2026-05-18-19-46-56 强制刷新样例视频缓存

backend/main.py

@@ -59,12 +59,14 @@ def samples() -> dict[str, Any]:
     for path in sorted(SAMPLE_DIR.glob("*")):
         suffix = path.suffix.lower()
         if suffix in IMAGE_SUFFIXES | VIDEO_SUFFIXES:
+            version = str(path.stat().st_mtime_ns)
             items.append(
                 {
                     "name": path.name,
-                    "url": _public(path),
+                    "url": f"{_public(path)}?v={version}",
                     "kind": "image" if suffix in IMAGE_SUFFIXES else "video",
                     "size": path.stat().st_size,
+                    "version": version,
                 }
             )
     return {"samples": items}