后端功能增强：全局异常处理、API控制器、JSP视图和单元测试

- 添加 GlobalExceptionHandler 全局异常处理
- 添加 ApiController REST API 控制器
- 更新 WebConfig 跨域配置和 ProductRepository 查询方法
- 新增 monitor/product-detail/profile JSP 视图页面
- 添加 FlashSaleServiceTest 秒杀服务单元测试
- 更新 application.yml 配置

flash-sale-frontend/package.json

@@ -0,0 +1,48 @@
+{
+  "name": "flash-sale-frontend",
+  "private": true,
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vue-tsc && vite build",
+    "preview": "vite preview",
+    "lint": "eslint . --ext .vue,.js,.jsx,.cjs,.mjs,.ts,.tsx,.cts,.mts --fix --ignore-path .gitignore",
+    "format": "prettier --write src/"
+  },
+  "dependencies": {
+    "vue": "^3.4.15",
+    "vue-router": "^4.2.5",
+    "pinia": "^2.1.7",
+    "axios": "^1.6.5",
+    "element-plus": "^2.4.4",
+    "@element-plus/icons-vue": "^2.3.1",
+    "dayjs": "^1.11.10",
+    "@vueuse/core": "^10.7.1",
+    "echarts": "^5.4.3",
+    "vue-echarts": "^6.6.8",
+    "lodash-es": "^4.17.21",
+    "@types/lodash-es": "^4.17.12",
+    "xlsx": "^0.18.5",
+    "file-saver": "^2.0.5",
+    "@types/file-saver": "^2.0.7"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-vue": "^5.0.3",
+    "vite": "^5.0.11",
+    "typescript": "^5.3.3",
+    "vue-tsc": "^1.8.27",
+    "@types/node": "^20.11.5",
+    "sass": "^1.70.0",
+    "tailwindcss": "^3.4.1",
+    "autoprefixer": "^10.4.17",
+    "postcss": "^8.4.33",
+    "eslint": "^8.56.0",
+    "eslint-plugin-vue": "^9.20.1",
+    "@typescript-eslint/eslint-plugin": "^6.19.0",
+    "@typescript-eslint/parser": "^6.19.0",
+    "prettier": "^3.2.4",
+    "@vue/eslint-config-prettier": "^9.0.0",
+    "@vue/eslint-config-typescript": "^12.0.0"
+  }
+}