outdated state

website/src/locales/en.json

@@ -557,5 +557,10 @@
     },
     "webgl2_required": "WebGL 2 is required to display the map.",
     "enable_webgl2": "Learn how to enable WebGL 2 in your browser",
-    "page_not_found": "page not found"
+    "page_not_found": "page not found",
+    "outdated": {
+        "title": "This page is out of date",
+        "description": "Your files were saved by a newer version of gpx.studio, which this page cannot read. Reload the page to get the latest version.",
+        "reload": "Reload"
+    }
 }