feat: 初始化项目配置和基础架构

- 添加项目配置文件：.vercelignore、.codex/config.toml、postcss.config.js、.prettierrc 等
- 设置构建工具链：Vite + React + TypeScript + TailwindCSS
- 添加核心组件：HeaderBar、TierRow、ItemCard、Pool
- 配置 CI/CD 和部署相关文件：vercel.json、DEPLOY.md
- 添加开发工具配置：ESLint、Prettier、EditorConfig
- 实现基础功能：拖拽排序、图片处理、状态管理

.eslintrc.cjs

@@ -0,0 +1,29 @@
+/** @type {import('eslint').Linter.Config} */
+module.exports = {
+  root: true,
+  env: {
+    browser: true,
+    es2021: true
+  },
+  parser: "@typescript-eslint/parser",
+  parserOptions: {
+    ecmaVersion: "latest",
+    sourceType: "module"
+  },
+  plugins: ["@typescript-eslint", "react-refresh", "react-hooks"],
+  extends: [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:react-hooks/recommended",
+    "prettier"
+  ],
+  rules: {
+    "react-refresh/only-export-components": [
+      "warn",
+      { allowConstantExport: true }
+    ],
+    "@typescript-eslint/explicit-function-return-type": "off",
+    "@typescript-eslint/no-explicit-any": "warn",
+    "@typescript-eslint/no-unused-vars": ["warn", { argsIgnorePattern: "^_" }]
+  }
+};