v0.12.1

Merge Overlap Detection

team_merge now detects when you have local changes to files that the agent also modified, and blocks the merge to prevent silent overwrites.

• Overlap detection covers unstaged, staged, and untracked files
• Blocked merges list the conflicting files and preserve the branch for retry
• team_cleanup safety-net warns (non-blocking) when overlap is detected
• Stash-pop warnings are now surfaced in merge output (previously swallowed)
• Graceful fallback if the overlap check itself fails

Full Changelog: v0.12.0...v0.12.1