[feat](trx-frontend-http): add decoder toggle/clear UI and endpoints

Add POST endpoints for toggle_aprs_decode, toggle_cw_decode,
clear_aprs_decode, and clear_cw_decode. Add toggle buttons in APRS
and CW tabs. Render decoder enabled state from SSE updates. Clear
button now also resets server-side decoder state.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stanislaw Grams <stanislawgrams@gmail.com>

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

@@ -362,6 +362,24 @@ function render(update) {
   if (typeof update.clients === "number") {
     document.getElementById("about-clients").textContent = update.clients;
   }
+  // Decoder toggle buttons
+  const aprsToggleBtn = document.getElementById("aprs-decode-toggle-btn");
+  const cwToggleBtn = document.getElementById("cw-decode-toggle-btn");
+  if (aprsToggleBtn) {
+    const aprsOn = !!update.aprs_decode_enabled;
+    aprsToggleBtn.textContent = aprsOn ? "Disable APRS" : "Enable APRS";
+    aprsToggleBtn.style.borderColor = aprsOn ? "#00d17f" : "";
+    aprsToggleBtn.style.color = aprsOn ? "#00d17f" : "";
+    window.aprsDecodeEnabled = aprsOn;
+  }
+  if (cwToggleBtn) {
+    const cwOn = !!update.cw_decode_enabled;
+    cwToggleBtn.textContent = cwOn ? "Disable CW" : "Enable CW";
+    cwToggleBtn.style.borderColor = cwOn ? "#00d17f" : "";
+    cwToggleBtn.style.color = cwOn ? "#00d17f" : "";
+    window.cwDecodeEnabled = cwOn;
+  }
+
   powerHint.textContent = readyText();
   lastLocked = update.status && update.status.lock === true;
   lockBtn.textContent = lastLocked ? "Unlock" : "Lock";

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

@@ -145,6 +145,7 @@
       </div>
       <div id="subtab-aprs" class="sub-tab-panel" style="display:none;">
         <div class="aprs-controls">
+          <button id="aprs-decode-toggle-btn" type="button">Enable APRS</button>
           <button id="aprs-clear-btn" type="button">Clear</button>
           <small id="aprs-status" style="color:var(--text-muted);">Waiting for server decode</small>
         </div>
@@ -152,6 +153,7 @@
       </div>
       <div id="subtab-cw" class="sub-tab-panel" style="display:none;">
         <div class="cw-controls">
+          <button id="cw-decode-toggle-btn" type="button">Enable CW</button>
           <button id="cw-clear-btn" type="button">Clear</button>
           <small id="cw-status" style="color:var(--text-muted);">Waiting for server decode</small>
           <div id="cw-signal-indicator" class="cw-signal-off"></div>

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

@@ -72,10 +72,15 @@ function addAprsPacket(pkt) {
   }
 }
 
-document.getElementById("aprs-clear-btn").addEventListener("click", () => {
+document.getElementById("aprs-decode-toggle-btn").addEventListener("click", async () => {
+  try { await postPath("/toggle_aprs_decode"); } catch (e) { console.error("APRS toggle failed", e); }
+});
+
+document.getElementById("aprs-clear-btn").addEventListener("click", async () => {
   aprsPacketsEl.innerHTML = "";
   aprsPacketHistory = [];
   saveSetting("aprsPackets", []);
+  try { await postPath("/clear_aprs_decode"); } catch (e) { console.error("APRS clear failed", e); }
 });
 
 // Restore saved packets and map markers on page load

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

@@ -6,8 +6,13 @@ const cwToneInput = document.getElementById("cw-tone");
 const cwSignalIndicator = document.getElementById("cw-signal-indicator");
 const CW_MAX_LINES = 200;
 
-document.getElementById("cw-clear-btn").addEventListener("click", () => {
+document.getElementById("cw-decode-toggle-btn").addEventListener("click", async () => {
+  try { await postPath("/toggle_cw_decode"); } catch (e) { console.error("CW toggle failed", e); }
+});
+
+document.getElementById("cw-clear-btn").addEventListener("click", async () => {
   cwOutputEl.innerHTML = "";
+  try { await postPath("/clear_cw_decode"); } catch (e) { console.error("CW clear failed", e); }
 });
 
 // --- Server-side CW decode handler ---