docs(ai): 添加 RAGFlow MCP 部署文档与 AI 栏目整理

- 新增 Windows 11 RAGFlow + MCP 完整部署记录
- 添加 AI 栏目首页与免费模型 API 文档
- 更新 VuePress 配置与 collections 结构
- 添加缓存清理和文档同步脚本

docs/.vuepress/collections.ts

@@ -29,6 +29,28 @@ export default defineCollections([
       })),
   }),
 
+  defineCollection({
+    type: 'doc',
+    dir: 'notes/ai',
+    title: '模型',
+    linkPrefix: '/ai/',
+    sidebar: [
+      { text: '模型', link: '/ai/' },
+      {
+        text: '部署与工具链',
+        collapsed: false,
+        items: [
+          { text: 'RAGFlow 与 MCP', link: '/article/windows11-ragflow-deployment-mcp/' },
+        ],
+      },
+      {
+        text: '模型与 API',
+        collapsed: false,
+        items: [{ text: '大模型 API 整合', link: '/article/free_model_api/' }],
+      },
+    ],
+  }),
+
   defineCollection({
     type: 'doc',
     dir: 'notes/subject/english',

docs/.vuepress/config.ts

@@ -27,6 +27,13 @@ export default defineUserConfig({
           '@theme/Blog/VPPostItem.vue': path.resolve(__dirname, './theme/Blog/VPPostItem.vue'),
         },
       },
+      /**
+       * 强制预构建含 encodeSVG 的 client 入口，避免 docs/.vuepress/.cache/deps 里残留旧版
+       * @vuepress/helper 导致 dev 下「does not provide an export named encodeSVG」整页白屏。
+       */
+      optimizeDeps: {
+        include: ['@vuepress/helper/client'],
+      },
     },
   }),
   shouldPrefetch: false,

docs/.vuepress/navbar.ts

@@ -9,6 +9,10 @@ export default defineNavbarConfig([
     text: '博客',
     link: '/blog/',
   },
+  {
+    text: '模型',
+    link: '/ai/',
+  },
   {
     text: '学科知识',
     items: [