Enhance authentication flow and user role management

- Updated AuthViewModel to hydrate user data from storage on initialization.
- Added method to AuthRepository for retrieving stored customer data.
- Enhanced AuthService to save and retrieve customer data from SharedPreferences.
- Refactored UI components to use context.watch for user role updates in MeetingTimeDialog, TenderDetailActions, and TendersPage.
- Improved navigation logic in final completion pages to handle user interactions more effectively.

lib/views/tenders/pages/d_tenders_page.dart

@@ -50,7 +50,7 @@ class _DesktopTendersPageState extends State<DesktopTendersPage> {
 
   @override
   Widget build(BuildContext context) {
-    final userRole = context.read<AuthViewModel>().userRole;
+    final userRole = context.watch<AuthViewModel>().userRole;
     return Scaffold(
       backgroundColor: AppColors.backgroundColor,
       body: SafeArea(