatorFilter.bands.delete(key);
     }
 
-    const sourceItems: FilterChip[] = (["ais", "vdes", "aprs", "bookmark", "ft8", "ft4", "ft2", "wspr"] as DecoderSource[])
+    const sourceItems: FilterChip[] = (["ais", "vdes", "aprs", "hf_aprs", "bookmark", "ft8", "ft4", "ft2", "wspr"] as DecoderSource[])
       .filter((key) => availableSources.has(key))
       .map((key) => ({
         key,
@@ -1296,9 +1312,10 @@ const mapWindow = window as unknown as MapWindow;
       }
       return parts.join(" ").toLowerCase();
     }
-    if (type === "aprs") {
+    if (type === "aprs" || type === "hf_aprs") {
-      const call = marker?._aprsCall ? String(marker._aprsCall) : "";
+      const key = marker?._aprsCall ? String(marker._aprsCall) : "";
-      const entry = stationMarkers.get(call);
+      const entry = stationMarkers.get(key);
+      const call = entry?.call ?? key;
       const info = entry?.info ? String(entry.info) : "";
       const pktRaw = entry?.pkt?.raw ? String(entry.pkt.raw) : "";
       return `${call} ${info} ${pktRaw}`.toLowerCase();
@@ -1496,9 +1513,10 @@ const mapWindow = window as unknown as MapWindow;
   };
 
   mapWindow.clearMapMarkersByType = function(type) {
-    if (type === "aprs") {
+    if (type === "aprs" || type === "hf_aprs") {
       selectedAprsTrackCall = null;
-      stationMarkers.forEach((entry) => {
+      stationMarkers.forEach((entry, key) => {
+        if (aprsEntrySource(entry) !== type) return;
         if (entry && entry.marker) {
           if (aprsMap && aprsMap.hasLayer(entry.marker)) entry.marker.removeFrom(aprsMap);
           mapMarkers.delete(entry.marker);
@@ -1507,8 +1525,8 @@ const mapWindow = window as unknown as MapWindow;
           if (aprsMap && aprsMap.hasLayer(entry.track)) entry.track.removeFrom(aprsMap);
           mapMarkers.delete(entry.track);
         }
+        stationMarkers.delete(key);
       });
-      stationMarkers.clear();
       return;
     }
 
@@ -1781,13 +1799,15 @@ const mapWindow = window as unknown as MapWindow;
         if (!ll) return;
         const entry = stationMarkers.get(marker._aprsCall);
         if (!entry) return;
-        e.popup.setContent(buildAprsPopupHtml(marker._aprsCall, ll.lat, ll.lng, entry.info || "", entry.pkt));
+        const source = aprsEntrySource(entry);
+        const call = entry.call ?? String(marker._aprsCall);
+        e.popup.setContent(buildAprsPopupHtml(call, ll.lat, ll.lng, entry.info || "", entry.pkt));
         refreshAprsTrack(String(marker._aprsCall), entry);
-        if (entry.track && aprsMap && mapFilter.aprs && !aprsMap.hasLayer(entry.track)) {
+        if (entry.track && aprsMap && mapFilter[source] && !aprsMap.hasLayer(entry.track)) {
           entry.track.addTo(aprsMap);
         }
         selectedAprsTrackCall = String(marker._aprsCall);
-        setMapRadioPathTo(ll.lat, ll.lng, mapSourceColor("aprs"), "aprs-radio-path", marker.__trxRigIds);
+        setMapRadioPathTo(ll.lat, ll.lng, mapSourceColor(source), "aprs-radio-path", marker.__trxRigIds);
         return;
       }
 
@@ -2270,28 +2290,33 @@ const mapWindow = window as unknown as MapWindow;
     return null;
   }
 
-  function _aprsAddMarkerToMap(call: string, entry: MapEntry): void {
+  function _aprsAddMarkerToMap(key: string, entry: MapEntry): void {
     if (!aprsMap || entry.lat == null || entry.lon == null) return;
-    refreshAprsTrack(call, entry);
+    refreshAprsTrack(key, entry);
+    const source = aprsEntrySource(entry);
+    const call = entry.call ?? key;
     const icon = aprsSymbolIcon(entry.symbolTable ?? "", entry.symbolCode ?? "");
     const popupContent = buildAprsPopupHtml(call, entry.lat, entry.lon, entry.info || "", entry.pkt);
+    const color = mapSourceColor(source);
     const marker = (icon
       ? L.marker([entry.lat, entry.lon], { icon }).addTo(aprsMap).bindPopup(popupContent)
       : L.circleMarker([entry.lat, entry.lon], {
-          radius: 6, color: "#00d17f", fillColor: "#00d17f", fillOpacity: 0.8
+          radius: 6, color, fillColor: color, fillOpacity: 0.8
         }).addTo(aprsMap).bindPopup(popupContent)) as unknown as TrxLayer;
-    marker.__trxType = "aprs";
+    marker.__trxType = source;
     marker.__trxRigIds = entry.rigIds || new Set();
-    marker._aprsCall = call;
+    marker._aprsCall = key;
     entry.marker = marker;
     mapMarkers.add(marker);
   }
 
-  mapWindow.aprsMapAddStation = function(call, lat, lon, info, symbolTable, symbolCode, pkt) {
+  mapWindow.aprsMapAddStation = function(call, lat, lon, info, symbolTable, symbolCode, pkt, source) {
     const nextPoint: Leaflet.LatLngTuple = [lat, lon];
     const tsMs = Number.isFinite(pkt?._tsMs) ? Number(pkt._tsMs) : Date.now();
     const msgRigId = pkt?.rig_id || T.lastActiveRigId;
-    const existing = stationMarkers.get(call);
+    const stationSource: DecoderSource = source === "hf_aprs" ? "hf_aprs" : "aprs";
+    const key = aprsStationKey(call, stationSource);
+    const existing = stationMarkers.get(key);
     if (existing) {
       existing.pkt = pkt;
       existing.lat = lat;
@@ -2310,7 +2335,8 @@ const mapWindow = window as unknown as MapWindow;
       } else if (prevPoint) {
         prevPoint.tsMs = tsMs;
       }
-      pruneAprsEntry(call, existing, mapHistoryCutoffMs());
+      existing.call = call;
+      pruneAprsEntry(key, existing, mapHistoryCutoffMs());
       if (aprsMap && existing.marker && !T.decodeHistoryReplayActive) {
         existing.marker.setLatLng([lat, lon]);
         existing.marker.setPopupContent(buildAprsPopupHtml(call, lat, lon, info, pkt));
@@ -2321,7 +2347,8 @@ const mapWindow = window as unknown as MapWindow;
         track: null,
         trackHistory: [{ lat, lon, tsMs }],
         trackPoints: [nextPoint],
-        type: "aprs",
+        type: stationSource,
+        call,
         pkt,
         lat,
         lon,
@@ -2330,9 +2357,9 @@ const mapWindow = window as unknown as MapWindow;
         symbolCode,
         rigIds: new Set(msgRigId ? [msgRigId] : []),
       };
-      stationMarkers.set(call, entry);
+      stationMarkers.set(key, entry);
-      pruneAprsEntry(call, entry, mapHistoryCutoffMs());
+      pruneAprsEntry(key, entry, mapHistoryCutoffMs());
-      if (entry.visibleInHistoryWindow) ensureAprsMarker(call, entry);
+      if (entry.visibleInHistoryWindow) ensureAprsMarker(key, entry);
       if (aprsMap) scheduleDecodeMapMaintenance();
     }
   };

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugin-loader.ts

@@ -2,7 +2,9 @@
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-type PluginGroup = "digital-modes" | "map-data" | "map" | "statistics" | "bookmarks" | "recorder" | "settings";
+type PluginGroup =
+  | "digital-modes" | "map-data" | "map" | "satellites" | "statistics"
+  | "bookmarks" | "recorder" | "settings";
 
 const pluginGroups: Readonly<Record<PluginGroup, readonly string[]>> = {
   // AIS, VDES and the two APRS decoders have panels on this tab, so they load
@@ -15,6 +17,7 @@ const pluginGroups: Readonly<Record<PluginGroup, readonly string[]>> = {
   ],
   "map-data": ["/map-core.js", "/ais.js", "/vdes.js", "/aprs.js", "/hf-aprs.js"],
   map: ["/map-core.js", "/ais.js", "/vdes.js", "/aprs.js", "/hf-aprs.js", "/sat.js", "/sat-scheduler.js"],
+  satellites: ["/satellite-predictions.js"],
   statistics: ["/map-core.js"],
   bookmarks: ["/bookmarks.js"],
   recorder: [],

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugin-runtime.ts

@@ -81,6 +81,7 @@ const runtime: TrxPluginRuntime = {
     plugin.prune();
     return true;
   },
+  rerenderAll() { for (const plugin of decoders.values()) plugin.rerender?.(); },
   syncMapAll() { for (const plugin of decoders.values()) plugin.syncMap?.(); },
   clearQueued() { queued.clear(); },
   hasDecoder: (id) => decoders.has(id),

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/active-rig.ts

@@ -0,0 +1,26 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+import { hostState } from "./host.js";
+
+// The decode stream is not rig-scoped: every rig a client is connected to sends
+// its decodes to every browser, each frame naming the rig that heard it (the
+// client stamps `rig_id` as it leaves the audio connection).  The map wants all
+// of them — it has its own filter, and plotting only one rig would empty it —
+// but the radio page and the decoder panels describe one rig at a time: the one
+// the operator selected, whose spectrum is on screen and whose audio is
+// playing.  A frame a background rig copied on another band belongs to neither
+// picture, so both filter on this.
+export function isActiveRigDecode(rigId: string | null | undefined): boolean {
+  const activeRigId = hostState.lastActiveRigId;
+  // Before the rig list has arrived, and for a decode that reached the browser
+  // without a rig of its own, there is nothing to disagree with.
+  if (!activeRigId || !rigId) return true;
+  return rigId === activeRigId;
+}
+
+/** The decodes of `items` that the selected rig heard, in their original order. */
+export function forActiveRig<T extends { rig_id?: string | null | undefined }>(items: T[]): T[] {
+  return items.filter((item) => isActiveRigDecode(item.rig_id));
+}

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/ais.ts

@@ -6,6 +6,7 @@ import { hostCore, hostState } from "./host.js";
 
 export {};
 
+import { forActiveRig, isActiveRigDecode } from "./active-rig.js";
 import type { PluginRuntimeWindow } from "./runtime-contract";
 
 interface AisMessage {
@@ -190,20 +191,27 @@ function aisLatestByVessel(messages: AisMessage[]): AisMessage[] {
   return Array.from(byMmsi.values());
 }
 
+/** What the selected rig heard.  The history holds every rig's traffic, for
+ *  the map; the panel is about the rig the operator is working. */
+function aisRigMessages(): AisMessage[] {
+  return forActiveRig(aisMessageHistory);
+}
+
 function updateAisSummary() {
   const plan = currentAisChannelPlan();
   if (aisChannelSummaryEl) {
     aisChannelSummaryEl.textContent = `A ${formatAisMhz(plan.aHz)} · B ${formatAisMhz(plan.bHz)}`;
   }
 
-  const vessels = aisLatestByVessel(aisMessageHistory);
+  const rigMessages = aisRigMessages();
+  const vessels = aisLatestByVessel(rigMessages);
   if (aisVesselCountEl) {
     const count = vessels.length;
     aisVesselCountEl.textContent = `${count} vessel${count === 1 ? "" : "s"}`;
   }
 
   if (aisLatestSeenEl) {
-    const latest = aisMessageHistory[0];
+    const latest = rigMessages[0];
     if (!latest) {
       aisLatestSeenEl.textContent = "No traffic yet";
     } else {
@@ -314,7 +322,9 @@ function updateAisBar() {
 
   const isAis = ((document.getElementById("mode") as HTMLSelectElement | null)?.value || "").toUpperCase() === "AIS";
   const cutoffMs = Date.now() - AIS_BAR_WINDOW_MS;
-  const recent = aisMessageHistory.filter((msg) => (msg._tsMs ?? 0) >= cutoffMs);
+  const recent = aisMessageHistory.filter(
+    (msg) => (msg._tsMs ?? 0) >= cutoffMs && isActiveRigDecode(msg.rig_id),
+  );
   const messages = aisLatestByVessel(recent).slice(0, 8);
   if (!isAis || messages.length === 0) {
     aisBarOverlay.style.display = "none";
@@ -368,7 +378,7 @@ function renderAisHistory() {
     return;
   }
   const fragment = document.createDocumentFragment();
-  for (const message of aisMessageHistory) {
+  for (const message of aisRigMessages()) {
     fragment.appendChild(renderAisRow(message));
   }
   aisMessagesEl.replaceChildren(fragment);
@@ -407,10 +417,11 @@ function normalizeServerAisMessage(msg: AisMessage): AisMessage {
 
 function onServerAisBatch(messages: AisMessage[]): void {
   if (!Array.isArray(messages) || messages.length === 0) return;
-  if (aisStatus) aisStatus.textContent = "Receiving";
   const normalized: AisMessage[] = [];
   for (const msg of messages) {
     const next = normalizeServerAisMessage(msg);
+    // "Receiving" is the panel's own status, and the panel is the rig's.
+    if (aisStatus && isActiveRigDecode(next.rig_id)) aisStatus.textContent = "Receiving";
     const tsMs = Number.isFinite(next.ts_ms) ? Number(next.ts_ms) : Date.now();
     next._tsMs = tsMs;
     next._ts = new Date(tsMs).toLocaleTimeString([], {
@@ -452,8 +463,9 @@ if (aisFilterInput) {
 }
 
 function onServerAis(msg: AisMessage): void {
-  if (aisStatus) aisStatus.textContent = "Receiving";
+  const message = normalizeServerAisMessage(msg);
-  addAisMessage(normalizeServerAisMessage(msg));
+  if (aisStatus && isActiveRigDecode(message.rig_id)) aisStatus.textContent = "Receiving";
+  addAisMessage(message);
 }
 
 updateAisSummary();
@@ -464,6 +476,7 @@ updateAisSummary();
   restore: onServerAisBatch,
   reset: resetAisHistoryView,
   prune: pruneAisHistoryView,
+  rerender: () => { updateAisBar(); renderAisHistory(); },
   // Oldest first, so vessel tracks are rebuilt in the order they happened.
   syncMap: () => { for (const entry of [...aisMessageHistory].reverse()) plotAisMessage(entry); },
 });

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/aprs.ts

@@ -4,6 +4,7 @@
 
 import { hostCore, hostState } from "./host.js";
 
+import { forActiveRig, isActiveRigDecode } from "./active-rig.js";
 import {
   aprsAgeText,
   aprsPacketCategory,
@@ -106,21 +107,29 @@ function aprsFilterMatch(pkt: AprsPacket): boolean {
   return haystack.includes(aprsFilterText);
 }
 
+/** What the selected rig heard.  The history holds every rig's traffic, for
+ *  the map; the panel is about the rig the operator is working. */
+function aprsRigPackets(): AprsPacket[] {
+  return forActiveRig(aprsPacketHistory);
+}
+
 function aprsVisiblePackets(): AprsPacket[] {
-  const packets = aprsCollapseDup ? collapseAprsDuplicates(aprsPacketHistory) : aprsPacketHistory;
+  const rigPackets = aprsRigPackets();
+  const packets = aprsCollapseDup ? collapseAprsDuplicates(rigPackets) : rigPackets;
   return packets.filter(aprsFilterMatch);
 }
 
 function updateAprsSummary() {
+  const rigPackets = aprsRigPackets();
   const visible = aprsVisiblePackets();
   if (aprsTotalCountEl) {
-    aprsTotalCountEl.textContent = `${aprsPacketHistory.length} total`;
+    aprsTotalCountEl.textContent = `${rigPackets.length} total`;
   }
   if (aprsVisibleCountEl) {
     aprsVisibleCountEl.textContent = `${visible.length} shown`;
   }
   if (aprsLatestSeenEl) {
-    const latest = aprsPacketHistory[0];
+    const latest = rigPackets[0];
     if (!latest) {
       aprsLatestSeenEl.textContent = "No packets yet";
     } else {
@@ -179,7 +188,9 @@ function updateAprsBar() {
   if (!aprsBarOverlay) return;
   const isPkt = ((document.getElementById("mode") as HTMLSelectElement | null)?.value || "").toUpperCase() === "PKT";
   const cutoffMs = Date.now() - APRS_BAR_WINDOW_MS;
-  const okFrames = aprsPacketHistory.filter((p) => p.crcOk && (p._tsMs ?? 0) >= cutoffMs);
+  const okFrames = aprsPacketHistory.filter(
+    (p) => p.crcOk && (p._tsMs ?? 0) >= cutoffMs && isActiveRigDecode(p.rig_id),
+  );
   const frames = collapseAprsDuplicates(okFrames).slice(0, 8);
   const newestTsMs = frames.reduce((latest, pkt) => Math.max(latest, Number(pkt._tsMs) || 0), 0);
   if (!isPkt || frames.length === 0 || newestTsMs <= aprsBarDismissedAtMs) {
@@ -256,11 +267,12 @@ function normalizeServerAprsPacket(pkt: AprsPacket): AprsPacket {
 
 function onServerAprsBatch(packets: AprsPacket[]): void {
   if (!Array.isArray(packets) || packets.length === 0) return;
-  if (aprsStatus) aprsStatus.textContent = "Receiving";
   const normalized: AprsPacket[] = [];
   let hasCrcOk = false;
   for (const pkt of packets) {
     const next = normalizeServerAprsPacket(pkt);
+    // "Receiving" is the panel's own status, and the panel is the rig's.
+    if (aprsStatus && isActiveRigDecode(next.rig_id)) aprsStatus.textContent = "Receiving";
     const tsMs = Number.isFinite(next.ts_ms) ? Number(next.ts_ms) : Date.now();
     next._tsMs = tsMs;
     next._ts = new Date(tsMs).toLocaleTimeString([], { hour: "2-digit", minute: "2-digit", second: "2-digit" });
@@ -324,8 +336,9 @@ if (aprsFilterInput) {
 
 // --- Server-side APRS decode handler ---
 function onServerAprs(pkt: AprsPacket): void {
-  if (aprsStatus) aprsStatus.textContent = "Receiving";
+  const packet = normalizeServerAprsPacket(pkt);
-  addAprsPacket(normalizeServerAprsPacket(pkt));
+  if (aprsStatus && isActiveRigDecode(packet.rig_id)) aprsStatus.textContent = "Receiving";
+  addAprsPacket(packet);
 }
 
 renderAprsHistory();
@@ -336,6 +349,7 @@ renderAprsHistory();
   restore: onServerAprsBatch,
   reset: resetAprsHistoryView,
   prune: pruneAprsHistoryView,
+  rerender: () => { updateAprsBar(); renderAprsHistory(); },
   // Oldest first, so station tracks are rebuilt in the order they happened.
   syncMap: () => { for (const entry of [...aprsPacketHistory].reverse()) plotAprsPacket(entry); },
 });

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/background-decode.ts

@@ -66,10 +66,17 @@ const bgdWindow = window as unknown as BackgroundBridge;
   let bookmarkList: Bookmark[] = [];
   let statusInterval: ReturnType<typeof setInterval> | null = null;
   let bgdDirty = false;
+  /** Last polled state per bookmark, so a row can say what it is doing. */
+  let statusByBookmark = new Map<string, BackgroundStatusEntry>();
+  let lastStatus: BackgroundDecodeStatus | null = null;
 
   function initBackgroundDecode(rigId: string | null, role: string | null): void {
     backgroundDecodeRole = role;
-    currentRigId = rigId || null;
+    // The panel used to take whatever rig it was handed at load and wait to be
+    // told again.  Loading before the rig list arrives handed it null, and the
+    // next telling only came when the operator switched rigs, so the panel sat
+    // empty and silent.  The host knows the rig; ask it.
+    currentRigId = rigId || hostState.lastActiveRigId || null;
     if (currentRigId) loadBackgroundDecode();
     startStatusPolling();
   }
@@ -171,7 +178,7 @@ const bgdWindow = window as unknown as BackgroundBridge;
     setCheckbox("background-decode-enabled", currentConfig.enabled);
     renderBookmarkChecklist();
 
-    const isControl = backgroundDecodeRole === "control" || hostState.authEnabled === false;
+    const isControl = isControlRole();
     const panel = document.getElementById("background-decode-panel");
     if (panel) {
         panel.querySelectorAll<HTMLInputElement | HTMLSelectElement | HTMLButtonElement>("input, select, button.sch-write").forEach(function (el) {
@@ -182,6 +189,11 @@ const bgdWindow = window as unknown as BackgroundBridge;
     const resetBtn = document.getElementById("background-decode-reset-btn");
     if (saveBtn) saveBtn.style.display = isControl ? "" : "none";
     if (resetBtn) resetBtn.style.display = isControl ? "" : "none";
+    syncSaveButton();
+  }
+
+  function currentFilterText(): string {
+    return (document.getElementById("bgd-bookmark-filter") as HTMLInputElement | null)?.value ?? "";
   }
 
   function renderBookmarkChecklist(filterText = ""): void {
@@ -203,26 +215,65 @@ const bgdWindow = window as unknown as BackgroundBridge;
       : all;
 
     if (filtered.length === 0) {
-      container.innerHTML = '<div class="bgd-checklist-empty">' +
+      container.innerHTML = '<div class="bgd-checklist-empty">' + escHtml(emptyListText(all.length)) + "</div>";
-        (all.length === 0 ? "No supported bookmarks available." : "No bookmarks match filter.") +
+      renderSelectionSummary();
-        '</div>';
       return;
     }
 
     filtered.forEach(function (bookmark) {
       const row = document.createElement("label");
       row.className = "bgd-checklist-row";
+      row.dataset.bmId = bookmark.id;
       const decoders = bookmarkDecoderKinds(bookmark);
-      const checked = selectedIds.has(bookmark.id) ? " checked" : "";
+      const selected = selectedIds.has(bookmark.id);
+      if (selected) row.classList.add("is-selected");
       row.innerHTML =
-        '<input type="checkbox"' + checked + ' data-bm-id="' + escHtml(bookmark.id) + '" />' +
+        '<input type="checkbox"' + (selected ? " checked" : "") + ' data-bm-id="' + escHtml(bookmark.id) + '" />' +
         '<span class="bgd-checklist-name">' + escHtml(bookmark.name) + '</span>' +
-        '<span class="bgd-checklist-meta">' + escHtml(formatFreq(bookmark.freq_hz) + " " + bookmark.mode + " · " + decoders.join("/").toUpperCase()) + '</span>';
+        '<span class="bgd-checklist-meta">'
+          + escHtml(formatFreq(bookmark.freq_hz)) + '<span class="bgd-checklist-mode">'
+          + escHtml(bookmark.mode + " · " + decoders.join("/").toUpperCase()) + '</span></span>'
+        + stateBadgeHtml(bookmark.id, selected);
       row.querySelector<HTMLInputElement>("input")?.addEventListener("change", function (e) {
         onChecklistToggle(bookmark.id, (e.currentTarget as HTMLInputElement).checked);
       });
       container.appendChild(row);
     });
+    renderSelectionSummary();
+  }
+
+  /** Why the list is empty, in the terms the operator can act on. */
+  function emptyListText(supportedCount: number): string {
+    if (supportedCount > 0) return "No bookmark matches that filter.";
+    if (bookmarkList.length > 0) {
+      return "None of your bookmarks name a decoder that can run in the background."
+        + " Give one a decoder on the Bookmarks tab to list it here.";
+    }
+    return "No bookmarks yet. Save one on the Bookmarks tab and it can be decoded here.";
+  }
+
+  /** The live state of a selected bookmark, as the row's own badge. */
+  function stateBadgeHtml(bookmarkId: string, selected: boolean): string {
+    if (!selected) return '<span class="bgd-state" data-state="unselected"></span>';
+    const entry = statusByBookmark.get(bookmarkId);
+    const state = entry?.state ?? (currentConfig?.enabled ? "pending" : "disabled");
+    return '<span class="bgd-state" data-state="' + escHtml(state) + '" title="' + escHtml(stateHelp(state)) + '">'
+      + '<span class="bgd-state-dot"></span>' + escHtml(prettyState(state)) + "</span>";
+  }
+
+  function renderSelectionSummary(): void {
+    const el = document.getElementById("bgd-selection-summary");
+    if (!el) return;
+    const selected = currentConfig?.bookmark_ids.length ?? 0;
+    if (selected === 0) {
+      el.textContent = "Nothing selected — background decoding is idle.";
+      return;
+    }
+    const active = [...statusByBookmark.values()].filter((entry) => entry.state === "active").length;
+    const noun = `${String(selected)} bookmark${selected === 1 ? "" : "s"} selected`;
+    el.textContent = currentConfig?.enabled
+      ? `${noun}, ${String(active)} decoding now.`
+      : `${noun}. Switch Enabled on to start decoding them.`;
   }
 
   function onChecklistToggle(bookmarkId: string, checked: boolean): void {
@@ -260,7 +311,7 @@ const bgdWindow = window as unknown as BackgroundBridge;
         showToast(`Save failed: ${errorMessage(err)}`, true);
       })
       .finally(function () {
-        if (btn) btn.disabled = false;
+        syncSaveButton();
       });
   }
 
@@ -295,58 +346,77 @@ const bgdWindow = window as unknown as BackgroundBridge;
   }
 
   function renderStatus(status: BackgroundDecodeStatus): void {
-    const card = document.getElementById("background-decode-status-card");
+    lastStatus = status;
-    if (!card) return;
+    statusByBookmark = new Map(
-    const entries = status.entries ?? [];
+      (status.entries ?? [])
-    if (!entries.length) {
+        .filter((entry) => typeof entry.bookmark_id === "string" && entry.bookmark_id.length > 0)
-      card.textContent = "No background decode bookmarks configured.";
+        .map((entry) => [entry.bookmark_id as string, entry]),
-      return;
+    );
-    }
+    renderSpanSummary();
-    const summary = [];
+    // Rows carry the state, so the list repaints — keeping the filter the
-    if (status.active_rig) {
+    // operator typed and the selection they have not saved yet.
-      if (typeof status.center_hz === "number" && Number.isFinite(status.center_hz)) summary.push("Center " + formatFreq(status.center_hz));
+    renderBookmarkChecklist(currentFilterText());
-      if (typeof status.sample_rate === "number" && Number.isFinite(status.sample_rate) && status.sample_rate > 0) summary.push("Span ±" + formatFreq(status.sample_rate / 2));
-    } else {
-      summary.push("This rig is not currently selected for audio.");
-    }
-    let html = summary.length ? '<div style="margin-bottom:0.8rem;color:var(--text-muted);">' + escHtml(summary.join(" · ")) + "</div>" : "";
-    html += '<div class="bgd-status-list">';
-    entries.forEach(function (entry) {
-      const name = entry.bookmark_name || entry.bookmark_id || "Unknown bookmark";
-      const parts = [];
-      if (typeof entry.freq_hz === "number" && Number.isFinite(entry.freq_hz)) parts.push(formatFreq(entry.freq_hz));
-      if (entry.mode) parts.push(entry.mode);
-      if (Array.isArray(entry.decoder_kinds) && entry.decoder_kinds.length) {
-        parts.push(entry.decoder_kinds.join("/").toUpperCase());
-      }
-      html +=
-        '<div class="bgd-status-row">' +
-          '<div>' +
-            '<div class="bgd-status-name">' + escHtml(name) + '</div>' +
-            '<div class="bgd-status-meta">' + escHtml(parts.join(" · ")) + '</div>' +
-          '</div>' +
-          '<div class="bgd-status-state" data-state="' + escHtml(entry.state || "inactive") + '">' +
-            '<svg class="bgd-state-dot" viewBox="0 0 8 8"><circle cx="4" cy="4" r="3.5"/></svg>' +
-            escHtml(prettyState(entry.state)) + '</div>' +
-        '</div>';
-    });
-    html += "</div>";
-    card.innerHTML = html;
   }
 
+  /** What the rig is listening across, which is what decides whether a
+   *  selected bookmark can be decoded at all. */
+  function renderSpanSummary(): void {
+    const el = document.getElementById("bgd-span-summary");
+    if (!el) return;
+    const status = lastStatus;
+    if (!status) {
+      el.textContent = "";
+      return;
+    }
+    if (!status.active_rig) {
+      el.textContent = "This rig is not the one playing audio.";
+      el.dataset.tone = "warn";
+      return;
+    }
+    const centre = typeof status.center_hz === "number" && Number.isFinite(status.center_hz)
+      ? formatFreq(status.center_hz)
+      : null;
+    const half = typeof status.sample_rate === "number" && Number.isFinite(status.sample_rate) && status.sample_rate > 0
+      ? formatFreq(status.sample_rate / 2)
+      : null;
+    el.dataset.tone = "";
+    el.textContent = centre && half ? `Span ${centre} ±${half}` : centre ? `Centre ${centre}` : "";
+  }
+
+  /** The one-line reason behind a state, for the row's tooltip. */
+  function stateHelp(state: string | undefined): string {
+    switch (state) {
+      case "active": return "Decoding on a hidden channel.";
+      case "out_of_span": return "Outside the span the rig is tuned across, so it cannot be heard from here.";
+      case "waiting_for_spectrum": return "Waiting for the first spectrum frame from the rig.";
+      case "waiting_for_user": return "Nobody is listening to this rig, so no audio is being pulled.";
+      case "missing_bookmark": return "The bookmark this was selected from is gone.";
+      case "no_supported_decoders": return "No decoder that runs in the background can decode this bookmark.";
+      case "disabled": return "Background decoding is switched off.";
+      case "handled_by_scheduler":
+      case "scheduler_has_control": return "The scheduler is running this bookmark instead.";
+      case "handled_by_virtual_channel": return "A virtual channel is already on this frequency.";
+      case "pending": return "Selected, and not started yet — save to apply.";
+      default: return "Selected, but not decoding.";
+    }
+  }
+
+  // The dot beside the word already says whether this is running, so the
+  // words no longer carry a tick or a triangle of their own.
   function prettyState(state: string | undefined): string {
     switch (state) {
-      case "active": return "\u2713 Active";
+      case "active": return "Decoding";
-      case "out_of_span": return "\u25B3 Out of span";
+      case "out_of_span": return "Out of span";
-      case "waiting_for_spectrum": return "\u25B3 Waiting";
+      case "waiting_for_spectrum": return "Waiting for spectrum";
-      case "waiting_for_user": return "\u25B3 No user";
+      case "waiting_for_user": return "Nobody listening";
-      case "missing_bookmark": return "\u2717 Missing";
+      case "missing_bookmark": return "Bookmark gone";
-      case "no_supported_decoders": return "\u2717 Unsupported";
+      case "no_supported_decoders": return "No decoder";
-      case "disabled": return "\u25B3 Disabled";
+      case "disabled": return "Off";
-      case "handled_by_scheduler": return "\u25B3 Scheduler";
+      case "handled_by_scheduler":
-      case "scheduler_has_control": return "\u25B3 Scheduler";
+      case "scheduler_has_control": return "Scheduler has it";
-      case "handled_by_virtual_channel": return "\u25B3 VChan";
+      case "handled_by_virtual_channel": return "On a channel";
-      default: return "\u25B3 Inactive";
+      case "pending": return "Not saved";
+      default: return "Idle";
     }
   }
 
@@ -380,14 +450,25 @@ const bgdWindow = window as unknown as BackgroundBridge;
   function markBgdDirty() {
     if (bgdDirty) return;
     bgdDirty = true;
-    const btn = document.getElementById("background-decode-save-btn");
+    syncSaveButton();
-    if (btn) btn.classList.add("sch-dirty");
   }
 
   function clearBgdDirty() {
     bgdDirty = false;
-    const btn = document.getElementById("background-decode-save-btn");
+    syncSaveButton();
-    if (btn) btn.classList.remove("sch-dirty");
+  }
+
+  /** Save offers itself only when there is something to save. */
+  function syncSaveButton() {
+    const btn = document.getElementById("background-decode-save-btn") as HTMLButtonElement | null;
+    if (!btn) return;
+    btn.classList.toggle("sch-dirty", bgdDirty);
+    btn.disabled = !bgdDirty || !isControlRole();
+    btn.title = bgdDirty ? "Apply these bookmarks to the background decoder" : "No changes to save";
+  }
+
+  function isControlRole(): boolean {
+    return backgroundDecodeRole === "control" || hostState.authEnabled === false;
   }
 
   function showToast(msg: string, isError: boolean): void {
@@ -407,7 +488,7 @@ const bgdWindow = window as unknown as BackgroundBridge;
     }
     const ids = supportedBookmarks().map(function (bm) { return bm.id; });
     currentConfig.bookmark_ids = ids;
-    renderBookmarkChecklist((document.getElementById("bgd-bookmark-filter") as HTMLInputElement | null)?.value);
+    renderBookmarkChecklist(currentFilterText());
     markBgdDirty();
   }
 
@@ -416,7 +497,7 @@ const bgdWindow = window as unknown as BackgroundBridge;
       currentConfig = { remote: currentRigId, enabled: false, bookmark_ids: [] };
     }
     currentConfig.bookmark_ids = [];
-    renderBookmarkChecklist((document.getElementById("bgd-bookmark-filter") as HTMLInputElement | null)?.value);
+    renderBookmarkChecklist(currentFilterText());
     markBgdDirty();
   }
 
@@ -432,7 +513,11 @@ const bgdWindow = window as unknown as BackgroundBridge;
     const enabledCb = document.getElementById("background-decode-enabled") as (HTMLInputElement & WiredElement) | null;
     if (enabledCb && !enabledCb._wired) {
       enabledCb._wired = true;
-      enabledCb.addEventListener("change", function () { markBgdDirty(); });
+      enabledCb.addEventListener("change", function () {
+        if (currentConfig) currentConfig.enabled = enabledCb.checked;
+        markBgdDirty();
+        renderBookmarkChecklist(currentFilterText());
+      });
     }
 
     const selectAllBtn = document.getElementById("bgd-select-all-btn") as WiredElement | null;

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/cw.ts

@@ -4,6 +4,7 @@
 
 import { hostCore } from "./host.js";
 
+import { isActiveRigDecode } from "./active-rig.js";
 import type { PluginRuntimeWindow } from "./runtime-contract.js";
 
 export {};
@@ -20,8 +21,11 @@ interface CwRenderer {
   drawPoints(points: number[], size: number, color: Rgba): void;
 }
 interface CwSpectrum { bins: number[]; sample_rate: number; center_hz: number }
-interface CwEvent { text?: string; wpm?: number; tone_hz?: number; signal_on?: boolean }
+interface CwEvent { rig_id?: string | null; text?: string; wpm?: number; tone_hz?: number; signal_on?: boolean }
-interface CwLine { tsMs: number; ts: string; text: string; wpm: number | null; tone_hz: number | null; lastMs: number }
+interface CwLine {
+  rigId: string | null; tsMs: number; ts: string; text: string;
+  wpm: number | null; tone_hz: number | null; lastMs: number;
+}
 interface CwToneRange {
   tunedHz: number; bandwidthHz: number; toneMinHz: number; toneMaxHz: number;
   toneSpanHz: number; lowerSideband: boolean; mode: string;
@@ -66,7 +70,10 @@ const CW_BAR_LINE_GAP_MS = 5000;
 let cwLastAppendTime = 0;
 let cwTonePickerRaf: number | null = null;
 let cwBarHistory: CwLine[] = [];
-let cwBarCurrentLine: CwLine | null = null;
+// One line in progress per rig, keyed by rig id ("" for a decode that names no
+// rig).  Two rigs copying at the same time each fill their own line instead of
+// braiding their characters into one.
+const cwBarCurrentLines = new Map<string, CwLine>();
 let cwBarDismissedAtMs = 0;
 // Tracks a user-initiated auto toggle that is in-flight (POST not yet
 // acknowledged).  While set, server-state updates must not override the
@@ -101,12 +108,13 @@ cwWindow.applyCwAutoUiFromServer = function(enabled: boolean) {
   applyCwAutoUi(enabled);
 };
 
-function cwBarFlushCurrentLine(): void {
+function cwBarFlushCurrentLine(key: string): void {
-  if (cwBarCurrentLine && cwBarCurrentLine.text.trim()) {
+  const line = cwBarCurrentLines.get(key);
-    cwBarHistory.unshift(cwBarCurrentLine);
+  cwBarCurrentLines.delete(key);
+  if (line?.text.trim()) {
+    cwBarHistory.unshift(line);
     if (cwBarHistory.length > 50) cwBarHistory.length = 50;
   }
-  cwBarCurrentLine = null;
 }
 
 function updateCwBar(): void {
@@ -114,9 +122,12 @@ function updateCwBar(): void {
   const mode = ((document.getElementById("mode") as HTMLSelectElement | null)?.value || "").toUpperCase();
   const isCw = mode === "CW" || mode === "CWR";
   const cutoffMs = Date.now() - CW_BAR_WINDOW_MS;
-  const recent = cwBarHistory.filter((l) => l.tsMs >= cutoffMs);
+  const recent = cwBarHistory.filter((l) => l.tsMs >= cutoffMs && isActiveRigDecode(l.rigId));
-  // Prepend the in-progress line so characters appear immediately
+  // Prepend the in-progress lines so characters appear immediately
-  const liveLines = cwBarCurrentLine && cwBarCurrentLine.text ? [cwBarCurrentLine, ...recent] : recent;
+  const inProgress = [...cwBarCurrentLines.values()]
+    .filter((l) => l.text && isActiveRigDecode(l.rigId))
+    .sort((a, b) => b.tsMs - a.tsMs);
+  const liveLines = [...inProgress, ...recent];
   const newestTsMs = liveLines.reduce((latest, line) => Math.max(latest, line.tsMs || 0), 0);
   if (!isCw || liveLines.length === 0 || newestTsMs <= cwBarDismissedAtMs) {
     cwBarOverlay.style.display = "none";
@@ -402,7 +413,7 @@ function resetCwHistoryView(): void {
   if (cwOutputEl) cwOutputEl.innerHTML = "";
   cwLastAppendTime = 0;
   cwBarHistory = [];
-  cwBarCurrentLine = null;
+  cwBarCurrentLines.clear();
   updateCwBar();
   drawCwTonePicker();
 }
@@ -421,8 +432,13 @@ document.getElementById("settings-clear-cw-history")?.addEventListener("click",
 
 // --- Server-side CW decode handler ---
 function onServerCw(evt: CwEvent): void {
-  if (cwStatusEl) cwStatusEl.textContent = "Receiving";
+  // The panel is a single stream of copied text: characters from a background
-  if (evt.text && cwOutputEl) {
+  // rig do not belong in it at all, and interleaving them would make both
+  // rigs unreadable.  The bar histories below keep every rig, each on its own
+  // line, and pick out the selected rig when they paint.
+  const forSelectedRig = isActiveRigDecode(evt.rig_id ?? null);
+  if (cwStatusEl && forSelectedRig) cwStatusEl.textContent = "Receiving";
+  if (evt.text && cwOutputEl && forSelectedRig) {
     // Append decoded text to output
     const now = Date.now();
     if (!cwOutputEl.lastElementChild || now - cwLastAppendTime > 10000 || evt.text === "\n") {
@@ -445,25 +461,29 @@ function onServerCw(evt: CwEvent): void {
   // Bar history accumulation (regardless of pause state)
   if (evt.text) {
     const now = Date.now();
+    const rigId = evt.rig_id ?? null;
+    const key = rigId ?? "";
     if (evt.text === "\n") {
-      cwBarFlushCurrentLine();
+      cwBarFlushCurrentLine(key);
     } else {
-      if (!cwBarCurrentLine || now - cwBarCurrentLine.lastMs > CW_BAR_LINE_GAP_MS) {
+      let line = cwBarCurrentLines.get(key);
-        cwBarFlushCurrentLine();
+      if (!line || now - line.lastMs > CW_BAR_LINE_GAP_MS) {
+        cwBarFlushCurrentLine(key);
         const ts = new Date(now).toLocaleTimeString([], { hour: "2-digit", minute: "2-digit", second: "2-digit" });
-        cwBarCurrentLine = { tsMs: now, ts, text: "", wpm: null, tone_hz: null, lastMs: now };
+        line = { rigId, tsMs: now, ts, text: "", wpm: null, tone_hz: null, lastMs: now };
+        cwBarCurrentLines.set(key, line);
       }
-      cwBarCurrentLine.text += evt.text;
+      line.text += evt.text;
-      cwBarCurrentLine.lastMs = now;
+      line.lastMs = now;
-      if (Number.isFinite(Number(evt.wpm))) cwBarCurrentLine.wpm = clampCwWpm(evt.wpm);
+      if (Number.isFinite(Number(evt.wpm))) line.wpm = clampCwWpm(evt.wpm);
-      if (Number.isFinite(Number(evt.tone_hz))) cwBarCurrentLine.tone_hz = Math.round(Number(evt.tone_hz));
+      if (Number.isFinite(Number(evt.tone_hz))) line.tone_hz = Math.round(Number(evt.tone_hz));
     }
     updateCwBar();
   }
-  if (cwSignalIndicator) {
+  if (cwSignalIndicator && forSelectedRig) {
     cwSignalIndicator.className = evt.signal_on ? "cw-signal-on" : "cw-signal-off";
   }
-  if (!cwAutoInput || cwAutoInput.checked) {
+  if (forSelectedRig && (!cwAutoInput || cwAutoInput.checked)) {
     if (cwWpmInput && Number.isFinite(Number(evt.wpm))) {
       cwWpmInput.value = String(clampCwWpm(evt.wpm));
     }
@@ -491,6 +511,13 @@ cwWindow.trxPluginRuntime.registerDecoder({
   onMessage: onServerCw,
   restore: restoreCwHistory,
   reset: resetCwHistoryView,
+  // The copied text of a rig that is no longer on screen cannot be unpicked
+  // from the pane, so the switch starts the new rig's stream from empty.
+  rerender: () => {
+    if (cwOutputEl) cwOutputEl.innerHTML = "";
+    cwLastAppendTime = 0;
+    updateCwBar();
+  },
 });
 
 cwWindow.refreshCwTonePicker = function refreshCwTonePicker() {

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/ftx-family.ts

@@ -4,6 +4,7 @@
 
 import { hostCore } from "./host.js";
 
+import { forActiveRig, isActiveRigDecode } from "./active-rig.js";
 import type { PluginRuntimeWindow } from "./runtime-contract.js";
 
 export type FtxDecoderId = "ft2" | "ft4" | "ft8";
@@ -15,6 +16,7 @@ export interface FtxMessage {
   snr_db?: number | undefined;
   dt_s?: number | undefined;
   freq_hz?: number | undefined;
+  rig_id?: string | null | undefined;
   receiver?: unknown;
   [key: string]: unknown;
 }
@@ -227,9 +229,12 @@ export function initializeFtxDecoder(config: FtxConfig): void {
   const render = (): void => {
     prune();
     if (!messagesElement) return;
+    // The history holds every rig's decodes, for the map; the panel is about
+    // the rig the operator is working.
+    const rigMessages = forActiveRig(history);
     const fragment = document.createDocumentFragment();
     let count = 0;
-    for (const message of history) {
+    for (const message of rigMessages) {
       if (count >= 200) break;
       if (filterText && !(message.message ?? "").toUpperCase().includes(filterText)) continue;
       fragment.appendChild(renderRow(message));
@@ -237,20 +242,32 @@ export function initializeFtxDecoder(config: FtxConfig): void {
     }
     messagesElement.replaceChildren(fragment);
   };
-  const normalize = (message: FtxMessage): FtxMessage => {
+  /** Hands a decode's grid squares to the map, if the map module is loaded yet.
+   *  Split out of normalize so a decode can be replayed onto a map that
+   *  arrived later: the module is lazy, and everything decoded before it
+   *  loaded had nowhere to go. */
+  const plotLocator = (message: FtxMessage): void => {
     const raw = message.message ?? "";
     const locatorDetails = bridge.ft8ExtractLocatorDetails?.(raw) ?? extractFtxLocatorDetails(raw);
     const grids = locatorDetails.length > 0
       ? locatorDetails.map(({ grid }) => grid)
       : bridge.ft8ExtractAllGrids?.(raw) ?? extractFtxGrids(raw);
+    if (grids.length === 0) return;
     const station = bridge.ft8ExtractLikelyCallsign?.(raw) ?? extractFtxCallsign(raw);
+    // Already an RF frequency on a replay, an audio offset on arrival; the
+    // conversion only fires below 100 kHz, so it is right either way.
     const frequency = displayFrequency(message.freq_hz);
-    if (grids.length > 0) {
+    bridge.mapAddLocator?.(raw, grids, id, station, {
-      bridge.mapAddLocator?.(raw, grids, id, station, {
+      ...message, freq_hz: frequency ?? message.freq_hz, locator_details: locatorDetails,
-        ...message, freq_hz: frequency ?? message.freq_hz, locator_details: locatorDetails,
+    });
-      });
+  };
-    }
+  const normalize = (message: FtxMessage): FtxMessage => {
+    const frequency = displayFrequency(message.freq_hz);
+    plotLocator(message);
     return {
+      // The rig that heard it, kept so the mini view can tell a decode of the
+      // rig on screen from one a background rig made on another band.
+      rig_id: message.rig_id ?? null,
       receiver: bridge.getDecodeRigMeta?.() ?? null,
       ts_ms: message.ts_ms,
       snr_db: message.snr_db,
@@ -262,7 +279,10 @@ export function initializeFtxDecoder(config: FtxConfig): void {
   };
   const receiveBatch = (messages: FtxMessage[]): void => {
     if (messages.length === 0) return;
-    if (status) status.textContent = "Receiving";
+    // "Receiving" is the panel's own status, and the panel is the rig's.
+    if (status && messages.some((message) => isActiveRigDecode(message.rig_id))) {
+      status.textContent = "Receiving";
+    }
     history = messages.map(normalize).reverse().concat(history);
     prune();
     bridge.setFt8FamilyBarDecoder?.(id);
@@ -277,7 +297,8 @@ export function initializeFtxDecoder(config: FtxConfig): void {
   };
   const barFrames = (): BarFrames => {
     const recent = history
-      .filter((message) => (finiteNumber(message._tsMs ?? message.ts_ms) ?? 0) >= Date.now() - 900_000)
+      .filter((message) => (finiteNumber(message._tsMs ?? message.ts_ms) ?? 0) >= Date.now() - 900_000
+        && isActiveRigDecode(message.rig_id))
       .slice(0, 8);
     let html = "";
     for (const message of recent) {
@@ -299,6 +320,9 @@ export function initializeFtxDecoder(config: FtxConfig): void {
     restore: receiveBatch,
     prune: () => { prune(); render(); },
     reset,
+    rerender: () => { bridge.updateFt8Bar?.(); render(); },
+    // Oldest first, so the map builds the grids up in the order they were heard.
+    syncMap: () => { for (const message of [...history].reverse()) plotLocator(message); },
   });
   bridge.registerFt8FamilyBarRenderer?.(id, barFrames);
 

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/hf-aprs.ts

@@ -4,6 +4,7 @@
 
 import { hostCore, hostState } from "./host.js";
 
+import { forActiveRig, isActiveRigDecode } from "./active-rig.js";
 import {
   aprsAgeText,
   aprsPacketCategory,
@@ -19,6 +20,12 @@ interface HfAprsBridge {
   getDecodeHistoryRetentionMs?: () => number;
   trxScheduleUiFrameJob?: (key: string, job: () => void) => void;
   navigateToAprsMap?: (lat: number, lon: number) => void;
+  aprsMapAddStation?: (
+    call: string, lat: number, lon: number, info: string,
+    symbolTable: string | null | undefined, symbolCode: string | null | undefined,
+    packet: AprsPacket, source: "aprs" | "hf_aprs",
+  ) => void;
+  clearMapMarkersByType?: (type: string) => void;
   getDecodeRigMeta?: () => unknown;
   takeSchedulerControlForDecoderDisable?: (button: HTMLElement) => Promise<unknown>;
   trxUi: { confirm(options: { title: string; message: string; confirmLabel: string }): Promise<boolean> };
@@ -90,23 +97,31 @@ function hfAprsFilterMatch(pkt: AprsPacket): boolean {
   return haystack.includes(hfAprsFilterText);
 }
 
+/** What the selected rig heard.  The history holds every rig's traffic, for
+ *  the map; the panel is about the rig the operator is working. */
+function hfAprsRigPackets(): AprsPacket[] {
+  return forActiveRig(hfAprsPacketHistory);
+}
+
 function hfAprsVisiblePackets(): AprsPacket[] {
-  const packets = hfAprsCollapseDup ? collapseHfAprsDuplicates(hfAprsPacketHistory) : hfAprsPacketHistory;
+  const rigPackets = hfAprsRigPackets();
+  const packets = hfAprsCollapseDup ? collapseHfAprsDuplicates(rigPackets) : rigPackets;
   return packets.filter(hfAprsFilterMatch);
 }
 
 const collapseHfAprsDuplicates = collapseAprsDuplicates;
 
 function updateHfAprsSummary() {
+  const rigPackets = hfAprsRigPackets();
   const visible = hfAprsVisiblePackets();
   if (hfAprsTotalCountEl) {
-    hfAprsTotalCountEl.textContent = `${hfAprsPacketHistory.length} total`;
+    hfAprsTotalCountEl.textContent = `${rigPackets.length} total`;
   }
   if (hfAprsVisibleCountEl) {
     hfAprsVisibleCountEl.textContent = `${visible.length} shown`;
   }
   if (hfAprsLatestSeenEl) {
-    const latest = hfAprsPacketHistory[0];
+    const latest = rigPackets[0];
     if (!latest) {
       hfAprsLatestSeenEl.textContent = "No packets yet";
     } else {
@@ -168,6 +183,7 @@ function resetHfAprsHistoryView(): void {
   if (hfAprsPacketsEl) hfAprsPacketsEl.innerHTML = "";
   hfAprsPacketHistory = [];
   renderHfAprsHistory();
+  hfAprsWindow.clearMapMarkersByType?.("hf_aprs");
 }
 
 function pruneHfAprsHistoryView(): void {
@@ -175,6 +191,17 @@ function pruneHfAprsHistoryView(): void {
   renderHfAprsHistory();
 }
 
+/** Hands a positioned packet to the map, if the map module is loaded yet.
+ *  HF traffic goes on as its own source: it is a different band and a
+ *  different path, and the map filter offers it separately. */
+function plotHfAprsPacket(pkt: AprsPacket): void {
+  if (pkt.lat == null || pkt.lon == null || !hfAprsWindow.aprsMapAddStation) return;
+  hfAprsWindow.aprsMapAddStation(
+    pkt.srcCall ?? "", pkt.lat, pkt.lon, pkt.info ?? "",
+    pkt.symbolTable, pkt.symbolCode, pkt, "hf_aprs",
+  );
+}
+
 function addHfAprsPacket(pkt: AprsPacket): void {
   const tsMs = Number.isFinite(pkt.ts_ms) ? Number(pkt.ts_ms) : Date.now();
   pkt._tsMs = tsMs;
@@ -183,6 +210,8 @@ function addHfAprsPacket(pkt: AprsPacket): void {
   hfAprsPacketHistory.unshift(pkt);
   pruneHfAprsPacketHistory();
 
+  plotHfAprsPacket(pkt);
+
   scheduleHfAprsHistoryRender();
 }
 
@@ -192,13 +221,15 @@ function normalizeServerHfAprsPacket(pkt: AprsPacket): AprsPacket {
 
 function onServerHfAprsBatch(packets: AprsPacket[]): void {
   if (!Array.isArray(packets) || packets.length === 0) return;
-  if (hfAprsStatus) hfAprsStatus.textContent = "Receiving";
   const normalized: AprsPacket[] = [];
   for (const pkt of packets) {
     const next = normalizeServerHfAprsPacket(pkt);
+    // "Receiving" is the panel's own status, and the panel is the rig's.
+    if (hfAprsStatus && isActiveRigDecode(next.rig_id)) hfAprsStatus.textContent = "Receiving";
     const tsMs = Number.isFinite(next.ts_ms) ? Number(next.ts_ms) : Date.now();
     next._tsMs = tsMs;
     next._ts = new Date(tsMs).toLocaleTimeString([], { hour: "2-digit", minute: "2-digit", second: "2-digit" });
+    plotHfAprsPacket(next);
     normalized.push(next);
   }
   normalized.reverse();
@@ -266,8 +297,9 @@ if (hfAprsFilterInput) {
 
 // --- Server-side HF APRS decode handler ---
 function onServerHfAprs(pkt: AprsPacket): void {
-  if (hfAprsStatus) hfAprsStatus.textContent = "Receiving";
+  const packet = normalizeServerHfAprsPacket(pkt);
-  addHfAprsPacket(normalizeServerHfAprsPacket(pkt));
+  if (hfAprsStatus && isActiveRigDecode(packet.rig_id)) hfAprsStatus.textContent = "Receiving";
+  addHfAprsPacket(packet);
 }
 
 renderHfAprsHistory();
@@ -278,4 +310,7 @@ renderHfAprsHistory();
   restore: onServerHfAprsBatch,
   reset: resetHfAprsHistoryView,
   prune: pruneHfAprsHistoryView,
+  rerender: renderHfAprsHistory,
+  // Oldest first, so station tracks are rebuilt in the order they happened.
+  syncMap: () => { for (const entry of [...hfAprsPacketHistory].reverse()) plotHfAprsPacket(entry); },
 });

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/runtime-contract.ts

@@ -9,6 +9,10 @@ export interface DecoderPlugin<TMessage = unknown> {
   restore?(messages: TMessage[]): void;
   reset?(): void;
   prune?(): void;
+  /** Repaint the plugin's panel from what it already holds. Called when the
+   *  selected rig changes: the panels show one rig's traffic, and the decodes
+   *  behind them arrived long before the switch. */
+  rerender?(): void;
   /** Replay everything the plugin is holding onto the map. Called when the map
    *  module attaches, which can happen long after the decodes arrived. */
   syncMap?(): void;
@@ -22,6 +26,7 @@ export interface TrxPluginRuntime {
   reset(id: string): boolean;
   resetAll(): void;
   prune(id: string): boolean;
+  rerenderAll(): void;
   syncMapAll(): void;
   clearQueued(): void;
   hasDecoder(id: string): boolean;

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/sat.ts

@@ -4,13 +4,12 @@
 
 import { hostCore } from "./host.js";
 
-import type { LrptProgress, SatelliteImage, SatelliteLiveUpdate, SatellitePass, SatellitePassResponse } from "./satellite-types";
+import type { LrptProgress, SatelliteImage, SatelliteLiveUpdate } from "./satellite-types";
 import type { PluginRuntimeWindow } from "./runtime-contract.js";
 
-type SatelliteView = "live" | "history" | "predictions";
+type SatelliteView = "live" | "history";
 interface SatelliteBridge {
   trxScheduleUiFrameJob?: (key: string, job: () => void) => void;
-  clearSatPredictionDom?: () => void;
   updateSatLiveState?: (update: SatelliteLiveUpdate) => void;
   addSatMapOverlay?: (image: SatelliteImage) => void;
   clearSatMapOverlays?: () => void;
@@ -25,14 +24,14 @@ const satWindow = window as unknown as SatelliteBridge & PluginRuntimeWindow;
 // --- SAT Plugin ---
 // Live view: decoder state, latest image card
 // History view: filterable table of all decoded images
-// Predictions view: next 24 h passes for ham satellites
+//
+// Pass predictions live on their own page; see satellite-predictions.ts.
 
 // ── DOM references (cached once) ───────────────────────────────────
 const satDom = {
   status:           document.getElementById("sat-status"),
   liveView:         document.getElementById("sat-live-view"),
   historyView:      document.getElementById("sat-history-view"),
-  predictionsView:  document.getElementById("sat-predictions-view"),
   liveLatest:       document.getElementById("sat-live-latest"),
   historyList:      document.getElementById("sat-history-list"),
   historyCount:     document.getElementById("sat-history-count"),
@@ -42,30 +41,13 @@ const satDom = {
   lrptState:        document.getElementById("sat-lrpt-state"),
   viewLiveBtn:      document.getElementById("sat-view-live"),
   viewHistoryBtn:   document.getElementById("sat-view-history"),
-  viewPredBtn:      document.getElementById("sat-view-predictions"),
-  predFilter:       document.getElementById("sat-pred-filter") as HTMLInputElement | null,
-  predMinEl:        document.getElementById("sat-pred-min-el") as HTMLSelectElement | null,
-  predCategory:     document.getElementById("sat-pred-category") as HTMLSelectElement | null,
-  predCurrentList:  document.getElementById("sat-pred-current-list"),
-  predUpcomingList: document.getElementById("sat-pred-list"),
-  predCurrentSec:   document.getElementById("sat-pred-current-section"),
-  predUpcomingSec:  document.getElementById("sat-pred-upcoming-section"),
-  predStatus:       document.getElementById("sat-pred-status"),
 };
 
 // ── State ───────────────────────────────────────────────────────────
 let satImageHistory: SatelliteImage[] = [];
 const SAT_MAX_IMAGES = 100;
-const SAT_PRED_PAGE_SIZE = 50;
-let satPredShowAll = false;
 let satFilterText = "";
 let satActiveView: SatelliteView = "live";
-let satPredData: SatellitePass[] = [];
-let satPredFilterText = "";
-let satPredMinEl = 0;
-let satPredCategory = "all";
-let satPredSatCount = 0;
-let satPredCountdownTimer: ReturnType<typeof setInterval> | null = null;
 
 // ── UI scheduler helper ─────────────────────────────────────────────
 function scheduleSatUi(key: string, job: () => void): void {
@@ -78,33 +60,16 @@ function scheduleSatUi(key: string, job: () => void): void {
 
 // ── View switching ──────────────────────────────────────────────────
 function switchSatView(view: SatelliteView): void {
-  const leavingPredictions = satActiveView === "predictions" && view !== "predictions";
   satActiveView = view;
-  if (satDom.liveView)        satDom.liveView.style.display = view === "live" ? "" : "none";
+  if (satDom.liveView)       satDom.liveView.style.display = view === "live" ? "" : "none";
-  if (satDom.historyView)     satDom.historyView.style.display = view === "history" ? "" : "none";
+  if (satDom.historyView)    satDom.historyView.style.display = view === "history" ? "" : "none";
-  if (satDom.predictionsView) satDom.predictionsView.style.display = view === "predictions" ? "" : "none";
+  if (satDom.viewLiveBtn)    satDom.viewLiveBtn.classList.toggle("sat-view-active", view === "live");
-  if (satDom.viewLiveBtn)     satDom.viewLiveBtn.classList.toggle("sat-view-active", view === "live");
+  if (satDom.viewHistoryBtn) satDom.viewHistoryBtn.classList.toggle("sat-view-active", view === "history");
-  if (satDom.viewHistoryBtn)  satDom.viewHistoryBtn.classList.toggle("sat-view-active", view === "history");
+  if (view === "history") renderSatHistoryTable();
-  if (satDom.viewPredBtn)     satDom.viewPredBtn.classList.toggle("sat-view-active", view === "predictions");
-  if (leavingPredictions) clearPredictionDom();
-  if (view === "history") {
-    renderSatHistoryTable();
-  } else if (view === "predictions") {
-    satPredShowAll = false;
-    void loadSatPredictions();
-  }
 }
 
-function clearPredictionDom() {
-  stopCountdownTimer();
-  if (satDom.predCurrentList)  satDom.predCurrentList.innerHTML = "";
-  if (satDom.predUpcomingList) satDom.predUpcomingList.innerHTML = "";
-}
-satWindow.clearSatPredictionDom = clearPredictionDom;
-
 satDom.viewLiveBtn?.addEventListener("click", () => { switchSatView("live"); });
 satDom.viewHistoryBtn?.addEventListener("click", () => { switchSatView("history"); });
-satDom.viewPredBtn?.addEventListener("click", () => { switchSatView("predictions"); });
 
 // ── Live view: decoder state ────────────────────────────────────────
 let lastSatLrptOn: boolean | null = null;
@@ -335,234 +300,6 @@ document
     }
   })(); });
 
-// ── Predictions: helpers ────────────────────────────────────────────
-function azToCardinal(deg: number): string {
-  const dirs = ["N", "NE", "E", "SE", "S", "SW", "W", "NW"];
-  return dirs[Math.round(deg / 45) % 8] ?? "N";
-}
-
-function formatPredTime(ms: number): string {
-  const d = new Date(ms);
-  const now = new Date();
-  const dayNames = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
-  const day = d.getUTCDay() !== now.getUTCDay() ? `${dayNames[d.getUTCDay()] ?? ""} ` : "";
-  const hh = String(d.getUTCHours()).padStart(2, "0");
-  const mm = String(d.getUTCMinutes()).padStart(2, "0");
-  return `${day}${hh}:${mm}`;
-}
-
-function formatPredDuration(s: number): string {
-  if (s >= 60) return `${Math.round(s / 60)} min`;
-  return `${s}s`;
-}
-
-function formatCountdown(ms: number): string {
-  const totalSec = Math.max(0, Math.floor(ms / 1000));
-  const m = Math.floor(totalSec / 60);
-  const s = totalSec % 60;
-  return `${m}:${String(s).padStart(2, "0")}`;
-}
-
-function elevationClass(deg: number): string {
-  if (deg >= 45) return "sat-pred-el-high";
-  if (deg >= 10) return "sat-pred-el-mid";
-  return "sat-pred-el-low";
-}
-
-// ── Predictions: countdown timer management ─────────────────────────
-function stopCountdownTimer() {
-  if (satPredCountdownTimer) {
-    clearInterval(satPredCountdownTimer);
-    satPredCountdownTimer = null;
-  }
-}
-
-function startCountdownTimer(container: HTMLElement | null): void {
-  const countdownEls = container?.querySelectorAll<HTMLElement>(".sat-pred-col-countdown") ?? [];
-  if (countdownEls.length === 0) return;
-
-  satPredCountdownTimer = setInterval(() => {
-    if (satActiveView !== "predictions") {
-      stopCountdownTimer();
-      return;
-    }
-    const n = Date.now();
-    let anyActive = false;
-    for (const el of countdownEls) {
-      const los = Number.parseInt(el.dataset.los ?? "0", 10);
-      const rem = los - n;
-      if (rem > 0) {
-        el.textContent = formatCountdown(rem);
-        anyActive = true;
-      } else {
-        el.textContent = "0:00";
-      }
-    }
-    if (!anyActive) {
-      stopCountdownTimer();
-      renderSatPredictions(getFilteredPredictions());
-    }
-  }, 1000);
-}
-
-// ── Predictions: row builders ───────────────────────────────────────
-function buildCurrentPassRow(pass: SatellitePass, now: number): HTMLElement {
-  const row = document.createElement("div");
-  row.className = "sat-pred-row-current";
-  const dir = `${azToCardinal(pass.azimuth_aos_deg)} \u2192 ${azToCardinal(pass.azimuth_los_deg)}`;
-  const remaining = Math.max(0, pass.los_ms - now);
-  row.innerHTML = [
-    `<span class="sat-pred-col-sat">${pass.satellite}</span>`,
-    `<span class="sat-pred-col-el ${elevationClass(pass.max_elevation_deg)}">${pass.max_elevation_deg.toFixed(1)}\u00B0</span>`,
-    `<span class="sat-pred-col-time">${formatPredTime(pass.aos_ms)}</span>`,
-    `<span class="sat-pred-col-time">${formatPredTime(pass.los_ms)}</span>`,
-    `<span class="sat-pred-col-countdown" data-los="${pass.los_ms}">${formatCountdown(remaining)}</span>`,
-    `<span class="sat-pred-col-dir">${dir}</span>`,
-  ].join("");
-  return row;
-}
-
-function buildUpcomingPassRow(pass: SatellitePass): HTMLElement {
-  const row = document.createElement("div");
-  row.className = "sat-pred-row";
-  const dir = `${azToCardinal(pass.azimuth_aos_deg)} \u2192 ${azToCardinal(pass.azimuth_los_deg)}`;
-  row.innerHTML = [
-    `<span class="sat-pred-col-time">${formatPredTime(pass.aos_ms)}</span>`,
-    `<span class="sat-pred-col-sat">${pass.satellite}</span>`,
-    `<span class="sat-pred-col-el ${elevationClass(pass.max_elevation_deg)}">${pass.max_elevation_deg.toFixed(1)}\u00B0</span>`,
-    `<span class="sat-pred-col-dur">${formatPredDuration(pass.duration_s)}</span>`,
-    `<span class="sat-pred-col-dir">${dir}</span>`,
-  ].join("");
-  return row;
-}
-
-// ── Predictions: filter state ───────────────────────────────────────
-function getFilteredPredictions(): SatellitePass[] {
-  let items = satPredData;
-  if (satPredCategory !== "all") items = items.filter((p) => p.category === satPredCategory);
-  if (satPredMinEl > 0) items = items.filter((p) => p.max_elevation_deg >= satPredMinEl);
-  if (satPredFilterText) items = items.filter((p) => p.satellite.toUpperCase().includes(satPredFilterText));
-  return items;
-}
-
-function applyPredFilters() {
-  renderSatPredictions(getFilteredPredictions());
-}
-
-const satPredictionFilter = satDom.predFilter;
-satPredictionFilter?.addEventListener("input", () => {
-  satPredFilterText = satPredictionFilter.value.trim().toUpperCase();
-  applyPredFilters();
-});
-
-const satPredictionMinElevation = satDom.predMinEl;
-satPredictionMinElevation?.addEventListener("change", () => {
-  satPredMinEl = Number.parseInt(satPredictionMinElevation.value, 10) || 0;
-  applyPredFilters();
-});
-
-const satPredictionCategory = satDom.predCategory;
-satPredictionCategory?.addEventListener("change", () => {
-  satPredCategory = satPredictionCategory.value;
-  applyPredFilters();
-});
-
-// ── Predictions: main render ────────────────────────────────────────
-function renderSatPredictions(passes: SatellitePass[], error?: string): void {
-  stopCountdownTimer();
-
-  if (error) {
-    if (satDom.predCurrentList)  satDom.predCurrentList.innerHTML = "";
-    if (satDom.predUpcomingList) satDom.predUpcomingList.innerHTML = "";
-    if (satDom.predCurrentSec)   satDom.predCurrentSec.style.display = "none";
-    if (satDom.predUpcomingSec)  satDom.predUpcomingSec.style.display = "none";
-    if (satDom.predStatus)       satDom.predStatus.textContent = error;
-    return;
-  }
-
-  if (!Array.isArray(passes) || passes.length === 0) {
-    if (satDom.predCurrentList)  satDom.predCurrentList.innerHTML = "";
-    if (satDom.predUpcomingList) satDom.predUpcomingList.innerHTML = "";
-    if (satDom.predCurrentSec)   satDom.predCurrentSec.style.display = "none";
-    if (satDom.predUpcomingSec)  satDom.predUpcomingSec.style.display = "none";
-    if (satDom.predStatus)       satDom.predStatus.textContent = "No passes found in the next 24 hours.";
-    return;
-  }
-
-  const now = Date.now();
-  const current = passes.filter((p) => p.aos_ms <= now && p.los_ms > now);
-  const upcoming = passes.filter((p) => p.aos_ms > now);
-
-  // ── Current passes ──
-  if (satDom.predCurrentSec) satDom.predCurrentSec.style.display = current.length > 0 ? "" : "none";
-  if (satDom.predCurrentList) {
-    if (current.length === 0) {
-      satDom.predCurrentList.innerHTML = "";
-    } else {
-      const frag = document.createDocumentFragment();
-      for (const pass of current) frag.appendChild(buildCurrentPassRow(pass, now));
-      satDom.predCurrentList.replaceChildren(frag);
-    }
-  }
-
-  // ── Upcoming passes ──
-  const upcomingLimit = satPredShowAll ? upcoming.length : SAT_PRED_PAGE_SIZE;
-  const visibleUpcoming = upcoming.slice(0, upcomingLimit);
-  const hiddenCount = upcoming.length - visibleUpcoming.length;
-  if (satDom.predUpcomingSec) satDom.predUpcomingSec.style.display = upcoming.length > 0 ? "" : "none";
-  if (satDom.predUpcomingList) {
-    const frag = document.createDocumentFragment();
-    for (const pass of visibleUpcoming) frag.appendChild(buildUpcomingPassRow(pass));
-    if (hiddenCount > 0) {
-      const moreRow = document.createElement("div");
-      moreRow.className = "sat-pred-row";
-      moreRow.style.cursor = "pointer";
-      moreRow.style.textAlign = "center";
-      moreRow.innerHTML = `<span style="grid-column:1/-1;color:var(--accent);font-size:0.82rem;">Show ${hiddenCount} more passes\u2026</span>`;
-      moreRow.addEventListener("click", () => {
-        satPredShowAll = true;
-        renderSatPredictions(getFilteredPredictions());
-      });
-      frag.appendChild(moreRow);
-    }
-    satDom.predUpcomingList.replaceChildren(frag);
-  }
-
-  // ── Status ──
-  if (satDom.predStatus) {
-    let text = `${current.length} active \u00B7 ${upcoming.length} upcoming \u00B7 times in UTC`;
-    if (satPredSatCount > 0) text += ` \u00B7 ${satPredSatCount} satellites tracked`;
-    satDom.predStatus.textContent = text;
-  }
-
-  // ── Countdown timer ──
-  if (current.length > 0 && satActiveView === "predictions") {
-    startCountdownTimer(satDom.predCurrentList);
-  }
-}
-
-// ── Predictions: data loading ───────────────────────────────────────
-async function loadSatPredictions(): Promise<void> {
-  if (satDom.predStatus)       satDom.predStatus.textContent = "Loading predictions\u2026";
-  if (satDom.predCurrentList)  satDom.predCurrentList.innerHTML = "";
-  if (satDom.predUpcomingList) satDom.predUpcomingList.innerHTML = "";
-  try {
-    const resp = await fetch("/sat_passes");
-    if (!resp.ok) throw new Error(`HTTP ${resp.status}`);
-    const data = await resp.json() as SatellitePassResponse;
-    satPredSatCount = data.satellite_count || 0;
-    if (data.error) {
-      satPredData = [];
-      renderSatPredictions([], data.error);
-    } else {
-      satPredData = data.passes || [];
-      renderSatPredictions(getFilteredPredictions());
-    }
-  } catch (error: unknown) {
-    renderSatPredictions([], `Failed to load predictions: ${error instanceof Error ? error.message : String(error)}`);
-  }
-}
-
 // ── Navigate to map centered on satellite image bounds ──────────────
 satWindow.satShowOnMap = function (south: number, west: number, north: number, east: number) {
   if (typeof satWindow.enableMapSourceFilter === "function") {

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/satellite-predictions.ts

@@ -0,0 +1,290 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+import type { SatellitePass, SatellitePassResponse } from "./satellite-types";
+
+// --- Satellite pass predictions ---
+//
+// Its own page rather than a third view inside the weather-satellite decoder:
+// when a bird comes over is a planning question, and it was buried under
+// Digital modes beside decoders it has nothing to do with.
+
+interface PredictionsBridge {
+  clearSatPredictionDom?: () => void;
+  refreshSatPredictions?: () => void;
+}
+const predWindow = window as unknown as PredictionsBridge;
+
+// ── DOM references (cached once) ───────────────────────────────────
+const dom = {
+  page:            document.getElementById("tab-satellites"),
+  filter:          document.getElementById("sat-pred-filter") as HTMLInputElement | null,
+  minElevation:    document.getElementById("sat-pred-min-el") as HTMLSelectElement | null,
+  category:        document.getElementById("sat-pred-category") as HTMLSelectElement | null,
+  currentList:     document.getElementById("sat-pred-current-list"),
+  upcomingList:    document.getElementById("sat-pred-list"),
+  currentSection:  document.getElementById("sat-pred-current-section"),
+  upcomingSection: document.getElementById("sat-pred-upcoming-section"),
+  status:          document.getElementById("sat-pred-status"),
+};
+
+// ── State ───────────────────────────────────────────────────────────
+const PAGE_SIZE = 50;
+let predShowAll = false;
+let predData: SatellitePass[] = [];
+let predFilterText = "";
+let predMinEl = 0;
+let predCategory = "all";
+let predSatCount = 0;
+let predCountdownTimer: ReturnType<typeof setInterval> | null = null;
+
+/** The countdowns tick once a second, so they stop when nobody is looking. */
+function isPageVisible(): boolean {
+  return !!dom.page && dom.page.style.display !== "none";
+}
+
+// ── Predictions: helpers ────────────────────────────────────────────
+function azToCardinal(deg: number): string {
+  const dirs = ["N", "NE", "E", "SE", "S", "SW", "W", "NW"];
+  return dirs[Math.round(deg / 45) % 8] ?? "N";
+}
+
+function formatPredTime(ms: number): string {
+  const d = new Date(ms);
+  const now = new Date();
+  const dayNames = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
+  const day = d.getUTCDay() !== now.getUTCDay() ? `${dayNames[d.getUTCDay()] ?? ""} ` : "";
+  const hh = String(d.getUTCHours()).padStart(2, "0");
+  const mm = String(d.getUTCMinutes()).padStart(2, "0");
+  return `${day}${hh}:${mm}`;
+}
+
+function formatPredDuration(s: number): string {
+  if (s >= 60) return `${Math.round(s / 60)} min`;
+  return `${s}s`;
+}
+
+function formatCountdown(ms: number): string {
+  const totalSec = Math.max(0, Math.floor(ms / 1000));
+  const m = Math.floor(totalSec / 60);
+  const s = totalSec % 60;
+  return `${m}:${String(s).padStart(2, "0")}`;
+}
+
+function elevationClass(deg: number): string {
+  if (deg >= 45) return "sat-pred-el-high";
+  if (deg >= 10) return "sat-pred-el-mid";
+  return "sat-pred-el-low";
+}
+
+// ── Predictions: countdown timer management ─────────────────────────
+function stopCountdownTimer() {
+  if (predCountdownTimer) {
+    clearInterval(predCountdownTimer);
+    predCountdownTimer = null;
+  }
+}
+
+function startCountdownTimer(container: HTMLElement | null): void {
+  const countdownEls = container?.querySelectorAll<HTMLElement>(".sat-pred-col-countdown") ?? [];
+  if (countdownEls.length === 0) return;
+
+  predCountdownTimer = setInterval(() => {
+    if (!isPageVisible()) {
+      stopCountdownTimer();
+      return;
+    }
+    const n = Date.now();
+    let anyActive = false;
+    for (const el of countdownEls) {
+      const los = Number.parseInt(el.dataset.los ?? "0", 10);
+      const rem = los - n;
+      if (rem > 0) {
+        el.textContent = formatCountdown(rem);
+        anyActive = true;
+      } else {
+        el.textContent = "0:00";
+      }
+    }
+    if (!anyActive) {
+      stopCountdownTimer();
+      render(filtered());
+    }
+  }, 1000);
+}
+
+// ── Predictions: row builders ───────────────────────────────────────
+function buildCurrentPassRow(pass: SatellitePass, now: number): HTMLElement {
+  const row = document.createElement("div");
+  row.className = "sat-pred-row-current";
+  const dir = `${azToCardinal(pass.azimuth_aos_deg)} \u2192 ${azToCardinal(pass.azimuth_los_deg)}`;
+  const remaining = Math.max(0, pass.los_ms - now);
+  row.innerHTML = [
+    `<span class="sat-pred-col-sat">${pass.satellite}</span>`,
+    `<span class="sat-pred-col-el ${elevationClass(pass.max_elevation_deg)}">${pass.max_elevation_deg.toFixed(1)}\u00B0</span>`,
+    `<span class="sat-pred-col-time">${formatPredTime(pass.aos_ms)}</span>`,
+    `<span class="sat-pred-col-time">${formatPredTime(pass.los_ms)}</span>`,
+    `<span class="sat-pred-col-countdown" data-los="${pass.los_ms}">${formatCountdown(remaining)}</span>`,
+    `<span class="sat-pred-col-dir">${dir}</span>`,
+  ].join("");
+  return row;
+}
+
+function buildUpcomingPassRow(pass: SatellitePass): HTMLElement {
+  const row = document.createElement("div");
+  row.className = "sat-pred-row";
+  const dir = `${azToCardinal(pass.azimuth_aos_deg)} \u2192 ${azToCardinal(pass.azimuth_los_deg)}`;
+  row.innerHTML = [
+    `<span class="sat-pred-col-time">${formatPredTime(pass.aos_ms)}</span>`,
+    `<span class="sat-pred-col-sat">${pass.satellite}</span>`,
+    `<span class="sat-pred-col-el ${elevationClass(pass.max_elevation_deg)}">${pass.max_elevation_deg.toFixed(1)}\u00B0</span>`,
+    `<span class="sat-pred-col-dur">${formatPredDuration(pass.duration_s)}</span>`,
+    `<span class="sat-pred-col-dir">${dir}</span>`,
+  ].join("");
+  return row;
+}
+
+// ── Predictions: filter state ───────────────────────────────────────
+function filtered(): SatellitePass[] {
+  let items = predData;
+  if (predCategory !== "all") items = items.filter((p) => p.category === predCategory);
+  if (predMinEl > 0) items = items.filter((p) => p.max_elevation_deg >= predMinEl);
+  if (predFilterText) items = items.filter((p) => p.satellite.toUpperCase().includes(predFilterText));
+  return items;
+}
+
+function applyFilters() {
+  render(filtered());
+}
+
+const filterInput = dom.filter;
+filterInput?.addEventListener("input", () => {
+  predFilterText = filterInput.value.trim().toUpperCase();
+  applyFilters();
+});
+
+const minElevationSelect = dom.minElevation;
+minElevationSelect?.addEventListener("change", () => {
+  predMinEl = Number.parseInt(minElevationSelect.value, 10) || 0;
+  applyFilters();
+});
+
+const categorySelect = dom.category;
+categorySelect?.addEventListener("change", () => {
+  predCategory = categorySelect.value;
+  applyFilters();
+});
+
+// ── Predictions: main render ────────────────────────────────────────
+function render(passes: SatellitePass[], error?: string): void {
+  stopCountdownTimer();
+
+  if (error) {
+    if (dom.currentList)  dom.currentList.innerHTML = "";
+    if (dom.upcomingList) dom.upcomingList.innerHTML = "";
+    if (dom.currentSection)   dom.currentSection.style.display = "none";
+    if (dom.upcomingSection)  dom.upcomingSection.style.display = "none";
+    if (dom.status)       dom.status.textContent = error;
+    return;
+  }
+
+  if (!Array.isArray(passes) || passes.length === 0) {
+    if (dom.currentList)  dom.currentList.innerHTML = "";
+    if (dom.upcomingList) dom.upcomingList.innerHTML = "";
+    if (dom.currentSection)   dom.currentSection.style.display = "none";
+    if (dom.upcomingSection)  dom.upcomingSection.style.display = "none";
+    if (dom.status)       dom.status.textContent = "No passes found in the next 24 hours.";
+    return;
+  }
+
+  const now = Date.now();
+  const current = passes.filter((p) => p.aos_ms <= now && p.los_ms > now);
+  const upcoming = passes.filter((p) => p.aos_ms > now);
+
+  // ── Current passes ──
+  if (dom.currentSection) dom.currentSection.style.display = current.length > 0 ? "" : "none";
+  if (dom.currentList) {
+    if (current.length === 0) {
+      dom.currentList.innerHTML = "";
+    } else {
+      const frag = document.createDocumentFragment();
+      for (const pass of current) frag.appendChild(buildCurrentPassRow(pass, now));
+      dom.currentList.replaceChildren(frag);
+    }
+  }
+
+  // ── Upcoming passes ──
+  const upcomingLimit = predShowAll ? upcoming.length : PAGE_SIZE;
+  const visibleUpcoming = upcoming.slice(0, upcomingLimit);
+  const hiddenCount = upcoming.length - visibleUpcoming.length;
+  if (dom.upcomingSection) dom.upcomingSection.style.display = upcoming.length > 0 ? "" : "none";
+  if (dom.upcomingList) {
+    const frag = document.createDocumentFragment();
+    for (const pass of visibleUpcoming) frag.appendChild(buildUpcomingPassRow(pass));
+    if (hiddenCount > 0) {
+      const moreRow = document.createElement("div");
+      moreRow.className = "sat-pred-row";
+      moreRow.style.cursor = "pointer";
+      moreRow.style.textAlign = "center";
+      moreRow.innerHTML = `<span style="grid-column:1/-1;color:var(--accent);font-size:0.82rem;">Show ${hiddenCount} more passes\u2026</span>`;
+      moreRow.addEventListener("click", () => {
+        predShowAll = true;
+        render(filtered());
+      });
+      frag.appendChild(moreRow);
+    }
+    dom.upcomingList.replaceChildren(frag);
+  }
+
+  // ── Status ──
+  if (dom.status) {
+    let text = `${current.length} active \u00B7 ${upcoming.length} upcoming \u00B7 times in UTC`;
+    if (predSatCount > 0) text += ` \u00B7 ${predSatCount} satellites tracked`;
+    dom.status.textContent = text;
+  }
+
+  // ── Countdown timer ──
+  if (current.length > 0 && isPageVisible()) {
+    startCountdownTimer(dom.currentList);
+  }
+}
+
+// ── Predictions: data loading ───────────────────────────────────────
+async function load(): Promise<void> {
+  if (dom.status)       dom.status.textContent = "Loading predictions\u2026";
+  if (dom.currentList)  dom.currentList.innerHTML = "";
+  if (dom.upcomingList) dom.upcomingList.innerHTML = "";
+  try {
+    const resp = await fetch("/sat_passes");
+    if (!resp.ok) throw new Error(`HTTP ${resp.status}`);
+    const data = await resp.json() as SatellitePassResponse;
+    predSatCount = data.satellite_count || 0;
+    if (data.error) {
+      predData = [];
+      render([], data.error);
+    } else {
+      predData = data.passes || [];
+      render(filtered());
+    }
+  } catch (error: unknown) {
+    render([], `Failed to load predictions: ${error instanceof Error ? error.message : String(error)}`);
+  }
+}
+
+// ── Page lifecycle ──────────────────────────────────────────────────
+function clearPredictionDom(): void {
+  stopCountdownTimer();
+  if (dom.currentList)  dom.currentList.innerHTML = "";
+  if (dom.upcomingList) dom.upcomingList.innerHTML = "";
+}
+predWindow.clearSatPredictionDom = clearPredictionDom;
+
+/**
+ * Called by the router each time the Satellites page is opened, including the
+ * visit that imports this module — so loading is driven from one place only.
+ */
+predWindow.refreshSatPredictions = function () {
+  predShowAll = false;
+  void load();
+};

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/sstv.ts

@@ -14,11 +14,13 @@
 
 import { hostCore } from "./host.js";
 
+import { forActiveRig, isActiveRigDecode } from "./active-rig.js";
 import type { PluginRuntimeWindow } from "./runtime-contract.js";
 
 export {};
 
 interface SstvImage {
+  rig_id?: string | null;
   ts_ms?: number;
   vis?: number;
   mode?: string;
@@ -32,6 +34,7 @@ interface SstvImage {
 }
 
 interface SstvProgress {
+  rig_id?: string | null;
   state?: string;
   mode?: string;
   width?: number;
@@ -185,6 +188,9 @@ function paintRow(line: number, rgb: Uint8Array): void {
 // ── Server messages ─────────────────────────────────────────────────
 
 function onProgress(msg: SstvProgress): void {
+  // The live canvas draws one picture at a time: a background rig's rows would
+  // paint straight over the one being watched.
+  if (!isActiveRigDecode(msg.rig_id)) return;
   if (msg.state) {
     if (sstvDom.status) sstvDom.status.textContent = msg.state;
     // A state update carries the geometry; a row update carries only the row.
@@ -208,6 +214,9 @@ function onImage(msg: SstvImage): void {
   if (sstvHistory.length > SSTV_MAX_IMAGES) sstvHistory.shift();
   pruneHistory();
 
+  // Kept in the history either way, so switching to that rig finds it there.
+  if (!isActiveRigDecode(image.rig_id)) return;
+
   if (sstvDom.status) {
     sstvDom.status.textContent = image.complete
       ? `Received ${image.mode ?? "picture"}`
@@ -219,9 +228,15 @@ function onImage(msg: SstvImage): void {
 
 // ── Rendering ───────────────────────────────────────────────────────
 
+/** The pictures the selected rig decoded, oldest first, as the history is kept. */
+function sstvRigImages(): SstvImage[] {
+  return forActiveRig(sstvHistory);
+}
+
 function renderLatestCard(): void {
   if (!sstvDom.liveLatest) return;
-  const latest = sstvHistory[sstvHistory.length - 1];
+  const rigImages = sstvRigImages();
+  const latest = rigImages[rigImages.length - 1];
   if (!latest) {
     sstvDom.liveLatest.innerHTML = "";
     return;
@@ -245,10 +260,12 @@ function renderLatestCard(): void {
 }
 
 function filteredHistory(): SstvImage[] {
+  // Every rig's pictures are kept; the panel shows the selected rig's.
+  const rigImages = sstvRigImages();
   const text = filterText.trim().toLowerCase();
   const matching = text
-    ? sstvHistory.filter((image) => (image.mode ?? "").toLowerCase().includes(text))
+    ? rigImages.filter((image) => (image.mode ?? "").toLowerCase().includes(text))
-    : sstvHistory.slice();
+    : rigImages;
   const newestFirst = (sstvDom.sortSelect?.value ?? "newest") === "newest";
   matching.sort((a, b) => (newestFirst ? 1 : -1) * ((b._tsMs ?? 0) - (a._tsMs ?? 0)));
   return matching;
@@ -348,6 +365,7 @@ sstvWindow.trxPluginRuntime.registerDecoder({
   restore: restoreHistory,
   prune: renderHistoryTable,
   reset: resetHistoryView,
+  rerender: () => { renderLatestCard(); renderHistoryTable(); },
 });
 sstvWindow.trxPluginRuntime.registerDecoder({
   id: "sstv_progress",

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/vdes.ts

@@ -6,6 +6,7 @@ import { hostCore } from "./host.js";
 
 export {};
 
+import { forActiveRig, isActiveRigDecode } from "./active-rig.js";
 import type { PluginRuntimeWindow } from "./runtime-contract";
 
 interface VdesMessage {
@@ -116,17 +117,24 @@ function vdesHexPreview(rawBytes: number[] | undefined): string {
     .toUpperCase();
 }
 
+/** What the selected rig heard.  The history holds every rig's traffic, for
+ *  the map; the panel is about the rig the operator is working. */
+function vdesRigMessages(): VdesMessage[] {
+  return forActiveRig(vdesMessageHistory);
+}
+
 function updateVdesSummary() {
   pruneVdesMessageHistory();
   if (vdesChannelSummaryEl) {
     vdesChannelSummaryEl.textContent = currentVdesCenterText();
   }
+  const rigMessages = vdesRigMessages();
   if (vdesFrameCountEl) {
-    const count = vdesMessageHistory.length;
+    const count = rigMessages.length;
     vdesFrameCountEl.textContent = `${count} burst${count === 1 ? "" : "s"}`;
   }
   if (vdesLatestSeenEl) {
-    const latest = vdesMessageHistory[0];
+    const latest = rigMessages[0];
     vdesLatestSeenEl.textContent = latest ? vdesAgeText(latest._tsMs) : "No traffic yet";
   }
 }
@@ -228,7 +236,9 @@ function updateVdesBar() {
   updateVdesSummary();
   const isVdes = ((document.getElementById("mode") as HTMLSelectElement | null)?.value || "").toUpperCase() === "VDES";
   const cutoffMs = Date.now() - VDES_BAR_WINDOW_MS;
-  const messages = vdesMessageHistory.filter((msg) => (msg._tsMs ?? 0) >= cutoffMs).slice(0, 6);
+  const messages = vdesMessageHistory
+    .filter((msg) => (msg._tsMs ?? 0) >= cutoffMs && isActiveRigDecode(msg.rig_id))
+    .slice(0, 6);
   if (!isVdes || messages.length === 0) {
     vdesBarOverlay.style.display = "none";
     vdesBarOverlay.innerHTML = "";
@@ -278,7 +288,7 @@ function renderVdesHistory() {
     return;
   }
   const fragment = document.createDocumentFragment();
-  for (const message of vdesMessageHistory) {
+  for (const message of vdesRigMessages()) {
     fragment.appendChild(renderVdesRow(message));
   }
   vdesMessagesEl.replaceChildren(fragment);
@@ -309,10 +319,11 @@ function normalizeServerVdesMessage(msg: VdesMessage): VdesMessage {
 
 function onServerVdesBatch(messages: VdesMessage[]): void {
   if (!Array.isArray(messages) || messages.length === 0) return;
-  if (vdesStatus) vdesStatus.textContent = "Receiving";
   const normalized: VdesMessage[] = [];
   for (const msg of messages) {
     const next = normalizeServerVdesMessage(msg);
+    // "Receiving" is the panel's own status, and the panel is the rig's.
+    if (vdesStatus && isActiveRigDecode(next.rig_id)) vdesStatus.textContent = "Receiving";
     const tsMs = Number.isFinite(next.ts_ms) ? Number(next.ts_ms) : Date.now();
     next._tsMs = tsMs;
     next._ts = new Date(tsMs).toLocaleTimeString([], {
@@ -354,8 +365,8 @@ function plotVdesMessage(msg: VdesMessage): void {
 }
 
 function onServerVdes(msg: VdesMessage): void {
-  if (vdesStatus) vdesStatus.textContent = "Receiving";
   const next = normalizeServerVdesMessage(msg);
+  if (vdesStatus && isActiveRigDecode(next.rig_id)) vdesStatus.textContent = "Receiving";
   addVdesMessage(next);
   plotVdesMessage(next);
 }
@@ -374,6 +385,7 @@ updateVdesSummary();
   restore: onServerVdesBatch,
   reset: resetVdesHistoryView,
   prune: pruneVdesHistoryView,
+  rerender: () => { updateVdesBar(); renderVdesHistory(); },
   // Oldest first, so tracks are rebuilt in the order they happened.
   syncMap: () => { for (const entry of [...vdesMessageHistory].reverse()) plotVdesMessage(entry); },
 });

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/wefax.ts

@@ -4,11 +4,13 @@
 
 import { hostCore } from "./host.js";
 
+import { forActiveRig, isActiveRigDecode } from "./active-rig.js";
 import type { PluginRuntimeWindow } from "./runtime-contract.js";
 
 export {};
 
 interface WefaxImage {
+  rig_id?: string | null;
   ts_ms?: number;
   ioc?: number;
   lpm?: number;
@@ -20,6 +22,7 @@ interface WefaxImage {
 }
 
 interface WefaxProgress {
+  rig_id?: string | null;
   state?: string;
   line_data?: string;
   line_count?: number;
@@ -156,15 +159,21 @@ function paintLine(lineBytes: Uint8Array): void {
 }
 
 // ── Live view: latest image card ────────────────────────────────────
+/** The pictures the selected rig decoded, newest first. */
+function wefaxRigImages(): WefaxImage[] {
+  return forActiveRig(wefaxImageHistory);
+}
+
 function renderWefaxLatestCard() {
   if (!wefaxDom.liveLatest) return;
-  if (wefaxImageHistory.length === 0) {
+  const rigImages = wefaxRigImages();
+  if (rigImages.length === 0) {
     wefaxDom.liveLatest.innerHTML =
       '<div style="color:var(--text-muted);font-size:0.82rem;">No images decoded yet. Enable the decoder and tune to a WEFAX station.</div>';
     return;
   }
 
-  const img = wefaxImageHistory[0];
+  const img = rigImages[0];
   if (!img) return;
   const ts = img._ts || '--';
   const date = img._tsMs ? new Date(img._tsMs).toLocaleDateString() : '';
@@ -193,7 +202,8 @@ function renderWefaxLatestCard() {
 
 // ── History view: table ─────────────────────────────────────────────
 function getWefaxFilteredHistory() {
-  let items = wefaxImageHistory;
+  // Every rig's pictures are kept; the panel shows the selected rig's.
+  let items = wefaxRigImages();
 
   if (wefaxFilterText) {
     items = items.filter(function (i) {
@@ -253,7 +263,7 @@ function renderWefaxHistoryTable() {
   wefaxDom.historyList.replaceChildren(fragment);
 
   if (wefaxDom.historyCount) {
-    const total = wefaxImageHistory.length;
+    const total = wefaxRigImages().length;
     const shown = items.length;
     wefaxDom.historyCount.textContent =
       total === 0
@@ -298,6 +308,9 @@ function addWefaxImage(msg: WefaxImage): void {
 
 // ── SSE event handlers (public API) ─────────────────────────────────
 function onServerWefaxProgress(msg: WefaxProgress): void {
+  // The live canvas draws one picture at a time: a background rig's lines
+  // would paint straight over the one being watched.
+  if (!isActiveRigDecode(msg.rig_id)) return;
   // State-only update (no image data): show decoder state in status.
   if (msg.state && !msg.line_data) {
     if (wefaxDom.status) {
@@ -331,6 +344,8 @@ function onServerWefaxProgress(msg: WefaxProgress): void {
 
 function onServerWefax(msg: WefaxImage): void {
   addWefaxImage(msg);
+  // Kept in the history either way, so switching to that rig finds it there.
+  if (!isActiveRigDecode(msg.rig_id)) return;
 
   if (wefaxDom.liveContainer) wefaxDom.liveContainer.style.display = 'none';
   if (wefaxDom.status) {
@@ -438,6 +453,7 @@ wefaxWindow.trxPluginRuntime.registerDecoder({
   restore: restoreWefaxHistory,
   prune: pruneWefaxHistoryView,
   reset: resetWefaxHistoryView,
+  rerender: () => { renderWefaxLatestCard(); renderWefaxHistoryTable(); },
 });
 wefaxWindow.trxPluginRuntime.registerDecoder({
   id: "wefax_progress",

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/wspr.ts

@@ -4,6 +4,7 @@
 
 import { hostCore } from "./host.js";
 
+import { forActiveRig, isActiveRigDecode } from "./active-rig.js";
 import type { PluginRuntimeWindow } from "./runtime-contract.js";
 
 export {};
@@ -15,6 +16,10 @@ interface WsprMessage {
   snr_db?: number | undefined;
   dt_s?: number | undefined;
   freq_hz?: number | undefined;
+  rig_id?: string | null | undefined;
+  /** RF frequency the spot was heard on, kept so a map replay does not
+   *  recompute it against wherever the dial has moved to since. */
+  _rfHz?: number | null | undefined;
   receiver?: unknown;
   [key: string]: unknown;
 }
@@ -102,10 +107,12 @@ function renderWsprRow(msg: WsprMessage): HTMLDivElement {
 function renderWsprHistory(): void {
   pruneWsprMessageHistory();
   if (!wsprMessagesEl) return;
+  // The history holds every rig's decodes, for the map; the panel is about the
+  // rig the operator is working.
+  const rigMessages = forActiveRig(wsprMessageHistory);
   const fragment = document.createDocumentFragment();
-  for (let i = 0; i < wsprMessageHistory.length; i += 1) {
+  for (const message of rigMessages) {
-    const message = wsprMessageHistory[i];
+    fragment.appendChild(renderWsprRow(message));
-    if (message) fragment.appendChild(renderWsprRow(message));
   }
   wsprMessagesEl.replaceChildren(fragment);
 }
@@ -130,6 +137,8 @@ function normalizeServerWsprMessage(msg: WsprMessage): { raw: string; grids: str
     station,
     rfHz,
     history: {
+      rig_id: msg.rig_id ?? null,
+      _rfHz: rfHz,
       receiver: wsprWindow.getDecodeRigMeta ? wsprWindow.getDecodeRigMeta() : null,
       ts_ms: msg.ts_ms,
       snr_db: msg.snr_db,
@@ -142,16 +151,12 @@ function normalizeServerWsprMessage(msg: WsprMessage): { raw: string; grids: str
 
 function onServerWsprBatch(messages: WsprMessage[]): void {
   if (!Array.isArray(messages) || messages.length === 0) return;
-  if (wsprStatus) wsprStatus.textContent = "Receiving";
   const normalized: WsprMessage[] = [];
   for (const msg of messages) {
     const next = normalizeServerWsprMessage(msg);
-    if (next.grids.length > 0 && wsprWindow.mapAddLocator) {
+    // "Receiving" is the panel's own status, and the panel is the rig's.
-      wsprWindow.mapAddLocator(next.raw, next.grids, "wspr", next.station, {
+    if (wsprStatus && isActiveRigDecode(msg.rig_id)) wsprStatus.textContent = "Receiving";
-        ...msg,
+    plotWsprLocator(msg);
-        ...(next.rfHz === null ? {} : { freq_hz: next.rfHz }),
-      });
-    }
     next.history._tsMs = Number.isFinite(next.history.ts_ms) ? Number(next.history.ts_ms) : Date.now();
     normalized.push(next.history);
   }
@@ -311,15 +316,24 @@ document.getElementById("settings-clear-wspr-history")?.addEventListener("click"
   })();
 });
 
-function onServerWspr(msg: WsprMessage): void {
+/** Hands a spot's grid squares to the map, if the map module is loaded yet.
-  if (wsprStatus) wsprStatus.textContent = "Receiving";
+ *  The module is lazy, so a spot heard before it arrived has to be replayable. */
+function plotWsprLocator(msg: WsprMessage): void {
   const next = normalizeServerWsprMessage(msg);
-  if (next.grids.length > 0 && wsprWindow.mapAddLocator) {
+  if (next.grids.length === 0 || !wsprWindow.mapAddLocator) return;
-    wsprWindow.mapAddLocator(next.raw, next.grids, "wspr", next.station, {
+  // A replayed spot carries the frequency it was heard on; a fresh one has it
-      ...msg,
+  // worked out from the dial it just arrived against.
-      ...(next.rfHz === null ? {} : { freq_hz: next.rfHz }),
+  const rfHz = finiteNumber(msg._rfHz) ?? next.rfHz;
-    });
+  wsprWindow.mapAddLocator(next.raw, next.grids, "wspr", next.station, {
-  }
+    ...msg,
+    ...(rfHz === null ? {} : { freq_hz: rfHz }),
+  });
+}
+
+function onServerWspr(msg: WsprMessage): void {
+  if (wsprStatus && isActiveRigDecode(msg.rig_id)) wsprStatus.textContent = "Receiving";
+  const next = normalizeServerWsprMessage(msg);
+  plotWsprLocator(msg);
   addWsprMessage(next.history);
 }
 
@@ -330,4 +344,7 @@ wsprWindow.trxPluginRuntime.registerDecoder({
   restore: onServerWsprBatch,
   prune: pruneWsprHistoryView,
   reset: resetWsprHistoryView,
+  rerender: renderWsprHistory,
+  // Oldest first, so the map builds the grids up in the order they were heard.
+  syncMap: () => { for (const message of [...wsprMessageHistory].reverse()) plotWsprLocator(message); },
 });

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/ui-core.ts

@@ -499,7 +499,7 @@ function elementById<T extends HTMLElement>(id: string): T {
       if (restoreFocus) more.focus();
     };
     api.closeMobileOverlays = closeMore;
-    ["statistics", "recorder", "settings", "about"].forEach((tabName) => {
+    ["satellites", "statistics", "recorder", "settings", "about"].forEach((tabName) => {
       const source = nav.querySelector(`[data-tab="${tabName}"]`);
       if (!source) return;
       const item = document.createElement("button");

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/active-rig.test.mjs

@@ -0,0 +1,348 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+// The radio page and the digital modes page both describe one rig: the one the
+// operator selected.  Every rig a client is connected to feeds the same decode
+// stream, so both the mini views over the waterfall and the panels behind them
+// filter on the rig that heard each decode.  The map is the exception and keeps
+// all of them — it has its own rig filter — which is why the histories these
+// views read from are never pruned by rig.
+
+import assert from "node:assert/strict";
+import test from "node:test";
+import vm from "node:vm";
+import { bundleEntry } from "./bundle-entry.mjs";
+import { createHost } from "./host-fixture.mjs";
+
+class ElementFixture {
+  constructor(value = "") {
+    this.children = [];
+    this.innerHTML = "";
+    this.textContent = "";
+    this.value = value;
+    this.style = {};
+    this.dataset = {};
+    this.classList = { add() {}, remove() {}, toggle() {} };
+  }
+  appendChild(child) { this.children.push(child); return child; }
+  removeChild(child) { this.children.splice(this.children.indexOf(child), 1); }
+  replaceChildren(...nodes) { this.children = nodes.flatMap((node) => node.children ?? [node]); }
+  addEventListener() {}
+  setAttribute() {}
+  querySelector() { return null; }
+  querySelectorAll() { return []; }
+  get firstChild() { return this.children[0] ?? null; }
+  get lastElementChild() { return this.children.at(-1) ?? null; }
+  get scrollHeight() { return this.children.length; }
+}
+
+/** A document whose named elements exist and whose unknown ones do not. */
+function createDocument(elements) {
+  return {
+    documentElement: {},
+    getElementById: (id) => elements.get(id) ?? null,
+    querySelector: () => null,
+    querySelectorAll: () => [],
+    createElement: () => new ElementFixture(),
+    createDocumentFragment: () => new ElementFixture(),
+  };
+}
+
+async function runPlugin(entry, { window, document: doc, extras = {} }) {
+  const context = vm.createContext({
+    window,
+    document: doc,
+    navigator: {},
+    requestAnimationFrame(callback) { callback(); return 1; },
+    getComputedStyle: () => ({ getPropertyValue: () => "" }),
+    Date, Number, String, Math, Array, Map, Set, Reflect, console,
+    ...extras,
+  });
+  const runtime = await bundleEntry(new URL("../src/plugin-runtime.ts", import.meta.url));
+  const source = await bundleEntry(new URL(`../src/plugins/${entry}.ts`, import.meta.url));
+  new vm.Script(runtime).runInContext(context);
+  new vm.Script(source).runInContext(context);
+  return context;
+}
+
+test("the APRS mini view and panel both keep to the active rig", async () => {
+  const overlay = new ElementFixture();
+  const packets = new ElementFixture();
+  const totals = new ElementFixture();
+  const elements = new Map([
+    ["aprs-bar-overlay", overlay],
+    ["aprs-packets", packets],
+    ["aprs-total-count", totals],
+    ["mode", new ElementFixture("PKT")],
+  ]);
+  const window = {
+    ...createHost({ state: { lastActiveRigId: "rig-a" } }),
+    trxUi: { confirm: async () => true },
+    aprsMapAddStation: () => {},
+  };
+  await runPlugin("aprs", { window, document: createDocument(elements) });
+
+  const frame = { dest_call: "APRS", packet_type: "position", crc_ok: true, info: "beacon" };
+  window.trxPluginRuntime.dispatch("aprs", { ...frame, src_call: "SP1AAA", rig_id: "rig-a" });
+  window.trxPluginRuntime.dispatch("aprs", { ...frame, src_call: "SP2BBB", rig_id: "rig-b" });
+
+  assert.match(overlay.innerHTML, /SP1AAA/, "the active rig's frame is missing from the mini view");
+  assert.doesNotMatch(overlay.innerHTML, /SP2BBB/, "a background rig's frame reached the mini view");
+  assert.equal(packets.children.length, 1, "the APRS panel listed a background rig's frame");
+  assert.equal(totals.textContent, "1 total", `the APRS panel counted "${totals.textContent}"`);
+});
+
+test("the APRS mini view shows every frame until a rig is known", async () => {
+  const overlay = new ElementFixture();
+  const elements = new Map([
+    ["aprs-bar-overlay", overlay],
+    ["mode", new ElementFixture("PKT")],
+  ]);
+  const window = {
+    ...createHost(),
+    trxUi: { confirm: async () => true },
+    aprsMapAddStation: () => {},
+  };
+  await runPlugin("aprs", { window, document: createDocument(elements) });
+
+  const frame = { dest_call: "APRS", packet_type: "position", crc_ok: true, info: "beacon" };
+  window.trxPluginRuntime.dispatch("aprs", { ...frame, src_call: "SP1AAA", rig_id: "rig-a" });
+  window.trxPluginRuntime.dispatch("aprs", { ...frame, src_call: "SP2BBB" });
+
+  assert.match(overlay.innerHTML, /SP1AAA/);
+  assert.match(overlay.innerHTML, /SP2BBB/);
+});
+
+test("the AIS mini view keeps to the active rig", async () => {
+  const overlay = new ElementFixture();
+  const elements = new Map([
+    ["ais-bar-overlay", overlay],
+    ["mode", new ElementFixture("AIS")],
+  ]);
+  const window = {
+    ...createHost({ state: { lastActiveRigId: "rig-a" } }),
+    trxUi: { confirm: async () => true },
+    aisMapAddVessel: () => {},
+  };
+  await runPlugin("ais", { window, document: createDocument(elements) });
+
+  const now = Date.now();
+  window.trxPluginRuntime.dispatch("ais", { mmsi: 261000001, vessel_name: "NEARBY", channel: "A", ts_ms: now, rig_id: "rig-a" });
+  window.trxPluginRuntime.dispatch("ais", { mmsi: 261000002, vessel_name: "ELSEWHERE", channel: "A", ts_ms: now, rig_id: "rig-b" });
+
+  assert.match(overlay.innerHTML, /NEARBY/);
+  assert.doesNotMatch(overlay.innerHTML, /ELSEWHERE/, "a background rig's vessel reached the mini view");
+});
+
+test("the VDES mini view keeps to the active rig", async () => {
+  const overlay = new ElementFixture();
+  const elements = new Map([
+    ["vdes-bar-overlay", overlay],
+    ["mode", new ElementFixture("VDES")],
+  ]);
+  const window = {
+    ...createHost({ state: { lastActiveRigId: "rig-a" } }),
+    trxUi: { confirm: async () => true },
+    vdesMapAddPoint: () => {},
+  };
+  await runPlugin("vdes", { window, document: createDocument(elements) });
+
+  const now = Date.now();
+  window.trxPluginRuntime.dispatch("vdes", { callsign: "SP1AAA", bit_len: 120, ts_ms: now, rig_id: "rig-a" });
+  window.trxPluginRuntime.dispatch("vdes", { callsign: "SP2BBB", bit_len: 120, ts_ms: now, rig_id: "rig-b" });
+
+  assert.match(overlay.innerHTML, /SP1AAA/);
+  assert.doesNotMatch(overlay.innerHTML, /SP2BBB/, "a background rig's burst reached the mini view");
+});
+
+test("the CW mini view keeps to the active rig and does not braid two rigs into a line", async () => {
+  const overlay = new ElementFixture();
+  const elements = new Map([
+    ["cw-bar-overlay", overlay],
+    ["cw-output", new ElementFixture()],
+    ["mode", new ElementFixture("CW")],
+  ]);
+  const window = {
+    ...createHost({ state: { lastActiveRigId: "rig-a" } }),
+    trxUi: { confirm: async () => true },
+    addEventListener() {},
+  };
+  await runPlugin("cw", { window, document: createDocument(elements) });
+
+  window.trxPluginRuntime.dispatch("cw", { text: "CQ ", wpm: 18, tone_hz: 700, rig_id: "rig-a" });
+  window.trxPluginRuntime.dispatch("cw", { text: "DX ", wpm: 22, tone_hz: 600, rig_id: "rig-b" });
+  window.trxPluginRuntime.dispatch("cw", { text: "SP1AAA", wpm: 18, tone_hz: 700, rig_id: "rig-a" });
+
+  assert.match(overlay.innerHTML, /CQ SP1AAA/, "the active rig's line was broken up or lost");
+  assert.doesNotMatch(overlay.innerHTML, /DX/, "a background rig's characters reached the mini view");
+});
+
+test("the FT8 mini view keeps to the active rig", async () => {
+  const overlay = new ElementFixture();
+  const elements = new Map([
+    ["ft8-bar-overlay", overlay],
+    ["mode", new ElementFixture("DIG")],
+  ]);
+  const window = {
+    ...createHost({ state: { lastActiveRigId: "rig-a" } }),
+    ft8BaseHz: 7_074_000,
+    trxUi: { confirm: async () => true },
+    mapAddLocator: () => {},
+    setInterval() { return 1; },
+  };
+  await runPlugin("ft8", { window, document: createDocument(elements) });
+
+  const now = Date.now();
+  window.trxPluginRuntime.dispatch("ft8", { message: "CQ SP1AAA JO91", freq_hz: 500, ts_ms: now, rig_id: "rig-a" });
+  window.trxPluginRuntime.dispatch("ft8", { message: "CQ SP2BBB JO94", freq_hz: 800, ts_ms: now, rig_id: "rig-b" });
+
+  assert.match(overlay.innerHTML, /SP1AAA/);
+  assert.doesNotMatch(overlay.innerHTML, /SP2BBB/, "a background rig's decode reached the mini view");
+});
+
+// ── The digital modes panels ───────────────────────────────────────────────
+// The same rule one page over: a panel lists the selected rig's decodes only.
+
+test("the AIS panel lists the active rig's vessels only", async () => {
+  const messages = new ElementFixture();
+  const count = new ElementFixture();
+  const elements = new Map([
+    ["ais-messages", messages],
+    ["ais-vessel-count", count],
+    ["mode", new ElementFixture("AIS")],
+  ]);
+  const window = {
+    ...createHost({ state: { lastActiveRigId: "rig-a" } }),
+    trxUi: { confirm: async () => true },
+    aisMapAddVessel: () => {},
+  };
+  await runPlugin("ais", { window, document: createDocument(elements) });
+
+  const now = Date.now();
+  window.trxPluginRuntime.dispatch("ais", { mmsi: 261000001, vessel_name: "NEARBY", channel: "A", ts_ms: now, rig_id: "rig-a" });
+  window.trxPluginRuntime.dispatch("ais", { mmsi: 261000002, vessel_name: "ELSEWHERE", channel: "A", ts_ms: now, rig_id: "rig-b" });
+
+  assert.equal(messages.children.length, 1, "the AIS panel listed a background rig's vessel");
+  assert.equal(count.textContent, "1 vessel", `the panel counted "${count.textContent}"`);
+});
+
+test("the VDES panel lists the active rig's bursts only", async () => {
+  const messages = new ElementFixture();
+  const count = new ElementFixture();
+  const elements = new Map([
+    ["vdes-messages", messages],
+    ["vdes-frame-count", count],
+    ["mode", new ElementFixture("VDES")],
+  ]);
+  const window = {
+    ...createHost({ state: { lastActiveRigId: "rig-a" } }),
+    trxUi: { confirm: async () => true },
+    vdesMapAddPoint: () => {},
+  };
+  await runPlugin("vdes", { window, document: createDocument(elements) });
+
+  const now = Date.now();
+  window.trxPluginRuntime.dispatch("vdes", { callsign: "SP1AAA", bit_len: 120, ts_ms: now, rig_id: "rig-a" });
+  window.trxPluginRuntime.dispatch("vdes", { callsign: "SP2BBB", bit_len: 120, ts_ms: now, rig_id: "rig-b" });
+
+  assert.equal(messages.children.length, 1, "the VDES panel listed a background rig's burst");
+  assert.equal(count.textContent, "1 burst", `the panel counted "${count.textContent}"`);
+});
+
+test("the FT8 panel lists the active rig's decodes only", async () => {
+  const messages = new ElementFixture();
+  const elements = new Map([
+    ["ft8-messages", messages],
+    ["mode", new ElementFixture("DIG")],
+  ]);
+  const window = {
+    ...createHost({ state: { lastActiveRigId: "rig-a" } }),
+    ft8BaseHz: 7_074_000,
+    trxUi: { confirm: async () => true },
+    mapAddLocator: () => {},
+    setInterval() { return 1; },
+  };
+  await runPlugin("ft8", { window, document: createDocument(elements) });
+
+  const now = Date.now();
+  window.trxPluginRuntime.dispatch("ft8", { message: "CQ SP1AAA JO91", freq_hz: 500, ts_ms: now, rig_id: "rig-a" });
+  window.trxPluginRuntime.dispatch("ft8", { message: "CQ SP2BBB JO94", freq_hz: 800, ts_ms: now, rig_id: "rig-b" });
+
+  assert.equal(messages.children.length, 1, "the FT8 panel listed a background rig's decode");
+});
+
+test("the WSPR panel lists the active rig's spots only", async () => {
+  const messages = new ElementFixture();
+  const elements = new Map([
+    ["wspr-messages", messages],
+    ["mode", new ElementFixture("DIG")],
+  ]);
+  const window = {
+    ...createHost({ state: { lastActiveRigId: "rig-a" } }),
+    ft8BaseHz: 14_095_600,
+    trxUi: { confirm: async () => true },
+    mapAddLocator: () => {},
+  };
+  await runPlugin("wspr", {
+    window,
+    document: createDocument(elements),
+    extras: { setInterval: () => 1 },
+  });
+
+  const now = Date.now();
+  window.trxPluginRuntime.dispatch("wspr", { message: "SP1AAA JO91 30", freq_hz: 1_500, ts_ms: now, rig_id: "rig-a" });
+  window.trxPluginRuntime.dispatch("wspr", { message: "SP2BBB JO94 27", freq_hz: 1_520, ts_ms: now, rig_id: "rig-b" });
+
+  assert.equal(messages.children.length, 1, "the WSPR panel listed a background rig's spot");
+});
+
+test("the CW pane copies the active rig only", async () => {
+  const output = new ElementFixture();
+  const elements = new Map([
+    ["cw-output", output],
+    ["cw-bar-overlay", new ElementFixture()],
+    ["mode", new ElementFixture("CW")],
+  ]);
+  const window = {
+    ...createHost({ state: { lastActiveRigId: "rig-a" } }),
+    trxUi: { confirm: async () => true },
+    addEventListener() {},
+  };
+  await runPlugin("cw", { window, document: createDocument(elements) });
+
+  window.trxPluginRuntime.dispatch("cw", { text: "CQ ", wpm: 18, tone_hz: 700, rig_id: "rig-a" });
+  window.trxPluginRuntime.dispatch("cw", { text: "XX ", wpm: 22, tone_hz: 600, rig_id: "rig-b" });
+  window.trxPluginRuntime.dispatch("cw", { text: "SP1AAA", wpm: 18, tone_hz: 700, rig_id: "rig-a" });
+
+  const copied = output.children.map((line) => line.textContent).join("");
+  assert.equal(copied, "CQ SP1AAA", `the pane copied "${copied}"`);
+});
+
+test("switching rigs repaints the panels through the runtime", async () => {
+  const packets = new ElementFixture();
+  const elements = new Map([
+    ["aprs-packets", packets],
+    ["aprs-bar-overlay", new ElementFixture()],
+    ["mode", new ElementFixture("PKT")],
+  ]);
+  // A mutable host: the rig picker writes lastActiveRigId, and the panels read
+  // it as they paint.
+  const host = createHost({ state: { lastActiveRigId: "rig-a" } });
+  let activeRigId = "rig-a";
+  Object.defineProperty(host.trx.state, "lastActiveRigId", { get: () => activeRigId });
+  const window = { ...host, trxUi: { confirm: async () => true }, aprsMapAddStation: () => {} };
+  await runPlugin("aprs", { window, document: createDocument(elements) });
+
+  const frame = { dest_call: "APRS", packet_type: "position", crc_ok: true, info: "beacon" };
+  window.trxPluginRuntime.dispatch("aprs", { ...frame, src_call: "SP1AAA", rig_id: "rig-a" });
+  window.trxPluginRuntime.dispatch("aprs", { ...frame, src_call: "SP2BBB", rig_id: "rig-b" });
+  assert.equal(packets.children.length, 1);
+
+  activeRigId = "rig-b";
+  window.trxPluginRuntime.rerenderAll();
+  assert.equal(packets.children.length, 1, "the panel did not follow the switch");
+  const shown = packets.children.map((row) => row.innerHTML).join("");
+  assert.match(shown, /SP2BBB/, "the panel still shows the rig that was switched away from");
+  assert.doesNotMatch(shown, /SP1AAA/);
+});

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/background-decode.mjs

@@ -0,0 +1,138 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+// The background decode panel: one list that both picks the bookmarks and says
+// what each one is doing. It used to be two lists of the same bookmarks — one
+// to choose from, one to read state off — and it filled neither until the
+// operator switched rigs, because it took whatever rig it was handed at load
+// and that was nothing yet.
+
+import assert from "node:assert/strict";
+import { chromium } from "playwright-core";
+import { startBrowser, startWebFixture } from "./web-fixture.mjs";
+
+/* global document */
+
+const BOOKMARKS = [
+  { id: "bm-ft8-20", name: "FT8 20 m", freq_hz: 14_074_000, mode: "USB", decoders: ["ft8"] },
+  { id: "bm-ft8-40", name: "FT8 40 m", freq_hz: 7_074_000, mode: "USB", decoders: ["ft8"] },
+  { id: "bm-ft4-20", name: "FT4 20 m", freq_hz: 14_080_000, mode: "USB", decoders: ["ft4"] },
+  { id: "bm-aprs", name: "APRS 2 m", freq_hz: 144_800_000, mode: "PKT", decoders: ["aprs"] },
+  // Nothing that runs in the background can decode CW, so it must not be offered.
+  { id: "bm-cw", name: "CW practice", freq_hz: 7_030_000, mode: "CW", decoders: ["cw"] },
+];
+
+const backgroundDecode = {
+  config: { remote: "rig-a", enabled: true, bookmark_ids: ["bm-ft8-20", "bm-ft8-40", "bm-aprs"] },
+  status: {
+    active_rig: true,
+    center_hz: 14_100_000,
+    sample_rate: 2_400_000,
+    entries: [
+      { bookmark_id: "bm-ft8-20", bookmark_name: "FT8 20 m", freq_hz: 14_074_000, mode: "USB", decoder_kinds: ["ft8"], state: "active" },
+      { bookmark_id: "bm-ft8-40", bookmark_name: "FT8 40 m", freq_hz: 7_074_000, mode: "USB", decoder_kinds: ["ft8"], state: "out_of_span" },
+      { bookmark_id: "bm-aprs", bookmark_name: "APRS 2 m", freq_hz: 144_800_000, mode: "PKT", decoder_kinds: ["aprs"], state: "handled_by_scheduler" },
+    ],
+  },
+};
+
+const readRows = () => page.evaluate(() => {
+  const rows = [...document.querySelectorAll("#bgd-bookmark-checklist .bgd-checklist-row")];
+  return rows.map((row) => ({
+    name: row.querySelector(".bgd-checklist-name")?.textContent ?? "",
+    checked: row.querySelector("input[type=checkbox]")?.checked ?? false,
+    state: row.querySelector(".bgd-state")?.dataset.state ?? null,
+    stateText: row.querySelector(".bgd-state")?.textContent?.trim() ?? "",
+  }));
+});
+
+const openPanel = async () => {
+  await page.goto(`${fixture.origin}/settings`, { waitUntil: "domcontentloaded" });
+  await page.locator("#tab-settings").waitFor({ state: "visible" });
+  await page.waitForTimeout(2000);
+  await page.locator('.sub-tab[data-subtab="settings-background-decode"]').click();
+  await page.waitForTimeout(1200);
+};
+
+const fixture = await startWebFixture({ spectrum: true, bookmarks: BOOKMARKS, backgroundDecode });
+const { browser, page, runtimeErrors } = await startBrowser(chromium);
+
+try {
+  await page.setViewportSize({ width: 1400, height: 950 });
+  await openPanel();
+
+  // Nothing was switched, clicked or reloaded: the panel asked the host which
+  // rig it is on and filled itself.
+  const rows = await readRows();
+  assert.deepEqual(rows.map((row) => row.name), ["FT8 20 m", "FT8 40 m", "FT4 20 m", "APRS 2 m"],
+    "the list does not hold the bookmarks a background channel can decode");
+  assert.deepEqual(rows.map((row) => row.checked), [true, true, false, true],
+    "the saved selection is not reflected in the list");
+
+  // Each row carries its own state, so there is no second list to consult.
+  assert.deepEqual(rows.map((row) => row.state),
+    ["active", "out_of_span", "unselected", "handled_by_scheduler"],
+    "the rows do not carry the state of the bookmark they name");
+  assert.match(rows[0].stateText, /Decoding/);
+  assert.match(rows[1].stateText, /Out of span/);
+
+  // What the rig can hear, and what the selection adds up to.
+  const context = await page.evaluate(() => ({
+    span: document.getElementById("bgd-span-summary")?.textContent?.trim(),
+    summary: document.getElementById("bgd-selection-summary")?.textContent?.trim(),
+  }));
+  assert.match(context.span, /14\.1 MHz/, `the span reads "${context.span}"`);
+  assert.match(context.summary, /3 bookmarks selected, 1 decoding now\./, `the summary reads "${context.summary}"`);
+
+  // Save has nothing to do until something changes, and says so again once it
+  // has been done.
+  const saveState = () => page.evaluate(() => {
+    const btn = document.getElementById("background-decode-save-btn");
+    return { disabled: btn.disabled, dirty: btn.classList.contains("sch-dirty") };
+  });
+  assert.deepEqual(await saveState(), { disabled: true, dirty: false }, "Save offers itself with nothing to save");
+
+  await page.locator('#bgd-bookmark-checklist .bgd-checklist-row:nth-child(3) input').click();
+  await page.waitForTimeout(300);
+  assert.deepEqual(await saveState(), { disabled: false, dirty: true }, "Save stayed inert after a change");
+
+  await page.locator("#background-decode-save-btn").click();
+  await page.waitForTimeout(1000);
+  assert.deepEqual(await saveState(), { disabled: true, dirty: false }, "Save stayed live after saving");
+
+  // The selection reached the server and comes back on the next load.
+  await openPanel();
+  const saved = await readRows();
+  assert.deepEqual(saved.map((row) => row.checked), [true, true, true, true],
+    "the newly selected bookmark did not survive a reload");
+
+  assert.deepEqual(runtimeErrors, []);
+} finally {
+  await browser.close();
+  await fixture.close();
+}
+
+// With no bookmarks at all the panel says what to do about it rather than
+// showing an empty box.
+const emptyFixture = await startWebFixture({ spectrum: true, bookmarks: [] });
+const empty = await startBrowser(chromium);
+try {
+  await empty.page.setViewportSize({ width: 1400, height: 950 });
+  await empty.page.goto(`${emptyFixture.origin}/settings`, { waitUntil: "domcontentloaded" });
+  await empty.page.locator("#tab-settings").waitFor({ state: "visible" });
+  await empty.page.waitForTimeout(2000);
+  await empty.page.locator('.sub-tab[data-subtab="settings-background-decode"]').click();
+  await empty.page.waitForTimeout(1000);
+  const text = await empty.page.evaluate(() =>
+    document.getElementById("bgd-bookmark-checklist")?.textContent?.trim() ?? "");
+  assert.match(text, /No bookmarks yet/, `the empty list reads "${text}"`);
+  const summary = await empty.page.evaluate(() =>
+    document.getElementById("bgd-selection-summary")?.textContent?.trim() ?? "");
+  assert.match(summary, /Nothing selected/, `the summary reads "${summary}"`);
+} finally {
+  await empty.browser.close();
+  await emptyFixture.close();
+}
+
+console.log("background decode panel tests passed");

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/decode-flow.mjs

@@ -22,9 +22,25 @@ const BEACON = {
   packet_type: "position", crc_ok: true, lat: 54.35, lon: 18.65,
   symbol_table: "/", symbol_code: ">", rig_id: "rig-a",
 };
+// A second rig listening in the background, on its own band. Both pages
+// describe the rig on screen, so its traffic belongs in neither the panel nor
+// the mini view — only on the map, which shows the whole station.
+// HF APRS travels a different band and a different path from the VHF list, so
+// it goes on the map under a source of its own that the filter can hide.
+const HF_BEACON = {
+  type: "hf_aprs", src_call: "SP5HF-7", dest_call: "APRS", path: "WIDE2-2", info: "HF beacon",
+  packet_type: "position", crc_ok: true, lat: 50.06, lon: 19.94,
+  symbol_table: "/", symbol_code: ">", rig_id: "rig-a",
+};
+const OTHER_RIG_VESSEL = {
+  ...VESSEL, mmsi: 244660001, vessel_name: "ELDERBERRY", callsign: "PBTY",
+  lat: 51.92, lon: 4.48, rig_id: "rig-b",
+};
 
 // AIS is what the mini view for vessels is gated on; the rig has to be on it.
-const fixture = await startWebFixture({ spectrum: true, decodes: [VESSEL, BEACON], mode: "AIS" });
+const fixture = await startWebFixture({
+  spectrum: true, decodes: [VESSEL, BEACON, HF_BEACON, OTHER_RIG_VESSEL], mode: "AIS",
+});
 const { browser, page, runtimeErrors } = await startBrowser(chromium);
 
 try {
@@ -41,11 +57,14 @@ try {
     aprs: document.getElementById("aprs-packets")?.children.length ?? 0,
     aisStatus: document.getElementById("ais-status")?.textContent ?? "",
     aprsStatus: document.getElementById("aprs-status")?.textContent ?? "",
+    otherRig: document.getElementById("ais-messages")?.textContent.includes("ELDERBERRY") ?? false,
+    aisRows: document.getElementById("ais-messages")?.children.length ?? 0,
     mapLoaded: !!window.trx.modules.map,
   }));
   assert.equal(panels.mapLoaded, false, "the map module was loaded, so this proves nothing");
   assert.ok(panels.ais > 0, `the AIS panel is empty (status: ${panels.aisStatus})`);
   assert.ok(panels.aprs > 0, `the APRS panel is empty (status: ${panels.aprsStatus})`);
+  assert.equal(panels.otherRig, false, "the AIS panel listed a background rig's vessel");
 
   // The mini view rides over the waterfall on the radio page.
   await page.locator('.tab[data-tab="main"]').click();
@@ -56,11 +75,13 @@ try {
       shown: getComputedStyle(bar).display !== "none",
       pins: bar.querySelectorAll(".aprs-bar-pin").length,
       names: bar.textContent.includes("NEDERLAND"),
+      otherRig: bar.textContent.includes("ELDERBERRY"),
     };
   });
   assert.equal(miniView.shown, true, "the AIS mini view did not appear");
   assert.ok(miniView.pins > 0, "the mini view has no pin to follow");
   assert.equal(miniView.names, true, "the mini view does not name the vessel");
+  assert.equal(miniView.otherRig, false, "the mini view shows a background rig's vessel");
 
   // Following the pin: the map opens, on the vessel. This is the path that was
   // broken for every decoder — the module that owned the navigation had not
@@ -89,8 +110,41 @@ try {
       : Object.keys(collection ?? {}).length);
     return { ais: size(map?.aisMarkers), stations: size(map?.stationMarkers) };
   });
-  assert.ok(markers.ais > 0, "the vessel never reached the map");
   assert.ok(markers.stations > 0, "the APRS station never reached the map");
+  // Both APRS stations are on it, each under its own source: the HF one used
+  // to be dropped entirely, since the HF list never plotted anything.
+  const aprsSources = await page.evaluate(() => {
+    const entries = [...(window.trx.modules.map?.stationMarkers ?? new Map()).entries()];
+    return entries.map(([key, entry]) => `${entry?.type ?? "?"}:${entry?.call ?? key}`).sort();
+  });
+  assert.deepEqual(aprsSources, ["aprs:SP2SJG-9", "hf_aprs:SP5HF-7"],
+    `the map holds ${JSON.stringify(aprsSources)}`);
+  // And the filter offers HF APRS on a chip of its own, next to the VHF one.
+  await page.locator('#map-locator-phase .map-locator-phase-btn[data-phase="type"]').click();
+  await page.waitForTimeout(400);
+  const chips = await page.evaluate(() => [...document.querySelectorAll("#map-locator-choice-filter .map-locator-chip")]
+    .map((chip) => chip.dataset.filterKey));
+  assert.ok(chips.includes("aprs") && chips.includes("hf_aprs"),
+    `the Show chips are ${JSON.stringify(chips)}`);
+
+  // Turning that chip off takes the HF station off the map and leaves the VHF
+  // one on: the two are filtered apart, which is the whole point of the split.
+  await page.locator('#map-locator-choice-filter .map-locator-chip[data-filter-key="hf_aprs"]').click();
+  await page.waitForTimeout(500);
+  const shownAfterFilter = await page.evaluate(() => {
+    const map = window.trx.modules.map;
+    const onMap = [];
+    (map?.stationMarkers ?? new Map()).forEach((entry, key) => {
+      if (entry?.marker && map.aprsMap?.hasLayer(entry.marker)) onMap.push(entry?.call ?? key);
+    });
+    return onMap.sort();
+  });
+  assert.deepEqual(shownAfterFilter, ["SP2SJG-9"],
+    `hiding HF APRS left ${JSON.stringify(shownAfterFilter)} on the map`);
+  // The map is the whole station's view — the one place a background rig's
+  // traffic belongs — so both vessels are on it even though the panel and the
+  // mini view show only the selected rig's.
+  assert.equal(markers.ais, 2, `${markers.ais} of 2 vessels reached the map`);
 
   assert.deepEqual(runtimeErrors, []);
 } finally {
@@ -103,6 +157,8 @@ try {
 // left the client on its retry path and the history path untested.
 const HISTORY_AIS = 900;
 const HISTORY_APRS = 300;
+const HISTORY_FT8 = 12;
+const HISTORY_WSPR = 8;
 const historyFixture = await startWebFixture({
   spectrum: true,
   mode: "AIS",
@@ -112,6 +168,14 @@ const historyFixture = await startWebFixture({
       vessel_name: `HISTORIC ${index}`, channel: "A", message_type: 1,
       rig_id: "rig-a", ts_ms: Date.now() - (index + 1) * 1000,
     })),
+    ft8: Array.from({ length: HISTORY_FT8 }, (_, index) => ({
+      message: `CQ SP${index}ABC JO${String(index).padStart(2, "0")}`, snr_db: -7, dt_s: 0.2,
+      freq_hz: 1200 + index, rig_id: "rig-a", ts_ms: Date.now() - (index + 1) * 1000,
+    })),
+    wspr: Array.from({ length: HISTORY_WSPR }, (_, index) => ({
+      message: `SP${index}XYZ JN${String(index).padStart(2, "0")} 30`, snr_db: -22, dt_s: 0.5,
+      freq_hz: 1500 + index, rig_id: "rig-a", ts_ms: Date.now() - (index + 1) * 1000,
+    })),
     aprs: Array.from({ length: HISTORY_APRS }, (_, index) => ({
       src_call: `SP2SJG-${index % 15}`, dest_call: "APRS", path: "WIDE1-1",
       info: `history ${index}`, packet_type: "position", crc_ok: true,
@@ -199,6 +263,27 @@ try {
   assert.equal(plotted.ais, HISTORY_AIS, `${plotted.ais} of ${HISTORY_AIS} vessels reached the map`);
   assert.equal(plotted.stations, 15, `${plotted.stations} of 15 stations reached the map`);
 
+  // The Statistics page counts the same history. Its decode log lives in the
+  // map module, which is lazy, so every decode that arrived before the module
+  // did used to be recorded into nothing at all — the page opened empty and
+  // only filled in from decodes heard afterwards, and it took a reload landing
+  // on the tab (module loaded at startup, before the history) to show the lot.
+  await replay.page.evaluate(() => window.navigateToTab("statistics"));
+  await replay.page.waitForTimeout(1500);
+  // The counters are written with toLocaleString(), so a four-figure count
+  // arrives as "1,220" — whichever separator the runner's locale picks. Read
+  // the digits rather than the formatting.
+  const counted = await replay.page.evaluate(() => {
+    const count = (id) => Number((document.getElementById(id)?.textContent ?? "").replace(/\D/g, ""));
+    return { decodes: count("stats-total-decodes"), grids: count("stats-unique-grids") };
+  });
+  assert.equal(counted.decodes, HISTORY_AIS + HISTORY_APRS + HISTORY_FT8 + HISTORY_WSPR,
+    `the statistics counted ${counted.decodes} decodes`);
+  // Grid squares come from the FT8 and WSPR spots, which had no map replay of
+  // their own: the locators of everything heard before the map loaded were lost.
+  assert.equal(counted.grids, HISTORY_FT8 + HISTORY_WSPR,
+    `the statistics counted ${counted.grids} grid squares`);
+
   assert.deepEqual(replay.runtimeErrors, []);
 } finally {
   await replay.browser.close();

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/satellite-predictions.mjs

@@ -0,0 +1,122 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+// Pass predictions used to be a third view inside the weather-satellite
+// decoder, under Digital modes — a planning tool filed with the decoders it has
+// nothing to do with. It is its own page now, so what this guards is that the
+// page exists at its own address, renders passes, and that the decoder card no
+// longer offers the view it gave up.
+
+import assert from "node:assert/strict";
+import { chromium } from "playwright-core";
+import { startBrowser, startWebFixture } from "./web-fixture.mjs";
+
+/* global document, window, getComputedStyle */
+
+const HOUR = 3_600_000;
+const now = Date.now();
+const satPasses = {
+  satellite_count: 2,
+  passes: [
+    // In progress right now, so the page has a countdown to run.
+    {
+      satellite: "NOAA 19", category: "weather",
+      aos_ms: now - 4 * 60_000, los_ms: now + 6 * 60_000,
+      max_elevation_deg: 62.4, duration_s: 600,
+      azimuth_aos_deg: 10, azimuth_los_deg: 190,
+    },
+    {
+      satellite: "ISS", category: "amateur",
+      aos_ms: now + 2 * HOUR, los_ms: now + 2 * HOUR + 480_000,
+      max_elevation_deg: 18.2, duration_s: 480,
+      azimuth_aos_deg: 200, azimuth_los_deg: 20,
+    },
+  ],
+};
+
+const fixture = await startWebFixture({ satPasses });
+const { browser, page, runtimeErrors } = await startBrowser(chromium);
+
+try {
+  await page.setViewportSize({ width: 1500, height: 950 });
+
+  // The page is reachable at its own address, not through a decoder sub-view.
+  // #content is the radio panel on the main tab, so the readiness signal for a
+  // deep link is the destination panel itself.
+  await page.goto(`${fixture.origin}/satellites`, { waitUntil: "domcontentloaded" });
+  await page.locator("#tab-satellites").waitFor({ state: "visible" });
+
+  await page.waitForFunction(
+    () => (document.getElementById("sat-pred-list")?.childElementCount ?? 0) > 0,
+    null,
+    { timeout: 5000 },
+  );
+
+  const rendered = await page.evaluate(() => ({
+    current: document.getElementById("sat-pred-current-list").textContent,
+    upcoming: document.getElementById("sat-pred-list").textContent,
+    status: document.getElementById("sat-pred-status").textContent,
+    activeTab: document.querySelector(".tab-bar .tab.active")?.dataset.tab,
+  }));
+  assert.match(rendered.current, /NOAA 19/, `current passes read "${rendered.current}"`);
+  assert.match(rendered.upcoming, /ISS/, `upcoming passes read "${rendered.upcoming}"`);
+  assert.match(rendered.status, /1 active/, `status reads "${rendered.status}"`);
+  assert.equal(rendered.activeTab, "satellites", "the Satellites tab is the active one");
+
+  // A pass in progress counts down, so the seconds have to move on their own.
+  const firstTick = await page.evaluate(
+    () => document.querySelector(".sat-pred-col-countdown[data-los]")?.textContent);
+  await page.waitForTimeout(1600);
+  const secondTick = await page.evaluate(
+    () => document.querySelector(".sat-pred-col-countdown[data-los]")?.textContent);
+  assert.notEqual(firstTick, secondTick, `the countdown sat at ${firstTick}`);
+
+  // Leaving stops the countdown rather than leaving a timer running behind a
+  // hidden page.
+  await page.evaluate(() => { window.navigateToTab("main"); });
+  await page.waitForTimeout(300);
+  const afterLeaving = await page.evaluate(() => ({
+    visible: document.getElementById("tab-satellites").style.display,
+    rows: document.getElementById("sat-pred-current-list").childElementCount,
+  }));
+  assert.equal(afterLeaving.visible, "none", "the page stayed on screen after navigating away");
+  assert.equal(afterLeaving.rows, 0, "the countdown rows outlived the page");
+
+  // Coming back reloads rather than showing whatever was there before.
+  await page.evaluate(() => { window.navigateToTab("satellites"); });
+  await page.waitForFunction(
+    () => (document.getElementById("sat-pred-list")?.childElementCount ?? 0) > 0,
+    null,
+    { timeout: 5000 },
+  );
+
+  // The page is an occasional destination, so it lives behind Tools rather than
+  // taking a slot in the operating strip — the same treatment Statistics,
+  // Recorder, Settings and About get.
+  const nav = await page.evaluate(() => ({
+    inStrip: getComputedStyle(document.querySelector('.tab-bar-nav .tab[data-tab="satellites"]')).display,
+    inTools: !!document.querySelector('#mobile-more-menu [data-navigate-tab="satellites"]'),
+  }));
+  assert.equal(nav.inStrip, "none", "Satellites took a slot in the operating strip");
+  assert.ok(nav.inTools, "Satellites is not reachable from Tools");
+
+  // The decoder card keeps Live and History, and no longer offers Predictions.
+  await page.goto(`${fixture.origin}/digital-modes`, { waitUntil: "domcontentloaded" });
+  await page.locator("#tab-digital-modes").waitFor({ state: "visible" });
+  const satCard = await page.evaluate(() => ({
+    predictionsButton: !!document.getElementById("sat-view-predictions"),
+    predictionsView: !!document.getElementById("sat-predictions-view"),
+    live: !!document.getElementById("sat-view-live"),
+    history: !!document.getElementById("sat-view-history"),
+  }));
+  assert.equal(satCard.predictionsButton, false, "the decoder card still offers Predictions");
+  assert.equal(satCard.predictionsView, false, "the old predictions view is still in the page");
+  assert.ok(satCard.live && satCard.history, "the decoder card lost Live/History");
+
+  assert.deepEqual(runtimeErrors, [], "the page threw while showing predictions");
+  console.log("satellite predictions page tests passed");
+} finally {
+  await browser.close();
+  await fixture.close();
+}

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/tune-links.mjs

@@ -27,6 +27,21 @@ const dial = () => page.evaluate(() => ({
   path: window.location.pathname,
 }));
 
+// Typed, not filled. The app holds back its own refreshes of the frequency
+// field from the first keystroke until Enter, so that a state update arriving
+// mid-edit does not rewrite what is being typed. `fill()` sets the value
+// without a keystroke, leaving the field unguarded: on a slow machine a state
+// update could land between the fill and the Enter and put the old frequency
+// back, and the Enter would then re-apply the frequency the radio was already
+// on. Selecting first arms the guard before a single character changes.
+async function tuneByHand(text) {
+  const field = page.locator("#freq");
+  await field.click();
+  await field.press("ControlOrMeta+a");
+  await field.pressSequentially(text);
+  await field.press("Enter");
+}
+
 try {
   await page.setViewportSize({ width: 1500, height: 950 });
 
@@ -49,8 +64,7 @@ try {
 
   // Tuning by hand rewrites the link. This is the part that makes the address
   // bar shareable at any moment rather than only at load.
-  await page.locator("#freq").fill("7.040M");
+  await tuneByHand("7.040M");
-  await page.locator("#freq").press("Enter");
   await page.waitForTimeout(1500);
   const tuned = await dial();
   assert.equal(tuned.freqHz, TUNED_HZ, `tuning landed on ${tuned.freqHz} Hz`);
@@ -59,8 +73,7 @@ try {
 
   // Tuning is not navigation: a swept dial must not bury the back button.
   const historyLength = await page.evaluate(() => window.history.length);
-  await page.locator("#freq").fill("7.100M");
+  await tuneByHand("7.100M");
-  await page.locator("#freq").press("Enter");
   await page.waitForTimeout(1200);
   assert.equal(await page.evaluate(() => window.history.length), historyLength,
     "tuning pushed a history entry instead of replacing one");

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/web-fixture.mjs

@@ -34,7 +34,14 @@ const DECODER_REGISTRY = [
   { id: "aprs", label: "APRS", activation: "toggle", active_modes: ["FM"] },
   { id: "hf-aprs", label: "HF APRS", activation: "toggle", active_modes: ["USB"] },
   { id: "vdes", label: "VDES", activation: "toggle", active_modes: ["FM"] },
-].map((decoder) => ({ ...decoder, background_decode: false, bookmark_selectable: true }));
+].map((decoder) => ({
+  ...decoder,
+  // Which decoders a background channel can run, as the server's own registry
+  // has it: the background decode panel offers a bookmark only if one of these
+  // can decode it, so marking them all false left that panel with nothing.
+  background_decode: ["ft8", "ft4", "ft2", "wspr", "ais", "aprs", "hf-aprs"].includes(decoder.id),
+  bookmark_selectable: true,
+}));
 
 const CONTENT_TYPES = new Map([
   [".css", "text/css; charset=utf-8"],
@@ -132,9 +139,11 @@ export async function startWebFixture({
   mode = "FM",
   history = {},
   bookmarks = [],
+  backgroundDecode = null,
   bandplan = {},
   bandplanEnabled = false,
   bandplanUnauthorizedFirst = false,
+  satPasses = null,
 } = {}) {
   const rigItems = ["rig-a", "rig-b"].map((remote) => ({
     remote,
@@ -230,6 +239,7 @@ export async function startWebFixture({
     ["/bandplan.json", bandplan],
     ["/api/recorder/status", []],
     ["/api/recorder/files", []],
+    ["/sat_passes", satPasses ?? { satellite_count: 0, passes: [] }],
   ]);
 
   // Flat i8 bins: the shape does not matter, only that frames arrive so the
@@ -269,6 +279,34 @@ export async function startWebFixture({
       response.writeHead(200).end();
       return;
     }
+    // Background decode: the panel reads its config, its status, and the
+    // bookmark list, and writes the config back.
+    if (url.pathname.startsWith("/background-decode/")) {
+      const isStatus = url.pathname.endsWith("/status");
+      if (isStatus) {
+        response.writeHead(200, { "content-type": "application/json" });
+        response.end(JSON.stringify(backgroundDecode?.status ?? { entries: [] }));
+        return;
+      }
+      if (request.method === "PUT") {
+        const body = await new Promise((resolve) => {
+          let raw = "";
+          request.on("data", (chunk) => { raw += chunk; });
+          request.on("end", () => resolve(raw));
+        });
+        try {
+          const parsed = JSON.parse(body);
+          if (backgroundDecode) backgroundDecode.config = parsed;
+        } catch { /* leave the config as it was */ }
+      }
+      if (request.method === "DELETE" && backgroundDecode) {
+        backgroundDecode.config = { remote: "rig-a", enabled: false, bookmark_ids: [] };
+      }
+      response.writeHead(200, { "content-type": "application/json" });
+      response.end(JSON.stringify(backgroundDecode?.config
+        ?? { remote: "rig-a", enabled: false, bookmark_ids: [] }));
+      return;
+    }
     if (url.pathname === "/select_rig" && request.method === "POST") {
       const remote = url.searchParams.get("remote");
       if (remote) {

src/trx-client/trx-frontend/trx-frontend-http/src/api/assets.rs

@@ -10,7 +10,9 @@ use actix_web::{get, HttpRequest, HttpResponse, Responder};
 use std::collections::HashMap;
 use std::sync::OnceLock;
 
-use super::{gz_cache_entry, static_asset_response, GzCacheEntry, FAVICON_BYTES, LOGO_BYTES};
+use super::{
+    gz_cache_entry, static_asset_response, AssetCaching, GzCacheEntry, FAVICON_BYTES, LOGO_BYTES,
+};
 use crate::server::status;
 
 // ---------------------------------------------------------------------------
@@ -62,49 +64,100 @@ define_gz_cache!(gz_leaflet_css, status::LEAFLET_CSS, "leaflet.css");
 #[get("/")]
 pub(crate) async fn index(req: HttpRequest) -> impl Responder {
     let c = gz_index_html();
-    static_asset_response(&req, "text/html; charset=utf-8", c)
+    static_asset_response(
+        &req,
+        "text/html; charset=utf-8",
+        c,
+        AssetCaching::Revalidate,
+    )
 }
 
 #[get("/map")]
 pub(crate) async fn map_index(req: HttpRequest) -> impl Responder {
     let c = gz_index_html();
-    static_asset_response(&req, "text/html; charset=utf-8", c)
+    static_asset_response(
+        &req,
+        "text/html; charset=utf-8",
+        c,
+        AssetCaching::Revalidate,
+    )
 }
 
 #[get("/digital-modes")]
 pub(crate) async fn digital_modes_index(req: HttpRequest) -> impl Responder {
     let c = gz_index_html();
-    static_asset_response(&req, "text/html; charset=utf-8", c)
+    static_asset_response(
+        &req,
+        "text/html; charset=utf-8",
+        c,
+        AssetCaching::Revalidate,
+    )
 }
 
 #[get("/recorder")]
 pub(crate) async fn recorder_index(req: HttpRequest) -> impl Responder {
     let c = gz_index_html();
-    static_asset_response(&req, "text/html; charset=utf-8", c)
+    static_asset_response(
+        &req,
+        "text/html; charset=utf-8",
+        c,
+        AssetCaching::Revalidate,
+    )
 }
 
 #[get("/settings")]
 pub(crate) async fn settings_index(req: HttpRequest) -> impl Responder {
     let c = gz_index_html();
-    static_asset_response(&req, "text/html; charset=utf-8", c)
+    static_asset_response(
+        &req,
+        "text/html; charset=utf-8",
+        c,
+        AssetCaching::Revalidate,
+    )
 }
 
 #[get("/about")]
 pub(crate) async fn about_index(req: HttpRequest) -> impl Responder {
     let c = gz_index_html();
-    static_asset_response(&req, "text/html; charset=utf-8", c)
+    static_asset_response(
+        &req,
+        "text/html; charset=utf-8",
+        c,
+        AssetCaching::Revalidate,
+    )
 }
 
 #[get("/statistics")]
 pub(crate) async fn statistics_index(req: HttpRequest) -> impl Responder {
     let c = gz_index_html();
-    static_asset_response(&req, "text/html; charset=utf-8", c)
+    static_asset_response(
+        &req,
+        "text/html; charset=utf-8",
+        c,
+        AssetCaching::Revalidate,
+    )
+}
+
+#[get("/satellites")]
+pub(crate) async fn satellites_index(req: HttpRequest) -> impl Responder {
+    let c = gz_index_html();
+    static_asset_response(
+        &req,
+        "text/html; charset=utf-8",
+        c,
+        AssetCaching::Revalidate,
+    )
 }
 
 #[get("/bookmarks")]
 pub(crate) async fn bookmarks_index(req: HttpRequest) -> impl Responder {
     let c = gz_index_html();
-    static_asset_response(&req, "text/html; charset=utf-8", c)
+    static_asset_response(
+        &req,
+        "text/html; charset=utf-8",
+        c,
+        AssetCaching::Revalidate,
+    )
 }
 
 // ---------------------------------------------------------------------------
@@ -142,13 +195,13 @@ pub(crate) async fn logo() -> impl Responder {
 #[get("/style.css")]
 pub(crate) async fn style_css(req: HttpRequest) -> impl Responder {
     let c = gz_style_css();
-    static_asset_response(&req, "text/css; charset=utf-8", c)
+    static_asset_response(&req, "text/css; charset=utf-8", c, AssetCaching::Revalidate)
 }
 
 #[get("/themes.css")]
 pub(crate) async fn themes_css(req: HttpRequest) -> impl Responder {
     let c = gz_themes_css();
-    static_asset_response(&req, "text/css; charset=utf-8", c)
+    static_asset_response(&req, "text/css; charset=utf-8", c, AssetCaching::Revalidate)
 }
 
 // Generated filenames are supplied only by build.rs and resolved through this
@@ -172,7 +225,22 @@ pub(crate) async fn generated_asset(req: HttpRequest, path: web::Path<String>) -
     let Some(entry) = generated_asset_cache().get(filename.as_str()) else {
         return HttpResponse::NotFound().finish();
     };
-    static_asset_response(&req, content_type, entry)
+    static_asset_response(
+        &req,
+        content_type,
+        entry,
+        generated_asset_caching(&filename),
+    )
+}
+
+/// esbuild names shared chunks `chunk-<hash>.js` and leaves the entry points on
+/// a fixed name, so only the chunks are safe to keep forever.
+fn generated_asset_caching(filename: &str) -> AssetCaching {
+    if filename.starts_with("chunk-") {
+        AssetCaching::Immutable
+    } else {
+        AssetCaching::Revalidate
+    }
 }
 
 /// Serve a received SSTV picture out of the local cache.
@@ -215,7 +283,12 @@ fn cached_png(decoder: &str, filename: &str) -> HttpResponse {
 #[get("/bandplan.json")]
 pub(crate) async fn bandplan_json(req: HttpRequest) -> impl Responder {
     let c = gz_bandplan_json();
-    static_asset_response(&req, "application/json; charset=utf-8", c)
+    static_asset_response(
+        &req,
+        "application/json; charset=utf-8",
+        c,
+        AssetCaching::Revalidate,
+    )
 }
 
 // ---------------------------------------------------------------------------
@@ -233,7 +306,12 @@ pub(crate) async fn dseg14_classic_woff2() -> impl Responder {
 #[get("/vendor/opus-decoder-0.7.11.min.js")]
 pub(crate) async fn opus_decoder_js(req: HttpRequest) -> impl Responder {
     let c = gz_opus_decoder_js();
-    static_asset_response(&req, "application/javascript; charset=utf-8", c)
+    static_asset_response(
+        &req,
+        "application/javascript; charset=utf-8",
+        c,
+        AssetCaching::Immutable,
+    )
 }
 
 // ---------------------------------------------------------------------------
@@ -243,13 +321,18 @@ pub(crate) async fn opus_decoder_js(req: HttpRequest) -> impl Responder {
 #[get("/vendor/leaflet.js")]
 pub(crate) async fn leaflet_js(req: HttpRequest) -> impl Responder {
     let c = gz_leaflet_js();
-    static_asset_response(&req, "application/javascript; charset=utf-8", c)
+    static_asset_response(
+        &req,
+        "application/javascript; charset=utf-8",
+        c,
+        AssetCaching::Revalidate,
+    )
 }
 
 #[get("/vendor/leaflet.css")]
 pub(crate) async fn leaflet_css(req: HttpRequest) -> impl Responder {
     let c = gz_leaflet_css();
-    static_asset_response(&req, "text/css; charset=utf-8", c)
+    static_asset_response(&req, "text/css; charset=utf-8", c, AssetCaching::Revalidate)
 }
 
 #[get("/vendor/marker-icon.png")]
@@ -349,6 +432,44 @@ mod tests {
         assert!(!generated_asset_cache().contains_key("../app.js"));
     }
 
+    /// A browser that visited before an upgrade must not keep the old page.
+    /// index.html, the stylesheets and the entry bundles all keep their URL
+    /// from one build to the next, so an immutable year-long policy on them
+    /// leaves a client running whatever it first downloaded — a fixed layout
+    /// stays broken in the browser that happened to cache it, and no reload
+    /// short of a forced one gets the fix.
+    #[test]
+    fn assets_that_keep_their_url_across_builds_are_revalidated() {
+        for name in ["app.js", "aprs.js", "map-core.js"] {
+            assert_eq!(
+                generated_asset_caching(name),
+                AssetCaching::Revalidate,
+                "{name} is served from the same URL after every build"
+            );
+        }
+        assert_eq!(
+            AssetCaching::Revalidate.header_value(),
+            "no-cache",
+            "revalidating assets must ask before they are reused"
+        );
+    }
+
+    /// Only the chunks carry a hash of their own bytes, so only they can be
+    /// kept forever.
+    #[test]
+    fn content_addressed_chunks_stay_immutable() {
+        let chunk = status::GENERATED_ASSETS
+            .iter()
+            .map(|(name, _)| *name)
+            .find(|name| name.starts_with("chunk-"))
+            .expect("the bundle splits into at least one shared chunk");
+        assert_eq!(generated_asset_caching(chunk), AssetCaching::Immutable);
+        assert!(
+            AssetCaching::Immutable.header_value().contains("immutable"),
+            "a hashed name is safe to keep"
+        );
+    }
+
     #[test]
     fn generated_asset_mime_types_are_restricted() {
         assert_eq!(

src/trx-client/trx-frontend/trx-frontend-http/src/api/mod.rs

@@ -307,10 +307,35 @@ where
 }
 
 /// Pre-compressed (gzip + brotli) + ETag-aware response for immutable embedded assets.
+/// How long a browser may hold an asset before asking about it again.
+#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+pub(crate) enum AssetCaching {
+    /// The name carries a hash of the bytes, so a change is a new URL and the
+    /// old one can be kept forever.
+    Immutable,
+    /// Served from the same URL for the life of the deployment, with different
+    /// bytes after an upgrade: index.html, the stylesheets, the entry bundles.
+    /// These must be revalidated, or a browser that visited before the upgrade
+    /// keeps running the old page — for a year, with the ETag never consulted,
+    /// which is how a fixed layout stays broken in one browser and not another.
+    /// The ETag makes the revalidation a 304 in the usual case.
+    Revalidate,
+}
+
+impl AssetCaching {
+    pub(crate) fn header_value(self) -> &'static str {
+        match self {
+            Self::Immutable => "public, max-age=31536000, immutable",
+            Self::Revalidate => "no-cache",
+        }
+    }
+}
+
 fn static_asset_response(
     req: &HttpRequest,
     content_type: &'static str,
     entry: &GzCacheEntry,
+    caching: AssetCaching,
 ) -> HttpResponse {
     let etag = &entry.etag;
     // Check If-None-Match for conditional GET.
@@ -319,7 +344,7 @@ fn static_asset_response(
             if val == etag || val == "*" {
                 return HttpResponse::NotModified()
                     .insert_header((header::ETAG, etag.to_owned()))
-                    .insert_header((header::CACHE_CONTROL, "public, max-age=31536000, immutable"))
+                    .insert_header((header::CACHE_CONTROL, caching.header_value()))
                     .finish();
             }
         }
@@ -339,7 +364,7 @@ fn static_asset_response(
         .insert_header((header::CONTENT_TYPE, content_type))
         .insert_header((header::CONTENT_ENCODING, encoding))
         .insert_header((header::ETAG, etag.to_owned()))
-        .insert_header((header::CACHE_CONTROL, "public, max-age=31536000, immutable"))
+        .insert_header((header::CACHE_CONTROL, caching.header_value()))
         .body(Bytes::copy_from_slice(body))
 }
 
@@ -639,6 +664,7 @@ pub fn configure(cfg: &mut web::ServiceConfig) {
         .service(assets::recorder_index)
         .service(assets::settings_index)
         .service(assets::about_index)
+        .service(assets::satellites_index)
         .service(assets::statistics_index)
         .service(assets::bookmarks_index)
         .service(assets::favicon)
@@ -839,6 +865,76 @@ mod tests {
     // Endpoint tests using actix_web::test
     // ======================================================================
 
+    /// The page and the bundles it pulls in are served from the same URLs after
+    /// every upgrade, so the browser has to ask whether they changed.  Served
+    /// as immutable for a year, a browser that visited once kept the old page
+    /// and never saw a fix again -- which is how a corrected layout stays
+    /// broken in one browser while every other one has it.
+    #[actix_web::test]
+    async fn documents_and_entry_bundles_are_revalidated_not_frozen() {
+        let app = actix_test::init_service(
+            App::new()
+                .service(assets::index)
+                .service(assets::style_css)
+                .service(assets::generated_asset),
+        )
+        .await;
+
+        for path in ["/", "/style.css", "/app.js"] {
+            let req = actix_test::TestRequest::get().uri(path).to_request();
+            let resp = actix_test::call_service(&app, req).await;
+            assert_eq!(resp.status(), 200, "{path} should be served");
+            let cache_control = resp
+                .headers()
+                .get(header::CACHE_CONTROL)
+                .and_then(|value| value.to_str().ok())
+                .unwrap_or_default();
+            assert_eq!(cache_control, "no-cache", "{path} must be revalidated");
+            assert!(
+                resp.headers().contains_key(header::ETAG),
+                "{path} needs an ETag, or revalidating costs a full download"
+            );
+        }
+    }
+
+    /// Revalidation has to stay cheap: an unchanged asset answers 304, and the
+    /// policy on that answer matches the one on the body.
+    #[actix_web::test]
+    async fn an_unchanged_document_answers_not_modified() {
+        let app = actix_test::init_service(App::new().service(assets::style_css)).await;
+
+        let first = actix_test::call_service(
+            &app,
+            actix_test::TestRequest::get()
+                .uri("/style.css")
+                .to_request(),
+        )
+        .await;
+        let etag = first
+            .headers()
+            .get(header::ETAG)
+            .and_then(|value| value.to_str().ok())
+            .expect("style.css carries an ETag")
+            .to_owned();
+
+        let conditional = actix_test::call_service(
+            &app,
+            actix_test::TestRequest::get()
+                .uri("/style.css")
+                .insert_header((header::IF_NONE_MATCH, etag))
+                .to_request(),
+        )
+        .await;
+        assert_eq!(conditional.status(), 304);
+        assert_eq!(
+            conditional
+                .headers()
+                .get(header::CACHE_CONTROL)
+                .and_then(|value| value.to_str().ok()),
+            Some("no-cache")
+        );
+    }
+
     /// GET /status returns 200 with valid JSON containing rig snapshot fields.
     #[actix_web::test]
     async fn test_status_endpoint_returns_json() {

src/trx-config/src/client.rs

@@ -76,6 +76,8 @@ pub struct RemoteConfig {
     pub auth: RemoteAuthConfig,
     /// Poll interval in milliseconds.
     pub poll_interval_ms: u64,
+    /// Spectrum frame interval in milliseconds.
+    pub spectrum_interval_ms: u64,
 }
 
 impl Default for RemoteConfig {
@@ -85,6 +87,7 @@ impl Default for RemoteConfig {
             rig_id: None,
             auth: RemoteAuthConfig::default(),
             poll_interval_ms: 750,
+            spectrum_interval_ms: default_spectrum_interval_ms(),
         }
     }
 }
@@ -121,12 +124,23 @@ pub struct RemoteEntry {
     /// Poll interval in milliseconds. Defaults to 750.
     #[serde(default = "default_poll_interval_ms")]
     pub poll_interval_ms: u64,
+    /// How often spectrum frames are wanted from this server, in milliseconds.
+    /// Defaults to 50 (20 frames/s).
+    ///
+    /// Raise it on a slow or high-latency link: spectrum is by far the largest
+    /// thing on the connection, and the server pushes no faster than this.
+    #[serde(default = "default_spectrum_interval_ms")]
+    pub spectrum_interval_ms: u64,
 }
 
 fn default_poll_interval_ms() -> u64 {
     750
 }
 
+fn default_spectrum_interval_ms() -> u64 {
+    50
+}
+
 /// Frontend configurations.
 #[derive(Debug, Clone, Default, Serialize, Deserialize)]
 #[serde(default)]
@@ -421,6 +435,7 @@ impl ClientConfig {
                 rig_id: self.remote.rig_id.clone(),
                 auth: self.remote.auth.clone(),
                 poll_interval_ms: self.remote.poll_interval_ms,
+                spectrum_interval_ms: self.remote.spectrum_interval_ms,
             }]
         } else {
             Vec::new()
@@ -603,12 +618,21 @@ impl ClientConfig {
                     i, entry.name
                 ));
             }
+            if entry.spectrum_interval_ms == 0 {
+                return Err(format!(
+                    "[[remotes]][{}].spectrum_interval_ms must be > 0 (name \"{}\")",
+                    i, entry.name
+                ));
+            }
         }
 
         // Legacy [remote], kept for backward compatibility.
         if self.remote.poll_interval_ms == 0 {
             return Err("[remote].poll_interval_ms must be > 0".to_string());
         }
+        if self.remote.spectrum_interval_ms == 0 {
+            return Err("[remote].spectrum_interval_ms must be > 0".to_string());
+        }
         if let Some(url) = &self.remote.url {
             if url.trim().is_empty() {
                 return Err("[remote].url must not be empty when set".to_string());
@@ -834,6 +858,7 @@ impl ClientConfig {
                         token_file: None,
                     },
                     poll_interval_ms: 750,
+                    spectrum_interval_ms: 50,
                 },
                 RemoteEntry {
                     name: "home-vhf".to_string(),
@@ -844,6 +869,7 @@ impl ClientConfig {
                         token_file: None,
                     },
                     poll_interval_ms: 750,
+                    spectrum_interval_ms: 50,
                 },
             ],
             frontends: FrontendsConfig {
@@ -994,6 +1020,7 @@ impl ConfigFile for ClientConfig {
                 rig_id: Some("hf".to_string()),
                 auth: RemoteAuthConfig::default(),
                 poll_interval_ms: default_poll_interval_ms(),
+                spectrum_interval_ms: 50,
             }],
             ..Default::default()
         };
@@ -1311,6 +1338,7 @@ url = "remote.example.com:4530"
                 rig_id: None,
                 auth: RemoteAuthConfig::default(),
                 poll_interval_ms: 750,
+                spectrum_interval_ms: 50,
             }],
             ..Default::default()
         };
@@ -1330,6 +1358,7 @@ url = "remote.example.com:4530"
                     token_file: None,
                 },
                 poll_interval_ms: 750,
+                spectrum_interval_ms: 50,
             },
             ..Default::default()
         };
@@ -1368,6 +1397,7 @@ url = "remote.example.com:4530"
                 rig_id: None,
                 auth: RemoteAuthConfig::default(),
                 poll_interval_ms: 750,
+                spectrum_interval_ms: 50,
             }],
             ..Default::default()
         };
@@ -1386,6 +1416,7 @@ url = "remote.example.com:4530"
                     rig_id: None,
                     auth: RemoteAuthConfig::default(),
                     poll_interval_ms: 750,
+                    spectrum_interval_ms: 50,
                 },
                 RemoteEntry {
                     name: "dup".to_string(),
@@ -1393,6 +1424,7 @@ url = "remote.example.com:4530"
                     rig_id: None,
                     auth: RemoteAuthConfig::default(),
                     poll_interval_ms: 750,
+                    spectrum_interval_ms: 50,
                 },
             ],
             ..Default::default()
@@ -1409,6 +1441,7 @@ url = "remote.example.com:4530"
                 rig_id: None,
                 auth: RemoteAuthConfig::default(),
                 poll_interval_ms: 750,
+                spectrum_interval_ms: 50,
             }],
             ..Default::default()
         };
@@ -1427,6 +1460,7 @@ url = "remote.example.com:4530"
                 rig_id: None,
                 auth: RemoteAuthConfig::default(),
                 poll_interval_ms: 750,
+                spectrum_interval_ms: 50,
             }],
             ..Default::default()
         };
@@ -1445,6 +1479,7 @@ url = "remote.example.com:4530"
                 rig_id: None,
                 auth: RemoteAuthConfig::default(),
                 poll_interval_ms: 0,
+                spectrum_interval_ms: 50,
             }],
             ..Default::default()
         };
@@ -1499,6 +1534,45 @@ url = "remote.example.com:4530"
         assert!(warnings.is_empty(), "unexpected warnings: {warnings:?}");
     }
 
+    // --- Spectrum cadence ---
+
+    #[test]
+    fn test_spectrum_interval_defaults_and_parses() {
+        let config: ClientConfig = toml::from_str(
+            r#"
+[[remotes]]
+name = "slow-link"
+url = "host:4530"
+spectrum_interval_ms = 500
+
+[[remotes]]
+name = "lan"
+url = "host2:4530"
+"#,
+        )
+        .unwrap();
+        assert_eq!(config.remotes[0].spectrum_interval_ms, 500);
+        assert_eq!(config.remotes[1].spectrum_interval_ms, 50);
+        assert!(config.validate().is_ok());
+    }
+
+    #[test]
+    fn test_validate_rejects_zero_spectrum_interval() {
+        let config: ClientConfig = toml::from_str(
+            r#"
+[[remotes]]
+name = "hf"
+url = "host:4530"
+spectrum_interval_ms = 0
+"#,
+        )
+        .unwrap();
+        assert!(config
+            .validate()
+            .unwrap_err()
+            .contains("spectrum_interval_ms"));
+    }
+
     // --- Secret indirection ---
 
     fn secret_file(content: &str) -> tempfile::NamedTempFile {
@@ -1537,6 +1611,7 @@ url = "remote.example.com:4530"
                     token_file: Some(f.path().to_str().unwrap().to_string()),
                 },
                 poll_interval_ms: 750,
+                spectrum_interval_ms: 50,
             }],
             ..Default::default()
         };
@@ -1570,6 +1645,7 @@ url = "remote.example.com:4530"
                 rig_id: None,
                 auth: RemoteAuthConfig::default(),
                 poll_interval_ms: 750,
+                spectrum_interval_ms: 50,
             })
             .collect()
     }

src/trx-config/src/server.rs

@@ -399,12 +399,30 @@ pub struct SdrConfig {
     /// Default: 4.
     #[serde(default = "default_max_virtual_channels")]
     pub max_virtual_channels: usize,
+    /// FFT bin count for the spectrum display.  Must be a power of two.
+    ///
+    /// Halving it halves both the DSP cost and the bytes each frame puts on
+    /// the network, at half the frequency resolution — worth it on a slow link.
+    #[serde(default = "default_spectrum_fft_size")]
+    pub spectrum_fft_size: usize,
+    /// How often the server pushes a spectrum frame to a subscribed client, in
+    /// milliseconds.  Raise it on a slow or metered link.
+    #[serde(default = "default_spectrum_interval_ms")]
+    pub spectrum_interval_ms: u64,
 }
 
 fn default_max_virtual_channels() -> usize {
     4
 }
 
+fn default_spectrum_fft_size() -> usize {
+    1024
+}
+
+fn default_spectrum_interval_ms() -> u64 {
+    50
+}
+
 impl Default for SdrConfig {
     fn default() -> Self {
         Self {
@@ -417,6 +435,8 @@ impl Default for SdrConfig {
             noise_blanker: SdrNoiseBlankerConfig::default(),
             channels: Vec::new(),
             max_virtual_channels: default_max_virtual_channels(),
+            spectrum_fft_size: default_spectrum_fft_size(),
+            spectrum_interval_ms: default_spectrum_interval_ms(),
         }
     }
 }
@@ -913,6 +933,9 @@ fn validate_rig_instance(
             errors.push(format!("{prefix}[sdr.gain].max_value must be >= 0"));
         }
     }
+    if let Err(e) = validate_spectrum_config(prefix, &rig.sdr) {
+        errors.push(e);
+    }
     if let Err(e) = validate_sdr_squelch_config(&format!("{prefix}[sdr.squelch]"), &rig.sdr.squelch)
     {
         errors.push(e);
@@ -1070,6 +1093,26 @@ fn validate_access(prefix: &str, access: &AccessConfig) -> Result<(), String> {
     Ok(())
 }
 
+/// A non-power-of-two FFT size still plans, but costs far more per frame; the
+/// bounds keep the display useful without letting a typo allocate a huge FFT.
+fn validate_spectrum_config(prefix: &str, sdr: &SdrConfig) -> Result<(), String> {
+    let size = sdr.spectrum_fft_size;
+    if !(128..=8192).contains(&size) {
+        return Err(format!(
+            "{prefix}[sdr].spectrum_fft_size must be in range 128..=8192"
+        ));
+    }
+    if !size.is_power_of_two() {
+        return Err(format!(
+            "{prefix}[sdr].spectrum_fft_size must be a power of two (got {size})"
+        ));
+    }
+    if sdr.spectrum_interval_ms == 0 {
+        return Err(format!("{prefix}[sdr].spectrum_interval_ms must be > 0"));
+    }
+    Ok(())
+}
+
 fn validate_sdr_squelch_config(path: &str, squelch: &SdrSquelchConfig) -> Result<(), String> {
     if !squelch.threshold_db.is_finite() {
         return Err(format!("{path}.threshold_db must be finite"));
@@ -1813,6 +1856,93 @@ port = 4531
         assert!(warnings.is_empty(), "unexpected warnings: {warnings:?}");
     }
 
+    // --- Spectrum transport knobs ---
+
+    #[test]
+    fn test_spectrum_defaults() {
+        let cfg = SdrConfig::default();
+        assert_eq!(cfg.spectrum_fft_size, 1024);
+        assert_eq!(cfg.spectrum_interval_ms, 50);
+    }
+
+    fn sdr_cfg_with_spectrum(fft_size: usize, interval_ms: u64) -> ServerConfig {
+        let mut cfg = ServerConfig::default();
+        cfg.rig.access.port = Some("/dev/ttyUSB0".to_string());
+        cfg.rig.access.baud = Some(9600);
+        cfg.sdr.spectrum_fft_size = fft_size;
+        cfg.sdr.spectrum_interval_ms = interval_ms;
+        cfg
+    }
+
+    #[test]
+    fn test_validate_accepts_smaller_power_of_two_fft() {
+        assert!(sdr_cfg_with_spectrum(256, 200).validate().is_ok());
+    }
+
+    #[test]
+    fn test_validate_rejects_non_power_of_two_fft() {
+        let err = sdr_cfg_with_spectrum(1000, 50)
+            .validate()
+            .expect_err("expected a power-of-two error");
+        assert!(err.contains("power of two"), "unexpected error: {err}");
+    }
+
+    #[test]
+    fn test_validate_rejects_out_of_range_fft() {
+        assert!(sdr_cfg_with_spectrum(64, 50).validate().is_err());
+        assert!(sdr_cfg_with_spectrum(16384, 50).validate().is_err());
+    }
+
+    #[test]
+    fn test_validate_rejects_zero_spectrum_interval() {
+        let err = sdr_cfg_with_spectrum(1024, 0)
+            .validate()
+            .expect_err("expected an interval error");
+        assert!(
+            err.contains("spectrum_interval_ms"),
+            "unexpected error: {err}"
+        );
+    }
+
+    /// Per-rig validation covers the spectrum knobs too, and names the rig.
+    #[test]
+    fn test_validate_rejects_bad_spectrum_size_in_rig_entry() {
+        let toml_str = r#"
+[[rigs]]
+id = "sdr"
+[rigs.rig]
+model = "soapysdr"
+[rigs.rig.access]
+type = "sdr"
+args = "driver=rtlsdr"
+[rigs.audio]
+port = 4532
+tx_enabled = false
+[rigs.sdr]
+spectrum_fft_size = 999
+"#;
+        let cfg: ServerConfig = toml::from_str(toml_str).unwrap();
+        let err = cfg.validate().expect_err("expected a power-of-two error");
+        assert!(
+            err.contains("power of two") && err.contains("sdr"),
+            "unexpected error: {err}"
+        );
+    }
+
+    #[test]
+    fn test_parse_spectrum_config_from_toml() {
+        let cfg: ServerConfig = toml::from_str(
+            r#"
+[sdr]
+spectrum_fft_size = 512
+spectrum_interval_ms = 250
+"#,
+        )
+        .unwrap();
+        assert_eq!(cfg.sdr.spectrum_fft_size, 512);
+        assert_eq!(cfg.sdr.spectrum_interval_ms, 250);
+    }
+
     // --- Secret indirection ---
 
     #[test]

src/trx-core/Cargo.toml

@@ -17,3 +17,4 @@ uuid = { workspace = true }
 ts-rs = { version = "12.0.1", features = ["uuid-impl"] }
 sgp4 = "2"
 reqwest = { version = "0.12", default-features = false, features = ["rustls-tls"] }
+base64 = "0.22"

src/trx-core/src/rig/mod.rs

@@ -19,6 +19,7 @@ pub mod command;
 pub mod controller;
 pub mod request;
 pub mod response;
+pub mod spectrum_wire;
 pub mod state;
 
 /// How this backend communicates with the rig.

src/trx-core/src/rig/spectrum_wire.rs

@@ -0,0 +1,124 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+//! Compact wire encoding for spectrum bins.
+//!
+//! Bins are dBFS magnitudes, and the web UI has always drawn them from `i8`
+//! values — the SSE hop to the browser quantizes and base64-encodes them. The
+//! server→client hop, which is the one that crosses the operator's network,
+//! used to send the same information as a JSON array of `f32`: around ten bytes
+//! per bin instead of one, or roughly 10 KB per 1024-bin frame.
+//!
+//! Bins therefore travel as base64-encoded `i8` dBFS, about an eighth of the
+//! size, at a resolution the display already rounds to. Decoding still accepts
+//! the old array form, so a new client can read an older server.
+
+use base64::engine::general_purpose::STANDARD as BASE64;
+use base64::Engine as _;
+use serde::de::{SeqAccess, Visitor};
+use serde::{Deserializer, Serializer};
+use std::fmt;
+
+/// Quantize to whole dBFS and encode as base64.
+pub fn serialize<S: Serializer>(bins: &[f32], serializer: S) -> Result<S::Ok, S::Error> {
+    let quantized: Vec<u8> = bins
+        .iter()
+        .map(|&db| {
+            let clamped = if db.is_finite() { db } else { -128.0 };
+            clamped.round().clamp(-128.0, 127.0) as i8 as u8
+        })
+        .collect();
+    serializer.serialize_str(&BASE64.encode(quantized))
+}
+
+/// Decode base64 bins, or a plain array of numbers from an older server.
+pub fn deserialize<'de, D: Deserializer<'de>>(deserializer: D) -> Result<Vec<f32>, D::Error> {
+    deserializer.deserialize_any(BinsVisitor)
+}
+
+struct BinsVisitor;
+
+impl<'de> Visitor<'de> for BinsVisitor {
+    type Value = Vec<f32>;
+
+    fn expecting(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.write_str("base64-encoded i8 dBFS bins, or an array of numbers")
+    }
+
+    fn visit_str<E: serde::de::Error>(self, value: &str) -> Result<Self::Value, E> {
+        let bytes = BASE64
+            .decode(value)
+            .map_err(|e| E::custom(format!("invalid base64 spectrum bins: {e}")))?;
+        Ok(bytes.into_iter().map(|byte| byte as i8 as f32).collect())
+    }
+
+    fn visit_seq<A: SeqAccess<'de>>(self, mut seq: A) -> Result<Self::Value, A::Error> {
+        let mut bins = Vec::with_capacity(seq.size_hint().unwrap_or(1024));
+        while let Some(value) = seq.next_element::<f32>()? {
+            bins.push(value);
+        }
+        Ok(bins)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use serde::{Deserialize, Serialize};
+
+    #[derive(Debug, Serialize, Deserialize, PartialEq)]
+    struct Frame {
+        #[serde(with = "super")]
+        bins: Vec<f32>,
+    }
+
+    #[test]
+    fn test_round_trip_quantizes_to_whole_db() {
+        let frame = Frame {
+            bins: vec![-73.4, -20.6, 0.0, -120.2],
+        };
+        let json = serde_json::to_string(&frame).unwrap();
+        let back: Frame = serde_json::from_str(&json).unwrap();
+        assert_eq!(back.bins, vec![-73.0, -21.0, 0.0, -120.0]);
+    }
+
+    #[test]
+    fn test_serializes_as_a_base64_string() {
+        let json = serde_json::to_string(&Frame {
+            bins: vec![-1.0, 0.0],
+        })
+        .unwrap();
+        assert!(json.contains('"'), "bins should be a string: {json}");
+        assert!(!json.contains('['), "bins should not be an array: {json}");
+    }
+
+    #[test]
+    fn test_clamps_out_of_range_and_non_finite() {
+        let frame = Frame {
+            bins: vec![-400.0, 400.0, f32::NAN, f32::NEG_INFINITY],
+        };
+        let json = serde_json::to_string(&frame).unwrap();
+        let back: Frame = serde_json::from_str(&json).unwrap();
+        assert_eq!(back.bins, vec![-128.0, 127.0, -128.0, -128.0]);
+    }
+
+    #[test]
+    fn test_reads_the_old_array_form() {
+        let back: Frame = serde_json::from_str(r#"{"bins":[-73.25,-20.5]}"#).unwrap();
+        assert_eq!(back.bins, vec![-73.25, -20.5]);
+    }
+
+    /// The point of the change: an ordinary frame gets much smaller.
+    #[test]
+    fn test_frame_is_far_smaller_than_the_array_form() {
+        let bins: Vec<f32> = (0..1024).map(|i| -60.0 - (i % 40) as f32 * 0.37).collect();
+        let compact = serde_json::to_string(&Frame { bins: bins.clone() }).unwrap();
+        let verbose = serde_json::to_string(&bins).unwrap();
+        assert!(
+            compact.len() * 5 < verbose.len(),
+            "compact {} bytes vs array {} bytes",
+            compact.len(),
+            verbose.len()
+        );
+    }
+}

src/trx-core/src/rig/state.rs

@@ -394,6 +394,12 @@ fn default_wfm_denoise_level() -> WfmDenoiseLevel {
 #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, TS)]
 pub struct SpectrumData {
     /// FFT magnitude bins in dBFS, FFT-shifted so DC (centre frequency) is at index N/2.
+    ///
+    /// On the wire these are base64-encoded `i8` whole dBFS (see
+    /// `spectrum_wire`), which is what the display draws anyway; the TypeScript
+    /// type describes the decoded array the browser receives over SSE.
+    #[serde(with = "crate::rig::spectrum_wire")]
+    #[ts(type = "Array<number>")]
     pub bins: Vec<f32>,
     /// Centre frequency of the SDR capture in Hz.
     #[ts(type = "number")]

src/trx-protocol/src/lib.rs

@@ -18,4 +18,6 @@ pub use auth::{NoAuthValidator, SimpleTokenValidator, TokenValidator};
 pub use codec::{mode_to_string, parse_envelope, parse_mode};
 pub use decoders::{DecoderActivation, DecoderDescriptor, DECODER_REGISTRY};
 pub use mapping::{client_command_to_rig, rig_command_to_client};
-pub use types::{ClientCommand, ClientEnvelope, ClientResponse, MeterUpdate, RigEntry};
+pub use types::{
+    ClientCommand, ClientEnvelope, ClientResponse, MeterUpdate, RigEntry, SpectrumFrame,
+};

src/trx-protocol/src/mapping.rs

@@ -102,7 +102,7 @@ macro_rules! define_command_mapping {
 
 define_command_mapping! {
     // ── Client-only variants (no RigCommand counterpart) ─────────────
-    client_only: GetRigs, GetSatPasses, SubscribeMeter;
+    client_only: GetRigs, GetSatPasses, SubscribeMeter, SubscribeSpectrum;
 
     // ── Unit variants (no payload) ───────────────────────────────────
     unit:

src/trx-protocol/src/types.rs

@@ -130,6 +130,28 @@ pub enum ClientCommand {
     /// newline-delimited `MeterUpdate` JSON frames and no further commands or
     /// regular responses are sent.  Intended for a dedicated TCP connection.
     SubscribeMeter,
+    /// Subscribe to a per-rig spectrum stream on this connection.  Like
+    /// `SubscribeMeter`, the connection becomes a one-way flow of
+    /// newline-delimited `SpectrumFrame` JSON and no further commands or
+    /// regular responses are sent.
+    ///
+    /// Polling `GetSpectrum` costs a round trip per frame, which caps the frame
+    /// rate at 1/RTT no matter how often the client asks; the server pushes at
+    /// its own cadence instead.  Clients fall back to polling when the server
+    /// rejects this command.
+    SubscribeSpectrum,
+}
+
+/// One spectrum frame pushed by the server on a dedicated spectrum stream.
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
+pub struct SpectrumFrame {
+    /// Rig identifier this frame belongs to.
+    pub rig_id: String,
+    /// The frame itself; bins travel base64-encoded (see `spectrum_wire`).
+    pub spectrum: trx_core::rig::state::SpectrumData,
+    /// Virtual-channel RDS state, mirroring what `GetSpectrum` returned.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub vchan_rds: Option<Vec<trx_core::rig::state::VchanRdsEntry>>,
 }
 
 /// Fast meter sample pushed by the server on a dedicated meter stream.

src/trx-server/src/listener.rs

@@ -494,6 +494,58 @@ where
             }
         };
 
+        // SubscribeSpectrum: turns this connection into a one-way spectrum
+        // stream.  Polling GetSpectrum costs a round trip per frame, so a
+        // client on a slow link could never reach the frame rate it asked for;
+        // pushing decouples the rate from the latency.
+        if matches!(envelope.cmd, ClientCommand::SubscribeSpectrum) {
+            let mut spectrum_rx = handle.spectrum_tx.subscribe();
+            let io_timeout = timeouts.io_timeout;
+            info!(
+                "Client {} subscribed to spectrum stream for rig '{}'",
+                addr, target_rig_id
+            );
+            loop {
+                tokio::select! {
+                    frame = spectrum_rx.recv() => {
+                        match frame {
+                            Ok(frame) => {
+                                let Ok(mut line) = serde_json::to_string(&frame) else { continue };
+                                line.push('\n');
+                                let write = time::timeout(
+                                    io_timeout,
+                                    writer.write_all(line.as_bytes()),
+                                ).await;
+                                match write {
+                                    Ok(Ok(())) => {}
+                                    Ok(Err(e)) => {
+                                        info!("Client {} spectrum write failed: {}", addr, e);
+                                        break;
+                                    }
+                                    Err(_) => {
+                                        info!("Client {} spectrum write timed out", addr);
+                                        break;
+                                    }
+                                }
+                            }
+                            // A client that cannot keep up skips to the newest
+                            // frame; stale spectrum is not worth drawing.
+                            Err(tokio::sync::broadcast::error::RecvError::Lagged(_)) => continue,
+                            Err(tokio::sync::broadcast::error::RecvError::Closed) => break,
+                        }
+                    }
+                    changed = shutdown_rx.changed() => {
+                        match changed {
+                            Ok(()) if *shutdown_rx.borrow() => break,
+                            Ok(()) => {}
+                            Err(_) => break,
+                        }
+                    }
+                }
+            }
+            break;
+        }
+
         // SubscribeMeter: turns this connection into a one-way meter stream.
         // No regular responses are produced; the connection lives until the
         // client disconnects or shutdown fires.
@@ -732,6 +784,7 @@ mod tests {
         let (state_tx, state_rx) = watch::channel(state);
         let _state_tx = state_tx;
         let (meter_tx, _) = tokio::sync::broadcast::channel(8);
+        let (spectrum_tx, _) = tokio::sync::broadcast::channel(4);
         let handle = RigHandle {
             rig_id: "default".to_string(),
             display_name: "Default Rig".to_string(),
@@ -739,6 +792,7 @@ mod tests {
             state_rx,
             audio_port: 4531,
             meter_tx,
+            spectrum_tx,
         };
         let mut map = HashMap::new();
         map.insert("default".to_string(), handle);
@@ -933,6 +987,7 @@ mod tests {
             state_rx: state_rx_a,
             audio_port: 4531,
             meter_tx: meter_tx_a,
+            spectrum_tx: tokio::sync::broadcast::channel(4).0,
         };
 
         let (tx_b, rx_b) = mpsc::channel::<RigRequest>(8);
@@ -945,6 +1000,7 @@ mod tests {
             state_rx: state_rx_b,
             audio_port: 4532,
             meter_tx: meter_tx_b,
+            spectrum_tx: tokio::sync::broadcast::channel(4).0,
         };
 
         let mut map = HashMap::new();
@@ -953,6 +1009,67 @@ mod tests {
         (Arc::new(map), "rig_hf".to_string(), rx_a, rx_b)
     }
 
+    /// Polling spectrum costs a round trip per frame, so the rate a client can
+    /// reach is capped by latency rather than by what it asked for.  Subscribed
+    /// clients get frames pushed instead; this is that path end to end.
+    #[tokio::test]
+    async fn subscribe_spectrum_pushes_frames() {
+        use trx_core::rig::state::SpectrumData;
+
+        let (rigs, default_id) = make_rigs(sample_state());
+        let spectrum_tx = rigs.get("default").expect("rig").spectrum_tx.clone();
+        let ctx = make_ctx(rigs, default_id, HashSet::new());
+        let (mut reader, mut writer, handle, shutdown_tx) = spawn_client_io(ctx);
+
+        writer
+            .write_all(br#"{"cmd":"subscribe_spectrum"}"#)
+            .await
+            .expect("write");
+        writer.write_all(b"\n").await.expect("newline");
+        writer.flush().await.expect("flush");
+
+        // The subscription is registered asynchronously; publish until it takes.
+        let frame = trx_protocol::SpectrumFrame {
+            rig_id: "default".to_string(),
+            spectrum: SpectrumData {
+                bins: vec![-73.4, -20.6, 0.0],
+                center_hz: 14_200_000,
+                sample_rate: 1_920_000,
+                rds: None,
+            },
+            vchan_rds: None,
+        };
+        let mut line = String::new();
+        for _ in 0..50 {
+            let _ = spectrum_tx.send(frame.clone());
+            tokio::select! {
+                read = reader.read_line(&mut line) => {
+                    if read.expect("read") > 0 && !line.trim().is_empty() {
+                        break;
+                    }
+                    line.clear();
+                }
+                _ = tokio::time::sleep(Duration::from_millis(20)) => {}
+            }
+        }
+
+        let received: trx_protocol::SpectrumFrame =
+            serde_json::from_str(line.trim()).unwrap_or_else(|e| panic!("frame {line:?}: {e}"));
+        assert_eq!(received.rig_id, "default");
+        assert_eq!(received.spectrum.center_hz, 14_200_000);
+        // Bins survive the trip quantized to whole dBFS, which is the
+        // resolution the display draws at anyway.
+        assert_eq!(received.spectrum.bins, vec![-73.0, -21.0, 0.0]);
+        // And they travel as base64 rather than a JSON array of floats.
+        assert!(
+            !line.contains("-73"),
+            "bins should not be spelled out on the wire: {line}"
+        );
+
+        let _ = shutdown_tx.send(true);
+        let _ = handle.await;
+    }
+
     #[tokio::test]
     async fn multi_rig_state_isolation() {
         let state_hf = sample_state_custom("HF-Dummy", 14_200_000, trx_core::RigMode::USB);

src/trx-server/src/main.rs

@@ -360,6 +360,7 @@ fn build_sdr_rig_from_instance(rig_cfg: &RigInstanceConfig) -> SdrRigBuildResult
         max_virtual_channels: rig_cfg.sdr.max_virtual_channels,
         nb_enabled: rig_cfg.sdr.noise_blanker.enabled,
         nb_threshold: rig_cfg.sdr.noise_blanker.threshold,
+        spectrum_fft_size: rig_cfg.sdr.spectrum_fft_size,
     })?;
 
     let pcm_rx = sdr_rig.subscribe_pcm();
@@ -460,6 +461,7 @@ fn build_rig_task_config(
         prebuilt_rig: None,
         command_exec_timeout: Duration::from_millis(timeouts.command_exec_timeout_ms),
         poll_refresh_timeout: Duration::from_millis(timeouts.poll_refresh_timeout_ms),
+        spectrum_interval_ms: rig_cfg.sdr.spectrum_interval_ms,
     }
 }
 
@@ -1215,6 +1217,9 @@ async fn main() -> DynResult<()> {
         let (state_tx, state_rx) = watch::channel(initial_state);
         let (meter_tx, _) =
             broadcast::channel::<trx_protocol::MeterUpdate>(rig_handle::METER_BROADCAST_CAPACITY);
+        let (spectrum_tx, _) = broadcast::channel::<trx_protocol::SpectrumFrame>(
+            rig_handle::SPECTRUM_BROADCAST_CAPACITY,
+        );
 
         let mut task_config = build_rig_task_config(
             rig_cfg,
@@ -1242,12 +1247,14 @@ async fn main() -> DynResult<()> {
         let rig_shutdown_rx = shutdown_rx.clone();
         let rig_id_supervisor = rig_cfg.id.clone();
         let meter_tx_task = meter_tx.clone();
+        let spectrum_tx_task = spectrum_tx.clone();
         task_handles.push(tokio::spawn(async move {
             let result = rig_task::run_rig_task(
                 task_config,
                 rig_rx,
                 state_tx.clone(),
                 meter_tx_task,
+                spectrum_tx_task,
                 rig_shutdown_rx,
             )
             .await;
@@ -1294,6 +1301,7 @@ async fn main() -> DynResult<()> {
         rig_handles.insert(
             rig_cfg.id.clone(),
             RigHandle {
+                spectrum_tx: spectrum_tx.clone(),
                 rig_id: rig_cfg.id.clone(),
                 display_name: rig_cfg.display_name().to_string(),
                 rig_tx,

src/trx-server/src/rig_handle.rs

@@ -8,13 +8,18 @@ use tokio::sync::{broadcast, mpsc, watch};
 
 use trx_core::rig::request::RigRequest;
 use trx_core::rig::state::RigState;
-use trx_protocol::MeterUpdate;
+use trx_protocol::{MeterUpdate, SpectrumFrame};
 
 /// Bounded broadcast capacity for the meter stream.  Keeps ~0.5 s of buffered
 /// samples at 30 Hz — more than enough slack to tolerate a scheduling blip
 /// without forcing the producer to block or drop silently.
 pub const METER_BROADCAST_CAPACITY: usize = 16;
 
+/// Bounded broadcast capacity for the spectrum stream.  Frames are large and
+/// only the newest one is worth drawing, so the buffer stays shallow: a slow
+/// client lags and skips rather than making the server hold stale frames.
+pub const SPECTRUM_BROADCAST_CAPACITY: usize = 4;
+
 /// A handle to a single running rig backend.
 ///
 /// One `RigHandle` is created per rig in `main.rs` and stored in the shared
@@ -34,4 +39,8 @@ pub struct RigHandle {
     /// ~6–7 Hz (CAT).  Consumed by `SubscribeMeter` clients; independent of
     /// the slower `state_rx` snapshot path.
     pub meter_tx: broadcast::Sender<MeterUpdate>,
+    /// Per-rig spectrum frames published by `rig_task` while at least one
+    /// client is subscribed.  Consumed by `SubscribeSpectrum` clients; the
+    /// producer skips the work entirely when nobody is listening.
+    pub spectrum_tx: broadcast::Sender<SpectrumFrame>,
 }

src/trx-server/src/rig_task.rs

@@ -23,7 +23,7 @@ use trx_core::rig::request::RigRequest;
 use trx_core::rig::state::{RigMode, RigSnapshot, RigState};
 use trx_core::rig::{RigCat, RigRxStatus, RigTxStatus};
 use trx_core::{DynResult, RigError, RigResult};
-use trx_protocol::MeterUpdate;
+use trx_protocol::{MeterUpdate, SpectrumFrame};
 
 use crate::audio::DecoderHistories;
 use crate::error::is_invalid_bcd_error;
@@ -64,6 +64,8 @@ pub struct RigTaskConfig {
     pub command_exec_timeout: Duration,
     /// Maximum time for a CAT poll refresh cycle.
     pub poll_refresh_timeout: Duration,
+    /// How often to push a spectrum frame to subscribed clients, in ms.
+    pub spectrum_interval_ms: u64,
 }
 
 impl Default for RigTaskConfig {
@@ -94,6 +96,7 @@ impl Default for RigTaskConfig {
             prebuilt_rig: None,
             command_exec_timeout: DEFAULT_COMMAND_EXEC_TIMEOUT,
             poll_refresh_timeout: DEFAULT_POLL_REFRESH_TIMEOUT,
+            spectrum_interval_ms: 50,
         }
     }
 }
@@ -115,6 +118,7 @@ pub async fn run_rig_task(
     mut rx: mpsc::Receiver<RigRequest>,
     state_tx: watch::Sender<RigState>,
     meter_tx: broadcast::Sender<MeterUpdate>,
+    spectrum_tx: broadcast::Sender<SpectrumFrame>,
     mut shutdown_rx: watch::Receiver<bool>,
 ) -> DynResult<()> {
     let histories = config.histories.clone();
@@ -273,6 +277,13 @@ pub async fn run_rig_task(
     } else {
         Duration::from_millis(150)
     };
+    // Spectrum frames get their own tick so a subscribed client never pays a
+    // round trip per frame.  The FFT is computed by the SDR thread either way;
+    // this only reads the latest result, and only while somebody is subscribed.
+    let spectrum_tick_duration = Duration::from_millis(config.spectrum_interval_ms.max(1));
+    let mut spectrum_tick: std::pin::Pin<Box<tokio::time::Sleep>> =
+        Box::pin(tokio::time::sleep(spectrum_tick_duration));
+
     let meter_task_start = Instant::now();
     let meter_state_delta_db: f64 = 0.25;
     let rig_id = config.rig_id.clone();
@@ -302,6 +313,21 @@ pub async fn run_rig_task(
                     Err(_) => break,
                 }
             }
+            // Push the latest spectrum frame to subscribed clients.
+            _ = &mut spectrum_tick => {
+                spectrum_tick = Box::pin(tokio::time::sleep(spectrum_tick_duration));
+                // `send` fails only when nobody is listening, but building the
+                // frame clones a few KB of bins, so check before doing the work.
+                if spectrum_tx.receiver_count() > 0 {
+                    if let Some(spectrum) = rig.as_sdr_ref().and_then(|s| s.get_spectrum()) {
+                        let _ = spectrum_tx.send(SpectrumFrame {
+                            rig_id: rig_id.clone(),
+                            spectrum,
+                            vchan_rds: rig.as_sdr_ref().and_then(|s| s.get_vchan_rds()),
+                        });
+                    }
+                }
+            }
             // Fast meter-only refresh between full polls.
             _ = &mut meter_tick => {
                 meter_tick = Box::pin(tokio::time::sleep(meter_tick_duration));

src/trx-server/trx-backend/trx-backend-soapysdr/src/dsp.rs

@@ -154,6 +154,7 @@ impl SdrPipeline {
         squelch_cfg: VirtualSquelchConfig,
         nb_cfg: NoiseBlankerConfig,
         channels: &[(f64, RigMode, u32)],
+        spectrum_fft_size: usize,
     ) -> Self {
         const IQ_BROADCAST_CAPACITY: usize = 64;
         let (iq_tx, _iq_rx) = broadcast::channel::<Vec<Complex<f32>>>(IQ_BROADCAST_CAPACITY);
@@ -219,6 +220,7 @@ impl SdrPipeline {
             .name("sdr-iq-read".to_string())
             .spawn(move || {
                 iq_read_loop(
+                    spectrum_fft_size,
                     source,
                     sdr_sample_rate,
                     thread_dsps,
@@ -317,6 +319,7 @@ pub const IQ_BLOCK_SIZE: usize = 4096;
 
 #[allow(clippy::too_many_arguments)]
 fn iq_read_loop(
+    spectrum_fft_size: usize,
     mut source: Box<dyn IqSource>,
     sdr_sample_rate: u32,
     channel_dsps: Arc<RwLock<Vec<Arc<Mutex<ChannelDsp>>>>>,
@@ -335,7 +338,7 @@ fn iq_read_loop(
     };
     let throttle = !source.is_blocking();
 
-    let mut spectrum = SpectrumSnapshotter::new();
+    let mut spectrum = SpectrumSnapshotter::new(spectrum_fft_size);
     let mut read_error_streak: u32 = 0;
     let mut zero_read_streak: u32 = 0;
     let mut overflow_log_window_start: Option<Instant> = None;
@@ -572,6 +575,7 @@ mod tests {
             VirtualSquelchConfig::default(),
             NoiseBlankerConfig::default(),
             &[(200_000.0, RigMode::USB, 3000)],
+            1024,
         );
         assert_eq!(pipeline.pcm_senders.len(), 1);
         assert_eq!(pipeline.channel_dsps.read().unwrap().len(), 1);
@@ -590,6 +594,7 @@ mod tests {
             VirtualSquelchConfig::default(),
             NoiseBlankerConfig::default(),
             &[],
+            1024,
         );
         assert_eq!(pipeline.pcm_senders.len(), 0);
         assert_eq!(pipeline.channel_dsps.read().unwrap().len(), 0);

src/trx-server/trx-backend/trx-backend-soapysdr/src/dsp/spectrum.rs

@@ -9,28 +9,36 @@ use num_complex::Complex;
 use rustfft::num_complex::Complex as FftComplex;
 use rustfft::FftPlanner;
 
-/// Number of FFT bins for the spectrum display.
+/// Default number of FFT bins for the spectrum display, used when the config
-pub(super) const SPECTRUM_FFT_SIZE: usize = 1024;
+/// does not say otherwise.
+pub(super) const DEFAULT_SPECTRUM_FFT_SIZE: usize = 1024;
 
 /// Update the spectrum buffer every this many IQ blocks (~10 Hz at 1.92 MHz / 4096 block).
 pub(super) const SPECTRUM_UPDATE_BLOCKS: usize = 4;
 
 pub(super) struct SpectrumSnapshotter {
+    fft_size: usize,
     hann_window: Vec<f32>,
     fft: std::sync::Arc<dyn rustfft::Fft<f32>>,
     counter: usize,
 }
 
 impl SpectrumSnapshotter {
-    pub(super) fn new() -> Self {
+    pub(super) fn new(fft_size: usize) -> Self {
-        let hann_window: Vec<f32> = (0..SPECTRUM_FFT_SIZE)
+        let fft_size = if fft_size >= 2 {
-            .map(|i| 0.5 * (1.0 - (2.0 * PI * i as f32 / (SPECTRUM_FFT_SIZE - 1) as f32).cos()))
+            fft_size
+        } else {
+            DEFAULT_SPECTRUM_FFT_SIZE
+        };
+        let hann_window: Vec<f32> = (0..fft_size)
+            .map(|i| 0.5 * (1.0 - (2.0 * PI * i as f32 / (fft_size - 1) as f32).cos()))
             .collect();
 
         let mut planner = FftPlanner::<f32>::new();
-        let fft = planner.plan_fft_forward(SPECTRUM_FFT_SIZE);
+        let fft = planner.plan_fft_forward(fft_size);
 
         Self {
+            fft_size,
             hann_window,
             fft,
             counter: 0,
@@ -48,7 +56,7 @@ impl SpectrumSnapshotter {
         }
         self.counter = 0;
 
-        let take = samples.len().min(SPECTRUM_FFT_SIZE);
+        let take = samples.len().min(self.fft_size);
         let mut buf: Vec<FftComplex<f32>> = samples[..take]
             .iter()
             .enumerate()
@@ -59,16 +67,15 @@ impl SpectrumSnapshotter {
                 )
             })
             .collect();
-        buf.resize(SPECTRUM_FFT_SIZE, FftComplex::new(0.0, 0.0));
+        buf.resize(self.fft_size, FftComplex::new(0.0, 0.0));
         self.fft.process(&mut buf);
 
-        let half = SPECTRUM_FFT_SIZE / 2;
+        let half = self.fft_size / 2;
         let bins: Vec<f32> = buf[half..]
             .iter()
             .chain(buf[..half].iter())
             .map(|value| {
-                let mag =
+                let mag = (value.re * value.re + value.im * value.im).sqrt() / self.fft_size as f32;
-                    (value.re * value.re + value.im * value.im).sqrt() / SPECTRUM_FFT_SIZE as f32;
                 20.0 * mag.max(1e-10_f32).log10()
             })
             .collect();

src/trx-server/trx-backend/trx-backend-soapysdr/src/lib.rs

@@ -73,6 +73,11 @@ pub struct SoapySdrConfig {
     pub nb_enabled: bool,
     /// Noise blanker impulse threshold multiplier.
     pub nb_threshold: f64,
+    /// FFT bin count for the spectrum display; a power of two.
+    ///
+    /// Fewer bins cost less DSP and put fewer bytes on the network per frame,
+    /// which is what a slow server↔client link cares about.
+    pub spectrum_fft_size: usize,
 }
 
 impl Default for SoapySdrConfig {
@@ -99,6 +104,7 @@ impl Default for SoapySdrConfig {
             max_virtual_channels: 4,
             nb_enabled: false,
             nb_threshold: 10.0,
+            spectrum_fft_size: 1024,
         }
     }
 }
@@ -194,6 +200,7 @@ impl SoapySdrRig {
         let max_virtual_channels = config.max_virtual_channels;
         let nb_enabled = config.nb_enabled;
         let nb_threshold = config.nb_threshold;
+        let spectrum_fft_size = config.spectrum_fft_size;
         tracing::info!(
             "initialising SoapySDR backend (args={:?}, gain_mode={:?}, gain_db={}, max_gain_db={:?})",
             args,
@@ -293,6 +300,7 @@ impl SoapySdrRig {
                 threshold: nb_threshold as f32,
             },
             &all_channels,
+            spectrum_fft_size,
         ));
 
         let info = RigInfo {
@@ -418,6 +426,7 @@ impl SoapySdrRig {
         nb_threshold: f64,
     ) -> DynResult<Self> {
         Self::new_from_config(SoapySdrConfig {
+            spectrum_fft_size: 1024,
             args: args.to_string(),
             channels: channels.to_vec(),
             gain_mode: gain_mode.to_string(),

src/trx-server/trx-backend/trx-backend-soapysdr/src/vchan_impl.rs

@@ -439,6 +439,7 @@ mod tests {
             VirtualSquelchConfig::default(),
             NoiseBlankerConfig::default(),
             &[(0.0, RigMode::USB, 3_000)],
+            1024,
         ))
     }
 

trx-rs.toml.example

@@ -120,6 +120,8 @@ wfm_deemphasis_us = 50
 center_offset_hz = 100000
 channels = []
 max_virtual_channels = 4
+spectrum_fft_size = 1024
+spectrum_interval_ms = 50
 
 # "auto" for hardware AGC, or "manual".
 [trx-server.sdr.gain]
@@ -160,6 +162,7 @@ log_level = "info"
 # Legacy single-remote form; prefer [[remotes]] below.
 [trx-client.remote]
 poll_interval_ms = 750
+spectrum_interval_ms = 50
 
 [trx-client.remote.auth]
 
@@ -168,6 +171,7 @@ name = "home-hf"
 url = "192.168.1.100:4530"
 rig_id = "hf"
 poll_interval_ms = 750
+spectrum_interval_ms = 50
 
 [trx-client.remotes.auth]
 token = "my-token"
@@ -177,6 +181,7 @@ name = "home-vhf"
 url = "192.168.1.100:4530"
 rig_id = "vhf"
 poll_interval_ms = 750
+spectrum_interval_ms = 50
 
 [trx-client.remotes.auth]
 token = "my-token"