feat: add video delete button for uploaded videos

static/app.js

@@ -132,23 +132,6 @@
     return m + ':' + (s < 10 ? '0' : '') + s;
   }
 
-  function formatRelativeTime(timestamp) {
-    var now = Math.floor(Date.now() / 1000);
-    var diff = now - timestamp;
-    if (diff < 0) diff = 0;
-    if (diff < 60) return 'just now';
-    if (diff < 3600) {
-      var mins = Math.floor(diff / 60);
-      return mins + (mins === 1 ? ' minute ago' : ' minutes ago');
-    }
-    if (diff < 86400) {
-      var hrs = Math.floor(diff / 3600);
-      return hrs + (hrs === 1 ? ' hour ago' : ' hours ago');
-    }
-    var days = Math.floor(diff / 86400);
-    return days + (days === 1 ? ' day ago' : ' days ago');
-  }
-
   /* ------------------------------------------------
      Model Cards — select/deselect, highlight
   ------------------------------------------------ */
@@ -320,6 +303,23 @@
   loadExistingVideos();
 })();
 
+function formatRelativeTime(timestamp) {
+  var now = Math.floor(Date.now() / 1000);
+  var diff = now - timestamp;
+  if (diff < 0) diff = 0;
+  if (diff < 60) return 'just now';
+  if (diff < 3600) {
+    var mins = Math.floor(diff / 60);
+    return mins + (mins === 1 ? ' minute ago' : ' minutes ago');
+  }
+  if (diff < 86400) {
+    var hrs = Math.floor(diff / 3600);
+    return hrs + (hrs === 1 ? ' hour ago' : ' hours ago');
+  }
+  var days = Math.floor(diff / 86400);
+  return days + (days === 1 ? ' day ago' : ' days ago');
+}
+
 /* ============================================================
    Status Page — polling, live preview, result updates
    ============================================================ */