feat(admin): support user profile editing, password resetting, and email column with search

- Add UpdateUser API and logics supporting nickname, email, admin flag modification, and password reset.
- Relocate user delete button and confirmation Alert into the EditUserModal.
- Optimize admin Switch change to trigger instant API request with rollback support.
- Fix missing email field in edit form initialization by fetching full profile metadata.
- Render email column in users list and support email-based filtering in UserFilterBar.
- Remove hardcoded styles and sizes from Switch components to follow global theme.

frontend/lib/services/admin/user.service.ts

@@ -4,6 +4,7 @@ import type {
   CreateUserRequest,
   ListUsersRequest,
   ListUsersResponse,
+  UpdateUserRequest,
   UpdateUserStatusRequest,
 } from './types';
 
@@ -29,4 +30,8 @@ export class AdminUserService extends BaseService {
   static async deleteUser(id: string): Promise<void> {
     return this.delete<void>(`/users/${id}`);
   }
-}
+
+  static async updateUser(id: string, request: UpdateUserRequest): Promise<void> {
+    return this.put<void>(`/users/${id}`, request);
+  }
+}