feat(docs): add NavGrid/NavCard components and restructure stage pages

- Add NavGrid.vue and NavCard.vue components for better navigation layout
- Restructure stage-0 index pages across languages into intro.md with new navigation components
- Remove old stage-0 index.md files and update stage-3 pages similarly
- Add new dependencies 'claude' and 'codex' to package.json
- Improve code formatting in multiple Vue components for better readability
- Update documentation content and structure for better user experience

docs/.vitepress/theme/components/appendix/auth-design/shared/components.js

@@ -1,7 +1,11 @@
 // auth-design 公共组件配置
 
 // 生成按钮类名
-export const getButtonClasses = (variant = 'primary', disabled = false, size = 'medium') => {
+export const getButtonClasses = (
+  variant = 'primary',
+  disabled = false,
+  size = 'medium'
+) => {
   const base = 'auth-demo-btn'
   const classes = [base]
 
@@ -83,7 +87,10 @@ export const getTableRowClasses = (highlight = false, index = 0) => {
 }
 
 // 生成图标容器类名
-export const getIconContainerClasses = (size = 'medium', variant = 'default') => {
+export const getIconContainerClasses = (
+  size = 'medium',
+  variant = 'default'
+) => {
   return `auth-icon-container auth-icon-container-${size} auth-icon-container-${variant}`
 }