[fix](trx-frontend-http): handle NoaaImage in snapshot and decode match

- Add noaa_decode_enabled to the fallback RigSnapshot initializer in api.rs
- Add NoaaImage arm (no-op) to the DecodedMessage match in audio.rs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

src/trx-client/trx-frontend/trx-frontend-http/src/api.rs

@@ -2485,6 +2485,7 @@ async fn wait_for_view(mut rx: watch::Receiver<RigState>) -> Result<RigSnapshot,
         ft4_decode_enabled: state.ft4_decode_enabled,
         ft2_decode_enabled: state.ft2_decode_enabled,
         wspr_decode_enabled: state.wspr_decode_enabled,
+        noaa_decode_enabled: state.noaa_decode_enabled,
         filter: state.filter.clone(),
         spectrum: None,
         vchan_rds: None,

src/trx-client/trx-frontend/trx-frontend-http/src/audio.rs

@@ -554,6 +554,7 @@ pub fn start_decode_history_collector(context: Arc<FrontendRuntimeContext>) {
                     DecodedMessage::Ft4(msg) => record_ft4(&context, msg),
                     DecodedMessage::Ft2(msg) => record_ft2(&context, msg),
                     DecodedMessage::Wspr(msg) => record_wspr(&context, msg),
+                    DecodedMessage::NoaaImage(_) => {}
                 },
                 Err(broadcast::error::RecvError::Lagged(_)) => continue,
                 Err(broadcast::error::RecvError::Closed) => break,