The visitor asked to start over after the call ended.
The visitor asked to retry after an error.
The label shown by the loading skeleton: an explicit message wins, else the phase's default.
The phase to render. A SETTER so a phase change INTO an actionable surface (ended / error) — e.g. a
retry that fails again on the SAME mounted instance — re-homes focus onto its primary action.
Overrides the loading label, the ended sub-message or the error detail.