refactor: rename cs-ai-agent to agent-desk in SDK and related files

- Updated message types in support-host-bridge.ts to use agent-desk prefix.
- Added new agent-desk-sdk.min.js file with updated functionality.
- Removed old cs-ai-agent-sdk.min.js file.
- Modified build-sdk script to generate agent-desk-sdk.min.js.
- Changed scrollbar class names in main.scss from cs-ai-agent to agent-desk.

web/app/dashboard/channels/_components/edit.tsx

@@ -744,7 +744,7 @@ function WebAccessGuide({ channelId }: { channelId: string }) {
     channelId: "${channelId}"
   };
 </script>
-<script async src="${origin}/sdk/cs-ai-agent-sdk.min.js"></script>`
+<script async src="${origin}/sdk/agent-desk-sdk.min.js"></script>`
   }, [channelId, origin])
 
   async function copyText(text: string, successMessage: string) {