These files are generated at build time and shouldn't be committed:
- dist/control-ui assets (JS/CSS bundles)
- src/canvas-host/a2ui bundle files
This removes ~100MB+ of bloat from git history by no longer tracking
repeatedly regenerated bundle files. Add to .gitignore to prevent
accidental re-addition.
Co-Authored-By: Claude <noreply@anthropic.com>