Add VitePress site with local login and deployment docs

Enable static site build on port 12100 with Express session auth, auto sidebar, and DEPLOY.md for Ubuntu/NPS setup.

Co-authored-by: Cursor <cursoragent@cursor.com>

.vitepress/config.mts

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+import path from 'node:path'
+import { fileURLToPath } from 'node:url'
+import { defineConfig } from 'vitepress'
+import { missingAssetsPlugin } from './missing-assets-plugin.mjs'
+import { generateSidebar } from './sidebar.mts'
+
+const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..')
+
+export default defineConfig({
+  title: 'DAO DE JING',
+  description: '传统文化典籍资料库',
+  lang: 'zh-CN',
+  srcDir: '.',
+  srcExclude: [
+    '**/node_modules/**',
+    '**/.vitepress/**',
+    '**/server/**',
+    '**/金瓶梅/**',
+    '**/黄帝内经/**',
+    '.env.production',
+    '**/健康学习到150岁 - 人体系统调优不完全指南/**',
+    '**/梅花/**',
+  ],
+  cleanUrls: true,
+  ignoreDeadLinks: true,
+  themeConfig: {
+    nav: [
+      { text: '首页', link: '/' },
+      { text: '五行', link: '/金、木、水、火、土%20-%20五行/' },
+      { text: '道德经', link: '/道德经/01' },
+      { text: '周易', link: '/周易/' },
+      { text: '中医', link: '/中医宝典/' },
+    ],
+    sidebar: generateSidebar(),
+    outline: { level: [2, 4] },
+    search: {
+      provider: 'local',
+    },
+  },
+  vite: {
+    plugins: [missingAssetsPlugin()],
+    server: {
+      host: '0.0.0.0',
+    },
+    publicDir: path.join(root, '.vitepress', 'public'),
+  },
+})