Commands: ids leave out an object listed with a group that holds it, as the selection does

Commands that read the selection through edit::selected_roots leave
out an object whose group is also selected (edit::roots_of). Fourteen
places that read `ids` kept an object listed together with its group.
Given ids that list an object and a group that holds it, Make Repeat
failed with "no such object", New Symbol failed or stored the object
twice in the symbol, and object.transform moved it twice (20 pt for a
10 pt move).

These places now pass explicit ids through edit::outermost, which
drops an id whose ancestor is also listed, with the filter that
roots_of runs on the selection (now edit::without_inner). Nothing else
is dropped or replaced: unlike roots_of, it keeps layers and
compound-path members. A list without nesting gives the same result as
before. Commands that take both ids and the selection as listed, such
as paint.setFill without item, are unchanged.

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

crates/engine/src/cmd/object.rs

@@ -11,7 +11,7 @@ use vectorcraft_doc::{Appearance, Document, Knockout, LiveCorners, LiveShape, No
 use vectorcraft_geom::shapes::CornerKind;
 use vectorcraft_geom::{Affine, FillRule, PathData, Point, Rect, Vec2};
 
-use super::edit::{duplicate_in, selected_roots};
+use super::edit::{duplicate_in, outermost, selected_roots};
 use super::opacitymask::percent;
 use super::*;
 use crate::{EngineError, LastTransform};
@@ -492,7 +492,7 @@ fn resize_type_area(n: &mut Node, xf: Affine) -> bool {
 fn transform(s: &mut Session, p: &Value) -> Result<Value> {
     let m = matrix_param(p, "matrix").ok_or_else(|| bad("object.transform", "missing matrix [a,b,c,d,e,f]"))?;
     let (ids, anchors) = match ids_param(p, "ids") {
-        Some(v) => (v, false),
+        Some(v) => (outermost(&s.doc()?.doc, v), false),
         None => (selected_roots(s)?, bool_or(p, "anchors", false)),
     };
     apply_transform(s, "Transform", ids, m, p, anchors)