[feat](trx-rs): add marine mode scaffolding and VDES fallback

Keep weak VDES bursts visible by emitting unsynced diagnostic frames instead of dropping them, remove receiver badges from FT8 and WSPR history rows, and carry the current MARINE composite-mode scaffolding through the shared mode enums and backend mappings.

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

src/trx-server/src/main.rs

@@ -245,7 +245,7 @@ fn default_audio_bandwidth_for_mode(mode: &trx_core::rig::state::RigMode) -> u32
         RigMode::FM => 12_500,
         RigMode::WFM => 180_000,
         RigMode::AIS => 25_000,
-        RigMode::VDES => 100_000,
+        RigMode::VDES | RigMode::MARINE => 100_000,
         RigMode::Other(_) => 3_000,
     }
 }
@@ -268,6 +268,7 @@ fn parse_rig_mode(
         "FM" => RigMode::FM,
         "AIS" => RigMode::AIS,
         "VDES" => RigMode::VDES,
+        "MARINE" => RigMode::MARINE,
         "DIG" => RigMode::DIG,
         "PKT" => RigMode::PKT,
         _ => initial_mode.clone(),

src/trx-server/src/rig_task.rs

@@ -773,7 +773,9 @@ fn map_signal_strength(mode: &RigMode, raw: u8) -> i32 {
     // FT-817 returns 0-15 for signal strength
     // Map to approximate dBm / S-units
     match mode {
-        RigMode::FM | RigMode::WFM | RigMode::AIS | RigMode::VDES => -120 + (raw as i32 * 6),
+        RigMode::FM | RigMode::WFM | RigMode::AIS | RigMode::VDES | RigMode::MARINE => {
+            -120 + (raw as i32 * 6)
+        }
         _ => -127 + (raw as i32 * 6),
     }
 }

src/trx-server/trx-backend/trx-backend-ft450d/src/lib.rs

@@ -513,7 +513,7 @@ fn encode_mode(mode: &RigMode) -> DynResult<char> {
         RigMode::USB => Ok('2'),
         RigMode::CW => Ok('3'),
         RigMode::FM => Ok('4'),
-        RigMode::AIS | RigMode::VDES => Ok('4'),
+        RigMode::AIS | RigMode::VDES | RigMode::MARINE => Ok('4'),
         RigMode::AM => Ok('5'),
         RigMode::DIG => Ok('6'),
         RigMode::CWR => Ok('7'),

src/trx-server/trx-backend/trx-backend-ft817/src/lib.rs

@@ -590,7 +590,7 @@ fn encode_mode(mode: &RigMode) -> u8 {
         RigMode::AM => 0x04,
         RigMode::WFM => 0x06,
         RigMode::FM => 0x08,
-        RigMode::AIS | RigMode::VDES => 0x08,
+        RigMode::AIS | RigMode::VDES | RigMode::MARINE => 0x08,
         RigMode::DIG => 0x0A,
         RigMode::PKT => 0x0C,
         RigMode::Other(_) => 0x00,

src/trx-server/trx-backend/trx-backend-soapysdr/src/demod.rs

@@ -156,7 +156,7 @@ impl Demodulator {
             RigMode::AM => Self::Am,
             RigMode::FM => Self::Fm,
             RigMode::WFM => Self::Wfm,
-            RigMode::AIS | RigMode::VDES => Self::Fm,
+            RigMode::AIS | RigMode::VDES | RigMode::MARINE => Self::Fm,
             RigMode::CW | RigMode::CWR => Self::Cw,
             RigMode::DIG => Self::Passthrough,
             // VHF/UHF packet radio (APRS, AX.25) is FM-encoded AFSK.

src/trx-server/trx-backend/trx-backend-soapysdr/src/dsp/channel.rs

@@ -45,7 +45,7 @@ fn default_bandwidth_for_mode(mode: &RigMode) -> u32 {
         RigMode::FM => 12_500,
         RigMode::WFM => 180_000,
         RigMode::AIS => 25_000,
-        RigMode::VDES => 100_000,
+        RigMode::VDES | RigMode::MARINE => 100_000,
         RigMode::Other(_) => 3_000,
     }
 }

src/trx-server/trx-backend/trx-backend-soapysdr/src/lib.rs

@@ -58,7 +58,7 @@ impl SoapySdrRig {
         match mode {
             RigMode::LSB | RigMode::USB | RigMode::DIG => 3_000,
             RigMode::PKT | RigMode::AIS => 25_000,
-            RigMode::VDES => 100_000,
+            RigMode::VDES | RigMode::MARINE => 100_000,
             RigMode::CW | RigMode::CWR => 500,
             RigMode::AM => 9_000,
             RigMode::FM => 12_500,