feat: implement real-time database synchronization with SSE and update backend modules

flutter/lib/features/profile/presentation/user_aliases_screen.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import '../../../core/api/api_error_mapper.dart';
+import '../../../core/realtime/realtime_sync.dart';
 import '../../admin/data/admin_repository.dart';
 import '../../admin/domain/receipt_alias.dart';
 
@@ -16,13 +17,27 @@ class _UserAliasesScreenState extends ConsumerState<UserAliasesScreen> {
   List<ReceiptAlias> _aliases = [];
   bool _isLoading = true;
   String? _error;
+  ProviderSubscription<int>? _realtimeTickSubscription;
 
   @override
   void initState() {
     super.initState();
+    _realtimeTickSubscription = ref.listenManual<int>(
+      realtimeRefreshTickProvider,
+      (_, __) {
+        if (!mounted) return;
+        _load();
+      },
+    );
     _load();
   }
 
+  @override
+  void dispose() {
+    _realtimeTickSubscription?.close();
+    super.dispose();
+  }
+
   Future<void> _load() async {
     setState(() {
       _isLoading = true;