Fix LucidFlux 404 error and update image paths

- Add Jekyll configuration file (_config.yml) for proper GitHub Pages rendering
- Create main index.md page for the homepage
- Fix LucidFlux page to use index.html instead of LucidFlux.html
- Update all image paths to use relative paths pointing to gallery directory
- Replace absolute image paths with actual gallery images

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: FeiSong123

.gitignore

@@ -1,2 +1,3 @@
 run_cc.sh
-CLAUDE.md
+CLAUDE.md
+.claude