fix: add _inject_user to rbac module for OPC routers

dashboard/backend/rbac.py

@@ -4,7 +4,7 @@ import threading
 import tempfile
 from typing import Optional
 from pydantic import BaseModel
-from fastapi import HTTPException, Request, status
+from fastapi import HTTPException, Request, status, Depends
 
 import config
 
@@ -136,3 +136,16 @@ def require_write():
         if user.role == "viewer" and request.method != "GET":
             raise HTTPException(status_code=403, detail="Read-only access")
     return checker
+
+
+async def _inject_user(request: Request, user = Depends(lambda: None)):
+    """Dependency to store user in request.state for rbac dependencies.
+
+    Note: This expects auth to be handled by a parent dependency.
+    Import auth module at runtime to avoid circular imports.
+    """
+    if user is None:
+        import auth as auth_module
+        user = await auth_module.get_current_user(request)
+    request.state.user = user
+    return user