完善客户端模块与工作区能力

tests/unit/chat-message.test.tsx

@@ -279,6 +279,9 @@ describe('ChatMessage bubble surface styling', () => {
       'text-foreground',
       'shadow-soft',
     );
+    expect(screen.getByTestId('chat-message-bubble-assistant')
+      .querySelector('.chat-assistant-message-markdown'))
+      .toHaveClass('chat-message-body');
   });
 
   it('does not render a user avatar or an extra row gap', () => {
@@ -345,7 +348,8 @@ describe('ChatMessage LaTeX rendering', () => {
       />,
     );
 
-    expect(screen.getByTestId('chat-message-bubble-assistant').querySelector('.chat-assistant-message-markdown')).toHaveClass('prose', 'prose-sm');
+    expect(screen.getByTestId('chat-message-bubble-assistant').querySelector('.chat-assistant-message-markdown'))
+      .toHaveClass('chat-message-body', 'prose');
   });
 
   it('does not render markdown thematic breaks inside assistant replies', () => {