Rebrand the entire application from "胡萝卜社区" (Carrot BBS) to "威友" (WithYou), including:

- Update app name, package name (skin.carrot.bbs → cn.qczlit.withyou), and bundle identifier
- Update API endpoints (bbs.littlelan.cn → withyou.littlelan.cn)
- Update URL scheme (carrotbbs:// → withyou://)
- Rename database from carrot_bbs to with_you
- Update CI/CD pipeline image names and artifact naming
- Add Android signing configuration for release builds
- Update all UI text and comments throughout the codebase
- Refactor registerStore to use in-memory state instead of AsyncStorage persistence
- Improve WebRTC track handling and call stream management
- Add metro platform resolution for native platform support

BREAKING app package, database, and URLs are no longer valid

src/stores/call/callStore.ts

@@ -146,13 +146,20 @@ function setupWebRTCEvents(callId: string, myUserId: string): void {
  * Handle remote stream with video track detection
  */
 function handleRemoteStream(stream: MediaStream): void {
-  callStore.setState({ peerStream: stream });
+  // Create a new MediaStream instance to force zustand subscribers to update
+  // because react-native-webrtc may add tracks to the same stream object reference
+  const newStream = new MediaStream();
+  stream.getTracks().forEach((track) => {
+    newStream.addTrack(track);
+  });
+
+  callStore.setState({ peerStream: newStream });
 
   // Detect video tracks in remote stream
-  const videoTracks = stream.getVideoTracks();
+  const videoTracks = newStream.getVideoTracks();
   const hasPeerVideo = videoTracks.length > 0 && videoTracks.some((t) => t.enabled);
 
-  console.log('[CallStore] Remote stream received, hasVideo:', hasPeerVideo, 'videoTracks:', videoTracks.length);
+  console.log('[CallStore] Remote stream received, hasVideo:', hasPeerVideo, 'videoTracks:', videoTracks.length, 'audioTracks:', newStream.getAudioTracks().length);
 
   callStore.setState((s) => ({
     currentCall: s.currentCall