fix: ENOENT download error for archive-only converters (PDFMathTranslate/MinerU)

- Add existsSync checks in download.tsx before file access
- Fix normalizeFiletype.ts: md-t/md-i return original format (not tar.gz)
- Add outputMode: 'archive' support in main.ts with auto .tar suffix
- PDFMathTranslate outputs translated-<lang>.pdf + bilingual-<lang>.pdf (no original)
- MinerU outputs complete folder in .tar with logging
- Hide preview icon for .tar files in results.tsx
- Update Bun version: 1.2.2 -> 1.3.6
- Add Step 19: auto-deploy to remote server after Docker push

All 159 tests pass.

.github/workflows/docker-build-remote.yml

@@ -691,3 +691,48 @@ jobs:
           generate_release_notes: true
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      # ========================================
+      # Step 19: 更新遠端 ConvertX-CN 服務
+      # 說明：拉取最新映像並重新啟動服務（所有步驟完成後執行）
+      # ========================================
+      - name: 🔄 更新遠端 ConvertX-CN 服務
+        run: |
+          echo "========================================"
+          echo "🔄 更新遠端 ConvertX-CN 服務"
+          echo "========================================"
+
+          tailscale ssh ${{ secrets.SSH_USER }}@${{ secrets.SSH_HOST }} << 'REMOTE_EOF'
+          set -e
+
+          # 1. 進入專案資料夾
+          cd /home/bioailab/miniconda3/lid/app/convertx-cn
+
+          # 2. 停止服務
+          echo "📋 停止服務..."
+          docker compose down
+
+          # 3. 拉取最新映像檔
+          echo ""
+          echo "📋 拉取最新映像檔..."
+          docker compose pull
+
+          # 4. 重新啟動
+          echo ""
+          echo "📋 重新啟動服務..."
+          docker compose up -d
+
+          # 5. 顯示服務狀態與 log
+          echo ""
+          echo "📋 服務狀態："
+          docker compose ps
+
+          echo ""
+          echo "📋 服務 log（最近 100 行）："
+          docker logs convertx-cn --tail=100
+
+          echo ""
+          echo "✅ ConvertX-CN 服務已更新完成"
+          REMOTE_EOF
+
+          echo "========================================"