Merge pull request #6496 from dotCooCoo/feat/ruler-artboard-guides

Guides: an option makes Cmd/Ctrl ruler drags artboard guides

docs/mcp.md

@@ -1986,6 +1986,12 @@ Guides off, View › Snap to Point pulls it onto anchors. In the desktop app a g
 same way and is made where it is released over the canvas (with the Artboard tool, as an artboard guide of the
 active artboard), a guide dropped off the canvas onto its ruler is deleted, and hidden guides (View › Guides › Hide
 Guides) can't be picked. An artboard guide is picked, drawn and snapped to across its artboard only.
+Preferences › Guides & Grid › Artboard Guides with Cmd/Ctrl + Ruler Drag (`cmdRulerDragArtboardGuides`, off by
+default) is VectorCraft's own option. With it on, Cmd/Ctrl held when a drag leaves a ruler makes the guide an artboard
+guide of the active artboard, with any tool but the Artboard tool, and with the Artboard tool a canvas guide. The key
+is read when the drag starts, so letting it go during the drag keeps the kind of guide. Such an artboard guide shows,
+and is made, only where it lies within the active artboard: a vertical guide between its left and right edges, a
+horizontal guide between its top and bottom. Released anywhere else, it makes no guide and no undo step.
 
 ```json
 {"name":"run_command","arguments":{"command":"guide.add","params":{"vertical":true,"pos":100}}}

docs/target-app-parity.md

@@ -640,6 +640,7 @@ since 2026-10-01.
 Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a feature lands.
 
 - **New ruler guides (G1):** Alt swaps orientation while dragging from either ruler, following the [public shortcut reference](https://helpx.adobe.com/illustrator/using/default-keyboard-shortcuts.html). Preview, snapping and final placement use the current axis. Tool and egui event tests exercise both rulers, modifier changes, cancellation and one-step Undo/Redo; existing-guide Alt-copy and ruler-origin gestures are unchanged.
+- **Artboard guides with Cmd/Ctrl + ruler drag:** VectorCraft's own option, Preferences › Guides & Grid › Artboard Guides with Cmd/Ctrl + Ruler Drag (`cmdRulerDragArtboardGuides`), off by default. With it on, Cmd/Ctrl held when a drag leaves a ruler makes a guide of the active artboard, and with the Artboard tool a canvas guide; the key is read when the drag starts. The guide is made only where it lies within the active artboard. The documented way to limit a guide to one artboard, dragging it out with the Artboard tool ([Align objects with guides](https://helpx.adobe.com/illustrator/desktop/measure-and-align/grids-and-guides/align-graphic-objects-with-guides.html)), is unchanged when the option is off. Tests `rulerguide::tests::a_guide_within_its_artboard_is_made_only_inside_it`, `tests::menucmds::cmd_ruler_drags_make_guides_of_the_active_artboard_when_the_preference_is_on` and `canvas::tests::cmd_ruler_drags_make_artboard_guides_with_the_preference_on`.
 
 - **Width-point finite-arithmetic follow-up (G1/M3):** Adjoining adjustments avoid intermediate overflow; non-finite normalized or resulting factors are rejected before committing. Engine regressions in `tests/widthpoints.rs` cover finite extremes, small nonzero results, atomic rejection, Undo/Redo and native save/reopen. Historical focused validation on the `a3357121` integration observed 2 expected RED failures with 11 passing controls, then all 13 tests passing with the repair; none were ignored. All three added regressions passed in current full CI. A full CI retry on the five-unit combined source at `a0671777` passed all seven stages with 6,613 test outcomes on 2026-10-14. An earlier full-CI run on the identical source panicked in the randomized `ai_mutated_save_never_panics` test; the cause remains unresolved. This five-fix batch does not claim to repair that failure. Scores and hours unchanged.
 - **Width-point creation (G1):** double-click a stroked segment with the Width tool to open Width Point Edit using sampled side widths. OK creates the point and optionally adjusts adjoining widths in one undo step. Cancel or Delete discards a prospective point without changing the document or redo history. Command and pointer tests cover profiles, compound paths, adjoining adjustment, existing-point editing and Undo/Redo. Message-catalog checks and full CI passed; the original capture verifies opening and Cancel, and the dialog layout was reviewed (2026-10-13: 28 focused Width tests, all seven cargo xtask ci stages, and a headless opening/Cancel capture with original PNG review). [Variable-width strokes](https://helpx.adobe.com/illustrator/using/stroke-object.html).