fix: simplify existing pull request header

Reflow PR status and checks into a cleaner two-row header
Remove the remote selector from existing PRs
Keep remote context as read-only tracking info

packages/ui/src/lib/i18n/messages/ko.ts

@@ -616,6 +616,7 @@ export const dict: Record<I18nKey, string> = {
   'gitView.pr.checkDetails.empty': '체크 상세 정보 없음',
   'gitView.pr.checkDetails.title': '실패한 체크 상세',
   'gitView.pr.checkingStatus': 'PR 상태 확인 중…',
+  'gitView.pr.checks.label': 'checks',
   'gitView.pr.checks.completedLabel': '완료됨',
   'gitView.pr.checks.conclusionLabel': '결론',
   'gitView.pr.checks.startedLabel': '시작됨',