Created App Surfaces for Theming

lib/screens/admin/offices_screen.dart

@@ -7,6 +7,7 @@ import '../../providers/profile_provider.dart';
 import '../../providers/tickets_provider.dart';
 import '../../widgets/mono_text.dart';
 import '../../widgets/responsive_body.dart';
+import '../../theme/app_surfaces.dart';
 import '../../widgets/tasq_adaptive_list.dart';
 
 class OfficesScreen extends ConsumerStatefulWidget {
@@ -177,6 +178,7 @@ class _OfficesScreenState extends ConsumerState<OfficesScreen> {
       context: context,
       builder: (dialogContext) {
         return AlertDialog(
+          shape: AppSurfaces.of(context).dialogShape,
           title: Text(office == null ? 'Create Office' : 'Edit Office'),
           content: TextField(
             controller: nameController,

lib/screens/admin/user_management_screen.dart

@@ -8,6 +8,7 @@ import '../../models/user_office.dart';
 import '../../providers/admin_user_provider.dart';
 import '../../providers/profile_provider.dart';
 import '../../providers/tickets_provider.dart';
+import '../../theme/app_surfaces.dart';
 import '../../providers/user_offices_provider.dart';
 import '../../utils/app_time.dart';
 import '../../widgets/mono_text.dart';
@@ -241,8 +242,10 @@ class _UserManagementScreenState extends ConsumerState<UserManagementScreen> {
       },
       onRequestRefresh: () {
         // For server-side pagination, update the query provider
-        ref.read(adminUserQueryProvider.notifier).state =
-            const AdminUserQuery(offset: 0, limit: 50);
+        ref.read(adminUserQueryProvider.notifier).state = const AdminUserQuery(
+          offset: 0,
+          limit: 50,
+        );
       },
       isLoading: false,
     );
@@ -289,6 +292,7 @@ class _UserManagementScreenState extends ConsumerState<UserManagementScreen> {
         return StatefulBuilder(
           builder: (context, setDialogState) {
             return AlertDialog(
+              shape: AppSurfaces.of(context).dialogShape,
               title: const Text('Update user'),
               content: ConstrainedBox(
                 constraints: const BoxConstraints(maxWidth: 520),