完善客户端模块与工作区能力

src/pages/Chat/ChatMessage.tsx

@@ -671,10 +671,10 @@ function MessageBubble({
               <span>{deliveryLabel}</span>
             </div>
           )}
-          <p className="whitespace-pre-wrap break-words break-all text-sm">{text}</p>
+          <p className="chat-message-body whitespace-pre-wrap break-words break-all">{text}</p>
         </>
       ) : (
-        <div className="chat-assistant-message-markdown prose prose-sm max-w-none break-words break-all text-foreground">
+        <div className="chat-message-body chat-assistant-message-markdown prose max-w-none break-words break-all text-foreground">
           <ReactMarkdown
             remarkPlugins={[remarkGfm, remarkMath]}
             rehypePlugins={[[rehypeKatex, { strict: false, throwOnError: false, output: 'html' }]]}