Fix logout, share code display, loading states, and multi-user support

iOS Logout Fix:
- Use @EnvironmentObject in MainTabView and ProfileTabView
- Pass loginViewModel from LoginView to MainTabView
- Handle logout by dismissing main tab when isAuthenticated becomes false
- Logout button now properly returns user to login screen

Share Code UX:
- Clear share code on ManageUsers screen open (iOS & Android)
- Remove auto-loading of share codes
- User must explicitly generate code each time
- Improves security with fresh codes

Loading State Improvements:
- iOS ResidenceDetailView shows loading immediately on navigation
- Android ResidenceDetailScreen enhanced with "Loading residence..." text
- Better user feedback during API calls

Multi-User Support:
- Add isPrimaryOwner and userCount to ResidenceWithTasks model
- Update iOS toResidences() extension to include new fields
- Sync with backend API changes for shared user access

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

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

iosApp/iosApp/Residence/ResidenceDetailView.swift

@@ -11,16 +11,23 @@ struct ResidenceDetailView: View {
     @State private var showAddTask = false
     @State private var showEditResidence = false
     @State private var showEditTask = false
+    @State private var showManageUsers = false
     @State private var selectedTaskForEdit: TaskDetail?
     @State private var selectedTaskForComplete: TaskDetail?
+    @State private var hasAppeared = false
 
     var body: some View {
         ZStack {
             Color(.systemGroupedBackground)
                 .ignoresSafeArea()
 
-            if viewModel.isLoading {
-                ProgressView()
+            if !hasAppeared || viewModel.isLoading {
+                VStack(spacing: 16) {
+                    ProgressView()
+                    Text("Loading residence...")
+                        .font(.subheadline)
+                        .foregroundColor(.secondary)
+                }
             } else if let error = viewModel.errorMessage {
                 ErrorView(message: error) {
                     loadResidenceData()
@@ -85,7 +92,6 @@ struct ResidenceDetailView: View {
                 }
             }
         }
-        .navigationTitle("Property Details")
         .navigationBarTitleDisplayMode(.inline)
         .toolbar {
             ToolbarItem(placement: .navigationBarLeading) {
@@ -98,7 +104,16 @@ struct ResidenceDetailView: View {
                 }
             }
 
-            ToolbarItem(placement: .navigationBarTrailing) {
+            ToolbarItemGroup(placement: .navigationBarTrailing) {
+                // Manage Users button - only show for primary owners
+                if let residence = viewModel.selectedResidence, residence.isPrimaryOwner {
+                    Button(action: {
+                        showManageUsers = true
+                    }) {
+                        Image(systemName: "person.2")
+                    }
+                }
+
                 Button(action: {
                     showAddTask = true
                 }) {
@@ -125,6 +140,15 @@ struct ResidenceDetailView: View {
                 loadResidenceTasks()
             }
         }
+        .sheet(isPresented: $showManageUsers) {
+            if let residence = viewModel.selectedResidence {
+                ManageUsersView(
+                    residenceId: residence.id,
+                    residenceName: residence.name,
+                    isPrimaryOwner: residence.isPrimaryOwner
+                )
+            }
+        }
         .onChange(of: showAddTask) { isShowing in
             if !isShowing {
                 loadResidenceTasks()
@@ -143,6 +167,11 @@ struct ResidenceDetailView: View {
         .onAppear {
             loadResidenceData()
         }
+        .onChange(of: viewModel.selectedResidence) { _, residence in
+            if residence != nil {
+                hasAppeared = true
+            }
+        }
     }
 
     private func loadResidenceData() {