fix: chi.URLParam中文未解码导致删除失败，加url.PathUnescape

internal/web/ui.go

@@ -3770,6 +3770,9 @@ func (u *UI) actionAssetVideoSourceDelete(w http.ResponseWriter, r *http.Request
         return
     }
     name := chi.URLParam(r, "name")
+    if decoded, err := url.PathUnescape(name); err == nil {
+        name = decoded
+    }
     if err := u.preview.DeleteVideoSource(name); err != nil {
         http.Redirect(w, r, "/assets/video-sources?error="+urlQueryEscape(err.Error())+"&name="+url.PathEscape(name), http.StatusFound)
         return