feat: 脚本创作+发布+市场体系

- 数据模型新增: title(必填), description(可选), status(draft/published)
- 新增 API: POST /scripts/:id/publish, GET /api/market (搜索+分页+runtime过滤)
- 前端首页重构: 选语言 → CodeMirror 编辑器(8种语言语法高亮) → 标题/描述 → 草稿/发布
- 新增 /market 页面: 浏览已发布脚本, 搜索+过滤+分页
- 详情页新增: 发布按钮(草稿→市场), title/description 展示
- Shell 类运行时显示 source 命令(继承环境变量)
- backend GetSourceCommand 支持 bash/zsh/sh/fish 四种 shell 格式

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/App.tsx

@@ -2,6 +2,7 @@ import { Routes, Route, Link } from 'react-router-dom'
 import Home from './pages/Home'
 import ScriptDetail from './pages/ScriptDetail'
 import DeleteScript from './pages/DeleteScript'
+import Market from './pages/Market'
 
 export default function App() {
   return (
@@ -11,13 +12,17 @@ export default function App() {
           <Link to="/" className="text-xl font-bold tracking-tight hover:text-blue-400 transition-colors">
             <span className="text-blue-500">⚡</span> ScriptForge
           </Link>
-          <span className="text-sm text-gray-500">脚本快速转运行链接</span>
+          <nav className="flex gap-4 text-sm">
+            <Link to="/" className="text-gray-400 hover:text-blue-400 transition-colors">创建</Link>
+            <Link to="/market" className="text-gray-400 hover:text-blue-400 transition-colors">市场</Link>
+          </nav>
         </div>
       </header>
 
       <main className="flex-1 max-w-4xl mx-auto px-4 py-8 w-full">
         <Routes>
           <Route path="/" element={<Home />} />
+          <Route path="/market" element={<Market />} />
           <Route path="/s/:id" element={<ScriptDetail />} />
           <Route path="/s/:id/delete" element={<DeleteScript />} />
         </Routes>
@@ -28,4 +33,4 @@ export default function App() {
       </footer>
     </div>
   )
-}
+}