feat: lighten ai agent admin frontend

web/apps/web-ele/src/components/ai-chat-panel/composables/useEventHandler.ts

@@ -28,7 +28,7 @@ interface EventHandlerConfig {
   running: Ref<boolean>;
   conversationId: Ref<null | string>;
   // 设计预览回调
-  onDesignPreview?: (data: DesignPreviewData) => void;
+  onDesignPreview?: (data: DesignPreviewData) => string | void;
 }
 
 /** 生成消息 ID */
@@ -104,10 +104,12 @@ export function useEventHandler(config: EventHandlerConfig) {
     };
 
     // 调用设计预览回调
-    onDesignPreview?.(previewData);
+    const customWaitingContent = onDesignPreview?.(previewData);
 
     // 显示提示消息
-    const waitingContent = `**${configData.title}**\n\n${configData.message || '请在右侧面板中确认或编辑设计'}`;
+    const waitingContent =
+      customWaitingContent ||
+      `**${configData.title}**\n\n${configData.message || '请在右侧面板中确认或编辑设计'}`;
     const initialMsg = messages.value.find((m) => m.id === msgId);
     if (initialMsg && !initialMsg.content?.trim()) {
       updateAssistantMessage(msgId, {