fix(apollo-vertex): assistant message buble width

Author: pieman1313

apps/apollo-vertex/registry/ai-chat/components/ai-chat-message.tsx

@@ -49,7 +49,7 @@ export function AiChatMessage({
           aria-hidden="true"
         />
       </div>
-      <div className="flex flex-col gap-1 w-[85%]">
+      <div className="flex flex-col gap-1 max-w-[85%]">
         <span className="text-xs text-muted-foreground font-medium">
           {displayName}
         </span>