Fresh boots opened the owner/token/session stores before EnsureDataRoot
dropped to the host user, leaving a root-owned maestro/ state dir whose
EACCES surfaced as a bogus ERR_INVALID_CREDENTIALS on /api/auth/setup.
main() now runs the handoff first; EnsureDataRoot heals pre-existing
root-owned state dirs while still root (healOwnerState).
Storage failures from the owner store now answer 500 ERR_INTERNAL
everywhere (status/setup/login/change-password/RequireSession/
GateWebSocket) instead of blaming credentials or re-advertising setup
mode; SetupRequired returns the store error instead of swallowing it,
and FileOwnerStore.Verify propagates read errors rather than masking
them as unknown-user.
Admin
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