Improve the frontend 3

services/procurement/app/core/dependencies.py

@@ -0,0 +1,44 @@
+"""
+FastAPI Dependencies for Procurement Service
+"""
+
+from fastapi import Header, HTTPException, status
+from uuid import UUID
+from typing import Optional
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from .database import get_db
+
+
+async def get_current_tenant_id(
+    x_tenant_id: Optional[str] = Header(None, alias="X-Tenant-ID")
+) -> UUID:
+    """
+    Extract and validate tenant ID from request header.
+
+    Args:
+        x_tenant_id: Tenant ID from X-Tenant-ID header
+
+    Returns:
+        UUID: Validated tenant ID
+
+    Raises:
+        HTTPException: If tenant ID is missing or invalid
+    """
+    if not x_tenant_id:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="X-Tenant-ID header is required"
+        )
+
+    try:
+        return UUID(x_tenant_id)
+    except (ValueError, AttributeError):
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail=f"Invalid tenant ID format: {x_tenant_id}"
+        )
+
+
+# Re-export get_db for convenience
+__all__ = ["get_db", "get_current_tenant_id"]