Add new frontend - fix 16

gateway/app/routes/forecasting.py

@@ -12,18 +12,32 @@ from app.core.config import settings
 logger = logging.getLogger(__name__)
 router = APIRouter()
 
-@router.api_route("/forecasts/{path:path}", methods=["GET", "POST", "PUT", "DELETE"])
+@router.api_route("/forecasts/{path:path}", methods=["GET", "POST", "PUT", "DELETE", "OPTIONS"])
 async def proxy_forecasts(request: Request, path: str):
     """Proxy forecast requests to forecasting service"""
     return await _proxy_request(request, f"/api/v1/forecasts/{path}")
 
-@router.api_route("/predictions/{path:path}", methods=["GET", "POST"])
+@router.api_route("/predictions/{path:path}", methods=["GET", "POST", "OPTIONS"])
 async def proxy_predictions(request: Request, path: str):
     """Proxy prediction requests to forecasting service"""
     return await _proxy_request(request, f"/api/v1/predictions/{path}")
 
 async def _proxy_request(request: Request, target_path: str):
     """Proxy request to forecasting service with user context"""
+    
+    # Handle OPTIONS requests directly for CORS
+    if request.method == "OPTIONS":
+        return Response(
+            status_code=200,
+            headers={
+                "Access-Control-Allow-Origin": settings.CORS_ORIGINS_LIST,
+                "Access-Control-Allow-Methods": "GET, POST, PUT, DELETE, OPTIONS",
+                "Access-Control-Allow-Headers": "Content-Type, Authorization, X-Tenant-ID",
+                 "Access-Control-Allow-Credentials": "true",
+                 "Access-Control-Max-Age": "86400"  # Cache preflight for 24 hours
+            }
+        )   
+        
     try:
         url = f"{settings.FORECASTING_SERVICE_URL}{target_path}"