Add comprehensive i18n localization for KMM and iOS

KMM (Android/Shared):
- Add strings.xml with 200+ localized strings
- Add translation files for es, fr, de, pt languages
- Update all screens to use stringResource() for i18n
- Add Accept-Language header to API client for all platforms

iOS:
- Add L10n.swift helper with type-safe string accessors
- Add Localizable.xcstrings with translations for all 5 languages
- Update all SwiftUI views to use L10n.* for localized strings
- Localize Auth, Residence, Task, Contractor, Document, and Profile views

Supported languages: English, Spanish, French, German, Portuguese

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

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

iosApp/iosApp/Residence/ResidenceDetailView.swift

@@ -54,35 +54,35 @@ struct ResidenceDetailView: View {
             leadingToolbar
             trailingToolbar
         }
-        
+
         // MARK: Alerts
-        .alert("Generate Report", isPresented: $showReportConfirmation) {
-            Button("Cancel", role: .cancel) {
+        .alert(L10n.Residences.generateReport, isPresented: $showReportConfirmation) {
+            Button(L10n.Common.cancel, role: .cancel) {
                 showReportConfirmation = false
             }
-            Button("Generate") {
+            Button(L10n.Residences.generate) {
                 viewModel.generateTasksReport(residenceId: residenceId, email: "")
                 showReportConfirmation = false
             }
         } message: {
-            Text("This will generate a comprehensive report of your property including all tasks, documents, and contractors.")
+            Text(L10n.Residences.generateReportMessage)
         }
-        
-        .alert("Delete Residence", isPresented: $showDeleteConfirmation) {
-            Button("Cancel", role: .cancel) { }
+
+        .alert(L10n.Residences.deleteTitle, isPresented: $showDeleteConfirmation) {
+            Button(L10n.Common.cancel, role: .cancel) { }
                 .accessibilityIdentifier(AccessibilityIdentifiers.Alert.cancelButton)
-            Button("Delete", role: .destructive) {
+            Button(L10n.Common.delete, role: .destructive) {
                 deleteResidence()
             }
             .accessibilityIdentifier(AccessibilityIdentifiers.Alert.deleteButton)
         } message: {
             if let residence = viewModel.selectedResidence {
-                Text("Are you sure you want to delete \(residence.name)? This action cannot be undone and will delete all associated tasks, documents, and data.")
+                Text("\(L10n.Residences.deleteConfirmMessage)")
             }
         }
-        
-        .alert("Maintenance Report", isPresented: $showReportAlert) {
-            Button("OK", role: .cancel) { }
+
+        .alert(L10n.Residences.maintenanceReport, isPresented: $showReportAlert) {
+            Button(L10n.Common.ok, role: .cancel) { }
         } message: {
             Text(viewModel.reportMessage ?? "")
         }
@@ -189,7 +189,7 @@ private extension ResidenceDetailView {
     var loadingView: some View {
         VStack(spacing: 16) {
             ProgressView()
-            Text("Loading residence...")
+            Text(L10n.Residences.loadingResidence)
                 .font(.subheadline)
                 .foregroundColor(Color.appTextSecondary)
         }
@@ -226,9 +226,9 @@ private extension ResidenceDetailView {
                 reloadTasks: { loadResidenceTasks() }
             )
         } else if isLoadingTasks {
-            ProgressView("Loading tasks...")
+            ProgressView(L10n.Residences.loadingTasks)
         } else if let tasksError = tasksError {
-            Text("Error loading tasks: \(tasksError)")
+            Text("\(L10n.Residences.errorLoadingTasks): \(tasksError)")
                 .foregroundColor(Color.appError)
                 .padding()
         }
@@ -242,7 +242,7 @@ private extension ResidenceDetailView {
                 Image(systemName: "person.2.fill")
                     .font(.title2)
                     .foregroundColor(Color.appPrimary)
-                Text("Contractors")
+                Text(L10n.Residences.contractors)
                     .font(.title2.weight(.bold))
                     .foregroundColor(Color.appPrimary)
             }
@@ -256,7 +256,7 @@ private extension ResidenceDetailView {
                 }
                 .padding()
             } else if let error = contractorsError {
-                Text("Error: \(error)")
+                Text("\(L10n.Common.error): \(error)")
                     .foregroundColor(Color.appError)
                     .padding()
             } else if contractors.isEmpty {
@@ -265,10 +265,10 @@ private extension ResidenceDetailView {
                     Image(systemName: "person.crop.circle.badge.plus")
                         .font(.system(size: 48))
                         .foregroundColor(Color.appTextSecondary.opacity(0.6))
-                    Text("No contractors yet")
+                    Text(L10n.Residences.noContractors)
                         .font(.headline)
                         .foregroundColor(Color.appTextPrimary)
-                    Text("Add contractors from the Contractors tab")
+                    Text(L10n.Residences.addContractorsPrompt)
                         .font(.subheadline)
                         .foregroundColor(Color.appTextSecondary)
                 }
@@ -303,7 +303,7 @@ private extension ResidenceDetailView {
     var leadingToolbar: some ToolbarContent {
         ToolbarItem(placement: .navigationBarLeading) {
             if viewModel.selectedResidence != nil {
-                Button("Edit") {
+                Button(L10n.Common.edit) {
                     showEditResidence = true
                 }
                 .accessibilityIdentifier(AccessibilityIdentifiers.Residence.editButton)