Enhance Customer model to include role attribute and update related components

- Added a new `role` attribute to the `Customer` model in `customer.dart` and updated the corresponding generated files.
- Modified the `AuthViewModel` to set the user role based on the logged-in user's role.
- Updated UI components in `TenderDetailActions` and `DesktopTendersPage` to conditionally render elements based on the user's role.
- Refactored tests to validate the new role attribute in the `Customer` model.

lib/views/shared/select_submission_dialog.dart

@@ -1,7 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import 'package:tm_app/core/utils/size_config.dart';
-import 'package:tm_app/views/shared/base_button.dart';
 
 import '../../core/constants/common_strings.dart';
 import '../../core/constants/tender_submision_mode.dart';
@@ -91,18 +90,35 @@ class _SelectSubmissionDialogState extends State<SelectSubmissionDialog> {
                   //     ),
                   //   ),
                   // ),
-                  BaseButton(
-                    isEnabled: true,
-                    onPressed: () {
+                  InkWell(
+                    highlightColor: Colors.transparent,
+                    splashColor: Colors.transparent,
+                    onTap: () {
                       context.pop();
                     },
-                    width: 150,
-                    height: 56.0,
-                    text: CommonStrings.cancel,
-                    backgroundColor: Colors.transparent,
-                    textColor: AppColors.errorColor,
-                    borderColor: AppColors.errorColor,
+                    child: Container(
+                      width: 150,
+                      height: 56.0,
+                      decoration: BoxDecoration(
+                        color: Colors.transparent,
+                        borderRadius: BorderRadius.circular(100),
+                        border: Border.all(
+                          color: AppColors.errorColor,
+                          width: 2.0,
+                        ),
+                      ),
+                      alignment: Alignment.center,
+                      child: Text(
+                        CommonStrings.cancel,
+                        style: TextStyle(
+                          fontSize: 14.0.sp(),
+                          fontWeight: FontWeight.w500,
+                          color: AppColors.errorColor,
+                        ),
+                      ),
+                    ),
                   ),
+
                   SizedBox(width: 10.0.w()),
 
                   InkWell(