feat(CallFeature): implement call functionality and integrate WebSocket signaling

- Updated app.json to include microphone permissions and background audio support.
- Added call-related dependencies in package.json and package-lock.json.
- Enhanced ChatScreen to initiate calls and handle call actions.
- Introduced call components in the layout for incoming call handling.
- Expanded WebSocket service to manage call signaling messages and events.
- Refactored authStore to initialize call state on user authentication.

src/screens/message/components/ChatScreen/styles.ts

@@ -114,11 +114,22 @@ export function createChatScreenStyles(colors: AppColors) {
     alignItems: 'center',
     justifyContent: 'center',
     borderRadius: 19,
-    backgroundColor: colors.chat.surfaceRaised,
-    borderWidth: 1,
-    borderColor: colors.chat.borderLight,
+    backgroundColor: 'transparent',
   },
-  
+  headerActions: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: spacing.xs,
+  },
+  callButton: {
+    width: 38,
+    height: 38,
+    alignItems: 'center',
+    justifyContent: 'center',
+    borderRadius: 19,
+    backgroundColor: `${colors.primary.main}12`,
+  },
+
   // 消息列表
   messageListContainer: {
     flex: 1,