CRITICAL FIX: Both `gt done` and `gt mq submit` were creating MR
records without pushing the branch to origin first. When polecat
worktrees were deleted, the unpushed branches were lost forever.
This caused 12 MQ items to become orphaned - merge requests existed
but their branches had vanished.
The fix adds a mandatory `git push origin <branch>` before creating
the MR record. If push fails, the MR is not created.
Fixes: gt-aqku
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
849ba242a9