M13.5: Layer Style dialog

LYR-9: Layer > Layer Styles > Layer Style Options... (layer.style.options)
and choosing a style from that menu open a Layer Style dialog: style list
with check boxes (Blending Options first) and the selected style's controls
built from its layerStyles properties, edited live through prop.set (one
undo step per control); Cancel rolls back everything done since it opened.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/engine/src/commands/frontend.rs

@@ -16,6 +16,7 @@ pub fn specs() -> Vec<CommandSpec> {
     vec![
         // Application.
         fe!("app.about", "About EffectCraft...", [], None, "{}", always),
+        fe!("layer.style.options", "Layer Style Options...", ["Layer", "Layer Styles"], None, "{layer?, style?: blendingOptions|dropShadow|…}", has_layers),
         fe!(
             "app.settings",
             "Settings...",

crates/engine/src/menus.rs

@@ -674,6 +674,8 @@ Layer
     Matte with Layer Above | layer.trackMatte {"op":"above"}
     Matte with Layer Below | layer.trackMatte {"op":"below"}
   Layer Styles
+    Layer Style Options... | layer.style.options
+    ---
     Convert to Editable Styles | layer.style.convertToEditable
     Show All | layer.style.showAll
     Remove All | layer.style.removeAll

crates/engine/src/tests_tail.rs

@@ -271,7 +271,8 @@ fn tate_chu_yoko_via_set_text_with_undo_and_serde() {
     let lay = effectcraft_text::layout_doc(&doc);
     assert!((lay.glyphs[1].origin.y - lay.glyphs[2].origin.y).abs() < 1e-6, "the digits share a row");
     let back = roundtrip(&s);
-    let effectcraft_keyframe::Value::Text(d) = &back.comp(s.active_comp_id().unwrap()).unwrap().layer(LayerId(t)).unwrap().props.prop("text/sourceText").unwrap().value
+    let effectcraft_keyframe::Value::Text(d) =
+        &back.comp(s.active_comp_id().unwrap()).unwrap().layer(LayerId(t)).unwrap().props.prop("text/sourceText").unwrap().value
     else {
         panic!()
     };