[feat](trx-rs): remap decoder modes — remove DIG/PKT from SDR, wire decoders to standard modes

For SDR backends, DIG and PKT are removed from supported_modes and
replaced by USB and FM respectively. CAT backends (FT-817, FT-450D)
retain DIG/PKT as before.

Decoder mode allowances updated:
- APRS: FM | PKT (was PKT only)
- HF-APRS: USB | DIG (was DIG only)
- AIS: AIS | FM | PKT (was AIS only)
- VDES: VDES | FM (was VDES only)
- FT8/FT4/FT2/WSPR: USB | DIG (unchanged)
- CW: CW | CWR (unchanged)
- LRPT: FM (unchanged, mode-independent)

Frontend status text, bookmark decoder toggles, background-decode
fallbacks, and scheduler wiring updated to match.

https://claude.ai/code/session_01DCAaMH8RF5FNB2gRtVu4pY
Signed-off-by: Claude <noreply@anthropic.com>

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

@@ -3241,22 +3241,22 @@ function render(update) {
   const wsprStatus = document.getElementById("wspr-status");
   setModeBoundDecodeStatus(
     aisStatus,
-    ["AIS"],
-    "Select AIS mode to decode",
+    ["AIS", "FM", "PKT"],
+    "Select AIS or FM mode to decode",
     "Connected, listening for packets",
   );
   if (window.updateAisBar) window.updateAisBar();
   setModeBoundDecodeStatus(
     vdesStatus,
-    ["VDES"],
-    "Select VDES mode to decode",
+    ["VDES", "FM"],
+    "Select VDES or FM mode to decode",
     "Connected, listening for bursts",
   );
   if (window.updateVdesBar) window.updateVdesBar();
   setModeBoundDecodeStatus(
     aprsStatus,
-    ["PKT"],
-    "Select PKT mode to decode",
+    ["PKT", "FM"],
+    "Select FM mode to decode",
     "Connected, listening for packets",
   );
   if (window.updateAprsBar) window.updateAprsBar();
@@ -8903,10 +8903,10 @@ function updateDecodeStatus(text) {
   const ft8 = document.getElementById("ft8-status");
   const ft4 = document.getElementById("ft4-status");
   const ft2 = document.getElementById("ft2-status");
-  setModeBoundDecodeStatus(ais, ["AIS"], "Select AIS mode to decode", text);
+  setModeBoundDecodeStatus(ais, ["AIS", "FM", "PKT"], "Select AIS or FM mode to decode", text);
   const vdesText = text === "Connected, listening for packets" ? "Connected, listening for bursts" : text;
-  setModeBoundDecodeStatus(vdes, ["VDES"], "Select VDES mode to decode", vdesText);
-  setModeBoundDecodeStatus(aprs, ["PKT"], "Select PKT mode to decode", text);
+  setModeBoundDecodeStatus(vdes, ["VDES", "FM"], "Select VDES or FM mode to decode", vdesText);
+  setModeBoundDecodeStatus(aprs, ["PKT", "FM"], "Select FM mode to decode", text);
   const cwText = text === "Connected, listening for packets" ? "Connected, listening for CW" : text;
   setModeBoundDecodeStatus(cw, ["CW", "CWR"], "Select CW mode to decode", cwText);
   if (ft8 && ft8.textContent !== "Receiving") ft8.textContent = text;

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

@@ -449,14 +449,13 @@
               <input type="number" id="bm-freq" class="status-input" required min="0" placeholder="e.g. 7074000" />
             </label>
             <label class="bm-label">Mode
-              <input type="text" id="bm-mode" class="status-input" list="bm-mode-list" required placeholder="e.g. DIG" />
+              <input type="text" id="bm-mode" class="status-input" list="bm-mode-list" required placeholder="e.g. USB" />
               <datalist id="bm-mode-list">
                 <option value="LSB">
                 <option value="USB">
                 <option value="AM">
                 <option value="SAM">
                 <option value="FM">
-                <option value="DIG">
                 <option value="CW">
                 <option value="WFM">
               </datalist>
@@ -561,25 +560,25 @@
         <div class="plugin-item">
           <strong>FT8 Decoder</strong>
           <div style="color:var(--text-muted); font-size:0.85rem; margin-top:0.2rem;">
-            Decodes FT8 messages from RX audio (DIG/USB only, toggle required).
+            Decodes FT8 messages from RX audio (USB only, toggle required).
           </div>
         </div>
         <div class="plugin-item">
           <strong>FT4 Decoder</strong>
           <div style="color:var(--text-muted); font-size:0.85rem; margin-top:0.2rem;">
-            Decodes FT4 messages from RX audio (DIG/USB only, toggle required). 7.5-second slots.
+            Decodes FT4 messages from RX audio (USB only, toggle required). 7.5-second slots.
           </div>
         </div>
         <div class="plugin-item">
           <strong>FT2 Decoder</strong>
           <div style="color:var(--text-muted); font-size:0.85rem; margin-top:0.2rem;">
-            Decodes FT2 messages from RX audio (DIG/USB only, toggle required). 3.75-second slots.
+            Decodes FT2 messages from RX audio (USB only, toggle required). 3.75-second slots.
           </div>
         </div>
         <div class="plugin-item">
           <strong>WSPR Decoder</strong>
           <div style="color:var(--text-muted); font-size:0.85rem; margin-top:0.2rem;">
-            Decodes WSPR messages from RX audio (DIG/USB only, toggle required).
+            Decodes WSPR messages from RX audio (USB only, toggle required).
           </div>
         </div>
         <div class="plugin-item">

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

@@ -322,7 +322,8 @@ function renderAprsHistory() {
 
 function updateAprsBar() {
   if (!aprsBarOverlay) return;
-  const isPkt = (document.getElementById("mode")?.value || "").toUpperCase() === "PKT";
+  const modeVal = (document.getElementById("mode")?.value || "").toUpperCase();
+  const isPkt = modeVal === "PKT" || modeVal === "FM";
   const cutoffMs = Date.now() - APRS_BAR_WINDOW_MS;
   const okFrames = aprsPacketHistory.filter((p) => p.crcOk && p._tsMs >= cutoffMs);
   const frames = collapseAprsDuplicates(okFrames).slice(0, 8);

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

@@ -102,7 +102,7 @@
     if (supported.length > 0) return supported;
     const mode = String(bookmark && bookmark.mode || "").trim().toUpperCase();
     if (mode === "AIS") return ["ais"];
-    if (mode === "PKT") return ["aprs"];
+    if (mode === "PKT" || mode === "FM") return ["aprs"];
     return supported;
   }
 

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

@@ -428,9 +428,9 @@ async function bmApply(bm) {
         await postPath("/set_freq?hz=" + bm.freq_hz);
       }
     })();
-    // Decoder toggles (DIG / FM modes) — also fire-and-forget.
+    // Decoder toggles (USB / DIG / FM / PKT modes) — also fire-and-forget.
     const hasDecoders = Array.isArray(bm.decoders) && bm.decoders.length > 0;
-    const decoderMode = bm.mode === "DIG" || bm.mode === "FM";
+    const decoderMode = bm.mode === "USB" || bm.mode === "DIG" || bm.mode === "FM" || bm.mode === "PKT";
     const decoderPromise = (hasDecoders && decoderMode) ? (async () => {
       const statusResp = await fetch("/status");
       if (statusResp.ok) {