Brainstorm output for inventory container-switching. Key decision from
the brainstorm: the handoff conflated two orthogonal retail mechanisms —
the open-container TRIANGLE (0x06005D9C, UpdateOpenContainerIndicator) and
the selected-item SQUARE (0x06004D21, ItemList_SetSelectedItem). User
confirmed both are real (a bag is just an item, so it gets the square too)
and chose to ship both this phase, the square uniform across grid+bags and
visual-only (no selected-object-bar wiring yet).
Pins the ViewContents full-REPLACE (ACE writes entries OrderBy
PlacementPosition, no slot field -> ContainerSlot=index), the Use 0x0036 ->
ViewContents 0x0196 round-trip, and the 6 touched files.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
