[feat](trx-core): add WSPR decode plumbing across stack

Introduce WSPR command/state/protocol/transport wiring and integrate lifecycle, history, and frontend API paths mirroring the FT8 architecture.

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

src/trx-client/src/audio_client.rs

@@ -17,6 +17,7 @@ use tracing::{info, warn};
 use trx_core::audio::{
     read_audio_msg, write_audio_msg, AudioStreamInfo, AUDIO_MSG_APRS_DECODE, AUDIO_MSG_CW_DECODE,
     AUDIO_MSG_FT8_DECODE, AUDIO_MSG_RX_FRAME, AUDIO_MSG_STREAM_INFO, AUDIO_MSG_TX_FRAME,
+    AUDIO_MSG_WSPR_DECODE,
 };
 use trx_core::decode::DecodedMessage;
 
@@ -115,7 +116,10 @@ async fn handle_audio_connection(
                     let _ = rx_tx.send(Bytes::from(payload));
                 }
                 Ok((
-                    AUDIO_MSG_APRS_DECODE | AUDIO_MSG_CW_DECODE | AUDIO_MSG_FT8_DECODE,
+                    AUDIO_MSG_APRS_DECODE
+                    | AUDIO_MSG_CW_DECODE
+                    | AUDIO_MSG_FT8_DECODE
+                    | AUDIO_MSG_WSPR_DECODE,
                     payload,
                 )) => {
                     if let Ok(msg) = serde_json::from_slice::<DecodedMessage>(&payload) {