Add PDF maintenance report generation feature for Android and iOS

- Add generateTasksReport API endpoint in ResidenceApi
- Implement report generation button in Android residence detail screen
- Add report generation state management in shared ResidenceViewModel
- Add report generation button to iOS residence detail view toolbar
- Implement iOS-specific report generation logic in ResidenceViewModel
- Display loading spinner and success/error alerts for report generation

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

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

iosApp/iosApp/Residence/ResidenceDetailView.swift

@@ -15,6 +15,7 @@ struct ResidenceDetailView: View {
     @State private var selectedTaskForEdit: TaskDetail?
     @State private var selectedTaskForComplete: TaskDetail?
     @State private var hasAppeared = false
+    @State private var showReportAlert = false
 
     var body: some View {
         ZStack {
@@ -105,6 +106,20 @@ struct ResidenceDetailView: View {
             }
 
             ToolbarItemGroup(placement: .navigationBarTrailing) {
+                // Generate Report button
+                if viewModel.selectedResidence != nil {
+                    Button(action: {
+                        viewModel.generateTasksReport(residenceId: residenceId)
+                    }) {
+                        if viewModel.isGeneratingReport {
+                            ProgressView()
+                        } else {
+                            Image(systemName: "doc.text")
+                        }
+                    }
+                    .disabled(viewModel.isGeneratingReport)
+                }
+
                 // Manage Users button - only show for primary owners
                 if let residence = viewModel.selectedResidence, residence.isPrimaryOwner {
                     Button(action: {
@@ -164,6 +179,16 @@ struct ResidenceDetailView: View {
                 loadResidenceTasks()
             }
         }
+        .onChange(of: viewModel.reportMessage) { message in
+            if message != nil {
+                showReportAlert = true
+            }
+        }
+        .alert("Maintenance Report", isPresented: $showReportAlert) {
+            Button("OK", role: .cancel) { }
+        } message: {
+            Text(viewModel.reportMessage ?? "")
+        }
         .onAppear {
             loadResidenceData()
         }