fix: unify anchor IDs between VitePress and GitHub with custom slugify

Add GitHub-compatible slugify (github-slugger algorithm) to VitePress
config so heading anchor IDs are consistent across both platforms.
Update all inline anchor links in 22 doc files accordingly.

docs/.vitepress/config.mts

@@ -1,5 +1,19 @@
 import { defineConfig } from 'vitepress'
 
+// GitHub-compatible slugify (matches github-slugger algorithm)
+// Makes heading anchor IDs consistent between VitePress and GitHub rendering
+function slugify(str: string): string {
+  return str
+    .replace(/<[^>]*>/g, '')
+    .replace(/&lt;/g, '<')
+    .replace(/&gt;/g, '>')
+    .replace(/&amp;/g, '&')
+    .trim()
+    .toLowerCase()
+    .replace(/[^\p{L}\p{M}\p{N}\p{Pc}\- ]/gu, '')
+    .replace(/ /g, '-')
+}
+
 const zhSidebar = [
   {
     text: '快速开始',
@@ -136,6 +150,12 @@ export default defineConfig({
   lastUpdated: true,
   base: '/',
 
+  markdown: {
+    anchor: {
+      slugify,
+    },
+  },
+
   head: [
     ['script', { async: '', src: 'https://www.googletagmanager.com/gtag/js?id=G-D42DM82263' }],
     ['script', {}, `window.dataLayer = window.dataLayer || [];\nfunction gtag(){dataLayer.push(arguments);}\ngtag('js', new Date());\ngtag('config', 'G-D42DM82263');`],