feat: Enhance Stream Management with Abort Functionality

- Updated the abort endpoint to support aborting ongoing generation streams using either streamId or conversationId.
- Introduced a new mutation hook `useAbortStreamMutation` for client-side integration.
- Added `useStreamStatus` query to monitor stream status and facilitate resuming conversations.
- Enhanced `useChatHelpers` to incorporate abort functionality when stopping generation.
- Improved `useResumableSSE` to handle stream errors and token refresh seamlessly.
- Updated `useResumeOnLoad` to check for active streams and resume conversations appropriately.

api/server/controllers/agents/request.js

@@ -140,6 +140,10 @@ const ResumableAgentController = async (req, res, next, initializeClient, addTit
 
     client = result.client;
 
+    if (client?.sender) {
+      GenerationJobManager.updateMetadata(streamId, { sender: client.sender });
+    }
+
     res.json({ streamId, status: 'started' });
 
     let conversationId = reqConversationId;