[feat](trx-server): integrate wsprd-based WSPR decoding

Add a new trx-wspr crate that wraps wsprd slot decoding and parsed
results, wire it into the server audio pipeline, and emit WSPR decode
events to clients.

Also add frontend event routing for WSPR decode messages and temporary
rendering in the FT8 table until a dedicated WSPR panel is introduced.

Co-authored-by: Codex <codex@openai.com>
Signed-off-by: Stanislaw Grams <stanislawgrams@gmail.com>

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

@@ -1267,6 +1267,7 @@ function connectDecode() {
       if (msg.type === "aprs" && window.onServerAprs) window.onServerAprs(msg);
       if (msg.type === "cw" && window.onServerCw) window.onServerCw(msg);
       if (msg.type === "ft8" && window.onServerFt8) window.onServerFt8(msg);
+      if (msg.type === "wspr" && window.onServerWspr) window.onServerWspr(msg);
     } catch (e) {
       // ignore parse errors
     }

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

@@ -149,3 +149,15 @@ window.onServerFt8 = function(msg) {
     message: msg.message,
   });
 };
+
+// Reuse FT8 table rendering for WSPR until a dedicated WSPR panel is added.
+window.onServerWspr = function(msg) {
+  ft8Status.textContent = "Receiving";
+  addFt8Message({
+    ts_ms: msg.ts_ms,
+    snr_db: msg.snr_db,
+    dt_s: msg.dt_s,
+    freq_hz: msg.freq_hz,
+    message: `[WSPR] ${msg.message}`,
+  });
+};