MobileDeviceRow now handles three binding states driven by
boundToPlan / releaseRequestedAt from the UserDevice type:
- Bound, no release pending: blue "Gebunden" badge next to device name;
trash icon replaced by lock-open icon → Alert → requestRelease()
- Release active (countdown running): footer shows "Freigabe in Xh Ymin"
in amber; close-circle icon → Alert → cancelRelease()
- Current device (isCurrent): existing behaviour unchanged, no action
button regardless of binding state
releaseAt is computed client-side as releaseRequestedAt + 24h — avoids
a backend round-trip for the countdown display.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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