Optimize subscription tier management and empty state logic

Changes:
- Make currentTier a computed property from StoreKit instead of stored value
- Initialize StoreKit at app launch and refresh on foreground for ready subscription status
- Fix empty state logic: show empty state when limit > 0, upgrade prompt when limit = 0
- Add subscription status display in Profile screen (iOS/Android)
- Add upgrade prompts to Residences and Tasks screens for free tier users
- Improve SubscriptionHelper with better tier checking logic

iOS:
- SubscriptionCache: currentTier now computed from StoreKit.purchasedProductIDs
- StoreKitManager: add refreshSubscriptionStatus() method
- AppDelegate: initialize StoreKit at launch and refresh on app active
- ContractorsListView: use shouldShowUpgradePrompt(currentCount:limitKey:)
- WarrantiesTabContent/DocumentsTabContent: same empty state fix
- ProfileTabView: display current tier and limitations status
- ResidencesListView/ResidenceDetailView: add upgrade prompts for free users
- AllTasksView: add upgrade prompt for free users

Android:
- ContractorsScreen/DocumentsScreen: fix empty state logic
- ProfileScreen: display subscription status and limits
- ResidencesScreen/ResidenceDetailScreen: add upgrade prompts
- UpgradeFeatureScreen: improve UI layout

Shared:
- APILayer: add getSubscriptionStatus() method
- SubscriptionHelper: add hasAccessToFeature() utility
- Remove duplicate subscription checking logic

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

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

iosApp/iosApp/Task/AllTasksView.swift

@@ -4,20 +4,28 @@ import ComposeApp
 struct AllTasksView: View {
     @StateObject private var taskViewModel = TaskViewModel()
     @StateObject private var residenceViewModel = ResidenceViewModel()
+    @StateObject private var subscriptionCache = SubscriptionCacheWrapper.shared
     @State private var tasksResponse: TaskColumnsResponse?
     @State private var isLoadingTasks = false
     @State private var tasksError: String?
     @State private var showAddTask = false
     @State private var showEditTask = false
+    @State private var showingUpgradePrompt = false
     @State private var selectedTaskForEdit: TaskDetail?
     @State private var selectedTaskForComplete: TaskDetail?
-    
+
     @State private var selectedTaskForArchive: TaskDetail?
     @State private var showArchiveConfirmation = false
-    
+
     @State private var selectedTaskForCancel: TaskDetail?
     @State private var showCancelConfirmation = false
 
+    // Count total tasks across all columns
+    private var totalTaskCount: Int {
+        guard let response = tasksResponse else { return 0 }
+        return response.columns.reduce(0) { $0 + $1.tasks.count }
+    }
+
     private var hasNoTasks: Bool {
         guard let response = tasksResponse else { return true }
         return response.columns.allSatisfy { $0.tasks.isEmpty }
@@ -46,6 +54,9 @@ struct AllTasksView: View {
                     loadAllTasks()
                 }
             }
+            .sheet(isPresented: $showingUpgradePrompt) {
+                UpgradePromptView(triggerKey: "add_11th_task", isPresented: $showingUpgradePrompt)
+            }
             .alert("Archive Task", isPresented: $showArchiveConfirmation) {
                 Button("Cancel", role: .cancel) {
                     selectedTaskForArchive = nil
@@ -129,7 +140,12 @@ struct AllTasksView: View {
                             .multilineTextAlignment(.center)
                         
                         Button(action: {
-                            showAddTask = true
+                            // Check if we should show upgrade prompt before adding
+                            if subscriptionCache.shouldShowUpgradePrompt(currentCount: totalTaskCount, limitKey: "tasks") {
+                                showingUpgradePrompt = true
+                            } else {
+                                showAddTask = true
+                            }
                         }) {
                             HStack(spacing: 8) {
                                 Image(systemName: "plus")
@@ -224,7 +240,12 @@ struct AllTasksView: View {
         .toolbar {
             ToolbarItem(placement: .navigationBarTrailing) {
                 Button(action: {
-                    showAddTask = true
+                    // Check if we should show upgrade prompt before adding
+                    if subscriptionCache.shouldShowUpgradePrompt(currentCount: totalTaskCount, limitKey: "tasks") {
+                        showingUpgradePrompt = true
+                    } else {
+                        showAddTask = true
+                    }
                 }) {
                     Image(systemName: "plus")
                 }