M4.9: Preserve frame rate when nested or in render queue, Preserve resolution when nested

Composition Settings ▸ Advanced has both options (they were missing from the model, the
renderer and the dialog):
- Preserve frame rate: nested in another comp, the comp shows only its own frames
  (`EvalCtx::nested_time` floors the precomp layer's source time to the nested comp's frame
  rate; used for the nested frame, its proxy, aux channels, collapsed transformations and the
  viewer's internal wireframes), and the Render Queue renders it at its own rate whatever the
  Frame Rate override (`RenderSettings::rate`).
- Preserve resolution: nested in a comp rendered at Half / Third / Quarter, it renders at full
  size and the buffer's scale places it.
- `comp.settings {preserveFrameRate, preserveResolution}`, `comp.info` reports them, scripts
  read and set `CompItem.preserveNestedFrameRate` / `preserveNestedResolution`, Pre-compose
  copies them, and the dialog registers `dialog.comp.preserveFrameRate` /
  `dialog.comp.preserveResolution`.

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

crates/script/src/model.rs

@@ -131,6 +131,7 @@ fn item(s: &Session, a: &J) -> R {
                         "draft3d": c.draft_3d, "shutterAngle": c.shutter_angle, "shutterPhase": c.shutter_phase,
                         "motionBlurSamplesPerFrame": c.motion_blur_samples,
                         "motionBlurAdaptiveSampleLimit": c.motion_blur_adaptive_limit,
+                        "preserveNestedFrameRate": c.preserve_frame_rate, "preserveNestedResolution": c.preserve_resolution,
                         "renderer": match c.renderer { effectcraft_project::Renderer::Classic3D => "ADBE Classic 3D", effectcraft_project::Renderer::Advanced3D => "ADBE Advanced 3d" },
                         "open": s.state.open_comps.contains(&cid), "active": s.active_comp_id() == Some(cid),
                         "hasVideo": true, "hasAudio": c.layers.iter().any(|l| l.switches.audio && matches!(l.source, LayerSource::Footage { .. } | LayerSource::Comp { .. })),

crates/script/src/prelude.js

@@ -1409,6 +1409,8 @@ CompItem.prototype.constructor = CompItem;
   def("shutterAngle", function () { return this.__info().shutterAngle; }, function (v) { this.__settings({ shutterAngle: __num(v) }); });
   def("shutterPhase", function () { return this.__info().shutterPhase; }, function (v) { this.__settings({ shutterPhase: __num(v) }); });
   def("motionBlurSamplesPerFrame", function () { return this.__info().motionBlurSamplesPerFrame; }, function (v) { this.__settings({ motionBlurSamples: __num(v) }); });
+  def("preserveNestedFrameRate", function () { return this.__info().preserveNestedFrameRate; }, function (v) { this.__settings({ preserveFrameRate: !!v }); });
+  def("preserveNestedResolution", function () { return this.__info().preserveNestedResolution; }, function (v) { this.__settings({ preserveResolution: !!v }); });
   def("renderer", function () { return this.__info().renderer; }, function (v) {
     this.__settings({ renderer: String(v).toLowerCase().indexOf("advanced") >= 0 ? "advanced3D" : "classic3D" });
   });

crates/script/src/tests.rs

@@ -484,3 +484,21 @@ fn motion_graphics_template_hooks_add_mirrors_and_controllers() {
     let eg = c.essential.as_ref().unwrap();
     assert!(matches!(eg.controls[1].kind, effectcraft_engine::project::essential::EgKind::Mirror { of } if of == eg.controls[0].id));
 }
+
+#[test]
+fn comp_preserves_nested_frame_rate_and_resolution() {
+    let mut s = session();
+    let o = ok(
+        &mut s,
+        r#"
+        var comp = app.project.items.addComp("Nested", 320, 180, 1, 2, 12);
+        var before = [comp.preserveNestedFrameRate, comp.preserveNestedResolution];
+        comp.preserveNestedFrameRate = true;
+        comp.preserveNestedResolution = true;
+        before.concat([comp.preserveNestedFrameRate, comp.preserveNestedResolution]).join(",");
+        "#,
+    );
+    assert_eq!(o.result, json!("false,false,true,true"));
+    let (_, c) = comp_named(&s, "Nested");
+    assert!(c.preserve_frame_rate && c.preserve_resolution);
+}