Implement UNUserNotificationCenterDelegate in AppDelegate to display
notifications when app is in foreground. Add visual feedback indicator
in test app UI to confirm notification delivery.
Changes:
- AppDelegate: Conform to UNUserNotificationCenterDelegate protocol
- AppDelegate: Implement willPresent and didReceive delegate methods
- AppDelegate: Set delegate at multiple lifecycle points to ensure
it's always active (immediate, after Capacitor init, on app active)
- UI: Add notification received indicator in status card
- UI: Add periodic check for notification delivery (every 5 seconds)
- UI: Add instructions on where to look for notification banner
- Docs: Add IOS_LOGGING_GUIDE.md for debugging iOS logs
This fixes the issue where scheduled notifications were not visible
when the app was in the foreground. The delegate method now properly
presents notifications with banner, sound, and badge options.
Verified working: Logs show delegate method called successfully when
notification fires, with proper presentation options set.
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