Closes the known limitation from the previous commit: NotificationsScreen
had the identical plain-text state-label gap, in a separate screen/enum
(NotificationSubjectState, which also has an UNKNOWN case). Adds its own
StatusBadge composable with the same color roles, mapping UNKNOWN to the
neutral surfaceVariant treatment VisibilityBadge already uses for private.
Live-verified on-device: notifications 전체 list shows all three real
colors side by side (닫힘/병합됨/열림).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
choiminyeong
ca999a7bb8