T5.1: PriorityMode enum + SetPriorityMode signal; extend QualityProfile with video fields

crates/wzp-client/src/call.rs

@@ -641,6 +641,7 @@ impl CallDecoder {
                 fec_ratio: 0.3,
                 frame_duration_ms: 20,
                 frames_per_block: 5,
+                ..QualityProfile::GOOD
             },
             CodecId::Opus6k => QualityProfile::DEGRADED,
             CodecId::Opus32k => QualityProfile::STUDIO_32K,
@@ -651,6 +652,7 @@ impl CallDecoder {
                 fec_ratio: 0.5,
                 frame_duration_ms: 20,
                 frames_per_block: 5,
+                ..QualityProfile::GOOD
             },
             CodecId::Codec2_1200 => QualityProfile::CATASTROPHIC,
             CodecId::ComfortNoise => QualityProfile::GOOD,

crates/wzp-client/src/featherchat.rs

@@ -141,9 +141,9 @@ pub fn signal_to_call_type(signal: &SignalMessage) -> CallSignalType {
         | SignalMessage::QualityCapability { .. } => CallSignalType::Offer, // quality negotiation
         SignalMessage::PresenceList { .. } => CallSignalType::Offer, // lobby presence
         SignalMessage::QualityDirective { .. } => CallSignalType::Offer, // relay-initiated
-        SignalMessage::Nack { .. } | SignalMessage::PictureLossIndication { .. } => {
-            CallSignalType::Offer
-        } // relay-initiated (video loss recovery)
+        SignalMessage::Nack { .. }
+        | SignalMessage::PictureLossIndication { .. }
+        | SignalMessage::SetPriorityMode { .. } => CallSignalType::Offer, // relay-initiated (video loss recovery)
     }
 }