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/detail/widgets/tender_detail_action.dart

@@ -35,7 +35,7 @@ class TenderDetailActions extends StatefulWidget {
 class _TenderDetailActionsState extends State<TenderDetailActions> {
   @override
   Widget build(BuildContext context) {
-    final userRole = context.read<AuthViewModel>().userRole;
+    final userRole = context.watch<AuthViewModel>().userRole;
     return widget.isScreenBig
         ? _webActions(userRole!)
         : Column(