feat: Add auto-sync, fix partner linking UI, update sharing settings

- Add 10-second periodic auto-sync to CycleEntriesNotifier
- Fix husband_devotional_screen: use partnerId for isConnected check, navigate to SharingSettingsScreen instead of legacy mock dialog
- Remove obsolete _showConnectDialog method and mock data import
- Update husband_settings_screen: show 'Partner Settings' with linked partner name when connected
- Add SharingSettingsScreen: Pad Supplies toggle (disabled when pad tracking off), Intimacy always enabled
- Add CORS OPTIONS handler to backend server
- Add _ensureServerRegistration for reliable partner linking
- Add copy button to Invite Partner dialog
- Dynamic base URL for web (uses window.location.hostname)

lib/main.dart

@@ -10,6 +10,7 @@ import 'screens/husband/husband_home_screen.dart';
 import 'models/user_profile.dart';
 import 'models/cycle_entry.dart';
 import 'models/teaching_plan.dart';
+import 'models/prayer_request.dart';
 import 'models/scripture.dart';
 import 'providers/user_provider.dart';
 import 'app_startup.dart';
@@ -36,6 +37,7 @@ void main() async {
   Hive.registerAdapter(SupplyItemAdapter());
   Hive.registerAdapter(PadTypeAdapter());
   Hive.registerAdapter(TeachingPlanAdapter());
+  Hive.registerAdapter(PrayerRequestAdapter());
 
   runApp(const ProviderScope(child: AppStartupWidget()));
 }