Add contractor sharing feature and move settings to navigation bar

Contractor Sharing:
- Add .casera file format for sharing contractors between users
- Create SharedContractor model with JSON serialization
- Implement ContractorSharingManager for iOS (Swift) and Android (Kotlin)
- Register .casera file type in iOS Info.plist and Android manifest
- Add share button to ContractorDetailView (iOS) and ContractorDetailScreen (Android)
- Add import confirmation, success, and error dialogs
- Create expect/actual platform implementations for sharing and import handling

Navigation Changes:
- Remove Profile tab from bottom tab bar (iOS and Android)
- Add settings gear icon to left side of "My Properties" title
- Settings gear opens Profile/Settings screen as sheet (iOS) or navigates (Android)
- Add property button to top right action bar

Bug Fixes:
- Fix ResidenceUsersResponse to match API's flat array response format
- Fix GenerateShareCodeResponse handling to access nested shareCode property
- Update ManageUsersDialog to accept residenceOwnerId parameter

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

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

iosApp/iosApp/Residence/ManageUsersView.swift

@@ -5,10 +5,11 @@ struct ManageUsersView: View {
     let residenceId: Int32
     let residenceName: String
     let isPrimaryOwner: Bool
+    let residenceOwnerId: Int32
     @Environment(\.dismiss) private var dismiss
 
     @State private var users: [ResidenceUserResponse] = []
-    @State private var ownerId: Int32?
+    private var ownerId: Int32 { residenceOwnerId }
     @State private var shareCode: ShareCodeResponse?
     @State private var isLoading = true
     @State private var errorMessage: String?
@@ -97,10 +98,9 @@ struct ManageUsersView: View {
                 let result = try await APILayer.shared.getResidenceUsers(residenceId: Int32(Int(residenceId)))
 
                 await MainActor.run {
-                    if let successResult = result as? ApiResultSuccess<ResidenceUsersResponse>,
-                       let responseData = successResult.data as? ResidenceUsersResponse {
-                        self.users = Array(responseData.users)
-                        self.ownerId = Int32(responseData.owner.id)
+                    if let successResult = result as? ApiResultSuccess<NSArray>,
+                       let responseData = successResult.data as? [ResidenceUserResponse] {
+                        self.users = responseData
                         self.isLoading = false
                     } else if let errorResult = result as? ApiResultError {
                         self.errorMessage = ErrorMessageParser.parse(errorResult.message)
@@ -148,8 +148,9 @@ struct ManageUsersView: View {
                 let result = try await APILayer.shared.generateShareCode(residenceId: Int32(Int(residenceId)))
 
                 await MainActor.run {
-                    if let successResult = result as? ApiResultSuccess<ShareCodeResponse> {
-                        self.shareCode = successResult.data
+                    if let successResult = result as? ApiResultSuccess<GenerateShareCodeResponse>,
+                       let response = successResult.data {
+                        self.shareCode = response.shareCode
                         self.isGeneratingCode = false
                     } else if let errorResult = result as? ApiResultError {
                         self.errorMessage = ErrorMessageParser.parse(errorResult.message)
@@ -195,5 +196,5 @@ struct ManageUsersView: View {
 }
 
 #Preview {
-    ManageUsersView(residenceId: 1, residenceName: "My Home", isPrimaryOwner: true)
+    ManageUsersView(residenceId: 1, residenceName: "My Home", isPrimaryOwner: true, residenceOwnerId: 1)
 }

iosApp/iosApp/Residence/ResidenceDetailView.swift

@@ -120,7 +120,8 @@ struct ResidenceDetailView: View {
                 ManageUsersView(
                     residenceId: residence.id,
                     residenceName: residence.name,
-                    isPrimaryOwner: isCurrentUserOwner(of: residence)
+                    isPrimaryOwner: isCurrentUserOwner(of: residence),
+                    residenceOwnerId: residence.ownerId
                 )
             }
         }

iosApp/iosApp/Residence/ResidencesListView.swift

@@ -6,6 +6,7 @@ struct ResidencesListView: View {
     @State private var showingAddResidence = false
     @State private var showingJoinResidence = false
     @State private var showingUpgradePrompt = false
+    @State private var showingSettings = false
     @StateObject private var authManager = AuthenticationManager.shared
     @StateObject private var subscriptionCache = SubscriptionCacheWrapper.shared
 
@@ -46,6 +47,17 @@ struct ResidencesListView: View {
         .navigationTitle(L10n.Residences.title)
         .navigationBarTitleDisplayMode(.inline)
         .toolbar {
+            ToolbarItem(placement: .navigationBarLeading) {
+                Button(action: {
+                    showingSettings = true
+                }) {
+                    Image(systemName: "gearshape.fill")
+                        .font(.system(size: 18, weight: .semibold))
+                        .foregroundColor(Color.appPrimary)
+                }
+                .accessibilityIdentifier(AccessibilityIdentifiers.Navigation.settingsButton)
+            }
+
             ToolbarItemGroup(placement: .navigationBarTrailing) {
                 Button(action: {
                     // Check if we should show upgrade prompt before joining
@@ -93,6 +105,11 @@ struct ResidencesListView: View {
         .sheet(isPresented: $showingUpgradePrompt) {
             UpgradePromptView(triggerKey: "add_second_property", isPresented: $showingUpgradePrompt)
         }
+        .sheet(isPresented: $showingSettings) {
+            NavigationView {
+                ProfileTabView()
+            }
+        }
         .onAppear {
             if authManager.isAuthenticated {
                 viewModel.loadMyResidences()