feat(call): migrate from WebRTC to LiveKit

Replace the custom WebRTC implementation with LiveKit for improved
stability and feature support.

- Remove `react-native-webrtc` and custom `WebRTCManager`
- Implement `LiveKitService` for room and track management
- Update `callStore` to handle LiveKit events and connection states
- Refactor `CallScreen` (mobile and web) to use `@livekit/react-native`
  and `VideoView`
- Update WebSocket protocol to use `call_ready` instead of manual SDP/ICE
  exchanges
- Add necessary camera and microphone permissions to `app.json`
- Update Metro and Babel configurations for LiveKit compatibility

src/services/core/wsService.ts

@@ -39,8 +39,7 @@ export type WSMessageType =
   | 'call_accepted'
   | 'call_rejected'
   | 'call_busy'
-  | 'call_sdp'
-  | 'call_ice'
+  | 'call_ready'
   | 'call_ended'
   | 'call_peer_muted'
   | 'call_invited'
@@ -56,20 +55,12 @@ export interface WSCallIncomingMessage {
   media_type?: string;
   created_at: number;
   lifetime?: number;
-  ice_servers?: ICEServerConfig[];
-}
-
-export interface ICEServerConfig {
-  urls: string[];
-  username?: string;
-  credential?: string;
 }
 
 export interface WSCallAcceptedMessage {
   type: 'call_accepted';
   call_id: string;
   started_at: number;
-  ice_servers?: ICEServerConfig[];
 }
 
 export interface WSCallRejectedMessage {
@@ -92,25 +83,6 @@ export interface WSCallEndedMessage {
   ended_at?: number;
 }
 
-export interface WSCallSDPMessage {
-  type: 'call_sdp';
-  call_id: string;
-  from_id: string;
-  payload: {
-    sdp_type: string;
-    sdp: string;
-  };
-}
-
-export interface WSCallICEMessage {
-  type: 'call_ice';
-  call_id: string;
-  from_id: string;
-  payload: {
-    candidate: string;
-  };
-}
-
 export interface WSCallPeerMutedMessage {
   type: 'call_peer_muted';
   call_id: string;
@@ -282,8 +254,6 @@ export type WSMessage =
   | WSCallRejectedMessage
   | WSCallBusyMessage
   | WSCallEndedMessage
-  | WSCallSDPMessage
-  | WSCallICEMessage
   | WSCallPeerMutedMessage
   | WSCallInvitedMessage
   | WSCallAnsweredElsewhereMessage
@@ -496,12 +466,6 @@ class WebSocketService {
       case 'call_busy':
         this.handleCallBusy(payload);
         break;
-      case 'call_sdp':
-        this.handleCallSDP(payload);
-        break;
-      case 'call_ice':
-        this.handleCallICE(payload);
-        break;
       case 'call_ended':
         this.handleCallEnded(payload);
         break;
@@ -664,7 +628,6 @@ class WebSocketService {
       call_type: payload.media_type || payload.call_type,
       created_at: payload.created_at,
       lifetime: payload.lifetime,
-      ice_servers: payload.ice_servers,
     };
     this.emit('call_incoming', m);
   }
@@ -674,7 +637,6 @@ class WebSocketService {
       type: 'call_accepted',
       call_id: payload.call_id,
       started_at: payload.started_at,
-      ice_servers: payload.ice_servers,
     };
     this.emit('call_accepted', m);
   }
@@ -696,26 +658,6 @@ class WebSocketService {
     this.emit('call_busy', m);
   }
 
-  private handleCallSDP(payload: any): void {
-    const m: WSCallSDPMessage = {
-      type: 'call_sdp',
-      call_id: payload.call_id,
-      from_id: payload.from_id,
-      payload: payload.payload,
-    };
-    this.emit('call_sdp', m);
-  }
-
-  private handleCallICE(payload: any): void {
-    const m: WSCallICEMessage = {
-      type: 'call_ice',
-      call_id: payload.call_id,
-      from_id: payload.from_id,
-      payload: payload.payload,
-    };
-    this.emit('call_ice', m);
-  }
-
   private handleCallEnded(payload: any): void {
     const m: WSCallEndedMessage = {
       type: 'call_ended',
@@ -793,21 +735,6 @@ class WebSocketService {
     this.sendFireAndForget('call_busy', { call_id: callId });
   }
 
-  sendCallSDP(callId: string, sdpType: string, sdp: string): void {
-    this.sendFireAndForget('call_sdp', {
-      call_id: callId,
-      sdp_type: sdpType,
-      sdp,
-    });
-  }
-
-  sendCallICE(callId: string, candidate: string): void {
-    this.sendFireAndForget('call_ice', {
-      call_id: callId,
-      candidate,
-    });
-  }
-
   sendCallEnd(callId: string, reason?: string): void {
     this.sendFireAndForget('call_end', { call_id: callId, reason });
   }
@@ -816,6 +743,10 @@ class WebSocketService {
     this.sendFireAndForget('call_mute', { call_id: callId, muted });
   }
 
+  sendCallReady(callId: string): void {
+    this.sendFireAndForget('call_ready', { call_id: callId });
+  }
+
   private handleMessageSent(payload: any): void {
     // 找到对应的发送请求并resolve
     const pendingMsg = this.pendingMessages.find(p =>