chore: 初始化项目与后端基础工程

backend/app/main.py

@@ -0,0 +1,31 @@
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from app.core.config import get_settings
+from app.core.logging import configure_logging
+
+settings = get_settings()
+configure_logging(settings.log_level)
+
+app = FastAPI(
+    title=settings.app_name,
+    version=settings.app_version,
+    debug=settings.debug,
+)
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=settings.allowed_origins,
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+
+@app.get("/api/health", tags=["health"])
+async def health_check() -> dict[str, str]:
+    return {
+        "status": "ok",
+        "service": settings.app_name,
+        "version": settings.app_version,
+    }