Add actionable push notifications for iOS and Android

iOS:
- Add notification categories with action buttons (complete, view, cancel, etc.)
- Handle notification actions in AppDelegate with API calls
- Add navigation to specific task from notification tap
- Register UNNotificationCategory for each task state

Android:
- Add NotificationActionReceiver BroadcastReceiver for handling actions
- Update MyFirebaseMessagingService to show action buttons
- Add deep link handling in MainActivity for task navigation
- Register receiver in AndroidManifest.xml

Shared:
- Add navigateToTaskId parameter to App for cross-platform navigation
- Add notification observers in MainTabView/AllTasksView for refresh

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

iosApp/iosApp/MainTabView.swift

@@ -62,6 +62,17 @@ struct MainTabView: View {
         .onChange(of: authManager.isAuthenticated) { _ in
             selectedTab = 0
         }
+        // Handle push notification deep links - switch to appropriate tab
+        // The actual task navigation is handled by AllTasksView
+        .onReceive(NotificationCenter.default.publisher(for: .navigateToTask)) { _ in
+            selectedTab = 1 // Switch to Tasks tab
+        }
+        .onReceive(NotificationCenter.default.publisher(for: .navigateToEditTask)) { _ in
+            selectedTab = 1 // Switch to Tasks tab
+        }
+        .onReceive(NotificationCenter.default.publisher(for: .navigateToHome)) { _ in
+            selectedTab = 0 // Switch to Residences tab
+        }
     }
 }