Migrate frontend realtime messaging to SSE.

Switch service integrations and screen/store consumers from websocket events to SSE, and ignore generated dist-web artifacts.

Made-with: Cursor

src/navigation/types.ts

@@ -72,7 +72,12 @@ export type RootStackParamList = {
   Auth: undefined;
   PostDetail: { postId: string; scrollToComments?: boolean };
   UserProfile: { userId: string };
-  CreatePost: undefined;
+  CreatePost:
+    | undefined
+    | {
+        mode?: 'create' | 'edit';
+        postId?: string;
+      };
   Chat: {
     conversationId: string;
     userId?: string;