[fix](trx-server): offload history persistence

The runner image's `reuse` failed to import (NoEncodingModuleError): it
needs an encoding-detection backend, which the bare `reuse` install does
not provide and which libmagic/`file` is not present to satisfy. Install
`reuse[charset-normalizer]` so the reuse job can run in the image.

Rebuild the runner image and recreate the containers to pick this up.

Assisted-By: Claude Code (claude-opus-4)
Claude-Session: https://claude.ai/code/session_01NFpGtGTWUEYXLwZeZs2RAV
Signed-off-by: Stan Grams <sjg@haxx.space>

.gitea/workflows/ci.yml

@@ -0,0 +1,47 @@
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+# CI for the self-hosted, host-executor Podman runners (see container/).
+# The runner image bakes in the Rust toolchain and all build dependencies,
+# so jobs go straight to cargo — no apt/rustup setup steps (which also
+# collided on the dpkg lock when jobs ran concurrently in the same runner).
+
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: rustfmt
+        run: cargo fmt --all -- --check
+      - name: clippy
+        run: cargo clippy --workspace --all-targets --all-features -- -D warnings
+
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build
+        run: cargo build --workspace --all-targets --locked
+      - name: Test
+        run: cargo test --workspace --locked
+
+  reuse:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: REUSE compliance
+        # `reuse` CLI instead of fsfe/reuse-action: the latter is a Docker
+        # action, which the host-executor runners cannot run. `reuse` is baked
+        # into the runner image (see container/Containerfile).
+        run: reuse lint

CONTRIBUTING.md

@@ -18,7 +18,7 @@ When contributing to the project, please follow these guidelines:
 - Use a maximum of 80 characters per line.
 - Use a blank line between the commit message and the body.
 - Sign your commits with `git commit -s`.
-- Explicitly mark LLM usage in commit messages with 'Co-authored-by:'.
+- Disclose AI/LLM assistance with an `Assisted-By:` trailer (see below).
 
 Use the format below for commit titles:
 [<type>](<crate>): <description>
@@ -39,3 +39,23 @@ Allowed types:
 - chore: build or maintenance changes
 
 Write isolated commits for each crate.
+
+## Attribution trailers
+
+This project follows the Linux kernel convention for crediting work.
+
+The `Co-Authored-By:` and `Co-Developed-By:` trailers name **people** who
+authored the change. They are reserved for humans, and every person named
+this way must also add their own `Signed-off-by:` line. Never use these
+trailers for tools, assistants, or bots.
+
+When a commit was produced with help from an AI assistant or LLM,
+disclose it with an `Assisted-By:` trailer naming the tool (and model,
+where relevant). The human committer remains the author of record and
+takes responsibility for the change through `Signed-off-by:`.
+
+Example:
+
+    Assisted-By: Claude Code (claude-opus-4)
+    Co-Authored-By: Jane Developer <jane@example.com>
+    Signed-off-by: Your Name <you@example.com>

REUSE.toml

@@ -11,6 +11,7 @@ path = [
     "README.md",
     "trx-rs.toml.example",
     "docs/**",
+    "aidocs/**",
     "src/decoders/trx-ftx/README.md",
     "src/decoders/trx-wxsat/README.md",
     "assets/trx-logo.png",

aidocs/wip.md

@@ -0,0 +1,89 @@
+# Work In Progress — Project Improvement Areas
+
+Living tracker for engineering-infrastructure and hardening work identified
+during a July 2026 repo scan. The architecture-level backlog
+(`docs/Improvement-Areas.md`, P0–P3) is closed; these items focus on the
+tooling, robustness, and product concerns *around* the code.
+
+Status legend: **Done** · **In progress** · **Not started**
+
+| #  | Tier | Area | Status |
+|----|------|------|--------|
+| 1  | 1 — Infrastructure | Gitea Actions CI (fmt, clippy, test, REUSE) | In progress |
+| 2  | 1 — Infrastructure | Supply-chain & lint governance (cargo-deny/audit, MSRV, `[workspace.lints]`) | Not started |
+| 3  | 1 — Infrastructure | Release & deployment (container image, systemd units, binary releases) | Not started |
+| 4  | 2 — Robustness | Panic-resilience audit (harden ~495 unwrap/expect/panic sites) | Not started |
+| 5  | 2 — Robustness | `unsafe` SIMD safety scaffolding (`# Safety` docs, scalar↔SIMD equivalence tests) | Not started |
+| 6  | 2 — Robustness | DSP performance benchmarks (criterion, guard optimization gains) | Not started |
+| 7  | 2 — Robustness | Test-coverage measurement & gap-filling (llvm-cov; CAT backends, server tasks) | Not started |
+| 8  | 3 — Product | Frontend modularization & tooling (split `app.js` into ES modules, ESLint, JS tests) | Not started |
+| 9  | 3 — Product | Runtime observability (`/health`, Prometheus metrics) | Not started |
+| 10 | 3 — Product | Documentation freshness & consolidation (reconcile `docs/` with code) | Not started |
+
+## Tier 1 — Infrastructure gaps
+
+### 1. Gitea Actions CI
+No `.gitea/` / `.github/` / Woodpecker workflows exist, despite 768 tests.
+Add a workflow running `cargo fmt --check`, `cargo clippy -D warnings`,
+`cargo build`/`cargo test`, and REUSE lint on push + pull_request.
+System deps: `pkg-config cmake libopus-dev libasound2-dev libsoapysdr-dev`
+(the `soapysdr` backend is a default feature).
+
+Notes for the runner: assumes an `act_runner` registered with an
+`ubuntu-latest` label and GitHub-action proxying enabled (used by
+`actions/checkout`, `actions/cache`, `fsfe/reuse-action`). `clippy` runs
+with `-D warnings`; core crates are already clean, but if the first full
+`--all-features` run surfaces warnings in a less-travelled crate, fix them
+(preferred) or temporarily soften that step.
+
+### 2. Supply-chain & lint governance
+No `deny.toml`, `cargo audit`, `rustfmt.toml`/`clippy.toml`, declared MSRV,
+or `[workspace.lints]`. Add dependency auditing to CI, pin an MSRV
+(`rust-version`), and centralize lint policy in the workspace manifest.
+
+### 3. Release & deployment
+No `Dockerfile`, systemd units, packaging, or release automation (only
+`script/dummy-server.sh`). Add a container image, example systemd units for
+`trx-server`/`trx-client`, and a tag-triggered static-binary release job.
+
+## Tier 2 — Robustness & correctness
+
+### 4. Panic-resilience audit
+495 `unwrap()`/`expect()`/`panic!` sites, 11 in the hottest server files
+(`audio.rs`, `rig_task.rs`). A panic there can drop a rig task or the
+process. Convert hot-path panics to error propagation / graceful
+degradation; reserve `expect` for documented invariants.
+
+### 5. `unsafe` SIMD safety scaffolding
+13 `unsafe` blocks (AVX2 DSP). Add `# Safety` docs stating invariants,
+confirm runtime feature detection is tested, and add property tests
+asserting SIMD output matches the scalar fallback across random inputs.
+
+### 6. DSP performance benchmarks
+`docs/Optimization-Guidelines.md` documents NCO/polyphase/AVX2 gains, but no
+`criterion` benches guard them. Add benches for the demod/resample/FFT hot
+paths so regressions surface as numbers.
+
+### 7. Test-coverage measurement & gap-filling
+67 of 146 Rust files have no test module. Protocol is well covered; backends
+(CAT BCD/ASCII encoding), `listener.rs`, and `config.rs` look thin. Wire up
+`cargo-llvm-cov` and target the CAT backends and server tasks first.
+
+## Tier 3 — Product & maintainability
+
+### 8. Frontend modularization & tooling
+`app.js` is 8,760 lines and `map-core.js` 3,515, with no modules, linter, or
+tests. Keeping vanilla HTML+JS (no framework), split into native ES modules
+by concern, add ESLint + Prettier, and add `node:test` unit tests for pure
+logic (frequency formatting, unit math, decode parsing).
+
+### 9. Runtime observability
+`tracing` is set up, but there is no `/health` endpoint or metrics
+instrumentation. Add health/readiness endpoints and Prometheus-format
+metrics (decode rates, reconnects, audio underruns, per-rig state).
+
+### 10. Documentation freshness & consolidation
+`docs/` (13 files) is mostly dated 2026-03-29 while code moved into July, and
+mixes planning artifacts with reference docs. Reconcile against current code,
+separate "plans" from "reference," and fold still-true content into the
+canonical docs.

container/Containerfile

@@ -0,0 +1,61 @@
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+# Gitea Actions runner image for trx-rs CI (host-executor / "Pattern B").
+#
+# All build dependencies, the Rust toolchain, Node.js (for JS actions such as
+# actions/checkout and actions/cache) and the `reuse` tool are baked in, so CI
+# runs skip the per-run apt/rustup install cost. `sudo` is present so the
+# existing workflow's `sudo apt-get ...` / rustup steps remain valid — they
+# just become fast no-ops because everything is already installed.
+FROM docker.io/library/debian:bookworm-slim
+
+ARG ACT_RUNNER_VERSION=0.2.11
+ARG NODE_MAJOR=20
+
+ENV DEBIAN_FRONTEND=noninteractive \
+    RUSTUP_HOME=/opt/rustup \
+    CARGO_HOME=/opt/cargo \
+    PATH=/opt/cargo/bin:/usr/local/bin:/usr/bin:/bin
+
+# Base tooling + trx-rs build dependencies (mirrors .gitea/workflows/ci.yml).
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        ca-certificates curl xz-utils git sudo pipx \
+        build-essential pkg-config cmake clang libclang-dev \
+        libopus-dev libasound2-dev libsoapysdr-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Node.js (JS-based actions need node in PATH under the host executor).
+RUN curl -fsSL https://deb.nodesource.com/setup_${NODE_MAJOR}.x | bash - \
+    && apt-get install -y --no-install-recommends nodejs \
+    && rm -rf /var/lib/apt/lists/*
+
+# REUSE >= 3 (Debian's packaged reuse is too old for REUSE.toml).
+# The [charset-normalizer] extra provides an encoding-detection backend;
+# without it (and without libmagic) reuse fails to import at runtime.
+RUN PIPX_HOME=/opt/pipx PIPX_BIN_DIR=/usr/local/bin pipx install 'reuse[charset-normalizer]'
+
+# Rust stable with rustfmt + clippy, installed system-wide.
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs \
+        | sh -s -- -y --no-modify-path --profile minimal \
+          --component rustfmt --component clippy \
+    && chmod -R a+rwX "$CARGO_HOME" "$RUSTUP_HOME"
+
+# act_runner binary.
+RUN arch="$(dpkg --print-architecture)"; \
+    case "$arch" in amd64) rarch=amd64;; arm64) rarch=arm64;; *) echo "unsupported arch $arch" >&2; exit 1;; esac; \
+    curl -fsSL -o /usr/local/bin/act_runner \
+      "https://gitea.com/gitea/act_runner/releases/download/v${ACT_RUNNER_VERSION}/act_runner-${ACT_RUNNER_VERSION}-linux-${rarch}" \
+    && chmod +x /usr/local/bin/act_runner
+
+# Default config template (seeded into the /data volume on first boot).
+COPY config.yaml /etc/act_runner/config.yaml
+COPY entrypoint.sh /usr/local/bin/entrypoint.sh
+RUN chmod +x /usr/local/bin/entrypoint.sh
+
+# /data holds the .runner registration, cache and workflow workspaces.
+VOLUME /data
+WORKDIR /data
+
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]

container/README.md

@@ -0,0 +1,118 @@
+<!--
+SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+SPDX-License-Identifier: GPL-2.0-or-later
+-->
+
+# Podman-based Gitea Actions runners
+
+Run two independent Gitea Actions runners on one host as rootless Podman
+containers managed by systemd (Quadlet) — one per project — instead of two
+VMs. Uses the **host executor**: workflow steps run directly inside a
+purpose-built runner image that already has the Rust toolchain and all build
+dependencies baked in, so CI runs skip the per-run install cost and no
+Docker/Podman socket is needed.
+
+## Files
+
+| File | Purpose |
+|------|---------|
+| `Containerfile` | Runner image: Debian + build deps + clang + Rust + Node + `reuse` + `act_runner`. |
+| `entrypoint.sh` | Registers on first boot (if needed), then runs the daemon. |
+| `config.yaml` | act_runner config template (seeded into each runner's volume). |
+| `trx-rs-runner.container` | Quadlet unit for the trx-rs runner. |
+| `project2-runner.container` | Quadlet unit for the second project's runner. |
+
+## Prerequisites (once per host)
+
+Rootless Podman with cgroups v2 (default on modern distros). As the unprivileged
+user that will own the runners:
+
+```bash
+# Survive logout / start on boot without an interactive session.
+loginctl enable-linger "$USER"
+```
+
+No `podman.socket` is required for the host executor.
+
+## 1. Build the image
+
+```bash
+cd container
+podman build -t trx-rs-ci:latest .
+```
+
+## 2. Get a registration token
+
+For **each** repo: *Settings → Actions → Runners → Create new Runner* and copy
+the token. (Org- or instance-level tokens work too if you prefer wider scope.)
+
+## 3. Install and start the runners
+
+```bash
+mkdir -p ~/.config/containers/systemd
+cp trx-rs-runner.container project2-runner.container ~/.config/containers/systemd/
+
+# Paste each repo's token for the FIRST boot only:
+#   Environment=GITEA_RUNNER_REGISTRATION_TOKEN=xxxx…
+$EDITOR ~/.config/containers/systemd/trx-rs-runner.container
+$EDITOR ~/.config/containers/systemd/project2-runner.container
+
+systemctl --user daemon-reload
+systemctl --user start trx-rs-runner
+systemctl --user start project2-runner
+
+systemctl --user status trx-rs-runner
+podman logs -f gitea-runner-trx-rs
+```
+
+Once each runner shows **online** in the repo's runner list, blank out the
+`GITEA_RUNNER_REGISTRATION_TOKEN` line again (the registration is persisted in
+the `…-data` volume) and `systemctl --user daemon-reload`.
+
+## Required workflow change: the `reuse` job
+
+The host executor runs steps directly in the container and therefore **cannot
+run Docker-based actions**. The current `reuse` job uses `fsfe/reuse-action@v5`,
+which is a Docker action. `reuse` is baked into the image, so replace that job
+with a plain command:
+
+```yaml
+  reuse:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: REUSE compliance
+        run: reuse lint
+```
+
+The `lint` and `test` jobs need no changes: their `sudo apt-get …` and rustup
+steps still run, but become fast no-ops because the image already has those
+packages and the toolchain. (`sudo` is included in the image for exactly this
+reason.)
+
+> If you would rather keep Docker-based actions and per-run images, use the
+> **Docker executor** instead: drop the `:host` suffix from the label in
+> `config.yaml`, enable `systemctl --user --now enable podman.socket`, mount it
+> into the container, and set `container.docker_host` to the socket path. That
+> trades the baked-in speed for stronger per-job isolation.
+
+## Tuning
+
+- **`capacity`** (in `config.yaml`) — concurrent jobs per runner. Rust builds
+  are heavy; 1–2 is sensible when two runners share a host.
+- **`PodmanArgs=--cpus/--memory`** (in each `.container`) — hard resource caps
+  so one project cannot starve the other.
+- **SELinux** — the `:Z` volume flag is already set; keep it if SELinux is
+  enforcing.
+
+## Committing these files
+
+If you add this directory to a REUSE-checked repo, register the markdown in
+`REUSE.toml` (the other files carry inline SPDX headers):
+
+```toml
+[[annotations]]
+path = ["container/**"]
+SPDX-FileCopyrightText = "2026 Stan Grams <sjg@haxx.space>"
+SPDX-License-Identifier = "GPL-2.0-or-later"
+```

container/config.yaml

@@ -0,0 +1,32 @@
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# act_runner configuration template. Seeded into /data/config.yaml on first
+# boot; edit the copy inside the volume to change settings per runner.
+
+log:
+  level: info
+
+runner:
+  # Registration state. Relative to the daemon's working directory (/data).
+  file: .runner
+  # Concurrent jobs this runner will pick up. Rust builds are heavy — keep this
+  # modest, especially if two runners share one host. The trx-rs workflow has
+  # three parallel jobs (lint, test, reuse); capacity 2 lets two overlap.
+  capacity: 2
+  timeout: 3h
+  # Map the workflow's `runs-on: ubuntu-latest` to the HOST executor, i.e. run
+  # steps directly inside THIS container (which already has all the toolchain).
+  # No Docker/Podman socket is required in this mode.
+  labels:
+    - "ubuntu-latest:host"
+
+cache:
+  # Built-in actions cache server (used by actions/cache). Stored in the volume.
+  enabled: true
+  dir: "/data/cache"
+
+host:
+  # Where per-job workspaces are created.
+  workdir_parent: /data/workflows

container/entrypoint.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Registers the runner on first boot (if no .runner state exists in /data),
+# then runs the act_runner daemon. Idempotent: on subsequent boots it reuses
+# the stored registration and ignores the token.
+set -euo pipefail
+
+CONFIG_FILE="${CONFIG_FILE:-/data/config.yaml}"
+
+cd /data
+
+# Seed the config from the image's template on first boot so it lives in the
+# persistent volume and can be edited there.
+if [ ! -f "$CONFIG_FILE" ]; then
+    cp /etc/act_runner/config.yaml "$CONFIG_FILE"
+fi
+
+# runner.file in config.yaml is ".runner" (relative to this CWD => /data/.runner).
+if [ ! -f /data/.runner ]; then
+    if [ -z "${GITEA_RUNNER_REGISTRATION_TOKEN:-}" ]; then
+        echo "ERROR: no /data/.runner registration and GITEA_RUNNER_REGISTRATION_TOKEN is empty." >&2
+        echo "       Grab a token from the repo's Settings -> Actions -> Runners and set it" >&2
+        echo "       in the Quadlet unit for the first boot only." >&2
+        exit 1
+    fi
+    echo "Registering runner '${GITEA_RUNNER_NAME:-podman}' with ${GITEA_INSTANCE_URL} ..."
+    act_runner register --no-interactive \
+        --config   "$CONFIG_FILE" \
+        --instance "${GITEA_INSTANCE_URL:?set GITEA_INSTANCE_URL}" \
+        --token    "$GITEA_RUNNER_REGISTRATION_TOKEN" \
+        --name     "${GITEA_RUNNER_NAME:-podman}" \
+        --labels   "${GITEA_RUNNER_LABELS:-ubuntu-latest:host}"
+fi
+
+exec act_runner daemon --config "$CONFIG_FILE"

container/project2-runner.container

@@ -0,0 +1,40 @@
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Rootless Podman Quadlet for the SECOND project's Gitea Actions runner,
+# co-located on the same host as the trx-rs runner.
+#
+# It has its own name, its own data volume and its own registration token, so
+# the two runners are fully independent. They share the `ubuntu-latest` label,
+# but registration SCOPE (which repo each token came from) keeps their jobs
+# separate — neither will pick up the other's work.
+#
+# If project 2 needs different build dependencies, build it its own image from
+# an adjusted Containerfile and point Image= at that instead of reusing the
+# trx-rs image below.
+
+[Unit]
+Description=Gitea Actions runner — project 2
+After=network-online.target
+Wants=network-online.target
+
+[Container]
+Image=localhost/gitea-act-runner:latest
+ContainerName=gitea-runner-project2
+Volume=gitea-runner-project2-data:/data:Z
+
+Environment=CONFIG_FILE=/data/config.yaml
+Environment=GITEA_INSTANCE_URL=https://git.haxx.space
+Environment=GITEA_RUNNER_NAME=project2-podman
+Environment=GITEA_RUNNER_LABELS=ubuntu-latest:host
+Environment=GITEA_RUNNER_REGISTRATION_TOKEN=
+
+PodmanArgs=--cpus=4.0 --memory=6g
+
+[Service]
+Restart=always
+TimeoutStartSec=0
+
+[Install]
+WantedBy=default.target

container/trx-rs-runner.container

@@ -0,0 +1,41 @@
+# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Rootless Podman Quadlet for the trx-rs Gitea Actions runner.
+# Install to ~/.config/containers/systemd/trx-rs-runner.container then:
+#   systemctl --user daemon-reload
+#   systemctl --user start trx-rs-runner
+#
+# First boot only: paste a registration token (repo Settings -> Actions ->
+# Runners) into GITEA_RUNNER_REGISTRATION_TOKEN. After the runner appears
+# online you can blank it again — the registration is persisted in the volume.
+
+[Unit]
+Description=Gitea Actions runner — trx-rs
+After=network-online.target
+Wants=network-online.target
+
+[Container]
+Image=localhost/trx-rs-ci:latest
+ContainerName=gitea-runner-trx-rs
+# Persistent state: .runner registration, cache, workspaces.
+Volume=gitea-runner-trx-rs-data:/data:Z
+
+Environment=CONFIG_FILE=/data/config.yaml
+Environment=GITEA_INSTANCE_URL=https://git.haxx.space
+Environment=GITEA_RUNNER_NAME=trx-rs-podman
+Environment=GITEA_RUNNER_LABELS=ubuntu-latest:host
+Environment=GITEA_RUNNER_REGISTRATION_TOKEN=
+
+# Resource caps so a heavy Rust build here cannot starve the other project's
+# runner on the same host. Tune to your box.
+PodmanArgs=--cpus=4.0 --memory=6g
+
+[Service]
+Restart=always
+# A cold Rust build can be slow; don't let systemd consider startup failed.
+TimeoutStartSec=0
+
+[Install]
+WantedBy=default.target

src/decoders/trx-ais/src/lib.rs

@@ -243,7 +243,7 @@ fn parse_frame(frame: RawFrame, channel: &str) -> Option<AisMessage> {
 
     let message_type = get_uint(&bits, 0, 6)? as u8;
     let repeat = get_uint(&bits, 6, 2)? as u8;
-    let mmsi = get_uint(&bits, 8, 30)? as u32;
+    let mmsi = get_uint(&bits, 8, 30)?;
 
     let mut msg = AisMessage {
         rig_id: None,

src/decoders/trx-aprs/src/lib.rs

@@ -638,7 +638,7 @@ mod tests {
         for (i, &ch) in b"N0CALL".iter().enumerate() {
             addr[i] = ch << 1;
         }
-        addr[6] = (0 << 1) | 1; // SSID=0, last=true
+        addr[6] = 1; // SSID=0, last=true
 
         let decoded = decode_ax25_address(&addr, 0);
         assert_eq!(decoded.call, "N0CALL");
@@ -652,7 +652,7 @@ mod tests {
         for (i, &ch) in b"SP2SJG".iter().enumerate() {
             addr[i] = ch << 1;
         }
-        addr[6] = (5 << 1) | 0; // SSID=5, last=false
+        addr[6] = 5 << 1; // SSID=5, last=false
 
         let decoded = decode_ax25_address(&addr, 0);
         assert_eq!(decoded.call, "SP2SJG");
@@ -667,7 +667,7 @@ mod tests {
         for (i, &ch) in b"W1AW  ".iter().enumerate() {
             addr[i] = ch << 1;
         }
-        addr[6] = (0 << 1) | 1;
+        addr[6] = 1;
 
         let decoded = decode_ax25_address(&addr, 0);
         assert_eq!(decoded.call, "W1AW");
@@ -691,8 +691,8 @@ mod tests {
         for &ch in src_bytes.as_bytes().iter().take(6) {
             frame.push(ch << 1);
         }
-        frame.push((0 << 1) | 1); // SSID=0, last=true
+        frame.push(1); // SSID=0, last=true
-                                  // Control + PID
+                       // Control + PID
         frame.push(0x03); // UI frame
         frame.push(0xF0); // No layer-3 protocol
                           // Info field

src/decoders/trx-ftx/src/common/callsign_hash.rs

@@ -160,18 +160,14 @@ impl CallsignHashTable {
         let mut idx = start_idx;
 
         loop {
-            match &self.entries[idx] {
+            let entry = self.entries[idx].as_ref()?;
-                Some(entry) => {
+            let stored = (entry.hash & HASH22_MASK) >> shift;
-                    let stored = (entry.hash & HASH22_MASK) >> shift;
+            if stored == target {
-                    if stored == target {
+                return Some(entry.callsign.clone());
-                        return Some(entry.callsign.clone());
+            }
-                    }
+            idx = (idx + 1) % CALLSIGN_HASHTABLE_SIZE;
-                    idx = (idx + 1) % CALLSIGN_HASHTABLE_SIZE;
+            if idx == start_idx {
-                    if idx == start_idx {
+                return None;
-                        return None;
-                    }
-                }
-                None => return None,
             }
         }
     }

src/decoders/trx-ftx/src/common/ldpc.rs

@@ -42,8 +42,8 @@ pub(crate) fn ldpc_check(codeword: &[u8; FTX_LDPC_N]) -> i32 {
     for m in 0..FTX_LDPC_M {
         let mut x: u8 = 0;
         let num_rows = FTX_LDPC_NUM_ROWS[m] as usize;
-        for i in 0..num_rows {
+        for &nm in FTX_LDPC_NM[m].iter().take(num_rows) {
-            x ^= codeword[FTX_LDPC_NM[m][i] as usize - 1];
+            x ^= codeword[nm as usize - 1];
         }
         if x != 0 {
             errors += 1;
@@ -81,11 +81,11 @@ pub fn ldpc_decode(
         for j in 0..FTX_LDPC_M {
             let num_rows = FTX_LDPC_NUM_ROWS[j] as usize;
             let m_row = j * FTX_LDPC_N;
-            for ii1 in 0..num_rows {
+            for &nm1 in FTX_LDPC_NM[j].iter().take(num_rows) {
-                let i1 = FTX_LDPC_NM[j][ii1] as usize - 1;
+                let i1 = nm1 as usize - 1;
                 let mut a = 1.0f32;
-                for ii2 in 0..num_rows {
+                for &nm2 in FTX_LDPC_NM[j].iter().take(num_rows) {
-                    let i2 = FTX_LDPC_NM[j][ii2] as usize - 1;
+                    let i2 = nm2 as usize - 1;
                     if i2 != i1 {
                         a *= fast_tanh(-m_matrix[m_row + i2] / 2.0f32);
                     }
@@ -97,8 +97,8 @@ pub fn ldpc_decode(
         // Hard decisions
         for i in 0..FTX_LDPC_N {
             let mut l = codeword[i];
-            for j in 0..3 {
+            for &mn in FTX_LDPC_MN[i].iter().take(3) {
-                l += e_matrix[(FTX_LDPC_MN[i][j] as usize - 1) * FTX_LDPC_N + i];
+                l += e_matrix[(mn as usize - 1) * FTX_LDPC_N + i];
             }
             plain[i] = if l > 0.0 { 1 } else { 0 };
         }
@@ -113,12 +113,12 @@ pub fn ldpc_decode(
 
         // Update m[][] from e[][]
         for i in 0..FTX_LDPC_N {
-            for ji1 in 0..3 {
+            for (ji1, &mn1) in FTX_LDPC_MN[i].iter().enumerate().take(3) {
-                let j1 = FTX_LDPC_MN[i][ji1] as usize - 1;
+                let j1 = mn1 as usize - 1;
                 let mut l = codeword[i];
-                for ji2 in 0..3 {
+                for (ji2, &mn2) in FTX_LDPC_MN[i].iter().enumerate().take(3) {
                     if ji1 != ji2 {
-                        let j2 = FTX_LDPC_MN[i][ji2] as usize - 1;
+                        let j2 = mn2 as usize - 1;
                         l += e_matrix[j2 * FTX_LDPC_N + i];
                     }
                 }

src/decoders/trx-ftx/src/common/text.rs

@@ -64,10 +64,8 @@ pub fn charn(mut c: i32, table: CharTable) -> char {
                 return EXTRAS[c as usize];
             }
         }
-        CharTable::AlphanumSpaceSlash => {
+        CharTable::AlphanumSpaceSlash if c == 0 => {
-            if c == 0 {
+            return '/';
-                return '/';
-            }
         }
         _ => {}
     }
@@ -116,10 +114,8 @@ pub fn nchar(c: char, table: CharTable) -> Option<i32> {
             '?' => return Some(n + 4),
             _ => {}
         },
-        CharTable::AlphanumSpaceSlash => {
+        CharTable::AlphanumSpaceSlash if c == '/' => {
-            if c == '/' {
+            return Some(n);
-                return Some(n);
-            }
         }
         _ => {}
     }

src/decoders/trx-rds/src/lib.rs

@@ -632,32 +632,17 @@ impl Candidate {
             }
             let segment = usize::from((block_b & 0x0003) as u8);
             let di = ((block_b >> 2) & 0x1) != 0;
-            match segment {
+            let di_flag = Some(di);
-                0 => {
+            let slot = match segment {
-                    if self.state.dynamic_pty != Some(di) {
+                0 => &mut self.state.dynamic_pty,
-                        self.state.dynamic_pty = Some(di);
+                1 => &mut self.state.compressed,
-                        changed = true;
+                2 => &mut self.state.artificial_head,
-                    }
+                3 => &mut self.state.stereo,
-                }
+                _ => unreachable!("segment is masked to two bits"),
-                1 => {
+            };
-                    if self.state.compressed != Some(di) {
+            if *slot != di_flag {
-                        self.state.compressed = Some(di);
+                *slot = di_flag;
-                        changed = true;
+                changed = true;
-                    }
-                }
-                2 => {
-                    if self.state.artificial_head != Some(di) {
-                        self.state.artificial_head = Some(di);
-                        changed = true;
-                    }
-                }
-                3 => {
-                    if self.state.stereo != Some(di) {
-                        self.state.stereo = Some(di);
-                        changed = true;
-                    }
-                }
-                _ => {}
             }
             let [b0, b1] = block_d.to_be_bytes();
             self.ps_bytes[segment * 2] = sanitize_text_byte(b0);
@@ -1458,9 +1443,9 @@ mod tests {
         }
 
         // BPSK modulate onto the 57 kHz subcarrier.
-        for t in 0..n {
+        for (t, sample) in shaped.iter_mut().enumerate().take(n) {
             let phase = TAU * RDS_SUBCARRIER_HZ * t as f32 / sample_rate;
-            shaped[t] *= phase.cos();
+            *sample *= phase.cos();
         }
         shaped
     }

src/decoders/trx-vdes/src/crc.rs

@@ -134,9 +134,7 @@ mod tests {
             .flat_map(|&b| (0..8).rev().map(move |i| (b >> i) & 1))
             .collect();
         // Append wrong CRC
-        for _ in 0..16 {
+        bits.resize(bits.len() + 16, 0);
-            bits.push(0);
-        }
         assert!(!check_crc16(&bits));
     }
 

src/decoders/trx-vdes/src/link_layer.rs

@@ -346,8 +346,8 @@ mod tests {
         write_bits(&mut bits, 12, 32, 123456); // source_id
         write_bits(&mut bits, 44, 11, 20); // data_count = 20
                                            // Fill some payload
-        for i in 55..75 {
+        for (i, bit) in bits.iter_mut().enumerate().take(75).skip(55) {
-            bits[i] = (i % 2) as u8;
+            *bit = (i % 2) as u8;
         }
         append_crc(&mut bits);
 

src/decoders/trx-wefax/src/image.rs

@@ -374,8 +374,8 @@ mod tests {
         let (y, m, d, h, mi, _) = unix_to_utc(1775055000);
         assert_eq!(y, 2026);
         // Just verify reasonable values without asserting exact date.
-        assert!(m >= 1 && m <= 12);
+        assert!((1..=12).contains(&m));
-        assert!(d >= 1 && d <= 31);
+        assert!((1..=31).contains(&d));
         assert!(h < 24);
         assert!(mi < 60);
     }

src/decoders/trx-wefax/src/phase.rs

@@ -161,10 +161,8 @@ mod tests {
 
         for line_idx in 0..20 {
             let mut line = vec![1.0f32; spl];
-            for j in pulse_start..pulse_start + pw {
+            for slot in line.iter_mut().skip(pulse_start).take(pw) {
-                if j < spl {
+                *slot = 0.0;
-                    line[j] = 0.0;
-                }
             }
             let result = det.process(&line);
             if let Some(offset) = result {

src/decoders/trx-wspr/src/protocol.rs

@@ -483,7 +483,7 @@ mod tests {
         let c4 = idx27(b'T');
         let c5 = idx27(b' ');
         let n1 = ((c0 * 36 + c1) * 10 + c2) * 27u32.pow(3) + c3 * 27u32.pow(2) + c4 * 27 + c5;
-        let m1 = (179 - 10 * 5 - 2) * 180 + 10 * 13 + 0; // FN20
+        let m1 = (179 - 10 * 5 - 2) * 180 + 10 * 13; // FN20 (final term is 0)
         let power_code = 37u32;
 
         let mut input_bits = [0u8; NBITS];
@@ -530,8 +530,8 @@ mod tests {
     fn interleave_deinterleave_roundtrip() {
         // Create a sequence of distinguishable values
         let mut original = [0u8; NSYMS];
-        for i in 0..NSYMS {
+        for (i, slot) in original.iter_mut().enumerate() {
-            original[i] = (i % 256) as u8;
+            *slot = (i % 256) as u8;
         }
 
         let interleaved = interleave(&original);

src/trx-client/src/audio_client.rs

@@ -356,59 +356,6 @@ async fn run_single_rig_audio_client(
     }
 }
 
-#[cfg(test)]
-mod tests {
-    use super::{resolve_audio_addr, AudioConnectConfig};
-    use std::collections::HashMap;
-
-    #[test]
-    fn resolve_audio_addr_prefers_fixed_url() {
-        let mut rig_connect = HashMap::new();
-        rig_connect.insert(
-            "home-hf".to_string(),
-            AudioConnectConfig::fixed("audio.example.com:4700".to_string()),
-        );
-
-        let addr = resolve_audio_addr(
-            "home-hf",
-            Some(4531),
-            &rig_connect,
-            &AudioConnectConfig::from_host_port("control.example.com".to_string(), 4531),
-        );
-        assert_eq!(addr, "audio.example.com:4700");
-    }
-
-    #[test]
-    fn resolve_audio_addr_uses_advertised_port_with_remote_host() {
-        let mut rig_connect = HashMap::new();
-        rig_connect.insert(
-            "home-hf".to_string(),
-            AudioConnectConfig::from_host_port("control.example.com".to_string(), 4531),
-        );
-
-        let addr = resolve_audio_addr(
-            "home-hf",
-            Some(4600),
-            &rig_connect,
-            &AudioConnectConfig::from_host_port("fallback.example.com".to_string(), 4531),
-        );
-        assert_eq!(addr, "control.example.com:4600");
-    }
-
-    #[test]
-    fn resolve_audio_addr_falls_back_to_default_port() {
-        let rig_connect = HashMap::new();
-
-        let addr = resolve_audio_addr(
-            "home-hf",
-            None,
-            &rig_connect,
-            &AudioConnectConfig::from_host_port("fallback.example.com".to_string(), 4531),
-        );
-        assert_eq!(addr, "fallback.example.com:4531");
-    }
-}
-
 /// Handle a single TCP connection for one rig.  Similar to `handle_audio_connection`
 /// but publishes to per-rig channels directly and mirrors to global when selected.
 #[allow(clippy::too_many_arguments)]
@@ -767,3 +714,56 @@ async fn handle_single_rig_connection(
 
     Ok(())
 }
+
+#[cfg(test)]
+mod tests {
+    use super::{resolve_audio_addr, AudioConnectConfig};
+    use std::collections::HashMap;
+
+    #[test]
+    fn resolve_audio_addr_prefers_fixed_url() {
+        let mut rig_connect = HashMap::new();
+        rig_connect.insert(
+            "home-hf".to_string(),
+            AudioConnectConfig::fixed("audio.example.com:4700".to_string()),
+        );
+
+        let addr = resolve_audio_addr(
+            "home-hf",
+            Some(4531),
+            &rig_connect,
+            &AudioConnectConfig::from_host_port("control.example.com".to_string(), 4531),
+        );
+        assert_eq!(addr, "audio.example.com:4700");
+    }
+
+    #[test]
+    fn resolve_audio_addr_uses_advertised_port_with_remote_host() {
+        let mut rig_connect = HashMap::new();
+        rig_connect.insert(
+            "home-hf".to_string(),
+            AudioConnectConfig::from_host_port("control.example.com".to_string(), 4531),
+        );
+
+        let addr = resolve_audio_addr(
+            "home-hf",
+            Some(4600),
+            &rig_connect,
+            &AudioConnectConfig::from_host_port("fallback.example.com".to_string(), 4531),
+        );
+        assert_eq!(addr, "control.example.com:4600");
+    }
+
+    #[test]
+    fn resolve_audio_addr_falls_back_to_default_port() {
+        let rig_connect = HashMap::new();
+
+        let addr = resolve_audio_addr(
+            "home-hf",
+            None,
+            &rig_connect,
+            &AudioConnectConfig::from_host_port("fallback.example.com".to_string(), 4531),
+        );
+        assert_eq!(addr, "fallback.example.com:4531");
+    }
+}

src/trx-client/src/config.rs

@@ -1110,36 +1110,40 @@ url = "remote.example.com:4530"
 
     #[test]
     fn test_validate_rejects_duplicate_remote_names() {
-        let mut config = ClientConfig::default();
+        let config = ClientConfig {
-        config.remotes = vec![
+            remotes: vec![
-            RemoteEntry {
+                RemoteEntry {
-                name: "dup".to_string(),
+                    name: "dup".to_string(),
-                url: "a:4530".to_string(),
+                    url: "a:4530".to_string(),
-                rig_id: None,
+                    rig_id: None,
-                auth: RemoteAuthConfig::default(),
+                    auth: RemoteAuthConfig::default(),
-                poll_interval_ms: 750,
+                    poll_interval_ms: 750,
-            },
+                },
-            RemoteEntry {
+                RemoteEntry {
-                name: "dup".to_string(),
+                    name: "dup".to_string(),
-                url: "b:4530".to_string(),
+                    url: "b:4530".to_string(),
-                rig_id: None,
+                    rig_id: None,
-                auth: RemoteAuthConfig::default(),
+                    auth: RemoteAuthConfig::default(),
-                poll_interval_ms: 750,
+                    poll_interval_ms: 750,
-            },
+                },
-        ];
+            ],
+            ..Default::default()
+        };
         assert!(config.validate().unwrap_err().contains("duplicate name"));
     }
 
     #[test]
     fn test_validate_rejects_empty_remote_name() {
-        let mut config = ClientConfig::default();
+        let config = ClientConfig {
-        config.remotes = vec![RemoteEntry {
+            remotes: vec![RemoteEntry {
-            name: "".to_string(),
+                name: "".to_string(),
-            url: "a:4530".to_string(),
+                url: "a:4530".to_string(),
-            rig_id: None,
+                rig_id: None,
-            auth: RemoteAuthConfig::default(),
+                auth: RemoteAuthConfig::default(),
-            poll_interval_ms: 750,
+                poll_interval_ms: 750,
-        }];
+            }],
+            ..Default::default()
+        };
         assert!(config
             .validate()
             .unwrap_err()
@@ -1148,14 +1152,16 @@ url = "remote.example.com:4530"
 
     #[test]
     fn test_validate_rejects_empty_remote_url() {
-        let mut config = ClientConfig::default();
+        let config = ClientConfig {
-        config.remotes = vec![RemoteEntry {
+            remotes: vec![RemoteEntry {
-            name: "hf".to_string(),
+                name: "hf".to_string(),
-            url: "  ".to_string(),
+                url: "  ".to_string(),
-            rig_id: None,
+                rig_id: None,
-            auth: RemoteAuthConfig::default(),
+                auth: RemoteAuthConfig::default(),
-            poll_interval_ms: 750,
+                poll_interval_ms: 750,
-        }];
+            }],
+            ..Default::default()
+        };
         assert!(config
             .validate()
             .unwrap_err()
@@ -1164,14 +1170,16 @@ url = "remote.example.com:4530"
 
     #[test]
     fn test_validate_rejects_zero_remote_poll_interval() {
-        let mut config = ClientConfig::default();
+        let config = ClientConfig {
-        config.remotes = vec![RemoteEntry {
+            remotes: vec![RemoteEntry {
-            name: "hf".to_string(),
+                name: "hf".to_string(),
-            url: "a:4530".to_string(),
+                url: "a:4530".to_string(),
-            rig_id: None,
+                rig_id: None,
-            auth: RemoteAuthConfig::default(),
+                auth: RemoteAuthConfig::default(),
-            poll_interval_ms: 0,
+                poll_interval_ms: 0,
-        }];
+            }],
+            ..Default::default()
+        };
         assert!(config
             .validate()
             .unwrap_err()

src/trx-client/src/remote_client.rs

@@ -1678,7 +1678,7 @@ mod tests {
     #[test]
     fn global_target_for_snapshot_skips_other_server_selection() {
         let snapshot = sample_snapshot();
-        let rigs = vec![RigEntry {
+        let rigs = [RigEntry {
             rig_id: "hf".to_string(),
             display_name: Some("Gdansk HF".to_string()),
             state: snapshot,

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

@@ -104,24 +104,24 @@ SPDX-License-Identifier: GPL-2.0-or-later
       </div>
     </div>
     <!-- Auth gate (hidden by default, shown if auth is required) -->
-    <div id="auth-gate" style="display:none; max-width: 30rem; margin: 0 auto 0.9rem; padding: 1.25rem 0 1.5rem; text-align: center;">
+    <div id="auth-gate" class="auth-gate" style="display:none;">
-      <div style="margin-bottom: 1.5rem;">
+      <div class="auth-gate-head">
-        <div style="font-size: 1.1rem; font-weight: 600; margin-bottom: 0.5rem;">Access Required</div>
+        <div class="auth-gate-title">Access Required</div>
-        <div style="color: var(--text-muted);">Enter passphrase to continue</div>
+        <div class="auth-gate-sub">Enter passphrase to continue</div>
       </div>
-      <form id="auth-form" style="margin: 1rem 0 0.35rem;">
+      <form id="auth-form" class="auth-form">
-        <input type="password" id="auth-passphrase" placeholder="Passphrase" autocomplete="off" style="width: 100%; padding: 0.65rem 0.75rem; margin-bottom: 1rem; border: 1px solid var(--border-light); border-radius: 0.45rem; background: var(--input-bg); color: var(--text); font-size: 1rem; box-sizing: border-box;" />
+        <input type="password" id="auth-passphrase" class="auth-input" placeholder="Passphrase" autocomplete="off" />
-        <button type="submit" style="width: 100%; padding: 0.65rem 0.75rem; background: var(--accent-green); color: #fff; border: none; border-radius: 0.45rem; font-weight: 700; cursor: pointer; font-size: 1rem; box-sizing: border-box;">Login</button>
+        <button type="submit" class="auth-submit">Login</button>
       </form>
-      <button id="auth-guest-btn" type="button" style="width: 100%; padding: 0.65rem 0.75rem; background: var(--btn-bg); color: var(--text); border: 1px solid var(--border-light); border-radius: 0.45rem; font-weight: 600; cursor: pointer; font-size: 1rem; box-sizing: border-box; margin-top: 0; display: none;">Continue as Guest</button>
+      <button id="auth-guest-btn" type="button" class="auth-guest" style="display: none;">Continue as Guest</button>
-      <div id="auth-error" style="color: #ff6b6b; font-size: 0.9rem; margin-top: 1rem; display: none;"></div>
+      <div id="auth-error" class="auth-error" style="display: none;"></div>
-      <div id="auth-role" style="margin-top: 1rem; color: var(--text-muted); font-size: 0.85rem; display: none;"></div>
+      <div id="auth-role" class="auth-role" style="display: none;"></div>
     </div>
     <div id="tab-main" class="tab-panel">
     <div id="server-lost-banner" aria-live="assertive"><span class="banner-dot"></span>trx-server connection lost — waiting for reconnect</div>
     <div id="loading" role="status" aria-live="polite" style="text-align:center; padding:2rem 0;">
       <div id="loading-title" style="margin-bottom:0.4rem; font-size:1.1rem; font-weight:600;">Initializing (rig)…</div>
-      <div id="loading-sub" style="color:#9aa4b5;"></div>
+      <div id="loading-sub" style="color:var(--text-muted);"></div>
     </div>
     <div id="content" style="display:none;">
     <div class="signal-visual-block">
@@ -1624,6 +1624,8 @@ SPDX-License-Identifier: GPL-2.0-or-later
     </div>
   </div>
   <script defer src="https://cdn.jsdelivr.net/npm/opus-decoder@0.7.11/dist/opus-decoder.min.js" charset="UTF-8"></script>
+  <script defer src="/vendor/leaflet.js"></script>
+  <script defer src="/leaflet-ais-tracksymbol.js"></script>
   <script defer src="/webgl-renderer.js"></script>
   <script defer src="/app.js"></script>
   <script>
@@ -1632,7 +1634,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
   var pluginScripts = {
     'digital-modes': ['/ft8.js', '/ft4.js', '/ft2.js', '/wspr.js', '/cw.js', '/background-decode.js', '/sat.js', '/wefax.js'],
     'map-data': ['/map-core.js', '/ais.js', '/vdes.js', '/aprs.js', '/hf-aprs.js'],
-    'map': ['/map-core.js', '/leaflet-ais-tracksymbol.js', '/ais.js', '/vdes.js', '/aprs.js', '/hf-aprs.js', '/sat.js', '/sat-scheduler.js'],
+    'map': ['/map-core.js', '/ais.js', '/vdes.js', '/aprs.js', '/hf-aprs.js', '/sat.js', '/sat-scheduler.js'],
     'statistics': ['/map-core.js'],
     'bookmarks': ['/bookmarks.js'],
     'recorder': [],
@@ -1667,6 +1669,5 @@ SPDX-License-Identifier: GPL-2.0-or-later
 })();
   </script>
   <!-- Template cloning is handled by navigateToTab() in app.js -->
-  <script defer src="/vendor/leaflet.js"></script>
 </body>
 </html>

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

@@ -47,6 +47,50 @@ SPDX-License-Identifier: GPL-2.0-or-later
   --border-hover: color-mix(in srgb, var(--border-light) 80%, var(--text) 20%);
   --accent-green-hover: color-mix(in srgb, var(--accent-green) 85%, #fff 15%);
   --accent-green-active: color-mix(in srgb, var(--accent-green) 75%, #fff 25%);
+  /* Accent tuned for text/links: mixes toward the theme's text colour,
+     which is always the higher-contrast direction (lighter on dark
+     themes, darker on light). Use for accent-coloured text; keep
+     --accent-green for fills, indicators and meters. */
+  --accent-text: color-mix(in srgb, var(--accent-green) 82%, var(--text) 18%);
+
+  /* ── Design tokens ──────────────────────────────────────────────────
+     Derived tokens use color-mix over themed variables, so they
+     re-resolve per active [data-style]/[data-theme] automatically. */
+
+  /* Elevated surface, one step lighter than --card-bg. Consumed by
+     .controls-tray and other raised panels. */
+  --surface: color-mix(in srgb, var(--card-bg) 90%, var(--text) 7%);
+
+  /* Type scale */
+  --fs-xs: 0.75rem;
+  --fs-sm: 0.85rem;
+  --fs-base: 1rem;
+  --fs-md: 1.125rem;
+  --fs-lg: 1.25rem;
+  --fs-xl: 1.5rem;
+  --fs-2xl: 2rem;
+
+  /* Spacing scale (4px grid) */
+  --space-1: 0.25rem;
+  --space-2: 0.5rem;
+  --space-3: 0.75rem;
+  --space-4: 1rem;
+  --space-5: 1.25rem;
+  --space-6: 1.5rem;
+  --space-8: 2rem;
+
+  /* Corner radii */
+  --radius-sm: 6px;
+  --radius-md: 0.5rem;
+  --radius-lg: 1rem;
+  --radius-pill: 999px;
+
+  /* Motion */
+  --dur-fast: 100ms;
+  --dur-base: 180ms;
+  --dur-slow: 300ms;
+  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
+  --ease-out: cubic-bezier(0, 0, 0.2, 1);
 }
 
 [data-theme="light"] {
@@ -89,6 +133,10 @@ SPDX-License-Identifier: GPL-2.0-or-later
 
 body {
   font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+  font-size: var(--fs-base);
+  line-height: 1.5;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
   margin: 0;
   min-height: 100vh;
   min-height: 100dvh;
@@ -120,6 +168,57 @@ body {
     );
   }
 }
+/* ── Auth gate ────────────────────────────────────────────────────────
+   Class-based; #display toggling stays inline (driven by app.js). */
+.auth-gate {
+  max-width: 30rem;
+  margin: 0 auto 0.9rem;
+  padding: var(--space-5) 0 var(--space-6);
+  text-align: center;
+}
+.auth-gate-head { margin-bottom: var(--space-6); }
+.auth-gate-title { font-size: var(--fs-md); font-weight: 600; margin-bottom: var(--space-2); }
+.auth-gate-sub { color: var(--text-muted); }
+.auth-form { margin: var(--space-4) 0 0.35rem; }
+.auth-input {
+  width: 100%;
+  padding: 0.65rem 0.75rem;
+  margin-bottom: var(--space-4);
+  border: 1px solid var(--border-light);
+  border-radius: var(--radius-md);
+  background: var(--input-bg);
+  color: var(--text);
+  font-size: var(--fs-base);
+  box-sizing: border-box;
+}
+.auth-submit,
+.auth-guest {
+  width: 100%;
+  padding: 0.65rem 0.75rem;
+  border-radius: var(--radius-md);
+  font-size: var(--fs-base);
+  cursor: pointer;
+  box-sizing: border-box;
+  transition: background-color var(--dur-fast) var(--ease-standard);
+}
+.auth-submit {
+  background: var(--accent-green);
+  color: #fff;
+  border: none;
+  font-weight: 700;
+}
+.auth-submit:hover:not(:disabled) { background: var(--accent-green-hover); }
+.auth-guest {
+  background: var(--btn-bg);
+  color: var(--text);
+  border: 1px solid var(--border-light);
+  font-weight: 600;
+  margin-top: var(--space-4);
+}
+.auth-guest:hover:not(:disabled) { background: var(--btn-hover-bg); }
+.auth-error { color: var(--accent-red); font-size: var(--fs-sm); margin-top: var(--space-4); }
+.auth-role { margin-top: var(--space-4); color: var(--text-muted); font-size: var(--fs-sm); }
+
 .label { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 6px; display: block; }
 #tab-main .label > span {
   display: inline-block;
@@ -220,7 +319,7 @@ input.status-input, select.status-input { width: 100%; padding: 0.45rem 0.5rem;
   align-items: stretch;
   gap: 0.22rem;
   color: var(--text-muted);
-  font-size: 0.72rem;
+  font-size: 0.75rem;
   line-height: 1.1;
   white-space: nowrap;
 }
@@ -408,7 +507,7 @@ input.status-input, select.status-input { width: 100%; padding: 0.45rem 0.5rem;
   border-radius: 0;
   height: 100%;
   padding: 0 0.65rem;
-  font-size: 0.92rem;
+  font-size: 0.9rem;
   background: var(--input-bg);
   color: var(--text-muted);
   cursor: pointer;
@@ -486,7 +585,7 @@ input.status-input, select.status-input { width: 100%; padding: 0.45rem 0.5rem;
 }
 .scheduler-cycle-status {
   color: var(--text-muted);
-  font-size: 0.74rem;
+  font-size: 0.75rem;
   text-align: left;
   opacity: 0.88;
 }
@@ -1357,7 +1456,7 @@ small { color: var(--text-muted); }
 }
 .header-logo { height: 4.6em; width: auto; flex-shrink: 0; filter: drop-shadow(0 4px 12px rgba(0,0,0,0.35)); }
 .subtitle { color: var(--text-muted); font-size: 0.95rem; }
-.subtitle a { color: var(--accent-green); text-decoration: none; }
+.subtitle a { color: var(--accent-text); text-decoration: none; }
 .subtitle a:hover { text-decoration: underline; }
 .band-tag { display: inline-block; padding: 2px 6px; border-radius: 6px; background: var(--btn-bg); color: var(--text); font-size: 0.82rem; border: 1px solid var(--border-light); margin-left: 6px; }
 .signal { display: flex; gap: 0.6rem; align-items: center; }
@@ -1433,7 +1532,7 @@ small { color: var(--text-muted); }
   font-size: 0.95rem;
   height: auto;
 }
-.tab.active { border-bottom-color: var(--accent-green); color: var(--accent-green); font-weight: 600; }
+.tab.active { border-bottom-color: var(--accent-green); color: var(--accent-text); font-weight: 600; }
 .tab:hover:not(.active) { color: var(--text); }
 /* Tab icons — hidden on desktop, shown on mobile bottom nav */
 .tab-icon {
@@ -1458,7 +1557,7 @@ small { color: var(--text-muted); }
 .footer { display: flex; justify-content: space-between; align-items: baseline; margin-top: auto; padding-top: 1rem; flex-shrink: 0; }
 .full-row { grid-column: 1 / -1; }
 .copyright { color: var(--text-muted); font-size: 0.75rem; opacity: 0.7; }
-.copyright a { color: var(--accent-green); text-decoration: none; }
+.copyright a { color: var(--accent-text); text-decoration: none; }
 .copyright a:hover { text-decoration: underline; }
 .gh-link-wrap {
   display: inline-flex;
@@ -1499,7 +1598,7 @@ small { color: var(--text-muted); }
   white-space: nowrap;
 }
 .vol-pct {
-  font-size: 0.72rem;
+  font-size: 0.75rem;
   color: var(--text-muted);
   line-height: 1;
 }
@@ -1602,7 +1701,7 @@ small { color: var(--text-muted); }
 }
 .shortcut-table td {
   padding: 0.32rem 0.4rem;
-  font-size: 0.88rem;
+  font-size: 0.85rem;
   color: var(--text);
   border-bottom: 1px solid color-mix(in srgb, var(--border-light) 40%, transparent);
 }
@@ -1632,7 +1731,7 @@ small { color: var(--text-muted); }
 .shortcut-overlay-hint {
   margin-top: 0.7rem;
   text-align: center;
-  font-size: 0.76rem;
+  font-size: 0.75rem;
   color: var(--text-muted);
 }
 
@@ -1706,7 +1805,7 @@ small { color: var(--text-muted); }
   text-align: center;
 }
 .decode-history-overlay-title {
-  font-size: 0.98rem;
+  font-size: 1rem;
   font-weight: 800;
   color: var(--text-heading);
 }
@@ -1756,7 +1855,7 @@ small { color: var(--text-muted); }
   gap: 0.75rem;
 }
 .map-qso-summary-title {
-  font-size: 0.88rem;
+  font-size: 0.85rem;
   font-weight: 800;
   letter-spacing: 0.08em;
   text-transform: uppercase;
@@ -1841,7 +1940,7 @@ button.map-qso-card:focus-visible {
   border-radius: 999px;
   background: color-mix(in srgb, var(--accent-green) 16%, transparent);
   color: var(--accent-green);
-  font-size: 0.76rem;
+  font-size: 0.75rem;
   font-weight: 800;
 }
 .map-qso-card-distance {
@@ -1858,7 +1957,7 @@ button.map-qso-card:focus-visible {
   min-width: 0;
 }
 .map-qso-card-pair {
-  font-size: 0.92rem;
+  font-size: 0.9rem;
   font-weight: 700;
   color: var(--text);
   white-space: nowrap;
@@ -1948,7 +2047,7 @@ button.map-qso-card:focus-visible {
   border: 1px solid color-mix(in srgb, var(--border-light) 74%, transparent);
   background: color-mix(in srgb, var(--card-bg) 82%, transparent);
   color: var(--text);
-  font-size: 0.76rem;
+  font-size: 0.75rem;
   font-weight: 700;
   letter-spacing: 0.02em;
   cursor: pointer;
@@ -1967,7 +2066,7 @@ button.map-qso-card:focus-visible {
   border: 1px solid color-mix(in srgb, var(--border-light) 74%, transparent);
   background: color-mix(in srgb, var(--card-bg) 82%, transparent);
   color: var(--text);
-  font-size: 0.76rem;
+  font-size: 0.75rem;
   font-weight: 700;
   letter-spacing: 0.02em;
   cursor: pointer;
@@ -2000,7 +2099,7 @@ button.map-qso-card:focus-visible {
   display: none;
 }
 .map-band-legend-title {
-  font-size: 0.72rem;
+  font-size: 0.75rem;
   font-weight: 800;
   letter-spacing: 0.1em;
   text-transform: uppercase;
@@ -2027,7 +2126,7 @@ button.map-qso-card:focus-visible {
 }
 .map-band-legend-text {
   min-width: 0;
-  font-size: 0.76rem;
+  font-size: 0.75rem;
   font-weight: 700;
   color: var(--text);
   white-space: nowrap;
@@ -2084,7 +2183,7 @@ body.map-fake-fullscreen-active {
 }
 .aprs-summary-label {
   color: var(--text-muted);
-  font-size: 0.72rem;
+  font-size: 0.75rem;
   font-weight: 700;
   letter-spacing: 0.06em;
   text-transform: uppercase;
@@ -2142,7 +2241,7 @@ body.map-fake-fullscreen-active {
 }
 .ais-summary-label {
   color: var(--text-muted);
-  font-size: 0.72rem;
+  font-size: 0.75rem;
   font-weight: 700;
   letter-spacing: 0.06em;
   text-transform: uppercase;
@@ -2260,7 +2359,7 @@ body.map-fake-fullscreen-active {
 }
 .aprs-meta-text {
   color: var(--text-muted);
-  font-size: 0.76rem;
+  font-size: 0.75rem;
 }
 .aprs-inline-btn {
   display: inline-flex;
@@ -2273,7 +2372,7 @@ body.map-fake-fullscreen-active {
   background: var(--filter-bg);
   color: var(--filter-fg);
   font: inherit;
-  font-size: 0.74rem;
+  font-size: 0.75rem;
   cursor: pointer;
 }
 .aprs-inline-btn:hover {
@@ -2286,7 +2385,7 @@ body.map-fake-fullscreen-active {
 .aprs-details summary {
   cursor: pointer;
   color: var(--accent-green);
-  font-size: 0.76rem;
+  font-size: 0.75rem;
   user-select: none;
 }
 .aprs-details[open] summary {
@@ -2364,7 +2463,7 @@ body.map-fake-fullscreen-active {
 }
 .ais-meta-text {
   color: var(--text-muted);
-  font-size: 0.76rem;
+  font-size: 0.75rem;
 }
 .ais-pos-link {
   color: var(--accent-red);
@@ -2406,7 +2505,7 @@ body.map-fake-fullscreen-active {
 }
 .vdes-raw {
   color: var(--text-muted);
-  font-size: 0.76rem;
+  font-size: 0.75rem;
   word-break: break-all;
 }
 .aprs-symbol { display: inline-block; width: 24px; height: 24px; background-size: 384px 192px; vertical-align: middle; margin-right: 0.3rem; }
@@ -2465,18 +2564,18 @@ body.map-fake-fullscreen-active {
 }
 .decode-locator-tip-meta {
   margin-top: 0.12rem;
-  font-size: 0.74rem;
+  font-size: 0.75rem;
   color: var(--text-muted);
 }
 .decode-locator-tip-rx {
   margin-top: 0.12rem;
-  font-size: 0.72rem;
+  font-size: 0.75rem;
   color: var(--accent-yellow);
   opacity: 0.85;
 }
 .decode-locator-tip-note {
   margin-top: 0.2rem;
-  font-size: 0.76rem;
+  font-size: 0.75rem;
   line-height: 1.3;
   color: var(--text);
   word-break: break-word;
@@ -2503,7 +2602,7 @@ body.map-fake-fullscreen-active {
   background: color-mix(in srgb, var(--card-bg) 88%, transparent);
   color: color-mix(in srgb, var(--accent-green) 72%, var(--accent-yellow));
   box-shadow: 0 8px 18px rgba(0, 0, 0, 0.22);
-  font-size: 0.72rem;
+  font-size: 0.75rem;
   font-weight: 700;
   letter-spacing: 0.03em;
   white-space: nowrap;
@@ -2576,7 +2675,7 @@ body.map-fake-fullscreen-active {
   flex: 0 0 auto;
   min-width: 4.4rem;
   padding-top: 0.35rem;
-  font-size: 0.72rem;
+  font-size: 0.75rem;
   font-weight: 700;
   letter-spacing: 0.03em;
   text-transform: uppercase;
@@ -2604,7 +2703,7 @@ body.map-fake-fullscreen-active {
   border: 1px solid color-mix(in srgb, var(--border-light) 82%, transparent);
   background: color-mix(in srgb, var(--input-bg) 92%, transparent);
   color: var(--text-muted);
-  font-size: 0.76rem;
+  font-size: 0.75rem;
   font-weight: 700;
   letter-spacing: 0.02em;
   text-transform: uppercase;
@@ -2621,7 +2720,7 @@ body.map-fake-fullscreen-active {
   color: var(--accent-green);
 }
 .map-locator-empty {
-  font-size: 0.74rem;
+  font-size: 0.75rem;
   color: var(--text-muted);
   opacity: 0.8;
   align-self: flex-start;
@@ -2655,7 +2754,7 @@ body.map-fake-fullscreen-active {
   background: color-mix(in srgb, var(--input-bg) 96%, transparent);
 }
 .map-locator-chip-text {
-  font-size: 0.77rem;
+  font-size: 0.78rem;
   font-weight: 600;
 }
 .map-search-input {
@@ -2712,7 +2811,7 @@ body.map-fake-fullscreen-active {
 .rds-raw-header { display: flex; align-items: center; justify-content: space-between; gap: 0.6rem; margin-bottom: 0.3rem; }
 .rds-raw-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); margin-bottom: 0.3rem; }
 .rds-raw-header .rds-raw-label { margin-bottom: 0; }
-#rds-raw-copy-btn { height: 1.65rem; padding: 0 0.55rem; font-size: 0.72rem; }
+#rds-raw-copy-btn { height: 1.65rem; padding: 0 0.55rem; font-size: 0.75rem; }
 .rds-raw { background: var(--input-bg); border: 1px solid var(--border-light); border-radius: 6px; padding: 0.5rem 0.6rem; font-size: 0.8rem; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; color: var(--text); white-space: pre; overflow-x: auto; margin: 0; }
 
 .cw-controls { display: flex; gap: 0.6rem; align-items: center; margin-bottom: 0.75rem; }
@@ -2733,7 +2832,9 @@ body.map-fake-fullscreen-active {
 .cw-config input[type="number"][readonly] { opacity: 0.6; }
 .cw-config input[type="number"]:disabled { opacity: 0.58; }
 
-button:focus-visible, input:focus-visible, select:focus-visible {
+button:focus-visible, input:focus-visible, select:focus-visible,
+textarea:focus-visible, a:focus-visible,
+canvas:focus-visible, [tabindex]:focus-visible {
   outline: 2px solid var(--accent-green);
   outline-offset: 2px;
 }
@@ -2844,7 +2945,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   }
   /* Collapse verbose subtitles — the About tab has this info */
   .tab-bar .subtitle { display: none; }
-  .tab-bar .title { font-size: 0.92rem; }
+  .tab-bar .title { font-size: 0.9rem; }
   .tab-bar-nav {
     position: fixed;
     left: calc(0.6rem + env(safe-area-inset-left));
@@ -3506,7 +3607,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   will-change: transform;
   cursor: pointer;
   font-weight: 600;
-  font-size: 0.66rem;
+  font-size: 0.65rem;
   background: var(--bm-cat-bg, var(--accent-yellow));
   color: var(--bm-cat-fg, #1a202c);
   border: 1px solid var(--bm-cat-bg, var(--accent-yellow));
@@ -3598,7 +3699,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
 }
 .spectrum-bookmark-chip-side .spectrum-bookmark-name {
   width: 100%;
-  font-size: 0.64rem;
+  font-size: 0.65rem;
   font-weight: 600;
   white-space: nowrap;
   overflow: hidden;
@@ -3662,7 +3763,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   height: 1.5rem;
   min-height: 0;
   padding: 0 8px;
-  font-size: 0.73rem;
+  font-size: 0.75rem;
 }
 #spectrum-level-row {
   display: flex;
@@ -3709,7 +3810,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   height: 1.5rem;
   min-height: 0;
   padding: 0 8px;
-  font-size: 0.73rem;
+  font-size: 0.75rem;
 }
 #spectrum-gamma-label {
   display: flex;
@@ -3724,7 +3825,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   cursor: pointer;
 }
 #spectrum-gamma-value {
-  font-size: 0.72rem;
+  font-size: 0.75rem;
   min-width: 1.6rem;
   text-align: right;
 }
@@ -3882,7 +3983,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
 
 .bm-label input,
 .bm-label select {
-  font-size: 0.88rem;
+  font-size: 0.85rem;
   padding: 0.35rem 0.5rem;
 }
 
@@ -3938,7 +4039,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   align-items: center;
   gap: 0.35rem;
   color: var(--text);
-  font-size: 0.84rem;
+  font-size: 0.85rem;
 }
 
 .bm-decoder-check input {
@@ -4048,7 +4149,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
 .bm-page-summary,
 .bm-page-indicator {
   color: var(--text-muted);
-  font-size: 0.88rem;
+  font-size: 0.85rem;
 }
 .bm-page-controls {
   display: flex;
@@ -4266,7 +4367,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   color: var(--text);
   border-radius: var(--radius);
   padding: 0.55rem 1rem;
-  font-size: 0.88rem;
+  font-size: 0.85rem;
 }
 #sch-sat-form-cancel:hover {
   background: var(--border);
@@ -4478,7 +4579,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
 .sch-log-action {
   font-weight: 600;
   text-transform: uppercase;
-  font-size: 0.72rem;
+  font-size: 0.75rem;
 }
 .sch-log-bm {
   color: var(--accent);
@@ -4687,7 +4788,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   }
   .bgd-checklist-meta {
     margin-left: 0;
-    font-size: 0.72rem;
+    font-size: 0.75rem;
   }
 }
 /* ── SAT panel ──────────────────────────────────────────────────────── */
@@ -4756,7 +4857,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   gap: 0.25rem;
 }
 .stats-control-label {
-  font-size: 0.72rem;
+  font-size: 0.75rem;
   font-weight: 600;
   text-transform: uppercase;
   letter-spacing: 0.06em;
@@ -4796,7 +4897,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   line-height: 1.1;
 }
 .stats-counter-label {
-  font-size: 0.74rem;
+  font-size: 0.75rem;
   font-weight: 600;
   text-transform: uppercase;
   letter-spacing: 0.06em;
@@ -4819,7 +4920,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   gap: 0.18rem;
 }
 .stats-section-title {
-  font-size: 0.88rem;
+  font-size: 0.85rem;
   font-weight: 800;
   letter-spacing: 0.08em;
   text-transform: uppercase;
@@ -4884,7 +4985,7 @@ button:focus-visible, input:focus-visible, select:focus-visible {
   #tab-statistics { padding: 0.75rem; }
   .stats-counters { grid-template-columns: repeat(2, 1fr); }
   .stats-counter-value { font-size: 1.3rem; }
-  .stats-bar-label { min-width: 4rem; font-size: 0.72rem; }
+  .stats-bar-label { min-width: 4rem; font-size: 0.75rem; }
   .stats-section { padding: 0.8rem 0.85rem 0.9rem; }
 }
 
@@ -4945,3 +5046,18 @@ button:focus-visible, input:focus-visible, select:focus-visible {
     -webkit-backdrop-filter: blur(12px);
   }
 }
+
+/* ── Panel-switch fade ────────────────────────────────────────────────
+   Panels are shown by clearing inline display (app.js), so this fires on
+   every tab/sub-tab change. Opacity-only to avoid transforming canvases
+   and the Leaflet map. Gated so reduced-motion users get instant switches. */
+@media (prefers-reduced-motion: no-preference) {
+  .tab-panel,
+  .sub-tab-panel {
+    animation: trx-fade-in var(--dur-base) var(--ease-out);
+  }
+}
+@keyframes trx-fade-in {
+  from { opacity: 0; }
+  to   { opacity: 1; }
+}

src/trx-server/src/history_store.rs

@@ -185,20 +185,38 @@ pub fn flush_all(db: &mut PickleDb, rig_id: &str, histories: &Arc<DecoderHistori
     let _ = db.dump();
 }
 
+fn flush_all_rigs(db: &Mutex<PickleDb>, rig_histories: &[(String, Arc<DecoderHistories>)]) {
+    let Ok(mut guard) = db.lock() else {
+        tracing::warn!("history database mutex poisoned; skipping periodic flush");
+        return;
+    };
+    for (rig_id, histories) in rig_histories {
+        flush_all(&mut guard, rig_id, histories);
+    }
+}
+
 /// Spawn a Tokio task that flushes all rigs' histories to disk every 60 seconds.
+///
+/// Snapshot cloning, JSON serialization, and disk I/O run on Tokio's blocking
+/// pool so a large history database cannot stall an async runtime worker.
 pub fn spawn_flush_task(
     db: Arc<Mutex<PickleDb>>,
     rig_histories: Vec<(String, Arc<DecoderHistories>)>,
 ) {
     tokio::spawn(async move {
+        let rig_histories = Arc::new(rig_histories);
         let mut interval = tokio::time::interval(Duration::from_secs(60));
         interval.tick().await; // consume the immediate first tick
         loop {
             interval.tick().await;
-            if let Ok(mut guard) = db.lock() {
+            let db = Arc::clone(&db);
-                for (rig_id, histories) in &rig_histories {
+            let rig_histories = Arc::clone(&rig_histories);
-                    flush_all(&mut guard, rig_id, histories);
+            if let Err(err) = tokio::task::spawn_blocking(move || {
-                }
+                flush_all_rigs(&db, rig_histories.as_slice());
+            })
+            .await
+            {
+                tracing::warn!(error = %err, "history flush worker failed");
             }
         }
     });

src/trx-server/trx-backend/trx-backend-soapysdr/src/demod/wfm.rs

@@ -1596,7 +1596,7 @@ mod tests {
             let t = i as f32 / fs;
             adj_phase += adj_mod_index * adj_composite[i];
             let adj = Complex::from_polar(0.5, adj_phase + TAU * adj_freq_offset * t);
-            *s = *s + adj;
+            *s += adj;
         }
 
         let mut decoder = WfmStereoDecoder::new(
@@ -1673,7 +1673,7 @@ mod tests {
         // Mix at 70 % of the main signal's amplitude — strong enough to
         // overcome the FM capture effect and visibly degrade pilot coherence.
         for (s, intf) in iq.iter_mut().zip(intf_iq.iter()) {
-            *s = *s + intf * 0.7;
+            *s += intf * 0.7;
         }
 
         let mut decoder = WfmStereoDecoder::new(