Gradient tool handles (a drawn vector's start and end, the end handle and the moved start) snap to anchors, edges
and smart guides, with the guide overlays; Shift constrains to 45° steps from the Constrain Angle preference
(`ToolContext::constrain_angle`, `constrain_angle_from` in geom). Double-clicking a toolbar button runs the new UI
command `tool.options {tool}`: the Gradient tool opens the Gradient panel, the Eyedropper opens Eyedropper Options
(`eyedropper.setOptions {appearance?, transparency?}`, which `appearance.copyFrom` honours and its params override).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The Gradient panel gains the Fill/Stroke proxy, a thumbnail menu of the document's gradient swatches with Save to
Swatches, Angle and Aspect Ratio fields with preset menus (the shared spin field), Show/Hide Options, and a stop
colour row whose eyedropper samples the next colour clicked on art into the selected stop (Eyedropper tool option
`stop`, `paint.sampleColor {stop}`). On the slider a selected midpoint diamond shows and sets its midpoint in
Location, double-clicking a stop opens the shared stop popover, Alt-drag copies a stop and Alt-dropping it on
another swaps their colours (`swap_stop_colors`), and a dropped colour swatch adds or recolours a stop. Clicking a
stop no longer falls through to the add-stop strip. Swatch tiles and the gradient thumbnail drag onto art, which
paints the object under the pointer through `paint.setFill`/`paint.setStroke {ids}`. The panel, the popover and
the Color panel share one stop-writing helper.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
No behaviour change: every command keeps its id, label, menu, shortcut and
params doc.
- Engine: swatch.* -> cmd/swatch.rs, graphicStyle.* -> cmd/style.rs,
appearance.* (incl. copyFrom) -> cmd/appearance.rs, stroke.set/setAdvanced
-> cmd/stroke.rs, paint.editGradient/setGradientGeom -> cmd/gradient.rs.
Shared helpers in cmd/mod.rs: leaf_targets/paint_targets (replacing three
copies) and unique_name (swatch and graphic style naming).
- UI: dialogs.rs -> dialogs/ with one file per dialog and a DialogSpec
registry (one DialogKind row per dialog); shared field widgets in
dialogs/form.rs. Headless frame tests draw and confirm every dialog.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
