update readme.md, claude.md, specs/specs.mdx, specs/requirements.mdx , specs/leaderboard_spec.mdx, battlewords/__init__.py, pyproject.toml, #gameplay_guide.md  for these latest changes, as needed. Make changes minimal.
include any new features, bug fixes, or important updates in the documentation.
ensure **Current Version:** is up to date in all relevant files.
ensure **Last Updated:** is current

- Update documentation to reflect UI changes in battlewords/ui.py, including:
  - Leaderboard navigation is now in the footer menu, not the sidebar.
  - Game over dialog integrates leaderboard submission and displays qualification results.
  - Leaderboard page routing uses query parameters and custom navigation links.
  - Footer navigation links to Leaderboard, Play, and Settings pages.
- Make all documentation changes minimal and focused on these UI updates.

Additionally in #readme.md:
- Update Recent Changes to reflect the new UI changes
- Update Known Issues sections to reflect any related bug fixes or improvements.