fix: 视频指示牌显示文件名，多视频显示'2个视频'

src/renderer/components/chat-area.ts

@@ -185,7 +185,9 @@ export function appendMessageDOM(msg: ChatMessage, index: number): void {
 
   if ((msg as any)._videoFrames && (msg as any)._videoFrames.length > 0) {
     const n = (msg as any)._videoFrames.length;
-    contentHtml += `<div class="msg-video-indicator">🎬 视频帧序列 · ${n} 帧 · 1fps</div>`;
+    const name = (msg as any)._videoMeta?.fileName || '';
+    const label = name ? `${name} · ` : '';
+    contentHtml += `<div class="msg-video-indicator">🎬 ${label}${n} 帧 · 1fps</div>`;
   }
 
   if (msg.files && msg.files.length > 0) {

src/renderer/components/input-area.ts

@@ -1032,7 +1032,11 @@ 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[0].name, duration: allVids[0].dur, frameCount: totalFrames.length };
+      msg._videoMeta = {
+        fileName: allVids.length === 1 ? allVids[0].name : `${allVids.length}个视频`,
+        duration: allVids[0].dur,
+        frameCount: totalFrames.length
+      };
     }
     if (userFiles.length > 0) {
       msg.files = userFiles;