- Rename stage-2/intro.md to stage-2/index.md for all languages
- Rename stage-3/intro.md to stage-3/index.md for all languages
- Rename appendix/intro.md to appendix/index.md for all languages
- Update config.mjs navigation links to use /stage-2/ and /stage-3/ instead of /stage-2/intro and /stage-3/intro
- This follows VitePress best practice where index.md is the default page for a directory
- 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
sanbuphy