Merge main into PR #621 (ChatGPT OAuth for Realtime voice)

Resolve conflicts with the voice-core captions, panel resize and MCP
panel key changes by keeping both sides.

src/voice/realtimeBackend.js

@@ -64,6 +64,8 @@ export function createRealtimeBackend({
           data?.session?.model ||
           null,
         tier: response.headers?.get?.('X-GEV-Voice-Tier') || null,
+        transcribeModel:
+          response.headers?.get?.('X-GEV-Voice-Transcribe-Model') || null,
         expiresAt,
       };
     },