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

tailwind.config.cjs

@@ -0,0 +1,21 @@
+/** @type {import('tailwindcss').Config} */
+module.exports = {
+  content: ["./index.html", "./src/**/*.{ts,tsx}"],
+  darkMode: "class",
+  theme: {
+    extend: {
+      colors: {
+        surface: "#121212",
+        panel: "#1c1c1f",
+        accent: "#70e0a3",
+        border: "#2b2b30",
+        text: "#e8e8f0",
+        mute: "#9aa0b5"
+      },
+      boxShadow: {
+        soft: "0 10px 30px rgba(0,0,0,0.35)"
+      }
+    }
+  },
+  plugins: []
+};