- lib/api.ts: sends x-device-name + x-device-model + x-device-os headers
(cached per session, URL-encoded). Backend persists into user_devices for
visual differentiation in DeviceLimitSheet.
- DeviceLimitReachedSheet: renders name (primary) + model · OS-version
(secondary), "Dieses Gerät"-Pill on isCurrent. Stale phantoms become
distinguishable.
- Profile i18n sweep: 8 keys × 3 languages = 24 fixes — all {{var}} placeholders
switched to %{var} matching i18next config (Vue-i18n leftover from Nuxt-port).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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