feat: implement QuestionBank CRUD with pagination and template query

- Add pagination support to findAll (page, limit query params)
- Add findByTemplateId method to service
- Add GET /by-template/:templateId endpoint to controller
- Service already includes CRUD for QuestionBank and QuestionBankItem

web/services/userSettingService.ts

@@ -0,0 +1,43 @@
+// web/services/userSettingService.ts
+import { apiClient } from './apiClient';
+import { AppSettings } from '../types'; // Frontend AppSettings interface
+
+// Assuming backend returns language, plus id, userId, createdAt, updatedAt
+interface UserPersonalSettingResponse {
+  id: string;
+  userId: string;
+  language: string;
+  createdAt: Date;
+  updatedAt: Date;
+}
+
+interface UserSettingResponse extends AppSettings {
+  id: string;
+  userId: string;
+  createdAt: Date;
+  updatedAt: Date;
+}
+
+export const userSettingService = {
+  async get(_token: string): Promise<UserSettingResponse> {
+    const { data } = await apiClient.get<UserSettingResponse>('/v1/admin/settings');
+    return data;
+  },
+
+  async update(_token: string, settings: Partial<AppSettings>): Promise<UserSettingResponse> {
+    const { data } = await apiClient.put<UserSettingResponse>('/v1/admin/settings', settings);
+    return data;
+  },
+
+  async getPersonal(_token: string): Promise<UserPersonalSettingResponse> {
+    const { data } = await apiClient.get<UserPersonalSettingResponse>('/users/settings');
+    return data;
+  },
+
+  async updateLanguage(_token: string, language: string): Promise<UserPersonalSettingResponse> {
+    const { data } = await apiClient.put<UserPersonalSettingResponse>('/users/settings/language', { language });
+    return data;
+  },
+
+  // Unused legacy methods removed
+};