feat(tests): add comprehensive tests for TokenRouter and related components

- Implement tests for TokenRouter downstream policy, covering allowedRouteIds and site weight multipliers.
- Add tests for TokenRouter patterns and model mapping, including regex pattern matching and model mapping precedence.
- Create tests for BrandIcon component to verify brand detection logic.
- Develop tests for Accounts page, focusing on rebind panel behavior and refresh action on error.
- Introduce fuzzy search utility tests to validate substring and subsequence matching.
- Implement navigation focus helpers tests for building and parsing focus paths.
- Add progressive render tests to ensure correct initial and next visible counts.
- Create route model candidates index tests to validate route candidate indexing and matching logic.

docs/.vitepress/.gitignore

@@ -0,0 +1,2 @@
+dist/
+cache/

docs/.vitepress/config.ts

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+import { defineConfig } from 'vitepress';
+import { withMermaid } from 'vitepress-plugin-mermaid';
+
+export default withMermaid(
+  defineConfig({
+    lang: 'zh-CN',
+    title: 'Metapi 文档',
+    description: 'Metapi 使用文档、FAQ 与教程沉淀',
+    cleanUrls: true,
+    lastUpdated: true,
+    ignoreDeadLinks: true,
+    themeConfig: {
+      siteTitle: 'Metapi Docs',
+      logo: '/logos/logo-icon-512.png',
+      nav: [
+        { text: '首页', link: '/' },
+        { text: '快速上手', link: '/getting-started' },
+        { text: 'FAQ', link: '/faq' },
+        { text: '社区贡献', link: '/community/faq-tutorial-guidelines' },
+        { text: '项目主页', link: 'https://github.com/cita-777/metapi' },
+      ],
+      sidebar: [
+        {
+          text: '开始',
+          items: [
+            { text: '文档首页', link: '/' },
+            { text: '文档总览', link: '/README' },
+            { text: '快速上手', link: '/getting-started' },
+            { text: '部署指南', link: '/deployment' },
+          ],
+        },
+        {
+          text: '使用与配置',
+          items: [
+            { text: '配置说明', link: '/configuration' },
+            { text: '客户端接入', link: '/client-integration' },
+            { text: '运维手册', link: '/operations' },
+          ],
+        },
+        {
+          text: '知识库',
+          items: [
+            { text: '常见问题 FAQ', link: '/faq' },
+            { text: '目录规范', link: '/project-structure' },
+            { text: 'FAQ/教程贡献规范', link: '/community/faq-tutorial-guidelines' },
+          ],
+        },
+      ],
+      socialLinks: [
+        { icon: 'github', link: 'https://github.com/cita-777/metapi' },
+      ],
+      outline: {
+        level: [2, 3],
+      },
+      footer: {
+        message: 'MIT Licensed',
+        copyright: 'Copyright (c) 2026 Metapi Contributors',
+      },
+      search: {
+        provider: 'local',
+      },
+    },
+  }),
+);