v1.1.7

Release v1.1.7

Features:
- Auto-download assets on GUI startup when missing (no more manual /pet update for assets)
- Add 'Update Assets' option in Settings menu for manual asset refresh
- Add zip crate for in-binary asset extraction

Fixes:
- Fix test_claude_session_end: SessionEnd maps to 'closed' not 'offline'
- Improve download_dlc error message
- Always default assets_dir to ~/.claude/pet-data/assets

Docs:
- Update HOOKS.md: SessionEnd -> closed for Claude adapter
- Update CLAUDE.md: document assets auto-download, zip dependency, test CI
- Simplify /pet update in all SKILL.md: remove manual assets download steps

Other:
- Add GitHub Actions test pipeline (cargo test on push to main, all platforms)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>