feat(admin): 增加玩家密码管理与角色边界

app/Models/AdminUser.php

@@ -251,6 +251,11 @@ final class AdminUser extends Authenticatable
     {
         $slugs = array_values(array_unique($slugs));
         \App\Support\SuperAdminAccount::assertNotSiteRoleAssignment($slugs);
+        if (in_array(\App\Support\PlatformSystemRoles::SLUG_AGENT, $slugs, true)) {
+            throw ValidationException::withMessages([
+                'role_slugs' => [trans('admin.agent_role_not_assignable_to_platform_account')],
+            ]);
+        }
 
         $roleIds = DB::table('admin_roles')
             ->where('scope_type', AdminRole::SCOPE_SYSTEM)