claude@clouddev1
d6c5674bf5
The undo ring is local working state, handled at all three project-file seams (R13): - .gitignore template ignores /.snapshots/ - export excludes .snapshots/ (like playground.db / history.log) - safely_delete_temp_project allowlists .snapshots/ so a temp that was modified then undone back to empty stays auto-deletable - undo::SNAPSHOTS_DIR is now a pub const referenced by all three - tests: gitignore content, export exclusion, cleanup allowlist 1693 passed / 0 failed / 1 ignored; clippy clean.