Refactor iOS forms and integrate notification API with APILayer

- Refactored ContractorFormSheet to follow SwiftUI best practices
  - Moved Field enum outside struct and renamed to ContractorFormField
  - Extracted body into computed properties for better readability
  - Replaced deprecated NavigationView with NavigationStack
  - Fixed input field contrast in light mode by adding borders
  - Fixed force cast in loadContractorSpecialties

- Refactored TaskFormView to eliminate screen flickering
  - Moved Field enum outside struct and renamed to TaskFormField
  - Fixed conditional view structure that caused flicker on load
  - Used ZStack with overlay instead of if/else for loading state
  - Changed to .task modifier for proper async initialization
  - Made loadLookups properly async and fixed force casts
  - Replaced deprecated NavigationView with NavigationStack

- Integrated PushNotificationManager with APILayer
  - Updated registerDeviceWithBackend to use APILayer.shared.registerDevice()
  - Updated updateNotificationPreferences to use APILayer
  - Updated getNotificationPreferences to use APILayer
  - Added proper error handling with try-catch pattern

- Added notification operations to APILayer
  - Added NotificationApi instance
  - Implemented registerDevice, unregisterDevice
  - Implemented getNotificationPreferences, updateNotificationPreferences
  - Implemented getNotificationHistory, markNotificationAsRead
  - Implemented markAllNotificationsAsRead, getUnreadCount
  - All methods follow consistent pattern with auth token handling

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

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

iosApp/iosApp/PushNotifications/PushNotificationManager.swift

@@ -1,4 +1,5 @@
 import Foundation
+import UIKit
 import UserNotifications
 import ComposeApp
 
@@ -8,8 +9,6 @@ class PushNotificationManager: NSObject, ObservableObject {
     @Published var deviceToken: String?
     @Published var notificationPermissionGranted = false
 
-//    private let notificationApi = NotificationApi()
-
     override init() {
         super.init()
     }
@@ -19,26 +18,25 @@ class PushNotificationManager: NSObject, ObservableObject {
     func requestNotificationPermission() async -> Bool {
         let center = UNUserNotificationCenter.current()
 
-//        do {
-//            let granted = try await center.requestAuthorization(options: [.alert, .sound, .badge])
-//            notificationPermissionGranted = granted
-//
-//            if granted {
-//                print("✅ Notification permission granted")
-//                // Register for remote notifications on main thread
-//                await MainActor.run {
-//                    UIApplication.shared.registerForRemoteNotifications()
-//                }
-//            } else {
-//                print("❌ Notification permission denied")
-//            }
-//
-//            return granted
-//        } catch {
-//            print("❌ Error requesting notification permission: \(error)")
-//            return false
-//        }
-        return true
+        do {
+            let granted = try await center.requestAuthorization(options: [.alert, .sound, .badge])
+            notificationPermissionGranted = granted
+
+            if granted {
+                print("✅ Notification permission granted")
+                // Register for remote notifications on main thread
+                await MainActor.run {
+                    UIApplication.shared.registerForRemoteNotifications()
+                }
+            } else {
+                print("❌ Notification permission denied")
+            }
+
+            return granted
+        } catch {
+            print("❌ Error requesting notification permission: \(error)")
+            return false
+        }
     }
 
     // MARK: - Token Management
@@ -61,26 +59,29 @@ class PushNotificationManager: NSObject, ObservableObject {
     // MARK: - Backend Registration
 
     private func registerDeviceWithBackend(token: String) async {
-        guard let authToken = TokenStorage.shared.getToken() else {
+        guard TokenStorage.shared.getToken() != nil else {
             print("⚠️ No auth token available, will register device after login")
             return
         }
 
-//        let request = DeviceRegistrationRequest(
-//            registrationId: token,
-//            platform: "ios"
-//        )
-//
-//        let result = await notificationApi.registerDevice(token: authToken, request: request)
-//
-//        switch result {
-//        case let success as ApiResultSuccess<DeviceRegistrationResponse>:
-//            print("✅ Device registered successfully: \(success.data)")
-//        case let error as ApiResultError:
-//            print("❌ Failed to register device: \(error.message)")
-//        default:
-//            print("⚠️ Unexpected result type from device registration")
-//        }
+        let request = DeviceRegistrationRequest(
+            registrationId: token,
+            platform: "ios"
+        )
+
+        do {
+            let result = try await APILayer.shared.registerDevice(request: request)
+
+            if let success = result as? ApiResultSuccess<DeviceRegistrationResponse> {
+                print("✅ Device registered successfully: \(success.data)")
+            } else if let error = result as? ApiResultError {
+                print("❌ Failed to register device: \(error.message)")
+            } else {
+                print("⚠️ Unexpected result type from device registration")
+            }
+        } catch {
+            print("❌ Error registering device: \(error.localizedDescription)")
+        }
     }
 
     // MARK: - Handle Notifications
@@ -92,10 +93,10 @@ class PushNotificationManager: NSObject, ObservableObject {
         if let notificationId = userInfo["notification_id"] as? String {
             print("Notification ID: \(notificationId)")
 
-            // Mark as read when user taps notification
-            Task {
-                await markNotificationAsRead(notificationId: notificationId)
-            }
+//            // Mark as read when user taps notification
+//            Task {
+//                await markNotificationAsRead(notificationId: notificationId)
+//            }
         }
 
         if let type = userInfo["type"] as? String {
@@ -129,80 +130,79 @@ class PushNotificationManager: NSObject, ObservableObject {
         }
     }
 
-    private func markNotificationAsRead(notificationId: String) async {
-        guard let authToken = TokenStorage.shared.getToken(),
-              let notificationIdInt = Int32(notificationId) else {
-            return
-        }
-
-//        let result = await notificationApi.markNotificationAsRead(
-//            token: authToken,
-//            notificationId: notificationIdInt
-//        )
-//
-//        switch result {
-//        case is ApiResultSuccess<Notification>:
-//            print("✅ Notification marked as read")
-//        case let error as ApiResultError:
-//            print("❌ Failed to mark notification as read: \(error.message)")
-//        default:
-//            break
+//    private func markNotificationAsRead(notificationId: String) async {
+//        guard TokenStorage.shared.getToken() != nil,
+//              let notificationIdInt = Int32(notificationId) else {
+//            return
 //        }
-    }
+//
+//        do {
+//            let result = try await APILayer.shared.markNotificationAsRead(notificationId: notificationIdInt)
+//
+//            if result is ApiResultSuccess<Notification> {
+//                print("✅ Notification marked as read")
+//            } else if let error = result as? ApiResultError {
+//                print("❌ Failed to mark notification as read: \(error.message)")
+//            }
+//        } catch {
+//            print("❌ Error marking notification as read: \(error.localizedDescription)")
+//        }
+//    }
 
     // MARK: - Notification Preferences
 
     func updateNotificationPreferences(_ preferences: UpdateNotificationPreferencesRequest) async -> Bool {
-        guard let authToken = TokenStorage.shared.getToken() else {
+        guard TokenStorage.shared.getToken() != nil else {
             print("⚠️ No auth token available")
             return false
         }
 
-//        let result = await notificationApi.updateNotificationPreferences(
-//            token: authToken,
-//            request: preferences
-//        )
-//
-//        switch result {
-//        case is ApiResultSuccess<NotificationPreference>:
-//            print("✅ Notification preferences updated")
-//            return true
-//        case let error as ApiResultError:
-//            print("❌ Failed to update preferences: \(error.message)")
-//            return false
-//        default:
-//            return false
-//        }
-        return false
+        do {
+            let result = try await APILayer.shared.updateNotificationPreferences(request: preferences)
+
+            if result is ApiResultSuccess<NotificationPreference> {
+                print("✅ Notification preferences updated")
+                return true
+            } else if let error = result as? ApiResultError {
+                print("❌ Failed to update preferences: \(error.message)")
+                return false
+            }
+            return false
+        } catch {
+            print("❌ Error updating notification preferences: \(error.localizedDescription)")
+            return false
+        }
     }
 
     func getNotificationPreferences() async -> NotificationPreference? {
-        guard let authToken = TokenStorage.shared.getToken() else {
+        guard TokenStorage.shared.getToken() != nil else {
             print("⚠️ No auth token available")
             return nil
         }
 
-//        let result = await notificationApi.getNotificationPreferences(token: authToken)
-//
-//        switch result {
-//        case let success as ApiResultSuccess<NotificationPreference>:
-//            return success.data
-//        case let error as ApiResultError:
-//            print("❌ Failed to get preferences: \(error.message)")
-//            return nil
-//        default:
-//            return nil
-//        }
-        return nil
+        do {
+            let result = try await APILayer.shared.getNotificationPreferences()
+
+            if let success = result as? ApiResultSuccess<NotificationPreference> {
+                return success.data
+            } else if let error = result as? ApiResultError {
+                print("❌ Failed to get preferences: \(error.message)")
+                return nil
+            }
+            return nil
+        } catch {
+            print("❌ Error getting notification preferences: \(error.localizedDescription)")
+            return nil
+        }
     }
 
     // MARK: - Badge Management
 
-//    func clearBadge() {
-//        UIApplication.shared.applicationIconBadgeNumber = 0
-//    }
-//
-//    func setBadge(count: Int) {
-//        UIApplication.shared.applicationIconBadgeNumber = count
-//    }
+    func clearBadge() {
+        UIApplication.shared.applicationIconBadgeNumber = 0
+    }
+
+    func setBadge(count: Int) {
+        UIApplication.shared.applicationIconBadgeNumber = count
+    }
 }