Alerts page shows last 24h instead of current day alerts (frontend timezone filtering might be missing)

[fe51]

Pitch

As a user, on the alerts page, I only want to see alerts from the current day, not alerts from the last 24 hours.
I thought this bug had already been fixed, but I can still reproduce it in production.
A screenshot illustrating the issue is available below

What is done currently

The alerts list currently displays alerts from the previous rolling 24-hour window instead of restricting results to alerts created today according to the user’s local timezone.

What has to be done

Only alerts created during the current calendar day should be displayed (from 00:00 to 23:59 in the user’s timezone).

Technical Note

Filtering must be handled on the frontend side, since only the frontend knows the user’s timezone.

Thanks a lot for your help 🙏

[theo-rodrigues-dev]

What we see in production

Screenshot shows Dernière mise à jour: 10:02:16 and 4 cards dated 15/04/2026
labeled "23 heures" / "1 jour". So today is 16/04/2026, but yesterday's alerts
are still displayed.

The fix already exists on main

The alerts page filters the API response on the client side:

// src/pages/AlertsPage.tsx:34–37
const todayAlerts = useMemo(
  () => (alertList ?? []).filter((alert) => isDateToday(alert.started_at)),
  [alertList]
);

isDateToday parses the ISO date as UTC, converts to the user's local zone,
and compares calendar days:

// src/utils/dates.ts:122–129
export const isDateToday = (dateStr: string | null): boolean => {
  if (!dateStr) return false;
  const date = isoToDatetime(dateStr);
  const today = DateTime.now();
  return date.hasSame(today, 'day');
};

The unit tests pass.

The bug doesn't come from the server: the API returning a rolling 24h window is by design, since only the frontend knows the user's timezone.

I think the production build simply doesn't include the commit that fixes this. The original fix was merged on Feb 2, 2026 (c358b0a, PR #176).
What is the latest production version, and does it include this commit ?