[fix](trx-frontend-http): route feature bundles through the host contract

The bookmark fix addressed one instance of a defect the TypeScript
migration left across the feature entries.  app.js stopped being a
classic script, so its top-level declarations are no longer shared
globals, but the converted entries kept reading them as window
properties that nothing publishes.

Restore the broken behavior:

- ais, aprs, hf-aprs read serverLat, serverLon and haversineKm as
  undefined, so every positioned packet rendered an empty distance.
- ais, aprs, hf-aprs, cw, sat, vdes, wefax, wspr called an undefined
  postPath, so clear-history and decoder toggles threw.
- scheduler read authRole as undefined, so the lazy-load path never
  self-initialized and the Settings tab opened an inert scheduler.
- background-decode read authEnabled as undefined, so control gating
  fell back to role-only.
- vchan read fifteen application values and services as undefined:
  mode and bandwidth sync, the out-of-band hint, RX audio restart, and
  the frequency field all silently no-opped on a virtual channel.
- vchan wrapped window.refreshFreqDisplay, capturing an undefined
  original exactly as it did for setRigFrequency, so leaving a channel
  never restored the application's own frequency display.
- _audioChannelOverride was a const that nothing could assign, so RX
  audio always subscribed to the primary channel.
- ftx-family read fmtTime, a helper legacy ft8.js owned locally, so
  decode bar timestamps rendered empty.

Declare the contract once in plugins/host.ts and import it from the
feature entries, rather than restoring globals that
docs/frontend-architecture.md excludes.  trx.state gains jogUnit,
rxActive and audioChannelOverride, and makes lastModeName writable;
trx.core gains the tuning, RDS, WFM, jog and RX audio services the
entries need.  vchan interception moves to an interceptFreqDisplay
service method that refreshFreqDisplay calls, matching the frequency,
mode and bandwidth interception it already registers.

Reading registry-built elements through a strict lookup is the same
defect as in bookmarks: renderTimelineNeedle guards its result, but
schedulerEl throws, so the now-initializing scheduler crashed on the
timeline needle group that its own SVG creates.

Feature tests move onto a shared host fixture, and entries that now
import a common module are bundled through bundleEntry like the other
shared-module entries.  Covers scheduler self-initialization and the
distance path that the bare window reads broke.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GdyUjuXejCEfiub675z6cz
Signed-off-by: Stan Grams <sjg@haxx.space>

docs/frontend-architecture.md

@@ -39,6 +39,15 @@ entry, so they use three intentional host namespaces:
 | `window.trxPluginRuntime` | Typed decoder registration and message dispatch | Runtime object is installed once; plugins register lifecycle handlers through its API. |
 | `window.trxUi` | Notifications, confirmations, tab accessibility, and control presentation | Installed once by `ui-core.ts`; consumers call methods but do not replace them. |
 
+`frontend/src/plugins/host.ts` declares the typed view of `window.trx.state`
+and `window.trx.core` that feature bundles consume. Feature entries import it
+instead of re-deriving the contract, so a service that moves out of the
+application entry is added in one place. Application state that a feature needs
+belongs in `trx.state`, and shared behavior belongs in `trx.core`; a feature
+that has to intercept application behavior registers a `modules.*` method the
+application calls, as the virtual-channel entry does for tuning, mode,
+bandwidth, and frequency display.
+
 The WebGL adapter exposes `createTrxWebGlRenderer`, `trxParseCssColor`,
 `trxHslToRgba`, and `trxClearCssColorCache` for the application bundle. Leaflet
 adds `L.TrxAisTrackSymbol` and `L.trxAisTrackSymbol` to the vendored Leaflet

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

@@ -1,6 +1,11 @@
+import {
+  hostCore,
+  hostState
+} from "./chunk-KL66PICH.js";
+
 // src/plugins/ais.ts
 var aisWindow = window;
-var escapeAisHtml = (input) => aisWindow.escapeMapHtml?.(input) ?? input.replaceAll("&", "&amp;").replaceAll("<", "&lt;").replaceAll(">", "&gt;").replaceAll('"', "&quot;");
+var escapeAisHtml = (input) => hostCore.escapeMapHtml(input);
 var aisStatus = document.getElementById("ais-status");
 var aisMessagesEl = document.getElementById("ais-messages");
 var aisFilterInput = document.getElementById("ais-filter");
@@ -119,10 +124,10 @@ function aisRouteText(msg) {
   return [msg.callsign, msg.destination].filter(Boolean).join(" -> ");
 }
 function aisDistanceText(msg) {
-  if (aisWindow.serverLat == null || aisWindow.serverLon == null || msg.lat == null || msg.lon == null || !aisWindow.haversineKm) {
+  if (hostState.serverLat == null || hostState.serverLon == null || msg.lat == null || msg.lon == null) {
     return "";
   }
-  const distKm = aisWindow.haversineKm(aisWindow.serverLat, aisWindow.serverLon, msg.lat, msg.lon);
+  const distKm = hostCore.haversineKm(hostState.serverLat, hostState.serverLon, msg.lat, msg.lon);
   if (!Number.isFinite(distKm)) return "";
   if (distKm < 1) return `${Math.round(distKm * 1e3)} m from TRX`;
   return `${distKm.toFixed(1)} km from TRX`;
@@ -303,7 +308,7 @@ document.getElementById("settings-clear-ais-history")?.addEventListener("click",
   void (async () => {
     if (!await aisWindow.trxUi.confirm({ title: "Clear AIS history?", message: "All stored AIS messages will be permanently removed.", confirmLabel: "Clear history" })) return;
     try {
-      await aisWindow.postPath?.("/clear_ais_decode");
+      await hostCore.postPath("/clear_ais_decode");
       resetAisHistoryView();
     } catch (e) {
       console.error("AIS history clear failed", e);

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

@@ -3206,6 +3206,7 @@ function refreshWavelengthDisplay(hz) {
   wavelengthEl.textContent = formatWavelength(hz);
 }
 function refreshFreqDisplay() {
+  if (window.trx?.modules.vchan?.interceptFreqDisplay()) return;
   if (lastFreqHz == null || freqDirty) return;
   freqEl.value = formatFrequencyForStep(lastFreqHz, jogUnit);
   refreshWavelengthDisplay(lastFreqHz);
@@ -5775,6 +5776,19 @@ Object.defineProperties(trxState, {
   } },
   lastModeName: { get() {
     return lastModeName;
+  }, set(v) {
+    lastModeName = v;
+  } },
+  jogUnit: { get() {
+    return jogUnit;
+  } },
+  rxActive: { get() {
+    return rxActive;
+  } },
+  audioChannelOverride: { get() {
+    return _audioChannelOverride;
+  }, set(v) {
+    _audioChannelOverride = v;
   } },
   lastSpectrumData: { get() {
     return lastSpectrumData;
@@ -5832,6 +5846,16 @@ var trxCore = Object.freeze({
   syncBandwidthInput,
   scheduleSpectrumDraw,
   onDecoderRegistryReady,
+  formatFreqForStep: formatFrequencyForStep,
+  refreshFreqDisplay,
+  setJogDivisor,
+  mwDefaultsForMode,
+  resetRdsDisplay,
+  positionRdsPsOverlay,
+  updateWfmControls,
+  updateSdrSquelchControlVisibility,
+  startRxAudio,
+  stopRxAudio,
   latLonToMaidenhead,
   locatorToLatLon,
   haversineKm,

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

@@ -8,12 +8,16 @@ import {
   renderAprsInfo,
   renderLocalAprsSymbol
 } from "./chunk-M2I6DH4X.js";
+import {
+  hostCore,
+  hostState
+} from "./chunk-KL66PICH.js";
 
 // src/plugins/aprs.ts
 var aprsWindow = window;
-var escapeAprsHtml = (input) => aprsWindow.escapeMapHtml?.(input) ?? input.replaceAll("&", "&amp;").replaceAll("<", "&lt;").replaceAll(">", "&gt;").replaceAll('"', "&quot;");
+var escapeAprsHtml = (input) => hostCore.escapeMapHtml(input);
 var showAprsHint = (message, durationMs) => {
-  aprsWindow.showHint?.(message, durationMs);
+  hostCore.showHint(message, durationMs);
 };
 var aprsStatus = document.getElementById("aprs-status");
 var aprsPacketsEl = document.getElementById("aprs-packets");
@@ -58,8 +62,8 @@ function scheduleAprsBarUpdate() {
   });
 }
 function aprsDistanceText(pkt) {
-  if (aprsWindow.serverLat == null || aprsWindow.serverLon == null || pkt.lat == null || pkt.lon == null || !aprsWindow.haversineKm) return "";
-  const distKm = aprsWindow.haversineKm(aprsWindow.serverLat, aprsWindow.serverLon, pkt.lat, pkt.lon);
+  if (hostState.serverLat == null || hostState.serverLon == null || pkt.lat == null || pkt.lon == null) return "";
+  const distKm = hostCore.haversineKm(hostState.serverLat, hostState.serverLon, pkt.lat, pkt.lon);
   if (!Number.isFinite(distKm)) return "";
   if (distKm < 1) return `${Math.round(distKm * 1e3)} m from TRX`;
   return `${distKm.toFixed(1)} km from TRX`;
@@ -260,7 +264,7 @@ document.getElementById("settings-clear-aprs-history")?.addEventListener("click"
   void (async () => {
     if (!await aprsWindow.trxUi.confirm({ title: "Clear APRS history?", message: "All stored APRS packets will be permanently removed.", confirmLabel: "Clear history" })) return;
     try {
-      await aprsWindow.postPath?.("/clear_aprs_decode");
+      await hostCore.postPath("/clear_aprs_decode");
       resetAprsHistoryView();
     } catch (e) {
       console.error("APRS history clear failed", e);

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

@@ -1,3 +1,7 @@
+import {
+  hostState
+} from "./chunk-KL66PICH.js";
+
 // src/plugins/background-decode.ts
 var bgdWindow = window;
 (function() {
@@ -104,7 +108,7 @@ var bgdWindow = window;
     }
     setCheckbox("background-decode-enabled", currentConfig.enabled);
     renderBookmarkChecklist();
-    const isControl = backgroundDecodeRole === "control" || bgdWindow.authEnabled === false;
+    const isControl = backgroundDecodeRole === "control" || hostState.authEnabled === false;
     const panel = document.getElementById("background-decode-panel");
     if (panel) {
       panel.querySelectorAll("input, select, button.sch-write").forEach(function(el) {

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

@@ -1,7 +1,10 @@
+import {
+  hostCore,
+  hostState
+} from "./chunk-KL66PICH.js";
+
 // src/plugins/bookmarks.ts
 var bridge = window;
-var trxState = bridge.trx.state;
-var trxCore = bridge.trx.core;
 function bmEl(id) {
   const element = document.getElementById(id);
   if (!element) throw new Error(`Missing bookmark element #${id}`);
@@ -39,7 +42,7 @@ function bmEsc(str) {
   return d.innerHTML;
 }
 function bmCanControl() {
-  return !trxState.authEnabled || trxState.authRole === "control";
+  return !hostState.authEnabled || hostState.authRole === "control";
 }
 function bmSyncAccess() {
   const canCtrl = bmCanControl();
@@ -49,7 +52,7 @@ function bmSyncAccess() {
   if (selectAllBtn) selectAllBtn.style.display = canCtrl ? "" : "none";
 }
 function bmListScope() {
-  return trxState.lastActiveRigId || "general";
+  return hostState.lastActiveRigId || "general";
 }
 async function bmFetchOverlay() {
   const overlayScope = bmListScope();
@@ -65,7 +68,7 @@ async function bmFetchOverlay() {
   if (typeof bridge.syncBookmarkMapLocators === "function") {
     bridge.syncBookmarkMapLocators(bmOverlayList);
   }
-  trxCore.scheduleSpectrumDraw();
+  hostCore.scheduleSpectrumDraw();
 }
 async function bmFetch(categoryFilter) {
   let url = "/bookmarks";
@@ -188,11 +191,11 @@ function bmChangePage(delta) {
   bmRender(bmFilteredList);
 }
 function bmReadDecoders() {
-  return trxState.decoderRegistry.filter((d) => d.bookmark_selectable).filter((d) => bmOptionalEl("bm-dec-" + d.id)?.checked).map((d) => d.id);
+  return hostState.decoderRegistry.filter((d) => d.bookmark_selectable).filter((d) => bmOptionalEl("bm-dec-" + d.id)?.checked).map((d) => d.id);
 }
 function bmWriteDecoders(decoders) {
   const set = new Set(decoders || []);
-  trxState.decoderRegistry.filter((d) => d.bookmark_selectable).forEach((d) => {
+  hostState.decoderRegistry.filter((d) => d.bookmark_selectable).forEach((d) => {
     const el = bmOptionalEl("bm-dec-" + d.id);
     if (el) el.checked = set.has(d.id);
   });
@@ -201,7 +204,7 @@ function bmBuildDecoderCheckboxes() {
   const container = bmEl("bm-decoder-checkboxes");
   if (!container) return;
   container.innerHTML = "";
-  trxState.decoderRegistry.filter((d) => d.bookmark_selectable).forEach((d) => {
+  hostState.decoderRegistry.filter((d) => d.bookmark_selectable).forEach((d) => {
     const label = document.createElement("label");
     label.className = "bm-decoder-check";
     label.innerHTML = '<input type="checkbox" id="bm-dec-' + d.id + '" value="' + d.id + '" /> ' + d.label;
@@ -231,17 +234,17 @@ function bmCloseForm() {
   if (wrap) wrap.style.display = "none";
 }
 function bmPrefillFromStatus() {
-  const freqHz = trxState.lastFreqHz;
+  const freqHz = hostState.lastFreqHz;
   if (freqHz != null && Number.isFinite(freqHz)) {
     bmEl("bm-freq").value = String(Math.round(freqHz));
   }
-  if (trxState.lastModeName) {
-    bmEl("bm-mode").value = trxState.lastModeName;
+  if (hostState.lastModeName) {
+    bmEl("bm-mode").value = hostState.lastModeName;
   }
-  if (trxState.currentBandwidthHz > 0) {
-    bmEl("bm-bw").value = String(Math.round(trxState.currentBandwidthHz));
+  if (hostState.currentBandwidthHz > 0) {
+    bmEl("bm-bw").value = String(Math.round(hostState.currentBandwidthHz));
   }
-  const activeDecoders = trxState.decoderRegistry.filter((d) => d.bookmark_selectable && d.activation === "toggle").filter((d) => bmOptionalEl(d.id + "-decode-toggle-btn")?.dataset.enabled === "true").map((d) => d.id);
+  const activeDecoders = hostState.decoderRegistry.filter((d) => d.bookmark_selectable && d.activation === "toggle").filter((d) => bmOptionalEl(d.id + "-decode-toggle-btn")?.dataset.enabled === "true").map((d) => d.id);
   bmWriteDecoders(activeDecoders);
 }
 async function bmSave(e) {
@@ -327,36 +330,36 @@ function bmApply(bm) {
       modeEl.value = (bm.mode || "").toUpperCase();
     }
     if (bm.bandwidth_hz) {
-      trxState.currentBandwidthHz = bm.bandwidth_hz;
-      trxCore.syncBandwidthInput(bm.bandwidth_hz);
+      hostState.currentBandwidthHz = bm.bandwidth_hz;
+      hostCore.syncBandwidthInput(bm.bandwidth_hz);
     }
-    trxCore.armOptimisticFrequency(bm.freq_hz);
-    trxCore.applyLocalTunedFrequency(bm.freq_hz, true);
-    if (trxState.lastSpectrumData) {
-      trxCore.scheduleSpectrumDraw();
+    hostCore.armOptimisticFrequency(bm.freq_hz);
+    hostCore.applyLocalTunedFrequency(bm.freq_hz, true);
+    if (hostState.lastSpectrumData) {
+      hostCore.scheduleSpectrumDraw();
     }
     const tunePromise = (async () => {
       await bridge.trx.modules.vchan?.takeSchedulerControl();
       const onVirtual = await bridge.trx.modules.vchan?.interceptMode(bm.mode) ?? false;
       if (!onVirtual) {
-        await trxCore.postPath("/set_mode?mode=" + encodeURIComponent(bm.mode));
+        await hostCore.postPath("/set_mode?mode=" + encodeURIComponent(bm.mode));
       }
       if (bm.bandwidth_hz) {
         const bwHandledByVchan = await bridge.trx.modules.vchan?.interceptBandwidth(bm.bandwidth_hz) ?? false;
         if (!bwHandledByVchan) {
-          await trxCore.postPath(`/set_bandwidth?hz=${bm.bandwidth_hz}`);
+          await hostCore.postPath(`/set_bandwidth?hz=${bm.bandwidth_hz}`);
         }
       }
-      trxCore.setRigFrequency(bm.freq_hz);
+      hostCore.setRigFrequency(bm.freq_hz);
     })();
     const hasDecoders = Array.isArray(bm.decoders) && bm.decoders.length > 0;
     const modeUp = (bm.mode || "").toUpperCase();
-    const allToggleDecoders = trxState.decoderRegistry.filter(
+    const allToggleDecoders = hostState.decoderRegistry.filter(
       (d) => d.activation === "toggle"
     );
     const decoderPromise = allToggleDecoders.length ? (async () => {
       let statusUrl = "/status";
-      const rigId = trxState.lastActiveRigId;
+      const rigId = hostState.lastActiveRigId;
       if (rigId) {
         statusUrl += "?remote=" + encodeURIComponent(rigId);
       }
@@ -377,7 +380,7 @@ function bmApply(bm) {
           wanted = currentlyOn;
         }
         if (wanted !== currentlyOn) {
-          toggles.push(trxCore.postPath("/toggle_" + d.id.replace(/-/g, "_") + "_decode"));
+          toggles.push(hostCore.postPath("/toggle_" + d.id.replace(/-/g, "_") + "_decode"));
         }
       }
       if (toggles.length) await Promise.all(toggles);
@@ -427,8 +430,8 @@ function bmUpdateSelectionUi() {
 function bmPopulateMoveTarget() {
   const sel = bmEl("bm-move-target");
   if (!sel) return;
-  const rigIds = trxState.lastRigIds;
-  const displayNames = trxState.lastRigDisplayNames;
+  const rigIds = hostState.lastRigIds;
+  const displayNames = hostState.lastRigDisplayNames;
   const prev = sel.value;
   sel.innerHTML = "";
   if (bmScope !== "general") {
@@ -533,8 +536,8 @@ async function bmDeleteSelected() {
 function bmPopulateScopePicker() {
   const picker = bmEl("bm-scope-picker");
   if (!picker) return;
-  const rigIds = trxState.lastRigIds;
-  const displayNames = trxState.lastRigDisplayNames;
+  const rigIds = hostState.lastRigIds;
+  const displayNames = hostState.lastRigDisplayNames;
   const prev = picker.value;
   while (picker.options.length > 1) picker.remove(1);
   rigIds.forEach((id) => {
@@ -553,7 +556,7 @@ function bmPopulateScopePicker() {
 (function initBookmarks() {
   bmSyncAccess();
   bmBuildDecoderCheckboxes();
-  trxCore.onDecoderRegistryReady(bmBuildDecoderCheckboxes);
+  hostCore.onDecoderRegistryReady(bmBuildDecoderCheckboxes);
   bmPopulateScopePicker();
   const scopePicker = bmEl("bm-scope-picker");
   if (scopePicker) {

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/chunk-KL66PICH.js

@@ -0,0 +1,9 @@
+// src/plugins/host.ts
+var host = window;
+var hostState = host.trx.state;
+var hostCore = host.trx.core;
+
+export {
+  hostState,
+  hostCore
+};

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/chunk-O2Y7YEVQ.js

@@ -1,5 +1,13 @@
+import {
+  hostCore
+} from "./chunk-KL66PICH.js";
+
 // src/plugins/ftx-family.ts
 var bridge = window;
+function formatBarTime(timestampMs) {
+  if (!timestampMs) return "--:--:--";
+  return new Date(timestampMs).toLocaleTimeString([], { hour: "2-digit", minute: "2-digit", second: "2-digit" });
+}
 function finiteNumber(value) {
   const number = typeof value === "number" ? value : Number(value);
   return Number.isFinite(number) ? number : null;
@@ -198,7 +206,7 @@ function initializeFtxDecoder(config) {
     let html = "";
     for (const message of recent) {
       const timestamp = finiteNumber(message._tsMs ?? message.ts_ms);
-      const time = timestamp === null ? "" : `<span class="aprs-bar-time">${bridge.fmtTime?.(timestamp) ?? ""}</span>`;
+      const time = timestamp === null ? "" : `<span class="aprs-bar-time">${formatBarTime(timestamp)}</span>`;
       const snr = finiteNumber(message.snr_db);
       const delta = finiteNumber(message.dt_s);
       const frequency = displayFrequency(message.freq_hz);
@@ -243,7 +251,7 @@ function initializeFtxDecoder(config) {
     void (async () => {
       try {
         await bridge.takeSchedulerControlForDecoderDisable?.(toggle);
-        await bridge.postPath?.(`/toggle_${id}_decode`);
+        await hostCore.postPath(`/toggle_${id}_decode`);
       } catch (error) {
         console.error(`${label} toggle failed`, error);
       }
@@ -253,7 +261,7 @@ function initializeFtxDecoder(config) {
     void (async () => {
       if (!await bridge.trxUi.confirm({ title: `Clear ${label} history?`, message: `All stored ${label} decodes will be permanently removed.`, confirmLabel: "Clear history" })) return;
       try {
-        await bridge.postPath?.(`/clear_${id}_decode`);
+        await hostCore.postPath(`/clear_${id}_decode`);
         reset();
       } catch (error) {
         console.error(`${label} history clear failed`, error);

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

@@ -1,3 +1,7 @@
+import {
+  hostCore
+} from "./chunk-KL66PICH.js";
+
 // src/plugins/cw.ts
 var cwWindow = window;
 var cwStatusEl = document.getElementById("cw-status");
@@ -25,7 +29,7 @@ var cwBarCurrentLine = null;
 var cwBarDismissedAtMs = 0;
 var cwAutoLocalOverride = null;
 function escapeCwHtml(input) {
-  return cwWindow.escapeMapHtml?.(input) ?? input.replaceAll("&", "&amp;").replaceAll("<", "&lt;").replaceAll(">", "&gt;").replaceAll('"', "&quot;");
+  return hostCore.escapeMapHtml(input);
 }
 function applyCwAutoUi(enabled) {
   if (cwAutoInput) cwAutoInput.checked = enabled;
@@ -246,7 +250,7 @@ async function setCwTone(tone, { syncInput = true } = {}) {
     cwToneInput.value = String(clamped);
   }
   try {
-    await cwWindow.postPath?.(`/set_cw_tone?tone_hz=${encodeURIComponent(clamped)}`);
+    await hostCore.postPath(`/set_cw_tone?tone_hz=${encodeURIComponent(clamped)}`);
   } catch (e) {
     console.error("CW tone set failed", e);
   }
@@ -259,7 +263,7 @@ if (cwAutoInput) {
       cwAutoLocalOverride = enabled;
       applyCwAutoUi(enabled);
       try {
-        await cwWindow.postPath?.(`/set_cw_auto?enabled=${enabled ? "true" : "false"}`);
+        await hostCore.postPath(`/set_cw_auto?enabled=${enabled ? "true" : "false"}`);
         drawCwTonePicker();
       } catch (error) {
         console.error("CW auto toggle failed", error);
@@ -276,7 +280,7 @@ if (cwWpmInput) {
       const wpm = clampCwWpm(cwWpmInput.value);
       cwWpmInput.value = String(wpm);
       try {
-        await cwWindow.postPath?.(`/set_cw_wpm?wpm=${encodeURIComponent(wpm)}`);
+        await hostCore.postPath(`/set_cw_wpm?wpm=${encodeURIComponent(wpm)}`);
       } catch (error) {
         console.error("CW WPM set failed", error);
       }
@@ -312,7 +316,7 @@ document.getElementById("settings-clear-cw-history")?.addEventListener("click",
   void (async () => {
     if (!await cwWindow.trxUi.confirm({ title: "Clear CW history?", message: "All stored CW decodes will be permanently removed.", confirmLabel: "Clear history" })) return;
     try {
-      await cwWindow.postPath?.("/clear_cw_decode");
+      await hostCore.postPath("/clear_cw_decode");
       resetCwHistoryView();
     } catch (error) {
       console.error("CW history clear failed", error);

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

@@ -1,6 +1,7 @@
 import {
   initializeFtxDecoder
-} from "./chunk-SGMG5LG2.js";
+} from "./chunk-O2Y7YEVQ.js";
+import "./chunk-KL66PICH.js";
 
 // src/plugins/ft2.ts
 initializeFtxDecoder({ id: "ft2", label: "FT2", periodMs: 3750 });

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

@@ -1,6 +1,7 @@
 import {
   initializeFtxDecoder
-} from "./chunk-SGMG5LG2.js";
+} from "./chunk-O2Y7YEVQ.js";
+import "./chunk-KL66PICH.js";
 
 // src/plugins/ft4.ts
 initializeFtxDecoder({ id: "ft4", label: "FT4", periodMs: 7500 });

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

@@ -2,7 +2,8 @@ import {
   initializeFt8FamilyBar,
   initializeFtxDecoder,
   installFtxCompatibilityHelpers
-} from "./chunk-SGMG5LG2.js";
+} from "./chunk-O2Y7YEVQ.js";
+import "./chunk-KL66PICH.js";
 
 // src/plugins/ft8.ts
 installFtxCompatibilityHelpers();

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

@@ -8,10 +8,14 @@ import {
   renderAprsInfo,
   renderLocalAprsSymbol
 } from "./chunk-M2I6DH4X.js";
+import {
+  hostCore,
+  hostState
+} from "./chunk-KL66PICH.js";
 
 // src/plugins/hf-aprs.ts
 var hfAprsWindow = window;
-var escapeHfAprsHtml = (input) => hfAprsWindow.escapeMapHtml?.(input) ?? input.replaceAll("&", "&amp;").replaceAll("<", "&lt;").replaceAll(">", "&gt;").replaceAll('"', "&quot;");
+var escapeHfAprsHtml = (input) => hostCore.escapeMapHtml(input);
 var hfAprsStatus = document.getElementById("hf-aprs-status");
 var hfAprsPacketsEl = document.getElementById("hf-aprs-packets");
 var hfAprsFilterInput = document.getElementById("hf-aprs-filter");
@@ -44,8 +48,8 @@ function scheduleHfAprsHistoryRender() {
   renderHfAprsHistory();
 }
 function hfAprsDistanceText(pkt) {
-  if (hfAprsWindow.serverLat == null || hfAprsWindow.serverLon == null || pkt.lat == null || pkt.lon == null || !hfAprsWindow.haversineKm) return "";
-  const distKm = hfAprsWindow.haversineKm(hfAprsWindow.serverLat, hfAprsWindow.serverLon, pkt.lat, pkt.lon);
+  if (hostState.serverLat == null || hostState.serverLon == null || pkt.lat == null || pkt.lon == null) return "";
+  const distKm = hostCore.haversineKm(hostState.serverLat, hostState.serverLon, pkt.lat, pkt.lon);
   if (!Number.isFinite(distKm)) return "";
   if (distKm < 1) return `${Math.round(distKm * 1e3)} m from TRX`;
   return `${distKm.toFixed(1)} km from TRX`;
@@ -134,10 +138,10 @@ function renderHfAprsRow(pkt, isFresh) {
           const clipboard = Reflect.get(navigator, "clipboard");
           if (clipboard) {
             await clipboard.writeText(raw);
-            hfAprsWindow.showHint?.("Coordinates copied", 1200);
+            hostCore.showHint("Coordinates copied", 1200);
           }
         } catch {
-          hfAprsWindow.showHint?.("Copy failed", 1500);
+          hostCore.showHint("Copy failed", 1500);
         }
       })();
     });
@@ -201,7 +205,7 @@ hfAprsDecodeToggleBtn?.addEventListener("click", () => {
   void (async () => {
     try {
       await hfAprsWindow.takeSchedulerControlForDecoderDisable?.(hfAprsDecodeToggleBtn);
-      await hfAprsWindow.postPath?.("/toggle_hf_aprs_decode");
+      await hostCore.postPath("/toggle_hf_aprs_decode");
     } catch (e) {
       console.error("HF APRS toggle failed", e);
     }
@@ -211,7 +215,7 @@ document.getElementById("settings-clear-hf-aprs-history")?.addEventListener("cli
   void (async () => {
     if (!await hfAprsWindow.trxUi.confirm({ title: "Clear HF APRS history?", message: "All stored HF APRS packets will be permanently removed.", confirmLabel: "Clear history" })) return;
     try {
-      await hfAprsWindow.postPath?.("/clear_hf_aprs_decode");
+      await hostCore.postPath("/clear_hf_aprs_decode");
       resetHfAprsHistoryView();
     } catch (e) {
       console.error("HF APRS history clear failed", e);

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

@@ -1,3 +1,7 @@
+import {
+  hostCore
+} from "./chunk-KL66PICH.js";
+
 // src/plugins/sat.ts
 var satWindow = window;
 var satDom = {
@@ -243,7 +247,7 @@ lrptDecodeToggleBtn?.addEventListener("click", () => {
   void (async () => {
     try {
       await satWindow.takeSchedulerControlForDecoderDisable?.(lrptDecodeToggleBtn);
-      await satWindow.postPath?.("/toggle_lrpt_decode");
+      await hostCore.postPath("/toggle_lrpt_decode");
     } catch (e) {
       console.error("LRPT toggle failed", e);
     }
@@ -264,7 +268,7 @@ document.getElementById("settings-clear-sat-history")?.addEventListener("click",
   void (async () => {
     if (!await satWindow.trxUi.confirm({ title: "Clear satellite history?", message: "All stored satellite decodes will be permanently removed.", confirmLabel: "Clear history" })) return;
     try {
-      await satWindow.postPath?.("/clear_lrpt_decode");
+      await hostCore.postPath("/clear_lrpt_decode");
       resetSatHistoryView();
     } catch (e) {
       console.error("Weather satellite history clear failed", e);

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

@@ -1,3 +1,7 @@
+import {
+  hostState
+} from "./chunk-KL66PICH.js";
+
 // src/plugins/scheduler.ts
 var schedulerWindow = window;
 var wiredElements = /* @__PURE__ */ new WeakSet();
@@ -6,6 +10,9 @@ function schedulerEl(id) {
   if (!element) throw new Error(`Missing scheduler element #${id}`);
   return element;
 }
+function schedulerOptionalEl(id) {
+  return document.getElementById(id);
+}
 (function() {
   "use strict";
   let schedulerRole = null;
@@ -359,8 +366,8 @@ function schedulerEl(id) {
     renderSatelliteSection();
     if (mode === "grayline" && currentConfig && currentConfig.grayline) {
       const gl = currentConfig.grayline;
-      const lat = gl.lat ?? schedulerWindow.serverLat ?? "";
-      const lon = gl.lon ?? schedulerWindow.serverLon ?? "";
+      const lat = gl.lat ?? hostState.serverLat ?? "";
+      const lon = gl.lon ?? hostState.serverLon ?? "";
       setInputValue("scheduler-gl-lat", lat != null ? lat : "");
       setInputValue("scheduler-gl-lon", lon != null ? lon : "");
       const gridEl = schedulerEl("scheduler-gl-grid");
@@ -373,8 +380,8 @@ function schedulerEl(id) {
       renderBookmarkSelect("scheduler-gl-dusk", gl.dusk_bookmark_id);
       renderBookmarkSelect("scheduler-gl-night", gl.night_bookmark_id);
     } else if (mode === "grayline") {
-      const lat = schedulerWindow.serverLat ?? "";
-      const lon = schedulerWindow.serverLon ?? "";
+      const lat = hostState.serverLat ?? "";
+      const lon = hostState.serverLon ?? "";
       setInputValue("scheduler-gl-lat", lat != null ? lat : "");
       setInputValue("scheduler-gl-lon", lon != null ? lon : "");
       const gridEl2 = schedulerEl("scheduler-gl-grid");
@@ -624,7 +631,7 @@ function schedulerEl(id) {
     return '<line class="sch-timeline-needle" x1="' + x.toFixed(1) + '" y1="2" x2="' + x.toFixed(1) + '" y2="38" /><polygon class="sch-timeline-needle-head" points="' + (x - 3).toFixed(1) + ",2 " + (x + 3).toFixed(1) + ",2 " + x.toFixed(1) + ',6" />';
   }
   function renderTimelineNeedle() {
-    const g = schedulerEl("sch-timeline-needle-g");
+    const g = schedulerOptionalEl("sch-timeline-needle-g");
     if (g) g.innerHTML = timelineNeedleSvg();
   }
   function schInlineEdit(tr, entry, idx) {
@@ -1213,8 +1220,8 @@ function schedulerEl(id) {
     markDirty: markSchedulerDirty
   };
   schedulerWindow.trx.modules.scheduler = schedulerService;
-  if (schedulerWindow.authRole != null) {
-    initScheduler(schedulerWindow.lastActiveRigId ?? null, schedulerWindow.authRole);
+  if (hostState.authRole != null) {
+    initScheduler(hostState.lastActiveRigId, hostState.authRole);
     wireSchedulerEvents();
   }
 })();

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

@@ -1,3 +1,8 @@
+import {
+  hostCore,
+  hostState
+} from "./chunk-KL66PICH.js";
+
 // src/plugins/vchan.ts
 var vchanWindow = window;
 var vchanSessionId = null;
@@ -63,7 +68,7 @@ function vchanStartSchedulerReleasePolling() {
 }
 async function vchanToggleSchedulerRelease() {
   if (!vchanSessionId) return;
-  const rigId = vchanRigId || vchanWindow.lastActiveRigId || null;
+  const rigId = vchanRigId || hostState.lastActiveRigId || null;
   try {
     const resp = await fetch("/scheduler-control", {
       method: "PUT",
@@ -161,14 +166,12 @@ function vchanRender() {
   });
   picker.appendChild(addBtn);
   vchanSyncAccentUI();
-  if (vchanWindow.updateDocumentTitle && vchanWindow.activeChannelRds) {
-    vchanWindow.updateDocumentTitle(vchanWindow.activeChannelRds());
-  }
+  hostCore.updateDocumentTitle(hostCore.activeChannelRds());
   vchanRenderSchedulerRelease();
 }
 async function vchanAllocate() {
   if (!vchanSessionId || !vchanRigId) return;
-  const freqHz = typeof vchanWindow.lastFreqHz === "number" && vchanWindow.lastFreqHz > 0 ? vchanWindow.lastFreqHz : 0;
+  const freqHz = typeof hostState.lastFreqHz === "number" && hostState.lastFreqHz > 0 ? hostState.lastFreqHz : 0;
   const modeEl = document.getElementById("mode");
   const mode = modeEl ? modeEl.value || "USB" : "USB";
   try {
@@ -251,11 +254,11 @@ async function vchanSubscribe(channelId) {
 }
 function vchanReconnectAudio() {
   const ch = vchanIsOnVirtual() ? vchanActiveChannel() : null;
-  vchanWindow._audioChannelOverride = ch?.id ?? null;
-  if (!vchanWindow.rxActive) return;
-  vchanWindow.stopRxAudio?.();
+  hostState.audioChannelOverride = ch?.id ?? null;
+  if (!hostState.rxActive) return;
+  hostCore.stopRxAudio();
   setTimeout(() => {
-    vchanWindow.startRxAudio?.();
+    hostCore.startRxAudio();
   }, 300);
 }
 function vchanApplyCapabilities(caps) {
@@ -276,11 +279,7 @@ function vchanUpdateFreqDisplay() {
   if (!ch) return;
   const el = document.getElementById("freq");
   if (!el) return;
-  if (vchanWindow.formatFreqForStep && typeof vchanWindow.jogUnit === "number") {
-    el.value = vchanWindow.formatFreqForStep(ch.freq_hz, vchanWindow.jogUnit);
-  } else {
-    el.value = (ch.freq_hz / 1e6).toFixed(6).replace(/\.?0+$/, "");
-  }
+  el.value = hostCore.formatFreqForStep(ch.freq_hz, hostState.jogUnit);
 }
 function vchanSyncModeDisplay() {
   const modeEl = document.getElementById("mode");
@@ -290,21 +289,21 @@ function vchanSyncModeDisplay() {
     if (ch && ch.mode) modeEl.value = ch.mode.toUpperCase();
   }
   const modeUpper = (modeEl.value || "").toUpperCase();
-  if (typeof vchanWindow.lastModeName === "string") {
-    if (modeUpper === "WFM" && vchanWindow.lastModeName !== "WFM") {
-      vchanWindow.setJogDivisor?.(10);
-      vchanWindow.resetRdsDisplay?.();
-    } else if (modeUpper !== "WFM" && vchanWindow.lastModeName === "WFM") {
-      vchanWindow.resetRdsDisplay?.();
+  if (typeof hostState.lastModeName === "string") {
+    if (modeUpper === "WFM" && hostState.lastModeName !== "WFM") {
+      hostCore.setJogDivisor(10);
+      hostCore.resetRdsDisplay();
+    } else if (modeUpper !== "WFM" && hostState.lastModeName === "WFM") {
+      hostCore.resetRdsDisplay();
     }
-    vchanWindow.lastModeName = modeUpper;
+    hostState.lastModeName = modeUpper;
   }
-  vchanWindow.updateWfmControls?.();
-  vchanWindow.updateSdrSquelchControlVisibility?.();
+  hostCore.updateWfmControls();
+  hostCore.updateSdrSquelchControlVisibility();
   if (vchanWindow.refreshRdsUi) {
     vchanWindow.refreshRdsUi();
   } else {
-    vchanWindow.positionRdsPsOverlay?.();
+    hostCore.positionRdsPsOverlay();
   }
 }
 function vchanSyncBwDisplay() {
@@ -314,12 +313,12 @@ function vchanSyncBwDisplay() {
   const bwEl = document.getElementById("spectrum-bw-input");
   if (!bwEl) return;
   let bwHz = ch.bandwidth_hz || 0;
-  if (bwHz === 0 && vchanWindow.mwDefaultsForMode) {
-    bwHz = vchanWindow.mwDefaultsForMode(ch.mode)[0] || 0;
+  if (bwHz === 0) {
+    bwHz = hostCore.mwDefaultsForMode(ch.mode)[0] || 0;
   }
   if (bwHz > 0) {
     bwEl.value = (bwHz / 1e3).toFixed(3).replace(/\.?0+$/, "");
-    vchanWindow.currentBandwidthHz = bwHz;
+    hostState.currentBandwidthHz = bwHz;
   }
 }
 function vchanSyncAccentUI() {
@@ -333,25 +332,20 @@ function vchanSyncAccentUI() {
     vchanSyncModeDisplay();
     vchanSyncBwDisplay();
   } else {
-    origRefreshFreqDisplay?.();
-  }
-  if (vchanWindow.updateDocumentTitle && vchanWindow.activeChannelRds) {
-    vchanWindow.updateDocumentTitle(vchanWindow.activeChannelRds());
+    hostCore.refreshFreqDisplay();
   }
+  hostCore.updateDocumentTitle(hostCore.activeChannelRds());
 }
-var origRefreshFreqDisplay = null;
 function vchanSetChannelFreq(freqHz) {
   if (!vchanRigId || !vchanActiveId) return;
-  if (vchanWindow.lastSpectrumData && vchanWindow.lastSpectrumData.sample_rate > 0) {
-    const halfSpan = vchanWindow.lastSpectrumData.sample_rate / 2;
-    const center = vchanWindow.lastSpectrumData.center_hz;
+  if (hostState.lastSpectrumData && hostState.lastSpectrumData.sample_rate > 0) {
+    const halfSpan = hostState.lastSpectrumData.sample_rate / 2;
+    const center = hostState.lastSpectrumData.center_hz;
     if (Math.abs(freqHz - center) > halfSpan) {
-      if (vchanWindow.showHint) {
-        vchanWindow.showHint(
-          `Out of SDR bandwidth (center ${(center / 1e6).toFixed(3)} MHz ±${(halfSpan / 1e3).toFixed(0)} kHz)`,
-          3e3
-        );
-      }
+      hostCore.showHint(
+        `Out of SDR bandwidth (center ${(center / 1e6).toFixed(3)} MHz ±${(halfSpan / 1e3).toFixed(0)} kHz)`,
+        3e3
+      );
       return;
     }
   }
@@ -413,13 +407,17 @@ async function vchanInterceptBandwidth(bwHz) {
 }
 function vchanInterceptFrequency(freqHz) {
   if (!vchanIsOnVirtual()) return false;
-  const core = vchanWindow.trx?.core;
   const targetHz = Math.round(freqHz);
-  core?.armOptimisticFrequency(targetHz);
-  core?.applyLocalTunedFrequency(targetHz);
+  hostCore.armOptimisticFrequency(targetHz);
+  hostCore.applyLocalTunedFrequency(targetHz);
   vchanSetChannelFreq(freqHz);
   return true;
 }
+function vchanInterceptFreqDisplay() {
+  if (!vchanIsOnVirtual()) return false;
+  vchanUpdateFreqDisplay();
+  return true;
+}
 vchanWindow.trx ??= {};
 vchanWindow.trx.modules ??= {};
 vchanWindow.trx.modules.vchan = {
@@ -437,6 +435,7 @@ vchanWindow.trx.modules.vchan = {
   interceptMode: vchanInterceptMode,
   interceptBandwidth: vchanInterceptBandwidth,
   interceptFrequency: vchanInterceptFrequency,
+  interceptFreqDisplay: vchanInterceptFreqDisplay,
   takeSchedulerControl: vchanTakeSchedulerControl,
   releaseToScheduler: vchanToggleSchedulerRelease
 };
@@ -450,13 +449,3 @@ vchanWindow.trx.modules.vchan = {
   vchanStartSchedulerReleasePolling();
   vchanRenderSchedulerRelease();
 })();
-(function() {
-  origRefreshFreqDisplay = vchanWindow.refreshFreqDisplay ?? null;
-  vchanWindow.refreshFreqDisplay = function() {
-    if (vchanIsOnVirtual()) {
-      vchanUpdateFreqDisplay();
-      return;
-    }
-    origRefreshFreqDisplay?.();
-  };
-})();

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

@@ -1,6 +1,10 @@
+import {
+  hostCore
+} from "./chunk-KL66PICH.js";
+
 // src/plugins/vdes.ts
 var vdesWindow = window;
-var escapeVdesHtml = (input) => vdesWindow.escapeMapHtml?.(input) ?? input.replaceAll("&", "&amp;").replaceAll("<", "&lt;").replaceAll(">", "&gt;").replaceAll('"', "&quot;");
+var escapeVdesHtml = (input) => hostCore.escapeMapHtml(input);
 var vdesStatus = document.getElementById("vdes-status");
 var vdesMessagesEl = document.getElementById("vdes-messages");
 var vdesFilterInput = document.getElementById("vdes-filter");
@@ -231,7 +235,7 @@ document.getElementById("settings-clear-vdes-history")?.addEventListener("click"
   void (async () => {
     if (!await vdesWindow.trxUi.confirm({ title: "Clear VDES history?", message: "All stored VDES decodes will be permanently removed.", confirmLabel: "Clear history" })) return;
     try {
-      await vdesWindow.postPath?.("/clear_vdes_decode");
+      await hostCore.postPath("/clear_vdes_decode");
       resetVdesHistoryView();
     } catch (e) {
       console.error("VDES history clear failed", e);

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

@@ -1,3 +1,7 @@
+import {
+  hostCore
+} from "./chunk-KL66PICH.js";
+
 // src/plugins/wefax.ts
 var wefaxWindow = window;
 var wefaxDom = {
@@ -299,7 +303,7 @@ if (wefaxDom.toggleBtn) {
         if (wefaxWindow.takeSchedulerControlForDecoderDisable) {
           await wefaxWindow.takeSchedulerControlForDecoderDisable(toggleButton);
         }
-        await wefaxWindow.postPath?.("/toggle_wefax_decode");
+        await hostCore.postPath("/toggle_wefax_decode");
       } catch (e) {
         console.error("WEFAX toggle failed", e);
       }
@@ -310,7 +314,7 @@ if (wefaxDom.clearBtn) {
   wefaxDom.clearBtn.addEventListener("click", () => {
     void (async () => {
       try {
-        await wefaxWindow.postPath?.("/clear_wefax_decode");
+        await hostCore.postPath("/clear_wefax_decode");
         resetWefaxHistoryView();
       } catch (e) {
         console.error("WEFAX clear failed", e);

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

@@ -1,3 +1,7 @@
+import {
+  hostCore
+} from "./chunk-KL66PICH.js";
+
 // src/plugins/wspr.ts
 var wsprWindow = window;
 var wsprStatus = document.getElementById("wspr-status");
@@ -229,7 +233,7 @@ wsprDecodeToggleBtn?.addEventListener("click", () => {
   void (async () => {
     try {
       await wsprWindow.takeSchedulerControlForDecoderDisable?.(wsprDecodeToggleBtn);
-      await wsprWindow.postPath?.("/toggle_wspr_decode");
+      await hostCore.postPath("/toggle_wspr_decode");
     } catch (error) {
       console.error("WSPR toggle failed", error);
     }
@@ -239,7 +243,7 @@ document.getElementById("settings-clear-wspr-history")?.addEventListener("click"
   void (async () => {
     if (!await wsprWindow.trxUi.confirm({ title: "Clear WSPR history?", message: "All stored WSPR decodes will be permanently removed.", confirmLabel: "Clear history" })) return;
     try {
-      await wsprWindow.postPath?.("/clear_wspr_decode");
+      await hostCore.postPath("/clear_wspr_decode");
       resetWsprHistoryView();
     } catch (error) {
       console.error("WSPR history clear failed", error);

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/README.md

@@ -42,6 +42,9 @@ source change.
 - `core/` contains dependency-light shared helpers.
 - `features/` contains application behavior grouped by responsibility.
 - `plugins/` contains lazy decoder and high-coupling feature entries.
+- `plugins/host.ts` declares the typed `window.trx` state and services that
+  feature bundles read; feature entries import it rather than reaching for bare
+  `window` properties, which the module graph does not publish.
 - Files under `assets/web/vendor/` are vendored JavaScript and are not part of
   the TypeScript migration.
 

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

@@ -203,6 +203,7 @@ interface TrxModules {
     handleSession(data: string): void;
     interceptBandwidth(bandwidthHz: number): Promise<boolean>;
     interceptFrequency(frequencyHz: number): boolean;
+    interceptFreqDisplay(): boolean;
     interceptMode(mode: string): Promise<boolean>;
     isOnVirtual(): boolean;
     takeSchedulerControl(): Promise<void>;
@@ -236,7 +237,10 @@ interface TrxState {
   readonly aisVesselUrlBase: string | null;
   readonly serverRigs: RigListItem[];
   readonly serverActiveRigId: string | null;
-  readonly lastModeName: string;
+  lastModeName: string;
+  readonly jogUnit: number;
+  readonly rxActive: boolean;
+  audioChannelOverride: string | null;
   readonly lastSpectrumData: SpectrumFrame | null;
   readonly lastSpectrumRenderData: SpectrumFrame | null;
   currentBandwidthHz: number;
@@ -1987,6 +1991,9 @@ function refreshWavelengthDisplay(hz: number) {
 }
 
 function refreshFreqDisplay() {
+  // On a virtual channel the field must show that channel's frequency; SSE
+  // rig-state updates would otherwise overwrite it with the primary channel.
+  if (window.trx?.modules.vchan?.interceptFreqDisplay()) return;
   if (lastFreqHz == null || freqDirty) return;
   freqEl.value = formatFreqForStep(lastFreqHz, jogUnit);
   refreshWavelengthDisplay(lastFreqHz);
@@ -4856,7 +4863,10 @@ Object.defineProperties(trxState, {
   aisVesselUrlBase:       { get() { return aisVesselUrlBase;      } },
   serverRigs:             { get() { return serverRigs;            } },
   serverActiveRigId:      { get() { return serverActiveRigId;     } },
-  lastModeName:           { get() { return lastModeName;          } },
+  lastModeName:           { get() { return lastModeName;          }, set(v: string) { lastModeName = v; } },
+  jogUnit:                { get() { return jogUnit;               } },
+  rxActive:               { get() { return rxActive;              } },
+  audioChannelOverride:   { get() { return _audioChannelOverride; }, set(v: string | null) { _audioChannelOverride = v; } },
   lastSpectrumData:       { get() { return lastSpectrumData;      } },
   lastSpectrumRenderData: { get() { return lastSpectrumRenderData; } },
   currentBandwidthHz:     { get() { return currentBandwidthHz;     }, set(v: number) { currentBandwidthHz = v; window.currentBandwidthHz = v; } },
@@ -4875,6 +4885,9 @@ const trxCore = Object.freeze({
   postPath, scheduleUiFrameJob, navigateToTab, rigBadgeColor,
   setRigFrequency, applyLocalTunedFrequency, armOptimisticFrequency,
   syncBandwidthInput, scheduleSpectrumDraw, onDecoderRegistryReady,
+  formatFreqForStep, refreshFreqDisplay, setJogDivisor, mwDefaultsForMode,
+  resetRdsDisplay, positionRdsPsOverlay, updateWfmControls,
+  updateSdrSquelchControlVisibility, startRxAudio, stopRxAudio,
   latLonToMaidenhead, locatorToLatLon, haversineKm, formatDistanceKm,
   formatTimeAgo, bookmarkDistanceText, buildBookmarkTooltipText,
   nearestBookmarkForHz, currentDecodeHistoryRetentionMs,
@@ -5495,8 +5508,9 @@ function extractAudioFrameChannels(frame: AudioData) {
   return out;
 }
 
-// Optional channel_id injected by vchan.js when connecting to a virtual channel.
-const _audioChannelOverride: string | null = null;
+// Optional channel_id set by the vchan feature when a virtual channel is
+// active, so RX audio subscribes to that channel instead of the primary one.
+let _audioChannelOverride: string | null = null;
 
 /** Schedule decoded PCM channels for playback via Web Audio API. */
 function scheduleDecodedAudio(channelData: Float32Array[], frameCount: number, sampleRate: number) {

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

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+import { hostCore, hostState } from "./host.js";
+
 export {};
 
 import type { PluginRuntimeWindow } from "./runtime-contract";
@@ -27,22 +29,15 @@ interface AisChannelInfo { label: string; badgeClass: string; freqText: string }
 interface AisBridge {
   getDecodeHistoryRetentionMs?: () => number;
   trxScheduleUiFrameJob?: (key: string, job: () => void) => void;
-  escapeMapHtml?: (input: string) => string;
   buildAisVesselUrl?: (mmsi: number | null | undefined) => string | null;
-  serverLat?: number | null;
-  serverLon?: number | null;
-  haversineKm?: (lat1: number, lon1: number, lat2: number, lon2: number) => number;
   aisMapAddVessel?: (message: AisMessage) => void;
   clearMapMarkersByType?: (type: string) => void;
-  postPath?: (path: string) => Promise<unknown>;
   trxUi: { confirm(options: { title: string; message: string; confirmLabel: string }): Promise<boolean> };
   updateAisBar?: () => void;
   clearAisBar?: () => void;
 }
 const aisWindow = window as unknown as AisBridge;
-const escapeAisHtml = (input: string): string => aisWindow.escapeMapHtml?.(input) ?? input
-  .replaceAll("&", "&amp;").replaceAll("<", "&lt;")
-  .replaceAll(">", "&gt;").replaceAll('"', "&quot;");
+const escapeAisHtml = (input: string): string => hostCore.escapeMapHtml(input);
 
 // --- AIS Decoder Plugin (server-side decode) ---
 const aisStatus = document.getElementById("ais-status");
@@ -176,10 +171,10 @@ function aisRouteText(msg: AisMessage): string {
 }
 
 function aisDistanceText(msg: AisMessage): string {
-  if (aisWindow.serverLat == null || aisWindow.serverLon == null || msg.lat == null || msg.lon == null || !aisWindow.haversineKm) {
+  if (hostState.serverLat == null || hostState.serverLon == null || msg.lat == null || msg.lon == null) {
     return "";
   }
-  const distKm = aisWindow.haversineKm(aisWindow.serverLat, aisWindow.serverLon, msg.lat, msg.lon);
+  const distKm = hostCore.haversineKm(hostState.serverLat, hostState.serverLon, msg.lat, msg.lon);
   if (!Number.isFinite(distKm)) return "";
   if (distKm < 1) return `${Math.round(distKm * 1000)} m from TRX`;
   return `${distKm.toFixed(1)} km from TRX`;
@@ -405,7 +400,7 @@ function pruneAisHistoryView(): void {
 document.getElementById("settings-clear-ais-history")?.addEventListener("click", () => { void (async () => {
   if (!await aisWindow.trxUi.confirm({ title: "Clear AIS history?", message: "All stored AIS messages will be permanently removed.", confirmLabel: "Clear history" })) return;
   try {
-    await aisWindow.postPath?.("/clear_ais_decode");
+    await hostCore.postPath("/clear_ais_decode");
     resetAisHistoryView();
   } catch (e) {
     console.error("AIS history clear failed", e);

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

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+import { hostCore, hostState } from "./host.js";
+
 import {
   aprsAgeText,
   aprsCategoryLabel,
@@ -18,26 +20,18 @@ import type { PluginRuntimeWindow } from "./runtime-contract";
 interface AprsBridge {
   getDecodeHistoryRetentionMs?: () => number;
   trxScheduleUiFrameJob?: (key: string, job: () => void) => void;
-  serverLat?: number | null;
-  serverLon?: number | null;
-  haversineKm?: (lat1: number, lon1: number, lat2: number, lon2: number) => number;
-  escapeMapHtml?: (input: string) => string;
   navigateToAprsMap?: (lat: number, lon: number) => void;
-  showHint?: (message: string, durationMs: number) => void;
   clearMapMarkersByType?: (type: string) => void;
   aprsMapAddStation?: (call: string, lat: number, lon: number, info: string, symbolTable: string | null | undefined, symbolCode: string | null | undefined, packet: AprsPacket) => void;
   getDecodeRigMeta?: () => unknown;
-  postPath?: (path: string) => Promise<unknown>;
   trxUi: { confirm(options: { title: string; message: string; confirmLabel: string }): Promise<boolean> };
   updateAprsBar?: () => void;
   clearAprsBar?: () => void;
   closeAprsBar?: () => void;
 }
 const aprsWindow = window as unknown as AprsBridge;
-const escapeAprsHtml = (input: string): string => aprsWindow.escapeMapHtml?.(input) ?? input
-  .replaceAll("&", "&amp;").replaceAll("<", "&lt;")
-  .replaceAll(">", "&gt;").replaceAll('"', "&quot;");
-const showAprsHint = (message: string, durationMs: number): void => { aprsWindow.showHint?.(message, durationMs); };
+const escapeAprsHtml = (input: string): string => hostCore.escapeMapHtml(input);
+const showAprsHint = (message: string, durationMs: number): void => { hostCore.showHint(message, durationMs); };
 
 // --- APRS Decoder Plugin (server-side decode) ---
 const aprsStatus = document.getElementById("aprs-status");
@@ -87,8 +81,8 @@ function scheduleAprsBarUpdate() {
 }
 
 function aprsDistanceText(pkt: AprsPacket): string {
-  if (aprsWindow.serverLat == null || aprsWindow.serverLon == null || pkt.lat == null || pkt.lon == null || !aprsWindow.haversineKm) return "";
-  const distKm = aprsWindow.haversineKm(aprsWindow.serverLat, aprsWindow.serverLon, pkt.lat, pkt.lon);
+  if (hostState.serverLat == null || hostState.serverLon == null || pkt.lat == null || pkt.lon == null) return "";
+  const distKm = hostCore.haversineKm(hostState.serverLat, hostState.serverLon, pkt.lat, pkt.lon);
   if (!Number.isFinite(distKm)) return "";
   if (distKm < 1) return `${Math.round(distKm * 1000)} m from TRX`;
   return `${distKm.toFixed(1)} km from TRX`;
@@ -354,7 +348,7 @@ function onServerAprsBatch(packets: AprsPacket[]): void {
 document.getElementById("settings-clear-aprs-history")?.addEventListener("click", () => { void (async () => {
   if (!await aprsWindow.trxUi.confirm({ title: "Clear APRS history?", message: "All stored APRS packets will be permanently removed.", confirmLabel: "Clear history" })) return;
   try {
-    await aprsWindow.postPath?.("/clear_aprs_decode");
+    await hostCore.postPath("/clear_aprs_decode");
     resetAprsHistoryView();
   } catch (e) {
     console.error("APRS history clear failed", e);

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

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+import { hostState } from "./host.js";
+
 export {};
 
 interface DecoderDescriptor {
@@ -38,7 +40,6 @@ interface BackgroundDecodeStatus {
 }
 interface BackgroundBridge {
   decoderRegistry?: DecoderDescriptor[];
-  authEnabled?: boolean;
   trxUi: { confirm(options: { title: string; message: string; confirmLabel: string }): Promise<boolean> };
   trx?: { modules?: { backgroundDecode?: BackgroundDecodeService } };
 }
@@ -170,7 +171,7 @@ const bgdWindow = window as unknown as BackgroundBridge;
     setCheckbox("background-decode-enabled", currentConfig.enabled);
     renderBookmarkChecklist();
 
-    const isControl = backgroundDecodeRole === "control" || bgdWindow.authEnabled === false;
+    const isControl = backgroundDecodeRole === "control" || hostState.authEnabled === false;
     const panel = document.getElementById("background-decode-panel");
     if (panel) {
         panel.querySelectorAll<HTMLInputElement | HTMLSelectElement | HTMLButtonElement>("input, select, button.sch-write").forEach(function (el) {

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

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+import { hostCore, hostState } from "./host.js";
+
 export {};
 
 /* DOM IDs in the server-owned page are required by this feature; bmEl throws
@@ -19,14 +21,6 @@ interface Bookmark {
   scope?: string;
 }
 
-interface DecoderDescriptor {
-  id: string;
-  label: string;
-  activation?: string;
-  active_modes?: string[];
-  bookmark_selectable?: boolean;
-}
-
 interface BookmarkService {
   readonly overlayList: readonly Bookmark[];
   readonly overlayRevision: number;
@@ -43,37 +37,8 @@ interface VirtualChannelService {
   takeSchedulerControl(): Promise<void>;
 }
 
-/* Application state read through the `window.trx` host contract.  This plugin
- * is a separate bundle, so it cannot import the application module directly. */
-interface BookmarkHostState {
-  readonly authEnabled: boolean;
-  readonly authRole: string | null;
-  readonly lastActiveRigId: string | null;
-  readonly lastRigIds: string[];
-  readonly lastRigDisplayNames: Record<string, string>;
-  readonly lastFreqHz: number | null;
-  readonly lastModeName: string;
-  readonly lastSpectrumData: unknown;
-  currentBandwidthHz: number;
-  readonly decoderRegistry: readonly DecoderDescriptor[];
-}
-
-interface BookmarkHostCore {
-  postPath(path: string): Promise<unknown>;
-  setRigFrequency(frequencyHz: number): void;
-  applyLocalTunedFrequency(frequencyHz: number, forceDisplay?: boolean): void;
-  armOptimisticFrequency(frequencyHz: number): void;
-  syncBandwidthInput(bandwidthHz: number): void;
-  scheduleSpectrumDraw(): void;
-  onDecoderRegistryReady(callback: () => void): void;
-}
-
 interface BookmarkBridge {
-  trx: {
-    state: BookmarkHostState;
-    core: BookmarkHostCore;
-    modules: { bookmarks?: BookmarkService; vchan?: VirtualChannelService };
-  };
+  trx: { modules: { bookmarks?: BookmarkService; vchan?: VirtualChannelService } };
   trxUi: {
     confirm(options: { title: string; message: string; confirmLabel: string; danger?: boolean }): Promise<boolean>;
     notify?(message: string, options: { kind: "error" }): void;
@@ -83,8 +48,6 @@ interface BookmarkBridge {
 
 type BookmarkElement = HTMLElement & HTMLInputElement & HTMLSelectElement;
 const bridge = window as unknown as BookmarkBridge;
-const trxState = bridge.trx.state;
-const trxCore = bridge.trx.core;
 function bmEl(id: string): BookmarkElement {
   const element = document.getElementById(id);
   if (!element) throw new Error(`Missing bookmark element #${id}`);
@@ -137,7 +100,7 @@ function bmEsc(str: unknown): string {
 }
 
 function bmCanControl() {
-  return !trxState.authEnabled || trxState.authRole === "control";
+  return !hostState.authEnabled || hostState.authRole === "control";
 }
 
 // Show/hide the Add Bookmark / Select All buttons based on the current auth role.
@@ -151,7 +114,7 @@ function bmSyncAccess() {
 
 /** The listing scope: always the active rig (to merge general + rig bookmarks). */
 function bmListScope() {
-  return trxState.lastActiveRigId || "general";
+  return hostState.lastActiveRigId || "general";
 }
 
 async function bmFetchOverlay() {
@@ -168,7 +131,7 @@ async function bmFetchOverlay() {
   if (typeof bridge.syncBookmarkMapLocators === "function") {
     bridge.syncBookmarkMapLocators(bmOverlayList);
   }
-  trxCore.scheduleSpectrumDraw();
+  hostCore.scheduleSpectrumDraw();
 }
 
 async function bmFetch(categoryFilter: string): Promise<void> {
@@ -324,7 +287,7 @@ function bmChangePage(delta: number): void {
 
 // Read decoder checkboxes and return an array of selected decoder names.
 function bmReadDecoders(): string[] {
-  return trxState.decoderRegistry
+  return hostState.decoderRegistry
     .filter(d => d.bookmark_selectable)
     .filter(d => bmOptionalEl("bm-dec-" + d.id)?.checked)
     .map(d => d.id);
@@ -333,7 +296,7 @@ function bmReadDecoders(): string[] {
 // Set decoder checkboxes to match the given array.
 function bmWriteDecoders(decoders: readonly string[]): void {
   const set = new Set(decoders || []);
-  trxState.decoderRegistry
+  hostState.decoderRegistry
     .filter(d => d.bookmark_selectable)
     .forEach(d => {
       const el = bmOptionalEl("bm-dec-" + d.id);
@@ -346,7 +309,7 @@ function bmBuildDecoderCheckboxes() {
   const container = bmEl("bm-decoder-checkboxes");
   if (!container) return;
   container.innerHTML = "";
-  trxState.decoderRegistry
+  hostState.decoderRegistry
     .filter(d => d.bookmark_selectable)
     .forEach(d => {
       const label = document.createElement("label");
@@ -387,18 +350,18 @@ function bmCloseForm() {
 
 function bmPrefillFromStatus() {
   // Read live rig state from the host contract (updated by the SSE stream).
-  const freqHz = trxState.lastFreqHz;
+  const freqHz = hostState.lastFreqHz;
   if (freqHz != null && Number.isFinite(freqHz)) {
     bmEl("bm-freq").value = String(Math.round(freqHz));
   }
-  if (trxState.lastModeName) {
-    bmEl("bm-mode").value = trxState.lastModeName;
+  if (hostState.lastModeName) {
+    bmEl("bm-mode").value = hostState.lastModeName;
   }
-  if (trxState.currentBandwidthHz > 0) {
-    bmEl("bm-bw").value = String(Math.round(trxState.currentBandwidthHz));
+  if (hostState.currentBandwidthHz > 0) {
+    bmEl("bm-bw").value = String(Math.round(hostState.currentBandwidthHz));
   }
   // Prefill decoder checkboxes from current toggle button state.
-  const activeDecoders = trxState.decoderRegistry
+  const activeDecoders = hostState.decoderRegistry
     .filter(d => d.bookmark_selectable && d.activation === "toggle")
     .filter(d => bmOptionalEl(d.id + "-decode-toggle-btn")?.dataset.enabled === "true")
     .map(d => d.id);
@@ -495,15 +458,15 @@ function bmApply(bm: Bookmark): void {
       modeEl.value = (bm.mode || "").toUpperCase();
     }
     if (bm.bandwidth_hz) {
-      trxState.currentBandwidthHz = bm.bandwidth_hz;
-      trxCore.syncBandwidthInput(bm.bandwidth_hz);
+      hostState.currentBandwidthHz = bm.bandwidth_hz;
+      hostCore.syncBandwidthInput(bm.bandwidth_hz);
     }
     // Set optimistic guard before applying so SSE cannot snap back.
-    trxCore.armOptimisticFrequency(bm.freq_hz);
+    hostCore.armOptimisticFrequency(bm.freq_hz);
     // Force display so the BW overlay is repositioned even when freq is unchanged.
-    trxCore.applyLocalTunedFrequency(bm.freq_hz, true);
-    if (trxState.lastSpectrumData) {
-      trxCore.scheduleSpectrumDraw();
+    hostCore.applyLocalTunedFrequency(bm.freq_hz, true);
+    if (hostState.lastSpectrumData) {
+      hostCore.scheduleSpectrumDraw();
     }
 
     // Take scheduler control up front, then apply mode before bandwidth so a
@@ -513,21 +476,21 @@ function bmApply(bm: Bookmark): void {
 
       const onVirtual = await bridge.trx.modules.vchan?.interceptMode(bm.mode) ?? false;
       if (!onVirtual) {
-        await trxCore.postPath("/set_mode?mode=" + encodeURIComponent(bm.mode));
+        await hostCore.postPath("/set_mode?mode=" + encodeURIComponent(bm.mode));
       }
 
       if (bm.bandwidth_hz) {
         const bwHandledByVchan =
           await bridge.trx.modules.vchan?.interceptBandwidth(bm.bandwidth_hz) ?? false;
         if (!bwHandledByVchan) {
-          await trxCore.postPath(`/set_bandwidth?hz=${bm.bandwidth_hz}`);
+          await hostCore.postPath(`/set_bandwidth?hz=${bm.bandwidth_hz}`);
         }
       }
 
       // setRigFrequency redirects to the channel API when a virtual channel is
       // active.  It repeats the optimistic update applied above, which is a
       // no-op because the value is unchanged.
-      trxCore.setRigFrequency(bm.freq_hz);
+      hostCore.setRigFrequency(bm.freq_hz);
     })();
     // Decoder toggles — fire-and-forget.
     //  - Decoders incompatible with the new mode are always turned off
@@ -537,12 +500,12 @@ function bmApply(bm: Bookmark): void {
     //    alone.
     const hasDecoders = Array.isArray(bm.decoders) && bm.decoders.length > 0;
     const modeUp = (bm.mode || "").toUpperCase();
-    const allToggleDecoders = trxState.decoderRegistry.filter(d =>
+    const allToggleDecoders = hostState.decoderRegistry.filter(d =>
       d.activation === "toggle"
     );
     const decoderPromise = allToggleDecoders.length ? (async () => {
       let statusUrl = "/status";
-      const rigId = trxState.lastActiveRigId;
+      const rigId = hostState.lastActiveRigId;
       if (rigId) {
         statusUrl += "?remote=" + encodeURIComponent(rigId);
       }
@@ -566,7 +529,7 @@ function bmApply(bm: Bookmark): void {
           wanted = currentlyOn;
         }
         if (wanted !== currentlyOn) {
-          toggles.push(trxCore.postPath("/toggle_" + d.id.replace(/-/g, "_") + "_decode"));
+          toggles.push(hostCore.postPath("/toggle_" + d.id.replace(/-/g, "_") + "_decode"));
         }
       }
       if (toggles.length) await Promise.all(toggles);
@@ -616,8 +579,8 @@ function bmUpdateSelectionUi() {
 function bmPopulateMoveTarget() {
   const sel = bmEl("bm-move-target");
   if (!sel) return;
-  const rigIds = trxState.lastRigIds;
-  const displayNames = trxState.lastRigDisplayNames;
+  const rigIds = hostState.lastRigIds;
+  const displayNames = hostState.lastRigDisplayNames;
   const prev = sel.value;
   sel.innerHTML = "";
   if (bmScope !== "general") {
@@ -725,8 +688,8 @@ async function bmDeleteSelected() {
 function bmPopulateScopePicker() {
   const picker = bmEl("bm-scope-picker");
   if (!picker) return;
-  const rigIds = trxState.lastRigIds;
-  const displayNames = trxState.lastRigDisplayNames;
+  const rigIds = hostState.lastRigIds;
+  const displayNames = hostState.lastRigDisplayNames;
   // Preserve current selection if still valid.
   const prev = picker.value;
   while (picker.options.length > 1) picker.remove(1);
@@ -753,7 +716,7 @@ function bmPopulateScopePicker() {
   // Build decoder checkboxes from registry.  The registry is fetched async
   // so we rebuild once it arrives to ensure checkboxes are present.
   bmBuildDecoderCheckboxes();
-  trxCore.onDecoderRegistryReady(bmBuildDecoderCheckboxes);
+  hostCore.onDecoderRegistryReady(bmBuildDecoderCheckboxes);
 
   // Scope picker
   bmPopulateScopePicker();

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

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+import { hostCore } from "./host.js";
+
 import type { PluginRuntimeWindow } from "./runtime-contract.js";
 
 export {};
@@ -30,8 +32,6 @@ interface CwBridge {
   lastFreqHz?: number;
   currentBandwidthHz?: number;
   lastSpectrumData?: CwSpectrum;
-  escapeMapHtml?: (input: string) => string;
-  postPath?: (path: string) => Promise<unknown>;
   trxUi: { confirm(options: { title: string; message: string; confirmLabel: string }): Promise<boolean> };
   applyCwAutoUi?: (enabled: boolean) => void;
   applyCwAutoUiFromServer?: (enabled: boolean) => void;
@@ -75,9 +75,7 @@ let cwBarDismissedAtMs = 0;
 let cwAutoLocalOverride: boolean | null = null;
 
 function escapeCwHtml(input: string): string {
-  return cwWindow.escapeMapHtml?.(input) ?? input
-    .replaceAll("&", "&amp;").replaceAll("<", "&lt;")
-    .replaceAll(">", "&gt;").replaceAll('"', "&quot;");
+  return hostCore.escapeMapHtml(input);
 }
 
 function applyCwAutoUi(enabled: boolean): void {
@@ -344,7 +342,7 @@ async function setCwTone(tone: unknown, { syncInput = true }: { syncInput?: bool
     cwToneInput.value = String(clamped);
   }
   try {
-    await cwWindow.postPath?.(`/set_cw_tone?tone_hz=${encodeURIComponent(clamped)}`);
+    await hostCore.postPath(`/set_cw_tone?tone_hz=${encodeURIComponent(clamped)}`);
   } catch (e) {
     console.error("CW tone set failed", e);
   }
@@ -358,7 +356,7 @@ if (cwAutoInput) {
       cwAutoLocalOverride = enabled;
       applyCwAutoUi(enabled);
       try {
-        await cwWindow.postPath?.(`/set_cw_auto?enabled=${enabled ? "true" : "false"}`);
+        await hostCore.postPath(`/set_cw_auto?enabled=${enabled ? "true" : "false"}`);
         drawCwTonePicker();
       } catch (error: unknown) {
         console.error("CW auto toggle failed", error);
@@ -375,7 +373,7 @@ if (cwWpmInput) {
       if (cwAutoInput?.checked) return;
       const wpm = clampCwWpm(cwWpmInput.value);
       cwWpmInput.value = String(wpm);
-      try { await cwWindow.postPath?.(`/set_cw_wpm?wpm=${encodeURIComponent(wpm)}`); }
+      try { await hostCore.postPath(`/set_cw_wpm?wpm=${encodeURIComponent(wpm)}`); }
       catch (error: unknown) { console.error("CW WPM set failed", error); }
     })();
   });
@@ -413,7 +411,7 @@ document.getElementById("settings-clear-cw-history")?.addEventListener("click",
   void (async () => {
     if (!await cwWindow.trxUi.confirm({ title: "Clear CW history?", message: "All stored CW decodes will be permanently removed.", confirmLabel: "Clear history" })) return;
     try {
-      await cwWindow.postPath?.("/clear_cw_decode");
+      await hostCore.postPath("/clear_cw_decode");
       resetCwHistoryView();
     } catch (error: unknown) {
       console.error("CW history clear failed", error);

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

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+import { hostCore } from "./host.js";
+
 import type { PluginRuntimeWindow } from "./runtime-contract.js";
 
 export type FtxDecoderId = "ft2" | "ft4" | "ft8";
@@ -45,8 +47,6 @@ interface FtxBridge {
   updateFt8Bar?: () => void;
   registerFt8FamilyBarRenderer?: (decoder: FtxDecoderId, renderer: () => BarFrames) => void;
   takeSchedulerControlForDecoderDisable?: (button: HTMLElement) => Promise<void>;
-  postPath?: (path: string) => Promise<unknown>;
-  fmtTime?: (timestampMs: number) => string;
   trxUi: ConfirmApi;
   clearFt8Bar?: () => void;
   closeFt8Bar?: () => void;
@@ -62,6 +62,14 @@ interface FtxConfig {
 
 const bridge = window as unknown as FtxBridge & PluginRuntimeWindow;
 
+// Legacy ft8.js owned this formatter locally; the shared module kept reading it
+// off `window`, where nothing published it, so bar timestamps rendered empty.
+function formatBarTime(timestampMs: number): string {
+  if (!timestampMs) return "--:--:--";
+  return new Date(timestampMs)
+    .toLocaleTimeString([], { hour: "2-digit", minute: "2-digit", second: "2-digit" });
+}
+
 function finiteNumber(value: unknown): number | null {
   const number = typeof value === "number" ? value : Number(value);
   return Number.isFinite(number) ? number : null;
@@ -274,7 +282,7 @@ export function initializeFtxDecoder(config: FtxConfig): void {
     let html = "";
     for (const message of recent) {
       const timestamp = finiteNumber(message._tsMs ?? message.ts_ms);
-      const time = timestamp === null ? "" : `<span class="aprs-bar-time">${bridge.fmtTime?.(timestamp) ?? ""}</span>`;
+      const time = timestamp === null ? "" : `<span class="aprs-bar-time">${formatBarTime(timestamp)}</span>`;
       const snr = finiteNumber(message.snr_db);
       const delta = finiteNumber(message.dt_s);
       const frequency = displayFrequency(message.freq_hz);
@@ -309,12 +317,12 @@ export function initializeFtxDecoder(config: FtxConfig): void {
   toggle?.addEventListener("click", () => { void (async () => {
     try {
       await bridge.takeSchedulerControlForDecoderDisable?.(toggle);
-      await bridge.postPath?.(`/toggle_${id}_decode`);
+      await hostCore.postPath(`/toggle_${id}_decode`);
     } catch (error: unknown) { console.error(`${label} toggle failed`, error); }
   })(); });
   document.getElementById(`settings-clear-${id}-history`)?.addEventListener("click", () => { void (async () => {
     if (!await bridge.trxUi.confirm({ title: `Clear ${label} history?`, message: `All stored ${label} decodes will be permanently removed.`, confirmLabel: "Clear history" })) return;
-    try { await bridge.postPath?.(`/clear_${id}_decode`); reset(); }
+    try { await hostCore.postPath(`/clear_${id}_decode`); reset(); }
     catch (error: unknown) { console.error(`${label} history clear failed`, error); }
   })(); });
 }

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

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+import { hostCore, hostState } from "./host.js";
+
 import {
   aprsAgeText,
   aprsCategoryLabel,
@@ -19,21 +21,13 @@ import type { PluginRuntimeWindow } from "./runtime-contract";
 interface HfAprsBridge {
   getDecodeHistoryRetentionMs?: () => number;
   trxScheduleUiFrameJob?: (key: string, job: () => void) => void;
-  serverLat?: number | null;
-  serverLon?: number | null;
-  haversineKm?: (lat1: number, lon1: number, lat2: number, lon2: number) => number;
-  escapeMapHtml?: (input: string) => string;
   navigateToAprsMap?: (lat: number, lon: number) => void;
-  showHint?: (message: string, durationMs: number) => void;
   getDecodeRigMeta?: () => unknown;
   takeSchedulerControlForDecoderDisable?: (button: HTMLElement) => Promise<unknown>;
-  postPath?: (path: string) => Promise<unknown>;
   trxUi: { confirm(options: { title: string; message: string; confirmLabel: string }): Promise<boolean> };
 }
 const hfAprsWindow = window as unknown as HfAprsBridge;
-const escapeHfAprsHtml = (input: string): string => hfAprsWindow.escapeMapHtml?.(input) ?? input
-  .replaceAll("&", "&amp;").replaceAll("<", "&lt;")
-  .replaceAll(">", "&gt;").replaceAll('"', "&quot;");
+const escapeHfAprsHtml = (input: string): string => hostCore.escapeMapHtml(input);
 
 // --- HF APRS Decoder Plugin (server-side decode, 300 baud) ---
 const hfAprsStatus = document.getElementById("hf-aprs-status");
@@ -72,8 +66,8 @@ function scheduleHfAprsHistoryRender() {
 }
 
 function hfAprsDistanceText(pkt: AprsPacket): string {
-  if (hfAprsWindow.serverLat == null || hfAprsWindow.serverLon == null || pkt.lat == null || pkt.lon == null || !hfAprsWindow.haversineKm) return "";
-  const distKm = hfAprsWindow.haversineKm(hfAprsWindow.serverLat, hfAprsWindow.serverLon, pkt.lat, pkt.lon);
+  if (hostState.serverLat == null || hostState.serverLon == null || pkt.lat == null || pkt.lon == null) return "";
+  const distKm = hostCore.haversineKm(hostState.serverLat, hostState.serverLon, pkt.lat, pkt.lon);
   if (!Number.isFinite(distKm)) return "";
   if (distKm < 1) return `${Math.round(distKm * 1000)} m from TRX`;
   return `${distKm.toFixed(1)} km from TRX`;
@@ -214,10 +208,10 @@ function renderHfAprsRow(pkt: AprsPacket, isFresh: boolean): HTMLElement {
         const clipboard = Reflect.get(navigator, "clipboard") as Clipboard | undefined;
         if (clipboard) {
           await clipboard.writeText(raw);
-          hfAprsWindow.showHint?.("Coordinates copied", 1200);
+          hostCore.showHint("Coordinates copied", 1200);
         }
       } catch {
-        hfAprsWindow.showHint?.("Copy failed", 1500);
+        hostCore.showHint("Copy failed", 1500);
       }
     })(); });
   }
@@ -289,7 +283,7 @@ const hfAprsDecodeToggleBtn = document.getElementById("hf-aprs-decode-toggle-btn
 hfAprsDecodeToggleBtn?.addEventListener("click", () => { void (async () => {
   try {
     await hfAprsWindow.takeSchedulerControlForDecoderDisable?.(hfAprsDecodeToggleBtn);
-    await hfAprsWindow.postPath?.("/toggle_hf_aprs_decode");
+    await hostCore.postPath("/toggle_hf_aprs_decode");
   } catch (e) {
     console.error("HF APRS toggle failed", e);
   }
@@ -298,7 +292,7 @@ hfAprsDecodeToggleBtn?.addEventListener("click", () => { void (async () => {
 document.getElementById("settings-clear-hf-aprs-history")?.addEventListener("click", () => { void (async () => {
   if (!await hfAprsWindow.trxUi.confirm({ title: "Clear HF APRS history?", message: "All stored HF APRS packets will be permanently removed.", confirmLabel: "Clear history" })) return;
   try {
-    await hfAprsWindow.postPath?.("/clear_hf_aprs_decode");
+    await hostCore.postPath("/clear_hf_aprs_decode");
     resetHfAprsHistoryView();
   } catch (e) {
     console.error("HF APRS history clear failed", e);

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

@@ -0,0 +1,72 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+// Typed view of the `window.trx` host contract for lazy feature bundles.
+//
+// Feature entries are separate esbuild bundles, so they cannot share module
+// instances with the application entry and must reach application state and
+// services through the host namespace documented in
+// `docs/frontend-architecture.md`.  Declaring that contract once here keeps the
+// feature bundles from re-deriving it — and from drifting back to bare `window`
+// properties, which the module graph no longer publishes.
+
+export interface HostDecoderDescriptor {
+  id: string;
+  label: string;
+  activation?: string;
+  active_modes?: string[];
+  bookmark_selectable?: boolean;
+}
+
+export interface HostState {
+  readonly serverLat: number | null;
+  readonly serverLon: number | null;
+  readonly authEnabled: boolean;
+  readonly authRole: string | null;
+  readonly lastActiveRigId: string | null;
+  readonly lastRigIds: string[];
+  readonly lastRigDisplayNames: Record<string, string>;
+  readonly lastFreqHz: number | null;
+  readonly lastSpectrumData: { sample_rate: number; center_hz: number } | null;
+  readonly jogUnit: number;
+  readonly rxActive: boolean;
+  readonly decoderRegistry: readonly HostDecoderDescriptor[];
+  lastModeName: string;
+  currentBandwidthHz: number;
+  audioChannelOverride: string | null;
+}
+
+export interface HostCore {
+  postPath(path: string): Promise<unknown>;
+  applyLocalTunedFrequency(frequencyHz: number, forceDisplay?: boolean): void;
+  armOptimisticFrequency(frequencyHz: number): void;
+  escapeMapHtml(value: string): string;
+  haversineKm(lat1: number, lon1: number, lat2: number, lon2: number): number;
+  showHint(message: string, durationMs?: number): void;
+  formatFreqForStep(frequencyHz: number, stepHz: number): string;
+  refreshFreqDisplay(): void;
+  setJogDivisor(divisor: number): void;
+  mwDefaultsForMode(mode: string): [number, number, number, number];
+  resetRdsDisplay(): void;
+  positionRdsPsOverlay(): void;
+  updateWfmControls(): void;
+  updateSdrSquelchControlVisibility(): void;
+  updateDocumentTitle(rds: unknown): void;
+  activeChannelRds(): unknown;
+  startRxAudio(): void;
+  stopRxAudio(): void;
+  setRigFrequency(frequencyHz: number): void;
+  syncBandwidthInput(bandwidthHz: number): void;
+  scheduleSpectrumDraw(): void;
+  onDecoderRegistryReady(callback: () => void): void;
+}
+
+interface HostWindow {
+  trx: { state: HostState; core: HostCore };
+}
+
+const host = window as unknown as HostWindow;
+
+export const hostState: HostState = host.trx.state;
+export const hostCore: HostCore = host.trx.core;

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

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+import { hostCore } from "./host.js";
+
 import type { LrptProgress, SatelliteImage, SatelliteLiveUpdate, SatellitePass, SatellitePassResponse } from "./satellite-types";
 import type { PluginRuntimeWindow } from "./runtime-contract.js";
 
@@ -13,7 +15,6 @@ interface SatelliteBridge {
   addSatMapOverlay?: (image: SatelliteImage) => void;
   clearSatMapOverlays?: () => void;
   takeSchedulerControlForDecoderDisable?: (button: HTMLElement) => Promise<unknown>;
-  postPath?: (path: string) => Promise<unknown>;
   trxUi: { confirm(options: { title: string; message: string; confirmLabel: string }): Promise<boolean> };
   satShowOnMap?: (south: number, west: number, north: number, east: number) => void;
   enableMapSourceFilter?: (source: string) => void;
@@ -305,7 +306,7 @@ const lrptDecodeToggleBtn = document.getElementById("lrpt-decode-toggle-btn");
 lrptDecodeToggleBtn?.addEventListener("click", () => { void (async () => {
   try {
     await satWindow.takeSchedulerControlForDecoderDisable?.(lrptDecodeToggleBtn);
-    await satWindow.postPath?.("/toggle_lrpt_decode");
+    await hostCore.postPath("/toggle_lrpt_decode");
   } catch (e) {
     console.error("LRPT toggle failed", e);
   }
@@ -327,7 +328,7 @@ document
   ?.addEventListener("click", () => { void (async () => {
   if (!await satWindow.trxUi.confirm({ title: "Clear satellite history?", message: "All stored satellite decodes will be permanently removed.", confirmLabel: "Clear history" })) return;
     try {
-      await satWindow.postPath?.("/clear_lrpt_decode");
+      await hostCore.postPath("/clear_lrpt_decode");
       resetSatHistoryView();
     } catch (e) {
       console.error("Weather satellite history clear failed", e);

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/plugins/scheduler-types.ts

@@ -80,9 +80,5 @@ export interface SchedulerWindow {
     confirm(options: { title: string; message: string; confirmLabel: string; danger?: boolean }): Promise<boolean>;
     notify?(message: string, options: { kind: "error" }): void;
   };
-  authRole?: string | null;
-  lastActiveRigId?: string | null;
-  serverLat?: number | null;
-  serverLon?: number | null;
   satScheduler?: SatelliteSchedulerApi;
 }

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

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+import { hostState } from "./host.js";
+
 import type {
   ScheduleEntry,
   SchedulerBookmark,
@@ -27,6 +29,12 @@ function schedulerEl(id: string): SchedulerElement {
   return element as SchedulerElement;
 }
 
+/* The timeline needle group is drawn by this feature's own SVG markup, so it is
+ * absent until the timeline has rendered at least once. */
+function schedulerOptionalEl(id: string): SchedulerElement | null {
+  return document.getElementById(id) as SchedulerElement | null;
+}
+
 // Background Decoding Scheduler UI
 
 (function () {
@@ -481,8 +489,8 @@ function schedulerEl(id: string): SchedulerElement {
     if (mode === "grayline" && currentConfig && currentConfig.grayline) {
       const gl = currentConfig.grayline;
       // Prefer saved value; fall back to server coordinates from app.js globals.
-      const lat = gl.lat ?? schedulerWindow.serverLat ?? "";
-      const lon = gl.lon ?? schedulerWindow.serverLon ?? "";
+      const lat = gl.lat ?? hostState.serverLat ?? "";
+      const lon = gl.lon ?? hostState.serverLon ?? "";
       setInputValue("scheduler-gl-lat", lat != null ? lat : "");
       setInputValue("scheduler-gl-lon", lon != null ? lon : "");
       const gridEl = schedulerEl("scheduler-gl-grid");
@@ -496,8 +504,8 @@ function schedulerEl(id: string): SchedulerElement {
       renderBookmarkSelect("scheduler-gl-night", gl.night_bookmark_id);
     } else if (mode === "grayline") {
       // No saved grayline config yet — pre-fill coords from server if available.
-      const lat = schedulerWindow.serverLat ?? "";
-      const lon = schedulerWindow.serverLon ?? "";
+      const lat = hostState.serverLat ?? "";
+      const lon = hostState.serverLon ?? "";
       setInputValue("scheduler-gl-lat", lat != null ? lat : "");
       setInputValue("scheduler-gl-lon", lon != null ? lon : "");
       const gridEl2 = schedulerEl("scheduler-gl-grid");
@@ -821,7 +829,7 @@ function schedulerEl(id: string): SchedulerElement {
   }
 
   function renderTimelineNeedle() {
-    const g = schedulerEl("sch-timeline-needle-g");
+    const g = schedulerOptionalEl("sch-timeline-needle-g");
     if (g) g.innerHTML = timelineNeedleSvg();
   }
 
@@ -1566,8 +1574,8 @@ function schedulerEl(id: string): SchedulerElement {
   // When loaded eagerly, initSettingsUI() in app.js calls initScheduler();
   // when loaded lazily (e.g. settings tab click after boot), the app has
   // already passed that point, so we must self-initialize here.
-  if (schedulerWindow.authRole != null) {
-    initScheduler(schedulerWindow.lastActiveRigId ?? null, schedulerWindow.authRole);
+  if (hostState.authRole != null) {
+    initScheduler(hostState.lastActiveRigId, hostState.authRole);
     wireSchedulerEvents();
   }
 })();

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

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+import { hostCore, hostState } from "./host.js";
+
 export {};
 
 interface VirtualChannel {
@@ -21,40 +23,13 @@ interface SchedulerReleaseState {
   all_released?: boolean;
   current_session_released?: boolean;
 }
-interface SpectrumSnapshot { sample_rate: number; center_hz: number }
+// Callbacks the application publishes as documented transitional window
+// properties; all other application state and services arrive through the
+// typed host contract in ./host.ts.
 interface VirtualChannelBridge {
-  lastActiveRigId?: string | null;
-  lastFreqHz?: number;
-  lastModeName?: string;
-  lastSpectrumData?: SpectrumSnapshot | null;
-  currentBandwidthHz?: number;
-  jogUnit?: number;
-  rxActive?: boolean;
-  _audioChannelOverride?: string | null;
   renderRdsOverlays?: () => void;
-  updateDocumentTitle?: (rds: unknown) => void;
-  activeChannelRds?: () => unknown;
-  stopRxAudio?: () => void;
-  startRxAudio?: () => void;
-  formatFreqForStep?: (frequencyHz: number, jogUnit: number) => string;
-  setJogDivisor?: (divisor: number) => void;
-  resetRdsDisplay?: () => void;
-  updateWfmControls?: () => void;
-  updateSdrSquelchControlVisibility?: () => void;
   refreshRdsUi?: () => void;
-  positionRdsPsOverlay?: () => void;
-  mwDefaultsForMode?: (mode: string) => [number, ...unknown[]];
-  showHint?: (message: string, durationMs: number) => void;
-  refreshFreqDisplay?: () => void;
-  trx?: {
-    core?: VirtualChannelCoreServices;
-    modules?: { vchan?: VirtualChannelService };
-  };
-}
-
-interface VirtualChannelCoreServices {
-  applyLocalTunedFrequency(frequencyHz: number, forceDisplay?: boolean): void;
-  armOptimisticFrequency(frequencyHz: number): void;
+  trx?: { modules?: { vchan?: VirtualChannelService } };
 }
 
 interface VirtualChannelService {
@@ -68,6 +43,7 @@ interface VirtualChannelService {
   interceptMode(mode: string): Promise<boolean>;
   interceptBandwidth(bandwidthHz: number): Promise<boolean>;
   interceptFrequency(frequencyHz: number): boolean;
+  interceptFreqDisplay(): boolean;
   takeSchedulerControl(): Promise<void>;
   releaseToScheduler(): Promise<void>;
 }
@@ -151,7 +127,7 @@ function vchanStartSchedulerReleasePolling() {
 
 async function vchanToggleSchedulerRelease() {
   if (!vchanSessionId) return;
-  const rigId = vchanRigId || vchanWindow.lastActiveRigId || null;
+  const rigId = vchanRigId || hostState.lastActiveRigId || null;
   try {
     const resp = await fetch("/scheduler-control", {
       method: "PUT",
@@ -266,9 +242,7 @@ function vchanRender() {
   picker.appendChild(addBtn);
 
   vchanSyncAccentUI();
-  if (vchanWindow.updateDocumentTitle && vchanWindow.activeChannelRds) {
-    vchanWindow.updateDocumentTitle(vchanWindow.activeChannelRds());
-  }
+  hostCore.updateDocumentTitle(hostCore.activeChannelRds());
   vchanRenderSchedulerRelease();
 }
 
@@ -276,8 +250,8 @@ async function vchanAllocate() {
   if (!vchanSessionId || !vchanRigId) return;
 
   // Use the last known rig frequency and mode as the starting point.
-  const freqHz = (typeof vchanWindow.lastFreqHz === "number" && vchanWindow.lastFreqHz > 0)
-    ? vchanWindow.lastFreqHz
+  const freqHz = (typeof hostState.lastFreqHz === "number" && hostState.lastFreqHz > 0)
+    ? hostState.lastFreqHz
     : 0;
   const modeEl = document.getElementById("mode") as HTMLSelectElement | null;
   const mode = modeEl ? (modeEl.value || "USB") : "USB";
@@ -379,14 +353,14 @@ function vchanReconnectAudio(): void {
   // Always update the override so startRxAudio picks up the right URL,
   // even when audio isn't currently running.
   const ch = vchanIsOnVirtual() ? vchanActiveChannel() : null;
-  vchanWindow._audioChannelOverride = ch?.id ?? null;
-  if (!vchanWindow.rxActive) return;
-  vchanWindow.stopRxAudio?.();
+  hostState.audioChannelOverride = ch?.id ?? null;
+  if (!hostState.rxActive) return;
+  hostCore.stopRxAudio();
   // Delay so the server has time to set up the per-channel encoder.
   // The server-side audio_ws handler also polls for up to 2 s, so this
   // just needs to be long enough for the WS upgrade to reach the server.
   setTimeout(() => {
-    vchanWindow.startRxAudio?.();
+    hostCore.startRxAudio();
   }, 300);
 }
 
@@ -419,11 +393,7 @@ function vchanUpdateFreqDisplay() {
   if (!ch) return;
   const el = document.getElementById("freq") as HTMLInputElement | null;
   if (!el) return;
-  if (vchanWindow.formatFreqForStep && typeof vchanWindow.jogUnit === "number") {
-    el.value = vchanWindow.formatFreqForStep(ch.freq_hz, vchanWindow.jogUnit);
-  } else {
-    el.value = (ch.freq_hz / 1e6).toFixed(6).replace(/\.?0+$/, "");
-  }
+  el.value = hostCore.formatFreqForStep(ch.freq_hz, hostState.jogUnit);
 }
 
 // Sync the mode picker to the active virtual channel's mode.
@@ -437,21 +407,21 @@ function vchanSyncModeDisplay() {
   }
   // When on primary channel, app.js rig-state updates handle the picker.
   const modeUpper = (modeEl.value || "").toUpperCase();
-  if (typeof vchanWindow.lastModeName === "string") {
-    if (modeUpper === "WFM" && vchanWindow.lastModeName !== "WFM") {
-      vchanWindow.setJogDivisor?.(10);
-      vchanWindow.resetRdsDisplay?.();
-    } else if (modeUpper !== "WFM" && vchanWindow.lastModeName === "WFM") {
-      vchanWindow.resetRdsDisplay?.();
+  if (typeof hostState.lastModeName === "string") {
+    if (modeUpper === "WFM" && hostState.lastModeName !== "WFM") {
+      hostCore.setJogDivisor(10);
+      hostCore.resetRdsDisplay();
+    } else if (modeUpper !== "WFM" && hostState.lastModeName === "WFM") {
+      hostCore.resetRdsDisplay();
     }
-    vchanWindow.lastModeName = modeUpper;
+    hostState.lastModeName = modeUpper;
   }
-  vchanWindow.updateWfmControls?.();
-  vchanWindow.updateSdrSquelchControlVisibility?.();
+  hostCore.updateWfmControls();
+  hostCore.updateSdrSquelchControlVisibility();
   if (vchanWindow.refreshRdsUi) {
     vchanWindow.refreshRdsUi();
   } else {
-    vchanWindow.positionRdsPsOverlay?.();
+    hostCore.positionRdsPsOverlay();
   }
 }
 
@@ -464,12 +434,12 @@ function vchanSyncBwDisplay() {
   if (!bwEl) return;
   // bandwidth_hz == 0 means mode-default; derive it from the channel mode.
   let bwHz = ch.bandwidth_hz || 0;
-  if (bwHz === 0 && vchanWindow.mwDefaultsForMode) {
-    bwHz = vchanWindow.mwDefaultsForMode(ch.mode)[0] || 0;
+  if (bwHz === 0) {
+    bwHz = hostCore.mwDefaultsForMode(ch.mode)[0] || 0;
   }
   if (bwHz > 0) {
     bwEl.value = (bwHz / 1000).toFixed(3).replace(/\.?0+$/, "");
-    vchanWindow.currentBandwidthHz = bwHz;
+    hostState.currentBandwidthHz = bwHz;
   }
 }
 
@@ -485,29 +455,22 @@ function vchanSyncAccentUI() {
     vchanSyncModeDisplay();
     vchanSyncBwDisplay();
   } else {
-    origRefreshFreqDisplay?.();
-  }
-  if (vchanWindow.updateDocumentTitle && vchanWindow.activeChannelRds) {
-    vchanWindow.updateDocumentTitle(vchanWindow.activeChannelRds());
+    hostCore.refreshFreqDisplay();
   }
+  hostCore.updateDocumentTitle(hostCore.activeChannelRds());
 }
 
-// Saved reference to the original refreshFreqDisplay from app.js.
-let origRefreshFreqDisplay: (() => void) | null = null;
-
 function vchanSetChannelFreq(freqHz: number): void {
   if (!vchanRigId || !vchanActiveId) return;
   // Validate against current SDR capture window.
-  if (vchanWindow.lastSpectrumData && vchanWindow.lastSpectrumData.sample_rate > 0) {
-    const halfSpan = vchanWindow.lastSpectrumData.sample_rate / 2;
-    const center = vchanWindow.lastSpectrumData.center_hz;
+  if (hostState.lastSpectrumData && hostState.lastSpectrumData.sample_rate > 0) {
+    const halfSpan = hostState.lastSpectrumData.sample_rate / 2;
+    const center = hostState.lastSpectrumData.center_hz;
     if (Math.abs(freqHz - center) > halfSpan) {
-      if (vchanWindow.showHint) {
-        vchanWindow.showHint(
-          `Out of SDR bandwidth (center ${(center / 1e6).toFixed(3)} MHz ±${(halfSpan / 1e3).toFixed(0)} kHz)`,
-          3000
-        );
-      }
+      hostCore.showHint(
+        `Out of SDR bandwidth (center ${(center / 1e6).toFixed(3)} MHz ±${(halfSpan / 1e3).toFixed(0)} kHz)`,
+        3000
+      );
       return;
     }
   }
@@ -581,14 +544,21 @@ async function vchanInterceptBandwidth(bwHz: number): Promise<boolean> {
 // so this applies the optimistic local update and reports the tune as handled.
 function vchanInterceptFrequency(freqHz: number): boolean {
   if (!vchanIsOnVirtual()) return false;
-  const core = vchanWindow.trx?.core;
   const targetHz = Math.round(freqHz);
-  core?.armOptimisticFrequency(targetHz);
-  core?.applyLocalTunedFrequency(targetHz);
+  hostCore.armOptimisticFrequency(targetHz);
+  hostCore.applyLocalTunedFrequency(targetHz);
   vchanSetChannelFreq(freqHz);
   return true;
 }
 
+// Called by the application's refreshFreqDisplay.  While a virtual channel is
+// active the field belongs to that channel, so report the render as handled.
+function vchanInterceptFreqDisplay(): boolean {
+  if (!vchanIsOnVirtual()) return false;
+  vchanUpdateFreqDisplay();
+  return true;
+}
+
 vchanWindow.trx ??= {};
 vchanWindow.trx.modules ??= {};
 vchanWindow.trx.modules.vchan = {
@@ -602,6 +572,7 @@ vchanWindow.trx.modules.vchan = {
   interceptMode: vchanInterceptMode,
   interceptBandwidth: vchanInterceptBandwidth,
   interceptFrequency: vchanInterceptFrequency,
+  interceptFreqDisplay: vchanInterceptFreqDisplay,
   takeSchedulerControl: vchanTakeSchedulerControl,
   releaseToScheduler: vchanToggleSchedulerRelease,
 };
@@ -617,16 +588,3 @@ vchanWindow.trx.modules.vchan = {
   vchanRenderSchedulerRelease();
 })();
 
-// Wrap refreshFreqDisplay so the main freq field stays in sync with the
-// active virtual channel's frequency (SSE rig-state updates would otherwise
-// constantly overwrite it with channel 0's freq).
-(function() {
-  origRefreshFreqDisplay = vchanWindow.refreshFreqDisplay ?? null;
-  vchanWindow.refreshFreqDisplay = function() {
-    if (vchanIsOnVirtual()) {
-      vchanUpdateFreqDisplay();
-      return;
-    }
-    origRefreshFreqDisplay?.();
-  };
-})();

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

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+import { hostCore } from "./host.js";
+
 export {};
 
 import type { PluginRuntimeWindow } from "./runtime-contract";
@@ -38,8 +40,6 @@ interface VdesMessage {
 interface VdesBridge {
   getDecodeHistoryRetentionMs?: () => number;
   trxScheduleUiFrameJob?: (key: string, job: () => void) => void;
-  escapeMapHtml?: (input: string) => string;
-  postPath?: (path: string) => Promise<unknown>;
   trxUi: { confirm(options: { title: string; message: string; confirmLabel: string }): Promise<boolean> };
   vdesMapAddPoint?: (message: VdesMessage) => void;
   updateVdesBar?: () => void;
@@ -47,9 +47,7 @@ interface VdesBridge {
 }
 
 const vdesWindow = window as unknown as VdesBridge;
-const escapeVdesHtml = (input: string): string => vdesWindow.escapeMapHtml?.(input) ?? input
-  .replaceAll("&", "&amp;").replaceAll("<", "&lt;")
-  .replaceAll(">", "&gt;").replaceAll('"', "&quot;");
+const escapeVdesHtml = (input: string): string => hostCore.escapeMapHtml(input);
 
 // --- VDES Decoder Plugin (server-side decode) ---
 const vdesStatus = document.getElementById("vdes-status");
@@ -337,7 +335,7 @@ function onServerVdesBatch(messages: VdesMessage[]): void {
 document.getElementById("settings-clear-vdes-history")?.addEventListener("click", () => { void (async () => {
   if (!await vdesWindow.trxUi.confirm({ title: "Clear VDES history?", message: "All stored VDES decodes will be permanently removed.", confirmLabel: "Clear history" })) return;
   try {
-    await vdesWindow.postPath?.("/clear_vdes_decode");
+    await hostCore.postPath("/clear_vdes_decode");
     resetVdesHistoryView();
   } catch (e) {
     console.error("VDES history clear failed", e);

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

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+import { hostCore } from "./host.js";
+
 import type { PluginRuntimeWindow } from "./runtime-contract.js";
 
 export {};
@@ -29,7 +31,6 @@ interface WefaxProgress {
 interface WefaxBridge {
   getDecodeHistoryRetentionMs?: () => number;
   trxScheduleUiFrameJob?: (key: string, job: () => void) => void;
-  postPath?: (path: string) => Promise<unknown>;
   takeSchedulerControlForDecoderDisable?: (button: HTMLElement) => Promise<unknown>;
   syncWefaxToggle?: (enabled: boolean) => void;
 }
@@ -411,7 +412,7 @@ if (wefaxDom.toggleBtn) {
       if (wefaxWindow.takeSchedulerControlForDecoderDisable) {
         await wefaxWindow.takeSchedulerControlForDecoderDisable(toggleButton);
       }
-      await wefaxWindow.postPath?.('/toggle_wefax_decode');
+      await hostCore.postPath('/toggle_wefax_decode');
     } catch (e) {
       console.error('WEFAX toggle failed', e);
     }
@@ -420,7 +421,7 @@ if (wefaxDom.toggleBtn) {
 if (wefaxDom.clearBtn) {
   wefaxDom.clearBtn.addEventListener('click', () => { void (async () => {
     try {
-      await wefaxWindow.postPath?.('/clear_wefax_decode');
+      await hostCore.postPath('/clear_wefax_decode');
       resetWefaxHistoryView();
     } catch (e) {
       console.error('WEFAX clear failed', e);

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

@@ -2,6 +2,8 @@
 //
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+import { hostCore } from "./host.js";
+
 import type { PluginRuntimeWindow } from "./runtime-contract.js";
 
 export {};
@@ -25,7 +27,6 @@ interface WsprBridge {
   navigateToMapLocator?: (grid: string, type: "wspr") => void;
   clearMapMarkersByType?: (type: "wspr") => void;
   takeSchedulerControlForDecoderDisable?: (button: HTMLElement) => Promise<void>;
-  postPath?: (path: string) => Promise<unknown>;
   trxUi: { confirm(options: { title: string; message: string; confirmLabel: string }): Promise<boolean> };
   [key: string]: unknown;
 }
@@ -291,7 +292,7 @@ wsprDecodeToggleBtn?.addEventListener("click", () => {
   void (async () => {
     try {
       await wsprWindow.takeSchedulerControlForDecoderDisable?.(wsprDecodeToggleBtn);
-      await wsprWindow.postPath?.("/toggle_wspr_decode");
+      await hostCore.postPath("/toggle_wspr_decode");
     } catch (error: unknown) {
       console.error("WSPR toggle failed", error);
     }
@@ -302,7 +303,7 @@ document.getElementById("settings-clear-wspr-history")?.addEventListener("click"
   void (async () => {
     if (!await wsprWindow.trxUi.confirm({ title: "Clear WSPR history?", message: "All stored WSPR decodes will be permanently removed.", confirmLabel: "Clear history" })) return;
     try {
-      await wsprWindow.postPath?.("/clear_wspr_decode");
+      await hostCore.postPath("/clear_wspr_decode");
       resetWsprHistoryView();
     } catch (error: unknown) {
       console.error("WSPR history clear failed", error);

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/ais.test.mjs

@@ -3,14 +3,15 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 import assert from "node:assert/strict";
-import { readFile } from "node:fs/promises";
 import test from "node:test";
 import vm from "node:vm";
 import { bundleEntry } from "./bundle-entry.mjs";
+import { createHost } from "./host-fixture.mjs";
 
 test("AIS entry forwards positioned vessels with normalized metadata", async () => {
   const forwarded = [];
   const window = {
+    ...createHost(),
     trxUi: { confirm: async () => true },
     aisMapAddVessel: (message) => { forwarded.push(message); },
   };
@@ -25,7 +26,7 @@ test("AIS entry forwards positioned vessels with normalized metadata", async ()
     console,
   });
   const runtime = await bundleEntry(new URL("../src/plugin-runtime.ts", import.meta.url));
-  const source = await readFile(new URL("../../assets/web/generated/ais.js", import.meta.url), "utf8");
+  const source = await bundleEntry(new URL("../src/plugins/ais.ts", import.meta.url));
   new vm.Script(runtime).runInContext(context);
   new vm.Script(source).runInContext(context);
 

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/aprs.test.mjs

@@ -6,10 +6,12 @@ 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";
 
 test("APRS entry normalizes positioned packets without remote symbol assets", async () => {
   const forwarded = [];
   const window = {
+    ...createHost(),
     trxUi: { confirm: async () => true },
     aprsMapAddStation: (...args) => { forwarded.push(args); },
   };
@@ -38,3 +40,49 @@ test("APRS entry normalizes positioned packets without remote symbol assets", as
   assert.equal(forwarded[0][1], 54.5);
   assert.equal(forwarded[0][6].rig_id, null);
 });
+
+// Distance is computed from the receiver position and the great-circle helper,
+// both of which the entry reads through the host contract.  These used to be
+// bare window properties that the module graph stopped publishing, so the
+// distance column rendered empty for every positioned packet.
+test("APRS distance text uses the receiver position from the host contract", async () => {
+  const distanceArgs = [];
+  const host = createHost({
+    state: { serverLat: 54.0, serverLon: 18.0 },
+    core: {
+      haversineKm: (lat1, lon1, lat2, lon2) => {
+        distanceArgs.push([lat1, lon1, lat2, lon2]);
+        return 61.7;
+      },
+    },
+  });
+  const window = { ...host, trxUi: { confirm: async () => true }, aprsMapAddStation: () => {} };
+  const node = () => ({
+    innerHTML: "", textContent: "", className: "", style: {}, dataset: {},
+    appendChild(child) { return child; }, addEventListener() {}, replaceChildren() {},
+    querySelector: () => null, querySelectorAll: () => [], setAttribute() {},
+    classList: { add() {}, toggle() {} },
+  });
+  const context = vm.createContext({
+    window,
+    document: {
+      getElementById: (id) => (id === "aprs-packets" ? node() : null),
+      querySelectorAll: () => [],
+      createElement: node,
+      createDocumentFragment: node,
+    },
+    navigator: {},
+    Date, Number, String, Array, Set, Reflect, console,
+  });
+  const runtime = await bundleEntry(new URL("../src/plugin-runtime.ts", import.meta.url));
+  const source = await bundleEntry(new URL("../src/plugins/aprs.ts", import.meta.url));
+  new vm.Script(runtime).runInContext(context);
+  new vm.Script(source).runInContext(context);
+
+  window.trxPluginRuntime.dispatch("aprs", {
+    src_call: "SP0ABC", dest_call: "APRS", crc_ok: true, lat: 54.5, lon: 18.5,
+    symbol_table: "/", symbol_code: ">",
+  });
+
+  assert.deepEqual(distanceArgs, [[54.0, 18.0, 54.5, 18.5]]);
+});

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

@@ -3,13 +3,15 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 import assert from "node:assert/strict";
-import { readFile } from "node:fs/promises";
 import test from "node:test";
 import vm from "node:vm";
+import { createHost } from "./host-fixture.mjs";
+import { bundleEntry } from "./bundle-entry.mjs";
 
 test("background decode loads configuration for the explicitly selected rig", async () => {
   const requested = [];
   const window = {
+    ...createHost(),
     decoderRegistry: [],
     trxUi: { confirm: async () => true },
   };
@@ -35,7 +37,7 @@ test("background decode loads configuration for the explicitly selected rig", as
     Error,
     console,
   });
-  const source = await readFile(new URL("../../assets/web/generated/background-decode.js", import.meta.url), "utf8");
+  const source = await bundleEntry(new URL("../src/plugins/background-decode.ts", import.meta.url));
   new vm.Script(source).runInContext(context);
 
   window.trx.modules.backgroundDecode.initialize("rig/a", "control");

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/bookmarks.test.mjs

@@ -3,9 +3,9 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 import assert from "node:assert/strict";
-import { readFile } from "node:fs/promises";
 import test from "node:test";
 import vm from "node:vm";
+import { bundleEntry } from "./bundle-entry.mjs";
 
 class ElementFixture {
   constructor() {
@@ -66,7 +66,7 @@ function documentFixture(element) {
   };
 }
 
-const source = await readFile(new URL("../../assets/web/generated/bookmarks.js", import.meta.url), "utf8");
+const source = await bundleEntry(new URL("../src/plugins/bookmarks.ts", import.meta.url));
 
 test("bookmarks register an explicit typed service for application consumers", async () => {
   const elements = new Map();

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/cw.test.mjs

@@ -3,10 +3,10 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 import assert from "node:assert/strict";
-import { readFile } from "node:fs/promises";
 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() { this.children = []; this.textContent = ""; this.style = {}; this.classList = { toggle() {} }; }
@@ -21,7 +21,7 @@ test("CW entry appends server-decoded text and registers lifecycle callbacks", a
   const output = new ElementFixture();
   const status = new ElementFixture();
   const elements = new Map([["cw-output", output], ["cw-status", status]]);
-  const window = { trxUi: { confirm: async () => true }, addEventListener() {} };
+  const window = { ...createHost(), trxUi: { confirm: async () => true }, addEventListener() {} };
   const context = vm.createContext({
     window,
     document: {
@@ -39,7 +39,7 @@ test("CW entry appends server-decoded text and registers lifecycle callbacks", a
     console,
   });
   const runtime = await bundleEntry(new URL("../src/plugin-runtime.ts", import.meta.url));
-  const source = await readFile(new URL("../../assets/web/generated/cw.js", import.meta.url), "utf8");
+  const source = await bundleEntry(new URL("../src/plugins/cw.ts", import.meta.url));
   new vm.Script(runtime).runInContext(context);
   new vm.Script(source).runInContext(context);
 

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/ftx-family.test.mjs

@@ -6,11 +6,13 @@ 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";
 
 test("FT2 entry normalizes audio offsets and registers typed callbacks", async () => {
   let barRenderer;
   const mapMessages = [];
   const window = {
+    ...createHost(),
     ft8BaseHz: 14_074_000,
     trxUi: { confirm: async () => true },
     ft8ExtractAllGrids: () => ["JO91"],
@@ -46,6 +48,7 @@ test("FT2 entry normalizes audio offsets and registers typed callbacks", async (
 test("FT8 entry installs shared parsing without relying on script globals", async () => {
   const forwarded = [];
   const window = {
+    ...createHost(),
     ft8BaseHz: 7_074_000,
     trxUi: { confirm: async () => true },
     mapAddLocator: (...args) => { forwarded.push(args); },

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/hf-aprs.test.mjs

@@ -6,9 +6,10 @@ 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";
 
 test("HF APRS entry uses shared typed normalization and local symbols", async () => {
-  const window = { trxUi: { confirm: async () => true } };
+  const window = { ...createHost(), trxUi: { confirm: async () => true } };
   const context = vm.createContext({
     window,
     document: { getElementById: () => null, querySelectorAll: () => [] },

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

@@ -0,0 +1,66 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+// Mirrors the `window.trx` host contract that app.ts publishes and that
+// src/plugins/host.ts consumes.  Feature bundles read all application state
+// and services through it, so every plugin test needs it on its stub window.
+
+export function createHost({ state = {}, core = {}, modules = {} } = {}) {
+  const calls = [];
+  const record = (name, result) => (...args) => {
+    calls.push({ name, args });
+    return typeof result === "function" ? result(...args) : result;
+  };
+  return {
+    calls,
+    trx: {
+      state: {
+        serverLat: null,
+        serverLon: null,
+        authEnabled: false,
+        authRole: "control",
+        lastActiveRigId: null,
+        lastRigIds: [],
+        lastRigDisplayNames: {},
+        lastFreqHz: null,
+        lastSpectrumData: null,
+        jogUnit: 1000,
+        rxActive: false,
+        decoderRegistry: [],
+        lastModeName: "",
+        currentBandwidthHz: 2400,
+        audioChannelOverride: null,
+        ...state,
+      },
+      core: {
+        postPath: record("postPath", async () => undefined),
+        applyLocalTunedFrequency: record("applyLocalTunedFrequency"),
+        armOptimisticFrequency: record("armOptimisticFrequency"),
+        escapeMapHtml: (value) => String(value)
+          .replaceAll("&", "&amp;").replaceAll("<", "&lt;")
+          .replaceAll(">", "&gt;").replaceAll('"', "&quot;"),
+        haversineKm: record("haversineKm", () => 0),
+        showHint: record("showHint"),
+        formatFreqForStep: (hz) => String(hz),
+        refreshFreqDisplay: record("refreshFreqDisplay"),
+        setJogDivisor: record("setJogDivisor"),
+        mwDefaultsForMode: record("mwDefaultsForMode", () => [0, 0, 0, 0]),
+        resetRdsDisplay: record("resetRdsDisplay"),
+        positionRdsPsOverlay: record("positionRdsPsOverlay"),
+        updateWfmControls: record("updateWfmControls"),
+        updateSdrSquelchControlVisibility: record("updateSdrSquelchControlVisibility"),
+        updateDocumentTitle: record("updateDocumentTitle"),
+        activeChannelRds: record("activeChannelRds", () => null),
+        startRxAudio: record("startRxAudio"),
+        stopRxAudio: record("stopRxAudio"),
+        setRigFrequency: record("setRigFrequency"),
+        syncBandwidthInput: record("syncBandwidthInput"),
+        scheduleSpectrumDraw: record("scheduleSpectrumDraw"),
+        onDecoderRegistryReady: record("onDecoderRegistryReady"),
+        ...core,
+      },
+      modules,
+    },
+  };
+}

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/sat.test.mjs

@@ -3,14 +3,15 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 import assert from "node:assert/strict";
-import { readFile } from "node:fs/promises";
 import test from "node:test";
 import vm from "node:vm";
 import { bundleEntry } from "./bundle-entry.mjs";
+import { createHost } from "./host-fixture.mjs";
 
 test("satellite entry registers lifecycle callbacks and forwards georeferenced images", async () => {
   const overlays = [];
   const window = {
+    ...createHost(),
     trxUi: { confirm: async () => true },
     addSatMapOverlay: (image) => { overlays.push(image); },
   };
@@ -28,7 +29,7 @@ test("satellite entry registers lifecycle callbacks and forwards georeferenced i
     console,
   });
   const runtime = await bundleEntry(new URL("../src/plugin-runtime.ts", import.meta.url));
-  const source = await readFile(new URL("../../assets/web/generated/sat.js", import.meta.url), "utf8");
+  const source = await bundleEntry(new URL("../src/plugins/sat.ts", import.meta.url));
   new vm.Script(runtime).runInContext(context);
   new vm.Script(source).runInContext(context);
 

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/scheduler.test.mjs

@@ -3,12 +3,15 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 import assert from "node:assert/strict";
-import { readFile } from "node:fs/promises";
 import test from "node:test";
 import vm from "node:vm";
+import { createHost } from "./host-fixture.mjs";
+import { bundleEntry } from "./bundle-entry.mjs";
 
 test("scheduler registers a typed module service without lifecycle globals", async () => {
-  const window = { trx: { modules: {} }, trxUi: { confirm: async () => true } };
+  // No role known yet: the entry registers its service and waits for the
+  // application to drive initialization.
+  const window = { ...createHost({ state: { authRole: null } }), trxUi: { confirm: async () => true } };
   const context = vm.createContext({
     window,
     document: {
@@ -31,7 +34,7 @@ test("scheduler registers a typed module service without lifecycle globals", asy
     WeakSet,
     console,
   });
-  const source = await readFile(new URL("../../assets/web/generated/scheduler.js", import.meta.url), "utf8");
+  const source = await bundleEntry(new URL("../src/plugins/scheduler.ts", import.meta.url));
   new vm.Script(source).runInContext(context);
 
   const service = window.trx.modules.scheduler;
@@ -41,3 +44,70 @@ test("scheduler registers a typed module service without lifecycle globals", asy
   assert.equal(window.initScheduler, undefined);
   assert.equal(window.schedulerBridge, undefined);
 });
+
+// Lazy-load case: the settings tab is opened after boot, so the application has
+// already passed initSettingsUI() and the entry must initialize itself from the
+// host state.  This read used to come from a bare window property that the
+// module graph stopped publishing, so the scheduler never started.
+test("scheduler self-initializes for the active rig when a role is already known", async () => {
+  class ElementFixture {
+    constructor() {
+      this.value = "";
+      this.textContent = "";
+      this.innerHTML = "";
+      this.style = {};
+      this.dataset = {};
+      this.options = [];
+      this.classList = { add() {}, remove() {}, toggle() {}, contains: () => false };
+      this.children = [];
+    }
+    addEventListener() {}
+    appendChild(child) { this.children.push(child); return child; }
+    remove() {}
+    focus() {}
+    closest() { return null; }
+    querySelector() { return null; }
+    querySelectorAll() { return []; }
+  }
+  const elements = new Map();
+  const fetched = [];
+  const element = (id) => {
+    if (!elements.has(id)) elements.set(id, new ElementFixture());
+    return elements.get(id);
+  };
+  const window = {
+    ...createHost({ state: { authRole: "control", lastActiveRigId: "sdr" } }),
+    trxUi: { confirm: async () => true },
+  };
+  const context = vm.createContext({
+    window,
+    document: {
+      activeElement: null,
+      addEventListener() {},
+      getElementById: element,
+      querySelector: () => new ElementFixture(),
+      querySelectorAll: () => [],
+      createElement: () => new ElementFixture(),
+    },
+    localStorage: { getItem: () => null, setItem() {} },
+    fetch: async (url) => { fetched.push(String(url)); return { ok: true, json: async () => ({}) }; },
+    setInterval: () => 1,
+    clearInterval() {},
+    setTimeout: () => 1,
+    HTMLElement: ElementFixture,
+    Element: ElementFixture,
+    Date,
+    Number,
+    String,
+    Array,
+    Promise,
+    WeakSet,
+    console,
+  });
+  const source = await bundleEntry(new URL("../src/plugins/scheduler.ts", import.meta.url));
+  new vm.Script(source).runInContext(context);
+  await new Promise((resolve) => setImmediate(resolve));
+
+  assert.ok(fetched.some((url) => url.includes("scheduler") && url.includes("sdr")),
+    `expected a scheduler load for the active rig, saw ${JSON.stringify(fetched)}`);
+});

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/vchan.test.mjs

@@ -3,12 +3,13 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 import assert from "node:assert/strict";
-import { readFile } from "node:fs/promises";
 import test from "node:test";
 import vm from "node:vm";
+import { createHost } from "./host-fixture.mjs";
+import { bundleEntry } from "./bundle-entry.mjs";
 
 test("virtual channels expose typed SSE and interception boundaries", async () => {
-  const window = {};
+  const window = { ...createHost() };
   const context = vm.createContext({
     window,
     document: { getElementById: () => null },
@@ -25,7 +26,7 @@ test("virtual channels expose typed SSE and interception boundaries", async () =
     Error,
     console,
   });
-  const source = await readFile(new URL("../../assets/web/generated/vchan.js", import.meta.url), "utf8");
+  const source = await bundleEntry(new URL("../src/plugins/vchan.ts", import.meta.url));
   new vm.Script(source).runInContext(context);
 
   const service = window.trx.modules.vchan;

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/vdes.test.mjs

@@ -3,14 +3,15 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 import assert from "node:assert/strict";
-import { readFile } from "node:fs/promises";
 import test from "node:test";
 import vm from "node:vm";
 import { bundleEntry } from "./bundle-entry.mjs";
+import { createHost } from "./host-fixture.mjs";
 
 test("VDES entry normalizes and forwards positioned server messages", async () => {
   const forwarded = [];
   const window = {
+    ...createHost(),
     trxUi: { confirm: async () => true },
     vdesMapAddPoint: (message) => { forwarded.push(message); },
   };
@@ -24,7 +25,7 @@ test("VDES entry normalizes and forwards positioned server messages", async () =
     console,
   });
   const runtime = await bundleEntry(new URL("../src/plugin-runtime.ts", import.meta.url));
-  const source = await readFile(new URL("../../assets/web/generated/vdes.js", import.meta.url), "utf8");
+  const source = await bundleEntry(new URL("../src/plugins/vdes.ts", import.meta.url));
   new vm.Script(runtime).runInContext(context);
   new vm.Script(source).runInContext(context);
 

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/wefax.test.mjs

@@ -3,14 +3,14 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 import assert from "node:assert/strict";
-import { readFile } from "node:fs/promises";
 import test from "node:test";
 import vm from "node:vm";
 import { bundleEntry } from "./bundle-entry.mjs";
+import { createHost } from "./host-fixture.mjs";
 
 test("WEFAX entry exposes typed lifecycle handlers and renders decoder state", async () => {
   const status = { textContent: "", style: { color: "" } };
-  const window = {};
+  const window = { ...createHost() };
   const context = vm.createContext({
     window,
     document: { getElementById: (id) => id === "wefax-status" ? status : null },
@@ -21,7 +21,7 @@ test("WEFAX entry exposes typed lifecycle handlers and renders decoder state", a
     console,
   });
   const runtime = await bundleEntry(new URL("../src/plugin-runtime.ts", import.meta.url));
-  const source = await readFile(new URL("../../assets/web/generated/wefax.js", import.meta.url), "utf8");
+  const source = await bundleEntry(new URL("../src/plugins/wefax.ts", import.meta.url));
   new vm.Script(runtime).runInContext(context);
   new vm.Script(source).runInContext(context);
 

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/wspr.test.mjs

@@ -3,14 +3,15 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 import assert from "node:assert/strict";
-import { readFile } from "node:fs/promises";
 import test from "node:test";
 import vm from "node:vm";
 import { bundleEntry } from "./bundle-entry.mjs";
+import { createHost } from "./host-fixture.mjs";
 
 test("WSPR entry forwards decoded locators at their absolute frequency", async () => {
   const forwarded = [];
   const window = {
+    ...createHost(),
     ft8BaseHz: 14_095_600,
     trxUi: { confirm: async () => true },
     mapAddLocator: (...args) => { forwarded.push(args); },
@@ -27,7 +28,7 @@ test("WSPR entry forwards decoded locators at their absolute frequency", async (
     console,
   });
   const runtime = await bundleEntry(new URL("../src/plugin-runtime.ts", import.meta.url));
-  const source = await readFile(new URL("../../assets/web/generated/wspr.js", import.meta.url), "utf8");
+  const source = await bundleEntry(new URL("../src/plugins/wspr.ts", import.meta.url));
   new vm.Script(runtime).runInContext(context);
   new vm.Script(source).runInContext(context);