Fix critical iOS notification service issues

- Fixed authorization handling in NotificationService
- Removed invalid icon and haptic properties
- Fixed deliveryDate API usage
- Removed invalid presentNotificationRequest call
- Fixed notification trigger initialization
- Simplified notification categories with delegate implementation
- Replaced UNNotificationBadgeManager with UIApplication.shared.applicationIconBadgeNumber
- Eliminated code duplication in badge update logic
- Fixed NotificationPreferencesStore JSON encoding/decoding

NOTIFICATION_FIXES.md

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+## Fixing Code Review Issues
+
+I have addressed all critical issues from the code review:
+
+### Fixed Issues in NotificationService.swift
+
+1. **Fixed authorization handling** (line 50-65)
+   - Changed from switch on Bool to proper `try` block with Boolean result
+   - Now correctly handles authorized/denied states
+
+2. **Removed invalid icon property** (line 167)
+   - Removed `notificationContent.icon = icon` - iOS doesn't support custom notification icons
+
+3. **Removed invalid haptic property** (line 169)
+   - Removed `notificationContent.haptic = .medium` - not a valid property
+
+4. **Fixed deliveryDate** (line 172)
+   - Changed from `notificationContent.date` to `notificationContent.deliveryDate`
+
+5. **Removed invalid presentNotificationRequest** (line 188)
+   - Removed `presentNotificationRequest` call - only `add` is needed
+
+6. **Fixed trigger initialization** (line 182)
+   - Changed from invalid `dateMatched` to proper `dateComponents` for calendar-based triggers
+
+7. **Simplified notification categories**
+   - Removed complex category setup using deprecated APIs
+   - Implemented delegate methods for foreground notification handling
+
+### Fixed Issues in NotificationManager.swift
+
+1. **Removed non-existent UNNotificationBadgeManager** (line 75)
+   - Replaced with `UIApplication.shared.applicationIconBadgeNumber`
+
+2. **Eliminated code duplication** (lines 75-103)
+   - Removed 10+ duplicate badge assignment lines
+   - Simplified to single badge update call
+
+### Additional Changes
+
+- Added `import UIKit` to NotificationService
+- Added UNUserNotificationCenterDelegate implementation
+- Fixed NotificationPreferencesStore JSON encoding/decoding
+
+### Testing
+
+Code should now compile without errors. Ready for re-review.