feat: implement tabbed interface for room edit dialog

- Add General, Calendar, and Share tabs to organize room settings
- Move ICS settings to dedicated Calendar tab
- Move Zulip configuration to Share tab
- Keep basic room settings and webhooks in General tab
- Remove redundant migration file
- Fix Chakra UI v3 compatibility issues in calendar components

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

www/app/lib/apiHooks.ts

@@ -710,3 +710,20 @@ export function useRoomIcsStatus(roomName: string | null) {
     },
   );
 }
+
+export function useRoomCalendarEvents(roomName: string | null) {
+  const { isAuthenticated } = useAuthReady();
+
+  return $api.useQuery(
+    "get",
+    "/v1/rooms/{room_name}/meetings",
+    {
+      params: {
+        path: { room_name: roomName || "" },
+      },
+    },
+    {
+      enabled: !!roomName && isAuthenticated,
+    },
+  );
+}