补齐共享 UI 组件库与展示页交互

- 新增 shadcn canonical UI 源码、共享样式与组件导出
- 新增 /components 共享组件展示页及路由测试
- 补齐平台组件筛选、排序、上传预览和异步状态交互
- 同步网站与客户端构建别名、依赖和项目文档

components.json

@@ -0,0 +1,19 @@
+{
+  "$schema": "https://ui.shadcn.com/schema.json",
+  "style": "new-york",
+  "rsc": false,
+  "tsx": true,
+  "tailwind": {
+    "config": "",
+    "css": "src/index.css",
+    "baseColor": "neutral",
+    "cssVariables": true,
+    "prefix": ""
+  },
+  "aliases": {
+    "components": "@genarrative/shared/components",
+    "ui": "@genarrative/shared/components/ui",
+    "utils": "@genarrative/shared/lib/utils",
+    "lib": "@genarrative/shared/lib"
+  }
+}