Export: the art's bounds take in the effects of groups, type and images

The bounds of the visible art (`vectorcraft_render::encode::art_bounds`)
are the crop of Export with Use Artboards off, EPS without artboards,
Export for Screens' Full Document and Save for Web (Legacy) with Clip to
Artboard off, and the size Fit to Artwork Bounds gives an artboard. They
measured a group or layer by its members and left out its own effects,
and measured type and images without their effects. A group's drop
shadow, or the shadow of a line of type, was cut off at the image's edge
and left outside the fitted artboard. They also counted a Shaper group's
transparent source art.

Each visible object is now measured by `vectorcraft_render::effect_bounds`,
the measure of Export Selection's crop. A group or layer without effects
of its own is still measured by its visible members, skipping a Shaper
group's source art. A group or layer with a drop shadow, a glow or another
raster effect is measured without its hidden members, guides and template
layers, unless it is a Shaper group or also has a geometry, Pathfinder,
Crop Marks or 3D effect or a visible effect on its own fill or stroke.
The SVG of a chosen artboard also keeps an object whose effects alone
reach the artboard.

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

docs/mcp.md

@@ -502,7 +502,9 @@ Draw, look, export:
 
 Export As goes through `options` too: for PNG, JPEG and WebP `useArtboards: true` writes one file per artboard (all,
 or `range`), named `<file>-<artboard>.<ext>`, and returns `{path, files}` (a PDF keeps them as pages of one file; an
-SVG writes one file per artboard of a `range`); `useArtboards: false` exports the bounds of the visible art.
+SVG writes one file per artboard of a `range`); `useArtboards: false` exports the bounds of the visible art with what
+its effects paint, the effects of groups, type and images included. `artboard.fitToArt` measures the art the same
+way.
 
 Raster exports take more options in `options`: `ppi` (72, 150, 300…; stored in the file), `background`
 (`transparent`, `white`, `black` or `"#rrggbb"`), `antiAlias` (`none`, `art`, `type`: text snapped to pixels) and,
@@ -1581,8 +1583,8 @@ its symbol is missing, when its symbol or a symbol nested in its art holds an in
 nest 32 deep in its art. PDF and EPS export and the SVG of an artboard leave out art outside the page or artboard, and
 Skip Blank Artboards skips an artboard with no art on it. For both, the box of an instance whose art holds brushed
 strokes grows by 16 times the widest stroke (at least 1 pt) of the objects in its art that have a brushed stroke,
-plus 8 pt. The SVG of an artboard also keeps an object that holds an instance when the effects in the symbol's art, or
-the instance's own, paint onto the artboard.
+plus 8 pt. The SVG of an artboard also keeps an object whose effects paint onto the artboard, and an object that holds
+an instance when the effects in the symbol's art, or the instance's own, paint onto it.
 
 ## Expand
 

docs/target-app-parity.md

@@ -384,6 +384,8 @@ since 2026-10-01.
 
 - **Effects in Export Selection and asset crops:** File › Export Selection, Asset Export, Export for Screens' Assets tab and CSS Properties' rasterized art crop each object to the bounds the renderer measures for what it draws: drop shadows, glows, geometry effects such as Offset Path, a group's own effects and the effects in a symbol's art. A brushed path is cropped to its visual bounds, and a Shaper group is cropped to the art it shows. `assets.list` reports the same crop. Engine tests export a square with each effect, a group with a shadow and an asset with a shadow, and check that the effect is inside the image. Public reference: a [Community Expert answer](https://community.adobe.com/t5/illustrator-discussions/exporting-assets-adds-transparent-borders/m-p/10708713/highlight/true) traces the extra area of exported assets to the raster effects' area (Document Raster Effects Settings › Add Around Object).
 
+- **Effects in the art's bounds:** Export with Use Artboards off, Fit to Artwork Bounds, and the other exports of the whole art (EPS without artboards, Export for Screens' Full Document, Save for Web (Legacy) with Clip to Artboard off) measure each visible object as the export crops above do. The drop shadows and other effects of groups, layers, type and images are inside the image or the artboard. A Shaper group without effects of its own is measured by the art it shows, and the hidden members of a group with a drop shadow, a glow or another raster effect do not count unless it is a Shaper group or also has a geometry, Pathfinder, Crop Marks or 3D effect or a visible effect on its own fill or stroke. The SVG of an artboard keeps an object whose effects alone reach the artboard. Tests measure a group, type and an image with a drop shadow, export a group and type with Use Artboards off and fit an artboard to them.
+
 - **Selected artboard deletion:** the Artboards panel menu, panel trash button and Properties use the same selected set; selecting all retains artboard 1. Pointer-event tests cover nonadjacent and single selections, the original first-board survivor, ordinary artwork, Undo/Redo and the single-board guard. Public reference: [Delete artboards](https://helpx.adobe.com/illustrator/desktop/create-manage-artboards/add-edit-artboards/delete-artboards.html).
 - **Artboard history selection:** headless pointer/key tests in `panels/properties.rs` pass for panel New → Undo → Delete/Backspace/Properties, Duplicate → Undo → Delete, pruning removed indices and preserving valid multiselection. They assert board survivors, artwork and object selection, Move/Scale Artwork options, saved state and Undo/Redo. Full workspace CI passes.
 - **Artboard tab-switch follow-up:** changing the active document through its tab aligns the Artboard tool with the displayed board before Properties Delete; clicking the already-active tab preserves multiselection and Move/Scale Artwork options. Three headless `chrome::tests::artboard_document_tab_*` regressions cover actual tab A → B → A clicks followed by Properties Delete, surviving boards and guides, preserved artwork/symbols and Undo/Redo; controls cover same-tab multiselection, Move/Scale Artwork options and other tools. Historical focused validation on `dbd2497b` recorded one expected RED failure with two passing controls, then all three GREEN tests passed. All three also passed in historical full CI on `a0671777`. 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.