Prep repo for going public: ignore .claude/, track public/index.html

- Add .claude/ to .gitignore so local Claude Code settings aren't committed.
- Stop ignoring public/ so the Vercel build artifact is tracked, which
  unblocks the build workflow's git diff --exit-code check on fresh clones.

Author: heyitsStylez

.gitignore

@@ -1,6 +1,6 @@
 .DS_Store
 node_modules/
-public/
+.claude/
 .copilot-loop/
 memory/
 *.backup.html