* fix(analytics): show per-student last seen from login and session activity
Return ISO last-seen timestamps from course analytics instead of
pre-formatted strings so the dashboard can format them per student.
Batch-fetch last seen for all students and include session activity
alongside login events for more accurate, distinct values.
Co-authored-by: Rotimi Best <rotimi-best@users.noreply.github.com>
* fix(analytics): destructure first row from getLastLogin query results
Promise.all returns an array per Drizzle select; nested destructuring
is required so loggedInAt and updatedAt are read from row objects.
Co-authored-by: Rotimi Best <rotimi-best@users.noreply.github.com>
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Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: Rotimi Best <rotimi-best@users.noreply.github.com>
