fix: avoid opencode structured output session breakage

Replace server-enforced structured output with local JSON parsing for Git generation
Render generated commit and PR JSON responses as compact chat cards
Tighten generation prompts while preserving active session context

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

@@ -1453,6 +1453,13 @@ export const dict: Record<I18nKey, string> = {
   'chat.messageBody.actions.saveAsPlan': '플랜으로 저장',
   'chat.messageBody.actions.startNewSession': '이 응답에서 새 세션 시작',
   'chat.messageBody.actions.startNewMultiRun': '이 응답에서 새 멀티런 시작',
+  'chat.generatedResult.actions.copy': '복사',
+  'chat.generatedResult.actions.copied': '복사됨',
+  'chat.generatedResult.commit.title': '생성된 커밋 메시지',
+  'chat.generatedResult.commit.highlights': '하이라이트',
+  'chat.generatedResult.pullRequest.title': '생성된 Pull Request',
+  'chat.generatedResult.pullRequest.titleLabel': '제목',
+  'chat.generatedResult.pullRequest.bodyLabel': '본문',
   'chat.messageBody.tts.stopSpeaking': '읽기 중지',
   'chat.messageBody.tts.readAloud': '소리 내어 읽기',
   'chat.messageBody.tts.readAloudWithProvider': '소리 내어 읽기({provider} 음성)',