refine chart style

Author: Jicheng Lu

src/routes/chat/[agentId]/[conversationId]/rich-content/rc-js-interpreter.svelte

@@ -55,6 +55,6 @@
         <div class="mb-3">{message.text}</div>
     {/if}
     <div id={`js-interpreter-scrollbar-${scrollbarId}`}>
-        <div id={`chart-${message?.message_id}`} style="min-width: 1000px;"></div>
+        <div id={`chart-${message?.message_id}`} style="min-width: 1000px; max-height: 500px;"></div>
     </div>
 </div>