iOS VoiceOver accessibility overhaul — 67 files

New framework:
- AccessibilityLabels.swift: centralized A11y struct with VoiceOver strings
- AccessibilityModifiers.swift: reusable .a11yHeader, .a11yDecorative,
  .a11yButton, .a11yCard, .a11yStatValue View extensions

Shared components: decorative elements hidden, stat views combined,
status/priority badges labeled, error views announced, empty states grouped

Cards: ResidenceCard, TaskCard, DynamicTaskCard, ContractorCard,
DocumentCard, WarrantyCard — all grouped with combined labels,
chevrons hidden, action buttons labeled

Main screens: Login, Register, Residences, Tasks, Contractors, Documents —
toolbar buttons labeled, section headers marked, form field hints added

Onboarding: all 10 views — header traits, button hints, task selection
state, progress indicator, decorative backgrounds hidden

Profile/Subscription: toggle hints, theme selection state, feature
comparison table accessibility, subscription button labels

iOS build verified: BUILD SUCCEEDED

iosApp/iosApp/Residence/ResidenceDetailView.swift

@@ -295,6 +295,7 @@ private extension ResidenceDetailView {
                 Text(L10n.Residences.contractors)
                     .font(.system(size: 20, weight: .bold, design: .rounded))
                     .foregroundColor(Color.appTextPrimary)
+                    .accessibilityAddTraits(.isHeader)
 
                 Spacer()
             }
@@ -351,10 +352,11 @@ private extension ResidenceDetailView {
                     showEditResidence = true
                 }
                 .accessibilityIdentifier(AccessibilityIdentifiers.Residence.editButton)
+                .accessibilityLabel("Edit property")
             }
         }
     }
-    
+
     @ToolbarContentBuilder
     var trailingToolbar: some ToolbarContent {
         ToolbarItemGroup(placement: .navigationBarTrailing) {
@@ -369,6 +371,7 @@ private extension ResidenceDetailView {
                     }
                 }
                 .disabled(viewModel.isGeneratingReport)
+                .accessibilityLabel("Generate maintenance report")
             }
 
             // Manage Users button (owner only) - includes share code generation and easy share
@@ -383,6 +386,7 @@ private extension ResidenceDetailView {
                 } label: {
                     Image(systemName: "person.2")
                 }
+                .accessibilityLabel("Manage users")
             }
 
             Button {
@@ -398,6 +402,7 @@ private extension ResidenceDetailView {
                 Image(systemName: "plus")
             }
             .accessibilityIdentifier(AccessibilityIdentifiers.Task.addButton)
+            .accessibilityLabel("Add task")
 
             if let residence = viewModel.selectedResidence, isCurrentUserOwner(of: residence) {
                 Button {
@@ -407,6 +412,7 @@ private extension ResidenceDetailView {
                         .foregroundStyle(Color.appError)
                 }
                 .accessibilityIdentifier(AccessibilityIdentifiers.Residence.deleteButton)
+                .accessibilityLabel("Delete property")
             }
         }
     }

iosApp/iosApp/Residence/ResidencesListView.swift

@@ -55,6 +55,7 @@ struct ResidencesListView: View {
                     OrganicToolbarButton(systemName: "gearshape.fill")
                 }
                 .accessibilityIdentifier(AccessibilityIdentifiers.Navigation.settingsButton)
+                .accessibilityLabel("Settings")
             }
 
             ToolbarItemGroup(placement: .navigationBarTrailing) {
@@ -69,6 +70,7 @@ struct ResidencesListView: View {
                 }) {
                     OrganicToolbarButton(systemName: "person.badge.plus")
                 }
+                .accessibilityLabel("Join a property")
 
                 Button(action: {
                     // Check if we should show upgrade prompt before adding
@@ -82,6 +84,7 @@ struct ResidencesListView: View {
                     OrganicToolbarButton(systemName: "plus", isPrimary: true)
                 }
                 .accessibilityIdentifier(AccessibilityIdentifiers.Residence.addButton)
+                .accessibilityLabel("Add new property")
             }
         }
         .sheet(isPresented: $showingAddResidence) {