Different tables used different date formats: Servers & Tasks used a
fixed "YYYY-MM-DD HH:mm:ss" (24h), while Audit Log, DNS, Integrations
(Tailscale/Semaphore), and Users called plain .toLocaleString() with
no options, which renders using the browser's own locale — different
per browser/OS, and inconsistent with the other pages' fixed format.
- New Settings -> Date & Time page: pick date order (YYYY-MM-DD,
DD/MM/YYYY, MM/DD/YYYY) and 12h vs 24h clock, with a live preview.
- utils/date.ts's formatDateTime() now reads these settings instead of
being hardcoded to sv-SE/24h; the setting is fetched once at app
startup (alongside /api/me) via a new non-secret GET
/api/settings/display (any signed-in user, same rationale as the
badge-color endpoints) and applied immediately on save too, without
needing a page reload.
- Switched every remaining raw new Date(...).toLocaleString() call
(Audit Log, DNS zone sync time, Tailscale/Semaphore last-seen,
Users' last login) over to the shared formatter, so every table now
renders dates identically.
Verified the formatter's date-order x 12h logic against all six
combinations plus the midnight/noon 12h edge cases, and the settings
endpoints end-to-end (defaults, partial updates, validation
rejection, audit logging) against the real dev server.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
bobbanandClaude Sonnet 5
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