Selection: a click on a drop shadow or glow selects the object under it

Clicks, the hover pointer and marquees with the selection tools already
leave out the area that raster effects paint beyond an object. New tests
in crates/engine/src/tests/select_effects.rs hold that in place for drop
shadows, Outer Glow and Gaussian Blur on paths, groups, point type,
symbol art and images, for Shift-click, Direct Selection, the hover
pointer, a drag from a selected object's shadow and a marquee. hit_leaf
gets a doc comment, and docs/target-app-parity.md gets a line citing
https://helpx.adobe.com/illustrator/using/selecting-objects.html.

docs/target-app-parity.md

@@ -595,6 +595,7 @@ since 2026-10-01.
 - **Copy and Cut of anchors picked with a lent Direct Selection (#6123):** with the Pen or the Curvature tool, Cmd/Ctrl held lends Direct Selection for the gesture; the anchors and segments it picks are what Edit › Copy and Cut take once the key is let go, as with Direct Selection chosen, while the last anchor the Pen leaves selected as it draws still makes Copy take the whole path (#2122). A Cmd gesture that leaves the selection as it was (a Shift marquee over nothing) picks nothing. Regression test: `tests::draw2::pen_cmd_selected_anchors_are_what_copy_and_cut_take`.
 - **Cut of picked anchors (#6361):** Edit › Cut removes direct-selected anchors from their path and from a compound path's member, with the segments attached to them, as Clear does. Picked segments still lose only those segments. When a path also has a picked segment, Cut removes and copies only its picked segments and ignores its picked anchors, on every contour, as Clear does; an anchor left without a surviving segment is removed with them. Regression tests: `cut_*_anchors_*` and `cut_of_an_anchor_with_a_segment_on_another_contour_leaves_the_source_as_clear_does` in `crates/engine/tests/it/copy_direct_selection.rs`.
 - **Escape in Selection tool drags:** Escape during a Selection tool move or Alt-drag copy, a bounding-box scale or rotation, a marquee, or a corner widget, pie widget or bracket drag cancels it: the art returns to its state at the press, no copy is left, no undo step is added, the release does nothing, and the tool stays chosen. This is VectorCraft's own behavior. Regression tests: `escape_cancels_*` in `select/tests.rs` and `pie.rs`, and `escape_cancels_a_selection_tool_move_copy_scale_or_rotation` in `tests/selectescape.rs`.
+- **Clicks pass through raster effects:** clicks with the Selection and Direct Selection tools, and the Selection tool's pointer and marquee, leave out the area that a drop shadow, a glow, a blur or another raster effect paints beyond an object. A click on a shadow selects the object under it, or nothing over an empty canvas, and a press on the shadow of a selected object does not move it ([the help page](https://helpx.adobe.com/illustrator/using/selecting-objects.html)). No setting changes this. This covers paths, groups, type, symbol instances and images. Regression tests: `crates/engine/src/tests/select_effects.rs`.
 - **Global Edit: Shift-click leaves a match out:** while Global Edit is on, a Shift-click with the Selection tool on a highlighted match, or on an object inside a matched group, leaves that match out (`select.globalEditExclude`): it is no longer highlighted and later edits leave it as it is; the object the edit started from stays, and Global Edit ends when fewer than two matches are left ([Update assets quickly with Global Edit](https://helpx.adobe.com/ph_fil/illustrator/how-to/global-editing-sensei.html)). Regression tests: `a_shift_click_*`, `an_object_left_out_*`, `a_group_left_out_*` and `leaving_out_all_but_one_*` in `crates/engine/src/tests/globaledit.rs`.
 - **Global Edit Options in the Control bar:** while Select › Start Global Edit can run, the Control bar shows a Global Edit Options dropdown that opens the same options as the Properties panel's (Match: Appearance, Size; On Artboards; Include Objects On Canvas; Result(s)); both set the same options. The dropdown is off while Global Edit is on; it sits after Recolor Artwork, ahead of the X/Y/W/H fields ([Edit similar objects globally](https://helpx.adobe.com/illustrator/desktop/manage-objects/edit-objects/edit-similar-objects.html)). Regression test: `the_control_bar_shows_the_global_edit_options` in `crates/ui-egui/src/chrome/tests.rs`.
 - **Global Edit's enabled check on large paths:** the check that decides whether Select › Start Global Edit can run on the selected path, compound path or symbol instance (which the Control bar makes every frame) measures the box of its anchors and handles instead of building and normalizing a copy of every anchor, with the same answer. On a 200,000-anchor path the check takes 0.7 ms instead of 2.2 to 3.0 ms. Regression tests: `support_*` in `crates/engine/src/cmd/globaledit.rs`.