feat: integrate daily notification plugin for native iOS/Android

Add native notification support via @timesafari/daily-notification-plugin
while maintaining existing Web Push for web/PWA builds. Platform detection
automatically selects the appropriate notification system at runtime.

Key Changes:
- Created NotificationService abstraction layer with unified API
- Implemented NativeNotificationService for iOS/Android
- Stubbed WebPushNotificationService for future web integration
- Registered DailyNotificationPlugin in Capacitor plugin system

Android Configuration:
- Added notification permissions (POST_NOTIFICATIONS, SCHEDULE_EXACT_ALARM, etc.)
- Registered DailyNotificationReceiver for alarm-based notifications
- Registered BootReceiver to restore schedules after device restart
- Added Room, WorkManager, and Coroutines dependencies
- Registered plugin in MainActivity.java

iOS Configuration:
- Added UIBackgroundModes (fetch, processing) to Info.plist
- Configured BGTaskSchedulerPermittedIdentifiers
- Added NSUserNotificationAlertStyle

Documentation:
- Created comprehensive integration guide
- Added architecture overview with diagrams
- Created implementation checklist
- Documented platform-specific behavior

Manual Steps Required:
- iOS: Enable Background Modes capability in Xcode
- iOS: Run `pod install` to install CapacitorDailyNotification pod
- Run `npx cap sync` to sync native projects

Platform Support:
- iOS: Native UNUserNotificationCenter (requires Xcode setup)
- Android: Native NotificationManager with AlarmManager
- Web/PWA: Existing Web Push (coexists, not yet wired to service)
- Electron: Ready (uses native implementation)

Status: Phase 1 complete - infrastructure ready for UI integration
Next: Update PushNotificationPermission.vue to use NotificationService

android/app/build.gradle

@@ -101,6 +101,13 @@ dependencies {
     implementation project(':capacitor-android')
     implementation project(':capacitor-community-sqlite')
     implementation "androidx.biometric:biometric:1.2.0-alpha05"
+    
+    // Daily Notification Plugin dependencies
+    implementation "androidx.room:room-runtime:2.6.1"
+    implementation "androidx.work:work-runtime-ktx:2.9.0"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.7.3"
+    annotationProcessor "androidx.room:room-compiler:2.6.1"
+    
     testImplementation "junit:junit:$junitVersion"
     androidTestImplementation "androidx.test.ext:junit:$androidxJunitVersion"
     androidTestImplementation "androidx.test.espresso:espresso-core:$androidxEspressoCoreVersion"