Merge pull request #5030 from dotCooCoo/fix/issue-3748-r

Fix #3748: in isolation mode, art outside a clip group's mask can be selected and dragged

docs/target-app-parity.md

@@ -826,6 +826,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
     Select by Artboards (Object › Plug-ins › Selection Tools, a VectorCraft addition: #5525, #5548, #5549) selects the objects overlapping, fully inside or fully outside one or more chosen artboards (`addon.select.byArtboards {artboards, relation}`). Overlapping is All on Active Artboard's test, shared as `select::on_artboard`; Fully inside means within one artboard, edges included; Fully outside means on none. It looks at what Select All takes, so hidden, locked and locked-artboard art stays out. Its dialog lists each artboard's number, name and size in the document's units, filters by name, chooses rows with click, Shift-click and Cmd/Ctrl-click, and fits a row's artboard in the window on double-click (`view.goToArtboard`). Tests: `crates/engine/src/cmd/addons/select/tests.rs`, `crates/ui-egui/src/addons/select/tests.rs`, `crates/engine/tests/command_sweep.rs`.
     Select by Link Status (Object › Plug-ins › Selection Tools and the Links panel menu, a VectorCraft addition: #5526) selects the image objects and placed documents whose link is linked (its file found unchanged), embedded, missing or modified, as `links.list` reports it (`addon.select.byLinkStatus {status, ids?, add?, zoom?}`); Select Linked, Embedded, Missing and Modified are off when no image has that status and add to the selection with Shift. Objects that are hidden or locked, inside a hidden or locked object or layer, on a template layer, on a locked artboard, or outside the isolated group are left out (the `select::is_selectable` test) and returned with the reason, and the status bar says how many, in plural forms of every catalog. Select by Link Status… lists each image and placed document with its name, status and format, searches by name, filters by status, picks rows with checkboxes and All / None, and zooms to the selection with the existing Zoom to Selection (`addon.arrange.zoomSelection`). Missing-link markers on the canvas are #5547. Tests: `crates/engine/src/cmd/addons/select/tests.rs` (`by_link_status`), `crates/ui-egui/src/addons/select/link_status/tests.rs`, `crates/engine/tests/command_sweep.rs`.
     A marquee selects a clip group, or an object on a layer with a clipping mask, only when it reaches the area inside the clipping path, and it measures the art only within that path's bounds. Within the bounds of a mask that is not a rectangle, it can still select art that the mask hides. Direct Selection's marquee still selects the hidden anchor points inside it (#2345).
+    When a clip group, a layer with a clipping mask or a single object in one is isolated, the Selection, Direct Selection and Group Selection tools also select the art that the mask hides, by a click or a marquee, and a drag from that art moves it (#3748). In isolation mode the canvas Unlock submenu also lists that art when it is locked. Outside isolation mode a click selects clipped art only inside the mask.
     A marquee selects a Shaper Group only when it reaches the art the group shows, not the original shapes kept under it, and Direct Selection's clicks and marquee do not select those shapes' anchor points. In Construction mode a marquee selects the original shapes, and Direct Selection selects their anchor points.
     While an opacity mask or a pattern is edited, a Shaper double-click on a Shaper Group in the mask or pattern art selects the original shape under the pointer without entering Construction mode, the Shaper Group's mode widget does not show, and a Shaper scribble, Release and Expand keep the editing layer isolated.
     A marquee selects an Intertwine group only when it reaches one of the group's members, as for a plain group, and it selects a repeat only when it reaches one of the copies the repeat draws. Direct and Group Selection's marquees select the anchor points of an Intertwine group's members, not the group, and Group Selection's E marquee selects the members inside it.