fix: 每个视频独立指示牌，不合并——_videos 数组逐个渲染

src/renderer/components/chat-area.ts

@@ -183,11 +183,13 @@ export function appendMessageDOM(msg: ChatMessage, index: number): void {
     contentHtml += '</div>';
   }
 
-  if ((msg as any)._videoFrames && (msg as any)._videoFrames.length > 0) {
+  if ((msg as any)._videos && (msg as any)._videos.length > 0) {
+    for (const v of (msg as any)._videos) {
+      contentHtml += `<div class="msg-video-indicator">🎬 ${v.fileName} · ${v.frameCount} 帧 · 1fps</div>`;
+    }
+  } else if ((msg as any)._videoFrames && (msg as any)._videoFrames.length > 0) {
     const n = (msg as any)._videoFrames.length;
-    const name = (msg as any)._videoMeta?.fileName || '';
-    const label = name ? `${name} · ` : '';
-    contentHtml += `<div class="msg-video-indicator">🎬 ${label}${n} 帧 · 1fps</div>`;
+    contentHtml += `<div class="msg-video-indicator">🎬 ${n} 帧 · 1fps</div>`;
   }
 
   if (msg.files && msg.files.length > 0) {

src/renderer/components/input-area.ts

@@ -1032,11 +1032,7 @@ async function sendMessageWithAgentLoop(text: string, currentSession: ChatSessio
     if (allVids.length > 0) {
       const totalFrames = allVids.flatMap(v => v.frames);
       msg._videoFrames = totalFrames;
-      msg._videoMeta = {
-        fileName: allVids.length === 1 ? allVids[0].name : `${allVids.length}个视频`,
-        duration: allVids[0].dur,
-        frameCount: totalFrames.length
-      };
+      msg._videos = allVids.map(v => ({ fileName: v.name, frameCount: v.count, duration: v.dur }));
     }
     if (userFiles.length > 0) {
       msg.files = userFiles;

src/renderer/types.d.ts

@@ -114,6 +114,8 @@ export interface ChatMessage {
   /** 视频帧数据（用于消息卡片渲染，不走 images 缩略图） */
   _videoFrames?: Array<{ name: string; base64: string; timestampSeconds: number }>;
   _videoMeta?: { fileName: string; duration: number; frameCount: number };
+  /** 多视频独立指示牌 */
+  _videos?: Array<{ fileName: string; frameCount: number; duration: number }>;
   stopped?: boolean;
   toolCalls?: ToolCallRecord[];
   /** 标记此消息为 LLM 压缩摘要生成 */