fix: make commit sync use safe sync flow

Rename commit push action to Commit & sync
Use fetch and rebase before pushing committed changes
Keep sync result toasts consistent

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

@@ -425,9 +425,9 @@ export const dict: Record<I18nKey, string> = {
   'gitView.commit.generate': '생성',
   'gitView.commit.generateAria': '커밋 메시지 생성',
   'gitView.commit.messagePlaceholder': '커밋 메시지',
-  'gitView.commit.push': '푸시',
-  'gitView.commit.pushAria': '푸시',
-  'gitView.commit.pushing': '푸시 중…',
+  'gitView.commit.push': 'Commit & sync',
+  'gitView.commit.pushAria': 'Commit and sync',
+  'gitView.commit.pushing': 'sync 중…',
   'gitView.commit.selectFilesHint': '커밋하려면 변경 사항에서 파일을 선택하세요.',
   'gitView.commit.title': '커밋',
   'gitView.common.cancel': '취소',