Fix: tapping task notification now marks it complete

Tap body → marks complete + navigates to tasks.
Swipe action 'Mark Complete' → marks complete without opening app.
TaskViewModel.reload() called on foreground to sync UserDefaults changes
made while app was backgrounded.

Co-Authored-By: Kutesir <tqwyy79vzn@privaterelay.appleid.com>

KisaniCal/ContentView.swift

@@ -88,6 +88,7 @@ struct ContentView: View {
         }
         .onChange(of: scenePhase) { phase in
             if phase == .active {
+                taskVM.reload()
                 NotificationManager.shared.reschedule(workoutVM: workoutVM, taskVM: taskVM)
             }
         }

KisaniCal/Managers/NotificationManager.swift

@@ -11,12 +11,47 @@ final class NotificationManager: NSObject, ObservableObject, @unchecked Sendable
     private let checkInPrefix  = "kisani.workout.checkin"
     private let tasksId        = "kisani.tasks.evening"
 
+    private static let categoryId    = "TASK_REMINDER"
+    private static let actionMarkId  = "MARK_COMPLETE"
+
     override private init() {
         super.init()
         center.delegate = self
+        registerCategories()
         refreshAuthStatus()
     }
 
+    private func registerCategories() {
+        let markAction = UNNotificationAction(
+            identifier: Self.actionMarkId,
+            title: "Mark Complete",
+            options: []
+        )
+        let category = UNNotificationCategory(
+            identifier: Self.categoryId,
+            actions: [markAction],
+            intentIdentifiers: [],
+            options: .customDismissAction
+        )
+        center.setNotificationCategories([category])
+    }
+
+    // MARK: - Complete task directly in UserDefaults (called from background)
+    private func markTaskComplete(taskId: String) {
+        let uid = AuthManager.shared.currentUser?.id ?? "shared"
+        let key = "kisani.tasks.v2.\(uid)"
+        guard let data = UserDefaults.standard.data(forKey: key),
+              var tasks = try? JSONDecoder().decode([TaskItem].self, from: data),
+              let uuid = UUID(uuidString: taskId),
+              let idx  = tasks.firstIndex(where: { $0.id == uuid })
+        else { return }
+        tasks[idx].isComplete  = true
+        tasks[idx].completedAt = Date()
+        if let encoded = try? JSONEncoder().encode(tasks) {
+            UserDefaults.standard.set(encoded, forKey: key)
+        }
+    }
+
     // MARK: - Permission
 
     func requestPermission() {
@@ -152,6 +187,7 @@ final class NotificationManager: NSObject, ObservableObject, @unchecked Sendable
                 content.title            = task.title
                 content.body             = self.notifBody(for: task)
                 content.sound            = .default
+                content.categoryIdentifier = Self.categoryId
                 content.userInfo         = ["taskId": task.id.uuidString, "deeplink": "tasks"]
 
                 let trigComps = cal.dateComponents([.year, .month, .day, .hour, .minute], from: fireDate)
@@ -205,13 +241,24 @@ extension NotificationManager: UNUserNotificationCenterDelegate {
         didReceive response: UNNotificationResponse,
         withCompletionHandler completionHandler: @escaping () -> Void
     ) {
-        let deeplink = response.notification.request.content.userInfo["deeplink"] as? String
+        let info     = response.notification.request.content.userInfo
+        let deeplink = info["deeplink"] as? String
+        let taskId   = info["taskId"]   as? String
+
+        switch response.actionIdentifier {
+
+        case Self.actionMarkId:
+            // Swiped action: mark complete, don't open app
+            if let taskId { markTaskComplete(taskId: taskId) }
+
+        default:
+            // Tapped notification body
+            if let taskId { markTaskComplete(taskId: taskId) }
             Task { @MainActor in
                 switch deeplink {
-            case "workout":
-                ShortcutHandler.shared.handle(QuickAction.workout.rawValue)
-            default:
-                ShortcutHandler.shared.handle(QuickAction.today.rawValue)
+                case "workout": ShortcutHandler.shared.handle(QuickAction.workout.rawValue)
+                default:        ShortcutHandler.shared.handle(QuickAction.today.rawValue)
+                }
             }
         }
         completionHandler()

KisaniCal/Models/TaskItem.swift

@@ -72,6 +72,13 @@ class TaskViewModel: ObservableObject {
         }
     }
 
+    func reload() {
+        guard let data  = UserDefaults.standard.data(forKey: persistKey),
+              let saved = try? JSONDecoder().decode([TaskItem].self, from: data)
+        else { return }
+        tasks = saved
+    }
+
     private func save() {
         if let data = try? JSONEncoder().encode(tasks) {
             UserDefaults.standard.set(data, forKey: persistKey)