- Added image upload functionality for agents in the backend and frontend.

- Implemented image URL generation based on storage strategy (S3 or local).
- Updated agent creation and update endpoints to handle image files.
- Enhanced frontend components to display agent images with fallbacks.
- New API endpoint to serve images from storage.
- Refactored API client to support FormData for file uploads.
- Improved error handling and logging for image processing.

frontend/src/agents/AgentCard.tsx

@@ -83,9 +83,9 @@ export default function AgentCard({
       <div className="w-full">
         <div className="flex w-full items-center gap-1 px-1">
           <img
-            src={agent.image ?? Robot}
+            src={agent.image && agent.image.trim() !== '' ? agent.image : Robot}
             alt={`${agent.name}`}
-            className="h-7 w-7 rounded-full"
+            className="h-7 w-7 rounded-full object-contain"
           />
           {agent.status === 'draft' && (
             <p className="text-xs text-black opacity-50 dark:text-[#E0E0E0]">