- Removed the use of `getResponseSender` for computing display names in both `Agent.js` and `loadAddedAgent.js`.
- Implemented fallback logic to derive display names from `modelLabel`, `modelSpec.label`, and `endpointConfig.modelDisplayLabel`.
- Enhanced comments for clarity on the new display name resolution process.
- Updated `useChatFunctions` and `createDualMessageContent` to accommodate changes in sender logic, ensuring consistent handling of ephemeral agents across the application.