* feat(editor): preset-system polish — paint panel, slim action bar, icon rail
- Export `MaterialPaintPanel` so embedders host the paint material picker in
their own panel (community docks it in the Build sidebar) instead of the
bottom action bar.
- ActionMenu: drop the build / material-paint / furnish modes and the
structure-tools palette row + paint tray (the host's Build sidebar owns
building now). Reduce `structure-tools` to the shared `tools` lookup still
used by cursor/floorplan indicators; remove the orphaned `useContextualTools`.
- MaterialPicker: swatches wrap into a fluid `auto-fill` grid that fills width.
- IconRail (tab-bar): bigger icons, grayscale-when-idle, Radix tooltip, w-14
rail; sync `RAIL_WIDTH` to 56.
- Inspector footer: hand the host `footer` to kind-owned custom panels via
`InspectorFooterContext` so the save button renders without per-kind wiring.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* chore: biome format pass
Whole-repo formatter normalization (line wrap/unwrap only, no logic changes)
surfaced by the format-on-edit hook against prior drift. Kept separate from the
feature commit so the preset-system diff stays reviewable.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
