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/.env.example

@@ -0,0 +1,14 @@
+# API base URL (relative path to backend)
+VITE_API_BASE_URL=/api
+
+# Allowed hosts for API connection (comma-separated)
+# Example: VITE_ALLOWED_HOSTS=localhost,127.0.0.1,example.com
+VITE_ALLOWED_HOSTS=localhost,127.0.0.1,0.0.0.0
+
+# Vite server configuration
+VITE_PORT=13001
+VITE_HOST=0.0.0.0
+VITE_BACKEND_URL=http://localhost:3001
+
+# Interface language (zh, en, ja)
+VITE_DEFAULT_LANGUAGE=en