bug: "Last login" shows ambiguous weekday with no date for logins older than today

[yash113gadia]

Description

In the User Information panel, the Last login field uses formatTimestamp (packages/react/src/lib/formatTimestamp.js), which renders any timestamp that isn't from today as just a weekday + time, with no date:

return isDifferentDay
  ? `${date.toLocaleDateString('en-US', { weekday: 'long' })} ${formattedTime}`
  : formattedTime;

isDifferentDay is only "not today", so every past login collapses to a bare weekday. A login from 3 months ago — or even over a year ago — shows the same kind of string as one from last week, with no way to tell them apart.

Steps to reproduce

1. Open the User Information panel for a user whose last login was more than a few days ago.
2. Look at the Last login field.

Actual behavior

The field shows only a weekday and time, e.g.:

login 90 days ago : "Tuesday 10:49 PM"   (actual: Tue Mar 03 2026)
login 400 days ago: "Sunday 10:49 PM"    (actual: Apr 27 2025 — over a year ago)

A 14-month-old login is indistinguishable from a recent one, and no year is ever shown.

Expected behavior

For timestamps that aren't from today, show an unambiguous date (with year), e.g. "Mar 3, 2026, 10:49 PM".

Notes

The codebase already does this correctly elsewhere — the adjacent created at field uses formatTimestampGetDate ("March 5, 2026"), and Message.js formats dates via date-fns format(date, 'MMMM d, yyyy'). So this is an inconsistency in formatTimestamp specifically.

I found this while reading the date-formatting helpers and would like to work on it.

File: packages/react/src/lib/formatTimestamp.js