Fix voice recording and notification issues

- Fix mic button gesture handling by removing Button wrapper
  - Use direct gesture on ZStack for more reliable touch detection
  - Add debug logging for recording start/stop

- Fix notification delivery on iOS
  - Change from checking .background to checking != .active
  - Notifications now work when app is inactive or background
  - Add NSUserNotificationsUsageDescription to Info.plist

- Improve voice note fragment transmission
  - Reduce fragment size from 400 to 200 bytes for better reliability
  - Simplify fragment timing from batch-based to linear 100ms delays
  - Lower packet size threshold from 512 to 400 bytes for fragmentation
  - Add peripheral connection state checking before writes
  - Better error logging throughout transmission pipeline

- Add comprehensive debug logging for troubleshooting
  - Log audio file size and duration
  - Log peripheral connection states during broadcast
  - Log fragment send progress with timing info

bitchat/Services/NotificationService.swift

@@ -25,11 +25,14 @@ class NotificationService {
     
     func sendLocalNotification(title: String, body: String, identifier: String) {
         #if os(iOS)
-        guard UIApplication.shared.applicationState == .background else {
-            print("[NOTIFICATIONS] App is in foreground, skipping notification")
+        // Send notification if app is not active (background or inactive)
+        guard UIApplication.shared.applicationState != .active else {
+            print("[NOTIFICATIONS] App is active/foreground, skipping notification")
             return
         }
         
+        print("[NOTIFICATIONS] App state: \(UIApplication.shared.applicationState.rawValue), sending notification")
+        
         let content = UNMutableNotificationContent()
         content.title = title
         content.body = body