Add multi-session auth and changelog tracking

client/src/pages/Videos.tsx

@@ -9,6 +9,7 @@ import { Skeleton } from "@/components/ui/skeleton";
 import { Slider } from "@/components/ui/slider";
 import { Textarea } from "@/components/ui/textarea";
 import { Input } from "@/components/ui/input";
+import { formatDateShanghai, formatDateTimeShanghai } from "@/lib/time";
 import { toast } from "sonner";
 import {
   BarChart3,
@@ -145,7 +146,7 @@ function buildClipCueSheet(title: string, clips: ClipDraft[]) {
     `   时长: ${formatSeconds(Math.max(0, clip.endSec - clip.startSec))}\n` +
     `   来源: ${clip.source === "manual" ? "手动" : "分析建议"}\n` +
     `   备注: ${clip.notes || "无"}`
-  )).join("\n\n") + `\n\n视频: ${title}\n导出时间: ${new Date().toLocaleString("zh-CN")}\n`;
+  )).join("\n\n") + `\n\n视频: ${title}\n导出时间: ${formatDateTimeShanghai(new Date())}\n`;
 }
 
 function createEmptyVideoDraft(): VideoCreateDraft {
@@ -440,7 +441,7 @@ export default function Videos() {
                             ) : null}
                             <span className="inline-flex items-center gap-1 text-xs text-muted-foreground">
                               <Clock className="h-3 w-3" />
-                              {new Date(video.createdAt).toLocaleDateString("zh-CN")}
+                              {formatDateShanghai(video.createdAt)}
                             </span>
                             <span className="text-xs text-muted-foreground">
                               {((video.fileSize || 0) / 1024 / 1024).toFixed(1)}MB