feat: 完成前端项目初始化 (TASK-003)

- 创建 Next.js 14+ 前端项目，TypeScript + Tailwind CSS
- 安装核心依赖：axios, react-hook-form, zod, zustand, recharts
- 安装 Shadcn/ui 组件库
- 配置环境变量和基础目录结构
- 验证构建成功

任务状态：TASK-003 已完成
下一步：TASK-004 配置数据库

Assisted-by: Kiro AI <kiro@cursor.com>

frontend/eslint.config.mjs

@@ -0,0 +1,18 @@
+import { defineConfig, globalIgnores } from "eslint/config";
+import nextVitals from "eslint-config-next/core-web-vitals";
+import nextTs from "eslint-config-next/typescript";
+
+const eslintConfig = defineConfig([
+  ...nextVitals,
+  ...nextTs,
+  // Override default ignores of eslint-config-next.
+  globalIgnores([
+    // Default ignores of eslint-config-next:
+    ".next/**",
+    "out/**",
+    "build/**",
+    "next-env.d.ts",
+  ]),
+]);
+
+export default eslintConfig;