feat: add Computer Use architecture docs and fix all anchor links

- Add Computer Use architecture deep dive documentation (CN/EN)
  with 4 generated diagrams (architecture, security gates,
  Python Bridge, patch environment comparison)
- Move Computer Use section below Skills in sidebar and README
- Fix 153 broken anchor links across 18 documentation files:
  - CN docs: add missing `、` after Chinese numeral prefixes
  - EN docs: add missing `_` prefix for number-starting heading IDs
  - Fix em-dash and special character encoding in anchor hrefs

docs/.vitepress/config.mts

@@ -11,12 +11,6 @@ const zhSidebar = [
       { text: '常见问题', link: '/guide/faq' },
     ],
   },
-  {
-    text: '功能',
-    items: [
-      { text: 'Computer Use', link: '/features/computer-use' },
-    ],
-  },
   {
     text: '记忆系统',
     collapsed: false,
@@ -45,6 +39,14 @@ const zhSidebar = [
       { text: '实现原理', link: '/skills/02-implementation' },
     ],
   },
+  {
+    text: 'Computer Use',
+    collapsed: false,
+    items: [
+      { text: '功能指南', link: '/features/computer-use' },
+      { text: '架构解析', link: '/features/computer-use-architecture' },
+    ],
+  },
   {
     text: '参考',
     collapsed: true,
@@ -66,12 +68,6 @@ const enSidebar = [
       { text: 'FAQ', link: '/en/guide/faq' },
     ],
   },
-  {
-    text: 'Features',
-    items: [
-      { text: 'Computer Use', link: '/en/features/computer-use' },
-    ],
-  },
   {
     text: 'Memory System',
     collapsed: false,
@@ -100,6 +96,14 @@ const enSidebar = [
       { text: 'Implementation', link: '/en/skills/02-implementation' },
     ],
   },
+  {
+    text: 'Computer Use',
+    collapsed: false,
+    items: [
+      { text: 'Guide', link: '/en/features/computer-use' },
+      { text: 'Architecture', link: '/en/features/computer-use-architecture' },
+    ],
+  },
   {
     text: 'Reference',
     collapsed: true,