Add error dialogs with retry/cancel for network failures

Implemented user-friendly error handling for network call failures:

Android (Compose):
- Created reusable ErrorDialog component with retry and cancel buttons
- Updated TasksScreen to show error dialog popup instead of inline error
- Error dialog appears when network calls fail with option to retry

iOS (SwiftUI):
- Created ErrorAlertModifier and ErrorAlertInfo helpers
- Added .errorAlert() view modifier for consistent error handling
- Updated TaskFormView to show error alerts with retry/cancel options
- Error alerts appear when task creation or other network calls fail

Both platforms now provide a consistent user experience when network
errors occur, giving users the choice to retry the operation or cancel.

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

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

iosApp/iosApp/Helpers/ErrorAlertModifier.swift

@@ -0,0 +1,58 @@
+import SwiftUI
+
+/// A view modifier that shows error alerts with retry/cancel options
+struct ErrorAlertModifier: ViewModifier {
+    let error: ErrorAlertInfo?
+    let onRetry: () -> Void
+    let onDismiss: () -> Void
+
+    func body(content: Content) -> some View {
+        content
+            .alert(
+                error?.title ?? "Network Error",
+                isPresented: Binding(
+                    get: { error != nil },
+                    set: { if !$0 { onDismiss() } }
+                )
+            ) {
+                Button("Try Again", role: .none) {
+                    onRetry()
+                }
+                Button("Cancel", role: .cancel) {
+                    onDismiss()
+                }
+            } message: {
+                if let error = error {
+                    Text(error.message)
+                }
+            }
+    }
+}
+
+/// Information about an error to display in an alert
+struct ErrorAlertInfo: Identifiable {
+    let id = UUID()
+    let title: String
+    let message: String
+
+    init(title: String = "Network Error", message: String) {
+        self.title = title
+        self.message = message
+    }
+}
+
+extension View {
+    /// Shows an error alert with retry and cancel buttons
+    ///
+    /// - Parameters:
+    ///   - error: The error to display, or nil to hide the alert
+    ///   - onRetry: Closure called when user taps "Try Again"
+    ///   - onDismiss: Closure called when user taps "Cancel" or dismisses alert
+    func errorAlert(
+        error: ErrorAlertInfo?,
+        onRetry: @escaping () -> Void,
+        onDismiss: @escaping () -> Void
+    ) -> some View {
+        modifier(ErrorAlertModifier(error: error, onRetry: onRetry, onDismiss: onDismiss))
+    }
+}

iosApp/iosApp/Subviews/Task/TaskCard.swift

@@ -260,10 +260,10 @@ struct TaskCard: View {
                 residence: 1,
                 title: "Clean Gutters",
                 description: "Remove all debris from gutters",
-                category: TaskCategory(id: 1, name: "maintenance", description: ""),
-                priority: TaskPriority(id: 2, name: "medium", displayName: "", description: ""),
+                category: TaskCategory(id: 1, name: "maintenance", orderId: 0, description: ""),
+                priority: TaskPriority(id: 2, name: "medium", displayName: "", orderId: 0, description: ""),
                 frequency: TaskFrequency(id: 1, name: "monthly", lookupName: "", displayName: "30", daySpan: 0, notifyDays: 0),
-                status: TaskStatus(id: 1, name: "pending", displayName: "", description: ""),
+                status: TaskStatus(id: 1, name: "pending", displayName: "", orderId: 0, description: ""),
                 dueDate: "2024-12-15",
                 estimatedCost: "150.00",
                 actualCost: nil,

iosApp/iosApp/Subviews/Task/TasksSection.swift

@@ -83,10 +83,10 @@ struct TasksSection: View {
                             residence: 1,
                             title: "Clean Gutters",
                             description: "Remove all debris",
-                            category: TaskCategory(id: 1, name: "maintenance", description: ""),
-                            priority: TaskPriority(id: 2, name: "medium", displayName: "Medium", description: ""),
+                            category: TaskCategory(id: 1, name: "maintenance", orderId: 1, description: ""),
+                            priority: TaskPriority(id: 2, name: "medium", displayName: "Medium", orderId: 1, description: ""),
                             frequency: TaskFrequency(id: 1, name: "monthly", lookupName: "", displayName: "Monthly", daySpan: 0, notifyDays: 0),
-                            status: TaskStatus(id: 1, name: "pending", displayName: "Pending", description: ""),
+                            status: TaskStatus(id: 1, name: "pending", displayName: "Pending", orderId: 1, description: ""),
                             dueDate: "2024-12-15",
                             estimatedCost: "150.00",
                             actualCost: nil,
@@ -113,10 +113,10 @@ struct TasksSection: View {
                             residence: 1,
                             title: "Fix Leaky Faucet",
                             description: "Kitchen sink fixed",
-                            category: TaskCategory(id: 2, name: "plumbing", description: ""),
-                            priority: TaskPriority(id: 3, name: "high", displayName: "High", description: ""),
+                            category: TaskCategory(id: 2, name: "plumbing", orderId: 1, description: ""),
+                            priority: TaskPriority(id: 3, name: "high", displayName: "High", orderId: 1, description: ""),
                             frequency: TaskFrequency(id: 6, name: "once", lookupName: "", displayName: "One Time", daySpan: 0, notifyDays: 0),
-                            status: TaskStatus(id: 3, name: "completed", displayName: "Completed", description: ""),
+                            status: TaskStatus(id: 3, name: "completed", displayName: "Completed", orderId: 1, description: ""),
                             dueDate: "2024-11-01",
                             estimatedCost: "200.00",
                             actualCost: nil,

iosApp/iosApp/Task/TaskFormView.swift

@@ -41,6 +41,9 @@ struct TaskFormView: View {
     @State private var titleError: String = ""
     @State private var residenceError: String = ""
 
+    // Error alert state
+    @State private var errorAlert: ErrorAlertInfo? = nil
+
     var body: some View {
         NavigationStack {
             ZStack {
@@ -173,6 +176,21 @@ struct TaskFormView: View {
                     isPresented = false
                 }
             }
+            .onChange(of: viewModel.errorMessage) { errorMessage in
+                if let errorMessage = errorMessage, !errorMessage.isEmpty {
+                    errorAlert = ErrorAlertInfo(message: errorMessage)
+                }
+            }
+            .errorAlert(
+                error: errorAlert,
+                onRetry: {
+                    errorAlert = nil
+                    submitForm()
+                },
+                onDismiss: {
+                    errorAlert = nil
+                }
+            )
         }
     }