Brushes: dragging a brush reorders it within its type

The reference app reorders a brush that is dragged to a new place in
its Brushes panel, among the brushes of its type only. VectorCraft's
Brushes panel could not reorder brushes, and no command moved one.

brush.move {name | names, to?, type?} moves brushes to index to among
the brushes of their type, in brush.list order, as one undo step. A
move that keeps the order records no step. Brushes of different types,
or a type other than theirs, are refused with "brushes move only within
their type". In the Brushes panel, a brush dragged onto another brush
of its type goes before or after it by the half of the tile or row
under the pointer, and a bar marks the slot while it is held there. A
brush dropped on a brush of another type stays where it is, and the
status bar shows the refusal.

Docs: docs/mcp.md, docs/target-app-parity.md.

docs/mcp.md

@@ -446,6 +446,11 @@ in the app runs `paint.setFill` (or `paint.setStroke`, the active proxy) with `i
 The Swatches panel menu's commands: `swatch.addUsedColors {selection?, global?}`, `swatch.unused` (a query: the
 names Select All Unused selects), `swatch.merge {names}` (the first is kept), `swatch.ungroup {name}` and
 `swatch.sortByKind`.
+`brush.move {name | names, to?, type?}` reorders brushes among the brushes of their type, as dragging one onto
+another of its type in the Brushes panel does. `to` is an index among the brushes of that type in `brush.list`
+order: the brushes go before the first brush of that type at or after `to` that is not moving, and after the last
+brush of that type when there is none or `to` is left out. A move that keeps the order records no undo step.
+Brushes of different types, or a `type` other than theirs, are refused with "brushes move only within their type".
 Document colour mode: `file.new {colorMode: "cmyk"}` starts a CMYK document with CMYK default swatches, and RGB
 colors applied to it (`paint.setFill`/`setStroke` colors, gradient stops and freeform points, `paint.editGradient`
 stops, `paint.freeform.addPoint`/`setPoint`, `paint.sampleColor`, `object.mesh.setPointColor`/`addLine`, the

docs/target-app-parity.md

@@ -588,6 +588,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
     A Space+Shift drag rotates the view whatever the tool, as a Rotate View tool drag does, and Shift does not round the angle to 15°.
   - **Swatches panel clicks:** Ctrl/Cmd-clicking New Swatch makes a spot color, and Ctrl/Cmd+Shift-clicking it makes a global process color.
   - **Panel drag and drop:** art dragged off the canvas onto the Symbols panel becomes a symbol, onto the Swatches panel a pattern swatch and onto the Brushes panel an Art brush; a symbol dragged onto the canvas places an instance where it is dropped, and a brush dragged onto a path is applied to it.
+    In the Brushes panel, a brush dragged onto another brush of its type goes before or after it, by the half of the tile or row the pointer is over, and a bar marks the slot while the brush is held there (`brush.move`); the move is one undo step. Brushes move only within their type, as the [Brushes](https://web.archive.org/web/20241230205225/https://helpx.adobe.com/illustrator/using/brushes.html) page states ("You can move brushes only within their type"): a brush dropped on a brush of another type stays where it is, and the status bar shows "brushes move only within their type".
     In the Swatches panel, Alt-dragging a swatch onto another swatch of its kind (not a tint swatch) replaces that swatch's color, gradient or pattern, and the swatch keeps its name and place.
   - **Tool double-clicks:** double-clicking a tool's button opens its options: Hand fits the artboard in the window, Zoom shows 100 %, Rotate, Scale, Reflect and Shear open their Object › Transform dialogs, the Selection, Direct Selection and Group Selection tools the Move dialog (Enter opens these seven tools' dialogs too; Move opens on the offset of the last drag or Move and with the checkboxes it was last confirmed with, so Enter, Enter repeats a move or a copy at the same spacing, as [an Adobe Community thread](https://community.adobe.com/questions-652/move-tool-771221) describes), Gradient, Eyedropper, Blend and the Liquify tools their panels or options, the Pencil, Paintbrush, Smooth, Blob Brush and Eraser tools their Tool Options (Fidelity, fill, Keep selected, the tolerances, the brush size), and (#812) the Flare tool its Flare Tool Options, the Artboard tool the active artboard's Artboard Options, the graph tools Graph Type for the selected graph, the Symbolism tools the Symbolism Tools Options (Diameter, Intensity, Symbol Set Density) and the Magic Wand tool its panel.
     In the Pencil and Paintbrush Tool Options, Edit selected paths within 0 px turns editing off, so a stroke that starts exactly on an end of a selected open path draws a new path; Close paths when ends are within 0 px turns closing off, so a stroke that ends exactly where it started stays open.