Add improvements 2

gateway/app/routes/pos.py

@@ -8,6 +8,7 @@ import httpx
 import logging
 
 from app.core.config import settings
+from app.core.header_manager import header_manager
 
 logger = logging.getLogger(__name__)
 router = APIRouter()
@@ -45,9 +46,8 @@ async def _proxy_to_pos_service(request: Request, target_path: str):
     try:
         url = f"{settings.POS_SERVICE_URL}{target_path}"
 
-        # Forward headers
-        headers = dict(request.headers)
-        headers.pop("host", None)
+        # Use unified HeaderManager for consistent header forwarding
+        headers = header_manager.get_all_headers_for_proxy(request)
 
         # Add query parameters
         params = dict(request.query_params)