The tooltip fade, a model's animation clock and its OnAnimFinished ran after the whole OnUpdate walk, and OnUpdateModel fired in creation order. A tooltip hidden through its parent also kept its owner and fade.
In the reference, the walk makes one call per frame: its OnUpdate, then its kind's engine update (a tooltip's fade step, a model pane's clock and completion test). OnUpdateModel fires later, from the paint, in draw order. A tooltip's own hide and show run from any caller, its parent's cascade included: the hide un-owns and clears it; the show needs an owner.
The walk now runs a per-kind update in each frame's slot, OnUpdateModel fires per stratum in draw order after the hover re-pick, and show and hide dispatch to a kind's override. CharacterModelBase's override is left for #890.
Tests pin each order and a parent's hide and show.
Fixes#861Fixes#863Fixes#864
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
