修复了点击联系人信息发送消息的时候房间id绑定问题

src/composables/useWebRTC.ts

@@ -392,6 +392,11 @@ export function useWebRTC(userId: string, onIncomingCall?: (senderUserId: string
       call.status = 'connected'
       call.statusText = '通话中'
       startCallTimer()
+      // 确保 pc 已创建
+      if (!pc) {
+        await initMedia(call.type === 'video')
+        await createPC()
+      }
       const offer = await pc!.createOffer()
       await pc!.setLocalDescription(offer)
       sendSignal('offer', offer)
@@ -412,6 +417,11 @@ export function useWebRTC(userId: string, onIncomingCall?: (senderUserId: string
       startCallTimer()
 
     } else if (signal === 'answer') {
+      // 确保 pc 已创建
+      if (!pc) {
+        await initMedia(call.type === 'video')
+        await createPC()
+      }
       await pc!.setRemoteDescription(content)
       processPendingCandidates()