feat(android): implement Phase 2.2 Android exact alarm fallback completion

- Add DailyNotificationExactAlarmManager with SCHEDULE_EXACT_ALARM permission handling
- Add DailyNotificationRebootRecoveryManager for system reboot and time-change recovery
- Update DailyNotificationScheduler with exact alarm manager integration
- Add exact alarm status checking and permission request methods
- Add windowed alarm fallback (±10m) when exact alarms are denied
- Add deep-link to exact alarm settings for user guidance
- Add reboot recovery with broadcast receiver registration
- Update TypeScript interface with new exact alarm and recovery methods
- Update web implementations with placeholder methods
- Add phase2-2-android-fallback.ts usage examples

This completes Phase 2.2 Android fallback implementation:
- Exact alarm permission handling with graceful fallback
- Windowed alarm support (±10m) for battery optimization
- Reboot and time-change recovery with broadcast receivers
- Deep-link to exact alarm settings for user enablement
- Integration with existing TTL enforcement and rolling window
- Comprehensive fallback scenarios and error handling

Files: 7 changed, 1200+ insertions(+)

src/web/index.ts

@@ -40,6 +40,44 @@ export class DailyNotificationWeb implements DailyNotificationPlugin {
       timeUntilNextMaintenance: 0
     };
   }
+  
+  async getExactAlarmStatus(): Promise<{
+    supported: boolean;
+    enabled: boolean;
+    canSchedule: boolean;
+    fallbackWindow: string;
+  }> {
+    console.log('Get exact alarm status called on web platform');
+    return {
+      supported: false,
+      enabled: false,
+      canSchedule: false,
+      fallbackWindow: 'Not applicable on web'
+    };
+  }
+  
+  async requestExactAlarmPermission(): Promise<void> {
+    console.log('Request exact alarm permission called on web platform');
+  }
+  
+  async openExactAlarmSettings(): Promise<void> {
+    console.log('Open exact alarm settings called on web platform');
+  }
+  
+  async getRebootRecoveryStatus(): Promise<{
+    inProgress: boolean;
+    lastRecoveryTime: number;
+    timeSinceLastRecovery: number;
+    recoveryNeeded: boolean;
+  }> {
+    console.log('Get reboot recovery status called on web platform');
+    return {
+      inProgress: false,
+      lastRecoveryTime: 0,
+      timeSinceLastRecovery: 0,
+      recoveryNeeded: false
+    };
+  }
 
   /**
    * Schedule a daily notification