miscellaneous fixes

- keep base path in recording share links
- reject non-positive scale on recordings/unavailable, which looped forever on the event loop
- reject negative vod event padding, which cleared has_clip
- clamp negative preview gif/mp4 offsets
- don't delete exports that are still in progress
- hash on unknown login usernames so timing doesn't reveal valid users
- include the first minute of the events time-of-day filter
- show an error when the push subscription is refused
- don't wipe an unnamed known plates entry when Add is pressed again
- use elapsed hours for export last N hours so DST doesn't shift the range

web/src/components/config-form/sectionExtras/NotificationsSettingsExtras.tsx

@@ -416,6 +416,13 @@ export default function NotificationsSettingsExtras({
               workerRegistration.unregister();
               setRegistration(null);
             });
+        })
+        .catch(() => {
+          toast.error(t("notification.toast.error.registerFailed"), {
+            position: "top-center",
+          });
+          workerRegistration.unregister();
+          setRegistration(null);
         });
     },
     [addMessage, publicKey, t],