重构后端服务架构并优化前端错误处理

fastapi-backend/app/main.py

@@ -0,0 +1,45 @@
+from fastapi import FastAPI, Request, Depends
+from fastapi.middleware.cors import CORSMiddleware
+from app.api import auth, users, orders, payments
+from app.core.config import settings
+from app.db.database import engine, Base
+from app.middleware.error_handler import error_handler
+from fastapi.exceptions import RequestValidationError
+from starlette.exceptions import HTTPException as StarletteHTTPException
+
+# Create database tables
+Base.metadata.create_all(bind=engine)
+
+app = FastAPI(
+    title="活牛采购智能数字化系统API",
+    description="活牛采购智能数字化系统后端API接口",
+    version="1.0.0",
+)
+
+# Add CORS middleware
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],  # In production, specify exact origins
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# Add exception handlers
+app.add_exception_handler(StarletteHTTPException, error_handler)
+app.add_exception_handler(RequestValidationError, error_handler)
+app.add_exception_handler(Exception, error_handler)
+
+# Include routers
+app.include_router(auth.router, prefix="/api/auth", tags=["auth"])
+app.include_router(users.router, prefix="/api/users", tags=["users"])
+app.include_router(orders.router, prefix="/api/orders", tags=["orders"])
+app.include_router(payments.router, prefix="/api/payments", tags=["payments"])
+
+@app.get("/")
+async def root():
+    return {"message": "活牛采购智能数字化系统后端服务", "version": "1.0.0"}
+
+@app.get("/health")
+async def health_check():
+    return {"status": "healthy"}