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Marc-André Bombeck
65ce9fd4c8
v1.4.25 W7 phase 4 — proposal §5.
Adds a per-user timezone picker to /settings#account between
date-of-birth and language. The control is a native <select> over
Intl.supportedValuesOf('timeZone') with a 'use browser timezone'
button that pre-fills detectBrowserTimezone(). Older engines without
Intl.supportedValuesOf fall back to a free-text input — every Chrome
99+/Safari 15.4+/Firefox 99+ ships the API so the fallback is
defensive only.
Form save uses Promise.all over two PUTs:
- /api/auth/profile (email, height, dob, gender)
- /api/auth/me/timezone (single field, dedicated route)
The split keeps the timezone validation + resolver cache
invalidation on a clean path; profile errors don't poison the
timezone write and vice versa.
The new route PUT /api/auth/me/timezone:
- requireAuth gates the cookie + Bearer paths
- 422 on any string the runtime's Intl.DateTimeFormat rejects
- 200 on success, returns the persisted value
- audits 'user.timezone.update' with previous + next
- invalidates the resolver cache so the next read sees the new
value within one tick instead of waiting 60s for the TTL
i18n: 4 new keys (timezone, timezoneHint, timezoneDetect,
timezoneInvalid) in messages/de.json + messages/en.json. Hint copy
follows proposal §5: 'Used for chart axis labels, reminder times,
export timestamps, and AI Coach context. Stored data is unchanged.'
Tests: 6-case suite on the new route covers auth, valid + invalid
zones, empty / missing field, and whitespace trimming.