[feat](trx-rs): expose marine mode and ft8 live bar

Add an FT8 live overlay bar, align APRS top controls with the other decoder tabs, advertise MARINE in the SoapySDR mode list, and make the VDES decoder emit raw unsynced diagnostic frames instead of dropping weak bursts outright.

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

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

@@ -118,7 +118,7 @@ impl VdesDecoder {
             return None;
         }
 
-        let framed = extract_candidate_frame(&symbols)?;
+        let framed = extract_candidate_frame(&symbols).unwrap_or_else(|| fallback_frame_slice(&symbols));
         let rms = burst_rms(&samples);
         let mode = classify_vdes_burst(framed.symbols.len());
         let payload_symbols = framed.payload_symbols();
@@ -129,7 +129,7 @@ impl VdesDecoder {
                 &framed,
                 &mode,
                 rms,
-                &deinterleaved,
+                &framed.symbols,
             ));
         }
 
@@ -143,7 +143,7 @@ impl VdesDecoder {
                 &framed,
                 &mode,
                 rms,
-                &deinterleaved,
+                &framed.symbols,
             ));
         }
         let parsed = parse_vdes_payload(&decoded_bits);
@@ -345,14 +345,25 @@ fn extract_candidate_frame(symbols: &[u8]) -> Option<FrameSlice> {
     })
 }
 
+fn fallback_frame_slice(symbols: &[u8]) -> FrameSlice {
+    let take = symbols.len().min(TER_MCS1_100_BURST_SYMBOLS);
+    FrameSlice {
+        start_offset: 0,
+        sync_score: 0.0,
+        sync_errors: (TER_MCS1_100_SYNC_SYMBOLS * 2) as u8,
+        phase_rotation: 0,
+        symbols: symbols[..take].to_vec(),
+    }
+}
+
 fn build_unsynced_message(
     channel: &str,
     framed: &FrameSlice,
     mode: &BurstMode<'_>,
     rms: f32,
-    deinterleaved: &[u8],
+    raw_symbols: &[u8],
 ) -> VdesMessage {
-    let raw_bytes = pack_dibits_msb(deinterleaved);
+    let raw_bytes = pack_dibits_msb(raw_symbols);
     let sync_pct = framed.sync_score * 100.0;
     VdesMessage {
         ts_ms: None,
@@ -361,7 +372,7 @@ fn build_unsynced_message(
         repeat: 0,
         mmsi: 0,
         crc_ok: false,
-        bit_len: deinterleaved.len() * 2,
+        bit_len: raw_symbols.len() * 2,
         raw_bytes,
         lat: None,
         lon: None,