Auto Fix PR (drive a PR to merge-ready)

Take one open PR by number and make it mergeable without merging it: bring it up to date with the base branch, then iterate review-autofix, CI stabilization, and UI verification until it is approvable, green, and QA-evidenced. Non-blocking review findings (nits, low-severity, out-of-scope) become tracked follow-up issues instead of blocking the PR. Fork PRs keep the carry-forward supersede/credit rules. The PR is left merge-ready with normalized labels; the actual merge stays with om-approve-merge-pr / om-merge-buddy behind the QA gate.

This skill is an orchestrator: it holds the outer claim and coordinates om-auto-review-pr (review + autofix + conflict/fork handling), om-auto-qa-pr (UI QA), and om-followup-issue-from-pr (nit follow-ups), plus the built-in CI stabilization procedure (references/stabilize-ci.md); it does not re-implement the delegated skills' logic. It is the PR-side counterpart to om-auto-fix-issue (issue-side chain).