Add interactive iOS widget with subscription-based views

- Add direct API completion from widget via quick-complete endpoint
- Share auth token and API URL with widget via App Group UserDefaults
- Add dirty flag mechanism to refresh tasks when app returns from background
- Widget checkbox colors indicate priority (red=urgent, orange=high, yellow=medium, green=low)
- Show simple "X tasks waiting" view for free tier users when limitations enabled
- Show interactive task completion widget for premium users or when limitations disabled
- Sync subscription status with widget extension for view selection

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

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

iosApp/iosApp/Task/AllTasksView.swift

@@ -2,6 +2,7 @@ import SwiftUI
 import ComposeApp
 
 struct AllTasksView: View {
+    @Environment(\.scenePhase) private var scenePhase
     @StateObject private var taskViewModel = TaskViewModel()
     @StateObject private var residenceViewModel = ResidenceViewModel()
     @StateObject private var subscriptionCache = SubscriptionCacheWrapper.shared
@@ -98,7 +99,14 @@ struct AllTasksView: View {
             }
             .onAppear {
                 PostHogAnalytics.shared.screen(AnalyticsEvents.taskScreenShown)
-                loadAllTasks()
+
+                // Check if widget completed a task - force refresh if dirty
+                if WidgetDataManager.shared.areTasksDirty() {
+                    WidgetDataManager.shared.clearDirtyFlag()
+                    loadAllTasks(forceRefresh: true)
+                } else {
+                    loadAllTasks()
+                }
                 residenceViewModel.loadMyResidences()
             }
             // Handle push notification deep links
@@ -126,6 +134,15 @@ struct AllTasksView: View {
                     }
                 }
             }
+            // Check dirty flag when app returns from background (widget may have completed a task)
+            .onChange(of: scenePhase) { newPhase in
+                if newPhase == .active {
+                    if WidgetDataManager.shared.areTasksDirty() {
+                        WidgetDataManager.shared.clearDirtyFlag()
+                        loadAllTasks(forceRefresh: true)
+                    }
+                }
+            }
     }
 
     @ViewBuilder