fix table and field agent on formField

- show Host to Host
- set field agent to optional with default value `''`

src/pages/master/provider/blocks/EditDialog.tsx

@@ -145,7 +145,7 @@ const EditDialog = () => {
         type: response?.data.type,
         status: response?.data.status,
         transaction_type: response?.data.transaction_type.id,
-        agent: response?.data.agent.id
+        agent: response?.data.agent?.id || ''
       }));
     }
   }, []);