Add SOLD OUT badge and improve deployment docs

- Add SOLD OUT overlay on car detail page image
- Add SOLD OUT badge next to car name
- Add Sold Out status in Admin Cars detail view
- Add soldout field to Car TypeScript interface
- Create PRODUCTION_VALUES.md for deployment reference
- Update CLAUDE.md with CRITICAL deployment section
- Update TROUBLESHOOTING.md with recurring errors

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

CLAUDE.md

@@ -8,6 +8,59 @@
 
 ---
 
+# ⛔ CRITICAL: 배포 전 필수 확인사항 (DO NOT SKIP!)
+
+## 🚨 Production 환경 고정값 (절대 변경 금지!)
+
+| 항목 | 올바른 값 | 잘못된 예 |
+|------|----------|----------|
+| **DB_NAME** | `autonet` | ~~mongolcar~~, ~~autonet_db~~ |
+| **DB_PASSWORD** | `roskfl@1122` (@ 포함, URL 인코딩 필요) | - |
+| **API_URL (Frontend)** | `https://autonetsellcar.com` | ~~http://192.168.0.202:8000~~ |
+| **Uploads 경로** | `/opt/autonet/production/backend/uploads` | ~~`/home/damon/mongolcar/data/uploads`~~ |
+| **배포 디렉토리** | `/opt/autonet/production` | ~~`/home/damon/mongolcar`~~ |
+
+## 🚫 절대 하지 말 것
+
+1. **수동 `docker run`에서 환경변수 직접 타이핑 금지** - [PRODUCTION_VALUES.md](./PRODUCTION_VALUES.md)에서 복사만 허용
+2. **DB_NAME 직접 타이핑 금지** - 반드시 `autonet` 복사/붙여넣기
+3. **`.env` 파일 덮어쓰기 금지** - 서버의 기존 `.env` 보존
+4. **`/home/damon/mongolcar/data/uploads` 사용 금지** - 비어있는 잘못된 경로
+
+## ✅ 배포 전 필수 검증 명령어
+
+```bash
+# 1. DB 이름 확인 (반드시 autonet이어야 함!)
+ssh server1 "docker exec postgres-primary psql -U admin -d autonet -c 'SELECT COUNT(*) FROM cars;'"
+
+# 2. Uploads 경로에 파일 있는지 확인
+ssh server2 "ls /opt/autonet/production/backend/uploads/cars/ | head -5"
+
+# 3. 배포 후 API 확인
+curl -s https://autonetsellcar.com/api/hero-banners/ | head -c 100
+```
+
+## 📋 표준 컨테이너 실행 명령어 (복사해서 사용!)
+
+**⚠️ 아래 명령어를 그대로 복사해서 사용하세요. 절대 직접 타이핑하지 마세요!**
+
+### Backend 실행
+```bash
+ssh server2 "docker stop autonet-backend 2>/dev/null; docker rm autonet-backend 2>/dev/null; docker run -d --name autonet-backend --restart unless-stopped -p 8000:8000 -e USE_SQLITE=False -e DB_HOST=192.168.0.201 -e DB_PORT=5432 -e DB_NAME=autonet -e DB_USER=admin -e 'DB_PASSWORD=roskfl@1122' -e REDIS_HOST=192.168.0.201 -e REDIS_PORT=6379 -e 'REDIS_PASSWORD=roskfl@1122' -e SECRET_KEY=YourSuperSecretKeyForJWT123! -e AGENT_API_KEY=AgentApiKey123! -v /opt/autonet/production/backend/uploads:/app/uploads --network mongolcar-network production-backend"
+```
+
+### Frontend 빌드 전 (.env.production 설정)
+```bash
+ssh server2 "echo 'NEXT_PUBLIC_API_URL=https://autonetsellcar.com' > /home/damon/mongolcar/frontend/.env.production"
+```
+
+### Frontend 실행
+```bash
+ssh server2 "docker stop autonet-frontend 2>/dev/null; docker rm autonet-frontend 2>/dev/null; docker run -d --name autonet-frontend --restart unless-stopped -p 3000:3000 --network mongolcar-network production-frontend"
+```
+
+---
+
 ## 1. 프로젝트 구조
 
 ```