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/userService.ts

@@ -0,0 +1,58 @@
+import { apiClient } from './apiClient';
+
+export const userService = {
+  async changePassword(currentPassword: string, newPassword: string): Promise<{ message: string }> {
+    const { data } = await apiClient.put('/users/password', {
+      currentPassword,
+      newPassword,
+    });
+    return data;
+  },
+
+  async getUsers(page?: number, limit?: number): Promise<any> {
+    const params = new URLSearchParams();
+    if (page) params.append('page', page.toString());
+    if (limit) params.append('limit', limit.toString());
+    const { data } = await apiClient.get(`/users?${params.toString()}`);
+    return data;
+  },
+
+  async updateUser(userId: string, isAdmin: boolean): Promise<{ message: string }> {
+    const { data } = await apiClient.put(`/users/${userId}`, {
+      isAdmin,
+    });
+    return data;
+  },
+
+  async updateUserInfo(userId: string, userData: { username?: string; isAdmin?: boolean; password?: string; displayName?: string }): Promise<{ message: string }> {
+    const { data } = await apiClient.put(`/users/${userId}`, userData);
+    return data;
+  },
+
+  async deleteUser(userId: string): Promise<{ message: string }> {
+    const { data } = await apiClient.delete(`/users/${userId}`);
+    return data;
+  },
+
+  async createUser(username: string, password: string, isAdmin: boolean = false, tenantId?: string, displayName?: string): Promise<{ message: string }> {
+    const { data } = await apiClient.post('/users', {
+      username,
+      password,
+      isAdmin,
+      tenantId,
+      displayName,
+    });
+    return data;
+  },
+  
+  async exportUsers(): Promise<Blob> {
+    return await apiClient.getBlob('/v1/admin/users/export');
+  },
+
+  async importUsers(file: File): Promise<any> {
+    const formData = new FormData();
+    formData.append('file', file);
+    const { data } = await apiClient.postMultipart('/v1/admin/users/import', formData);
+    return data;
+  },
+};