Initial commit: AI Video Assistant fullstack platform.

Add pipecat-based backend with WebRTC/WS voice routes, Next.js frontend, and Docker Compose orchestration.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app.py

@@ -0,0 +1,48 @@
+"""FastAPI 入口。挂载路由,放行前端跨域,启动时建表。
+
+启动:  uvicorn app:app --reload --port 8000
+
+路由分组(对齐 dograh 的 routes/ 结构):
+  /health              健康检查
+  /api/assistants      助手 CRUD
+  /api/credentials     模型凭证 CRUD(key 打码)
+  /ws/voice            WebRTC 输出(浏览器)
+  /ws/stream           WS 输出(裸音频流)
+"""
+
+from contextlib import asynccontextmanager
+
+import config
+import uvicorn
+from db.session import init_db
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from routes import assistants, credentials, health, voice_webrtc, voice_ws
+
+
+@asynccontextmanager
+async def lifespan(_app: FastAPI):
+    await init_db()  # MVP:启动建表;表稳定后切 alembic
+    yield
+
+
+app = FastAPI(title="AI Video Assistant 平台 - 后端", lifespan=lifespan)
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=config.CORS_ORIGINS,
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+app.include_router(health.router)
+app.include_router(assistants.router)
+app.include_router(credentials.router)
+app.include_router(voice_webrtc.router)
+app.include_router(voice_ws.router)
+
+
+if __name__ == "__main__":
+    uvicorn.run("app:app", host=config.HOST, port=config.PORT, reload=True)