perf(8502): 并行生图(6并发)+超时重试；视频URL直连预览/下载；路径隔离

requirements.txt

@@ -21,9 +21,22 @@ imageio[ffmpeg]>=2.33.0
 Pillow>=10.0.0
 numpy>=1.24.0
 
-# Web UI
+# Web UI (Streamlit - 保留原有调试界面)
 streamlit>=1.29.0
 
+# FastAPI Backend (新增前后端分离)
+fastapi>=0.109.0
+uvicorn[standard]>=0.27.0
+python-multipart>=0.0.6
+
+# Task Queue (异步任务处理，支持水平扩展)
+celery[redis]>=5.3.0
+redis>=5.0.0
+
+# Database
+sqlalchemy>=2.0.0
+psycopg2-binary>=2.9.9
+
 # Config
 python-dotenv>=1.0.0
 PyYAML>=6.0.1