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/conversations/_components/chat-panel.tsx

@@ -350,7 +350,7 @@ export function ChatPanel() {
   const messagesScroll = (
     <div
       ref={messagesContainerRef}
-      className="h-full min-h-0 flex-1 overflow-y-auto p-4 cs-ai-agent-scrollbar"
+      className="h-full min-h-0 flex-1 overflow-y-auto p-4 agent-desk-scrollbar"
     >
       <div ref={messagesContentRef} className="flex flex-col">
         {!loading && messages.length > 0 && messagesHasMore ? (