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/package.json

@@ -9,6 +9,19 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@codemirror/autocomplete": "^6.20.2",
+    "@codemirror/commands": "^6.10.3",
+    "@codemirror/lang-javascript": "^6.2.5",
+    "@codemirror/lang-php": "^6.0.2",
+    "@codemirror/lang-python": "^6.2.1",
+    "@codemirror/language": "^6.12.3",
+    "@codemirror/legacy-modes": "^6.5.3",
+    "@codemirror/lint": "^6.9.6",
+    "@codemirror/search": "^6.7.0",
+    "@codemirror/state": "^6.6.0",
+    "@codemirror/theme-one-dark": "^6.1.3",
+    "@codemirror/view": "^6.43.0",
+    "codemirror": "^6.0.2",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "react-router-dom": "^6.26.0"