feat: implement core ERP modules, multi-tenant architecture, and comprehensive system workflow documentation.

Modules/ContractorManagement/app/Http/Controllers/ContractorController.php

@@ -93,7 +93,14 @@ class ContractorController extends Controller
                     'must_change_password' => true,
                 ]);
 
-                $role = Role::firstOrCreate(['name' => 'Contractor']);
+                // Provision the account with the role that owns user-management
+                // actions. Keep the legacy Contractor role only for existing
+                // accounts; new contractor admins must use the admin role.
+                $roleName = $contractor->parent_id
+                    ? 'Sub Contractor Admin'
+                    : 'Main Contractor Admin';
+                $role = Role::firstOrCreate(['name' => $roleName]);
+                $role->givePermissionTo('users.access');
                 $user->assignRole($role);
             }
         });