Peer-226: Build-fail - Remove unused code, and small ui update

Author: cyiting

frontend/src/components/blocks/interview/chat/chat-layout.tsx

@@ -141,9 +141,7 @@ export const ChatLayout: React.FC<ChatLayoutProps> = ({
         ))}
         {isLoading && (
           <div className='mb-4 flex justify-start'>
-            <div className='rounded-lg bg-gray-50 px-4 py-2'>
-              <Loader2 className='size-5 animate-spin text-gray-500' />
-            </div>
+            <Loader2 className='size-5 animate-spin text-gray-500' />
           </div>
         )}
         {error && (

frontend/src/components/blocks/interview/chat/chat-message.tsx

@@ -14,20 +14,6 @@ interface ChatMessageProps {
   message: ChatMessageType;
 }
 
-const CodeBlock: React.FC<{ content: string }> = ({ content }) => (
-  <div className='group relative'>
-    <pre className='bg-secondary my-4 overflow-x-auto rounded-md p-4 text-sm'>
-      <code>{content}</code>
-    </pre>
-    <button
-      onClick={() => navigator.clipboard.writeText(content)}
-      className='bg-secondary/80 absolute right-2 top-2 rounded px-2 py-1 text-xs opacity-0 transition-opacity group-hover:opacity-100'
-    >
-      Copy
-    </button>
-  </div>
-);
-
 export const ChatMessage: React.FC<ChatMessageProps> = ({ message }) => {
   return (
     <div className={`flex ${message.isUser ? 'justify-end' : 'justify-start'} mb-4`}>