Add UI polish: connection indicator, tab title, empty states

Browser polish:
- Add green connection status indicator (turns red on disconnect)
- Update browser tab title to show connected Lisp (e.g. "ICL - SBCL 2.5.10")
- Add empty state messages to panels ("Select a package...", etc.)

CI fix:
- Commit OPEN-SOURCE-NOTICES.txt instead of generating on CI
- Remove Makefile dependency on ocicl for builds

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>