fix: add timeout diagnostics

lib/watch_together/screens/watch_together_screen.dart

@@ -1,6 +1,7 @@
 import 'dart:io';
 
 import 'package:flutter/material.dart';
+import '../../utils/future_extensions.dart';
 import 'package:flutter/services.dart';
 import 'package:material_symbols_icons/symbols.dart';
 import 'package:provider/provider.dart';
@@ -91,7 +92,7 @@ class _NotInSessionViewState extends State<_NotInSessionView> {
       final client = HttpClient();
       client.connectionTimeout = const Duration(seconds: 5);
       final request = await client.getUrl(Uri.parse(WatchTogetherPeerService.healthUrl));
-      final response = await request.close().timeout(const Duration(seconds: 5));
+      final response = await request.close().namedTimeout(const Duration(seconds: 5), operation: 'WatchTogether health check');
       final body = await response.transform(const SystemEncoding().decoder).join();
       client.close();
       if (!mounted) return;

lib/watch_together/services/watch_together_peer_service.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:convert';
 
 import 'package:uuid/uuid.dart';
+import '../../utils/future_extensions.dart';
 import 'package:web_socket_channel/web_socket_channel.dart';
 
 import '../../services/base_peer_service.dart';
@@ -280,7 +281,7 @@ class WatchTogetherPeerService with KeepaliveMixin {
           _sendRaw({'type': 'join', 'sessionId': _sessionId, 'peerId': _myPeerId});
         }
 
-        await completer.future.timeout(const Duration(seconds: 10));
+        await completer.future.namedTimeout(const Duration(seconds: 10), operation: 'WatchTogether reconnect');
         appLogger.d('WatchTogether: Reconnected successfully');
       } catch (e) {
         appLogger.e('WatchTogether: Reconnect failed', error: e);