.ai import: Scatter brushes in Tints open in Tints, and brush art drops its frame

A Scatter brush in a .ai or EPS file's editing data always came into
the Brushes panel keeping its art's colors. A Scatter brush whose last
15 numbers start with 1 now opens in Tints, and one whose numbers start
with 0 keeps its art's colors. Other values are not read and keep the
art's colors. The field before the art's name does not decide it: an
object whose first field is 1 is read by its 15 numbers, and a Scatter
object with 8 numbers is still left out.

A brush's art usually comes in a group after its frame, an unpainted
rectangle around the art. The reader kept that rectangle as part of
the brush's art. It now leaves out a frame at the art's bounds (within
1/1000 pt): an unnamed, unpainted rectangle with its four corners in
order, closed, or open with its first corner again at the end, and no
settings of its own (shown, unlocked, at full opacity in Normal, with
no effects, note or other attributes). A wider frame stays in the art,
and so do a path that crosses the corners, an open path along three
sides and a rectangle with settings of its own. A group left with one
object becomes that object, unless it has a state or look of its own
(hidden, locked, isolated, knockout, an opacity, a blend mode, a name,
a mask, a note or another setting, or an appearance); then it stays a
group without the frame. The rule applies to every brush art section.

Existing files with such brushes now open with Tints and without the
extra frame path in the brush's art. With an exact frame, the pieces
that a Scatter or Art brush draws along a path stay where they were.

The Scatter, Art and Pattern brush colorization options, Tints among
them, are described on pages 281-282 of
https://web.archive.org/web/20210601162814/https://helpx.adobe.com/pdf/illustrator_reference.pdf#page=281

Tests cover Scatter brushes whose numbers start with 1 and 0, with a
first field of 1 and 2, and an 8-number object. They cover frames kept
or left out (exact, wider, open, filled, named, crossing the corners,
along three sides, with a note, Show Center or hidden), a group's own
state and note kept, and the pieces a Scatter and an Art brush draw
along a path with and without the frame. The import fuzz test reads
brush art after frames of any corners and paint.

docs/target-app-parity.md

@@ -1281,6 +1281,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
     Blends and envelopes in the definitions of a `.ai`'s symbols, patterns and brushes' art count against the same per-file limits on blend layout and envelope checks as the layers' art, so a file with many definitions does not get those limits again for each one (`crates/eps/src/import/ai/read/directives.rs`).
     A `.ai` or EPS whose editing data has brushes opens with the file's Calligraphic, Scatter, Art and Bristle brushes in the Brushes panel in place of the default ones, in the file's order: the Calligraphic size, roundness and angle with their variation, the Scatter size, spacing, scatter and rotation, the Bristle settings, and the Scatter and Art brushes' art. A brush library `.ai` (brushes and no layers) opens from its PDF part with its brushes, so Other Library lists them. An Art brush in Tints keeps that colorization. Pattern brushes and brushes that can't be read are left out with a note. Paths with a Calligraphic brush, and paths with an Art brush at 100% in Tints that stretches art of solid-filled paths unflipped, open as the path with the brush on its stroke, and other brushed paths still come in as their drawn look (part of #372 and #637; `crates/eps/src/import/ai/tests.rs`, `crates/eps/src/import/tests_native.rs`).
     In a `.ai` opened from its editing data, a path or type object with Offset Path, Outline Object or Outline Stroke on the whole object opens as itself with those effects live, in their order and shown or hidden; on a fill or stroke of type they stay on that fill or stroke. Offset Path keeps its Offset, Joins and Miter Limit, and Outline Stroke takes its width from the stroke. An Offset Path with a setting missing, out of range or not read keeps the drawn art, as does a path with a Path effect on one fill or stroke (`crates/eps/src/import/ai/style/tests.rs`, `crates/eps/src/import/ai/tests.rs`, `crates/eps/src/import/tests_native.rs`).
+    In a `.ai` or EPS opened from its editing data, a Scatter brush whose last 15 numbers start with 1 comes into the Brushes panel in Tints, and each brush art section is read without its frame, an unnamed, unpainted rectangle with no settings of its own at the art's bounds (within 1/1000 pt). A wider frame stays in the art, and an art group with a state or look of its own (hidden, locked, isolated, knockout, an opacity, a blend mode, a name, a mask, a note or an appearance) stays a group (`crates/eps/src/import/ai/tests.rs`).
     In a `.ai` opened from its editing data, type with Warp on the object or on one of its fills or strokes opens as type with the effect live when the live warp draws as the art saved with it. When it draws differently, or when the file's limit of checks has no check left for it, it opens as that art, and one note says how many did. Type stays live without a comparison when the saved art paints nothing or draws type of its own, in frames of threaded type, when a text variable binds it, and when its text object doesn't come in as one text object (`crates/eps/src/import/ai/envelope.rs`, `crates/eps/src/import/tests_native.rs`).
     In a `.ai` opened from its editing data, an object with a Tweak that moves nothing or Pucker & Bloat at 0 opens as itself with the effect live. A path, compound path or group whose only effect is Transform without copies, or a Free Distort whose corners make a parallelogram, opens as itself with it live, and so does an unstroked path or compound path with straight segments whose only effect is Twist. A gradient or pattern, an image, type, a clipping group, an opacity mask or effects inside the object, or a stroke with a Transform that scales, rotates or reflects, keep the drawn art (`crates/eps/src/import/ai/style/tests.rs`, `crates/eps/src/import/ai/tests.rs`, `crates/eps/src/import/ai/read/ops.rs`).
     A PDF page whose `UserUnit` (PDF 1.6) is above 1 opens at its size in points, its numbers times the `UserUnit` (one above 75,000 counts as 75,000), and `document.pdfInfo` gives its size and boxes in points too. A `.ai` whose editing data has its artboards in the units of such a page opens from that data at the page's size, with its layers, and when the layers can't be read its pages still take the artboard layout of the data, scaled the same way (part of #1482).