fix(styles): apply active creation defaults

Resolve style properties before editors and previews open.
Use absolute annotation multipliers for style-driven objects.

Refs #401

Refs #431

src/scene/mod.rs

@@ -8,6 +8,7 @@
 pub mod annotative;
 pub mod cache;
 pub mod convert;
+pub mod creation_style;
 pub mod model;
 pub mod pick;
 pub mod pipeline;
@@ -3800,6 +3801,28 @@ impl Scene {
         self.scale_handle_ensuring("1:1")
     }
 
+    pub(crate) fn creation_annotation_multiplier(&self) -> f64 {
+        if self.current_layout == "Model" {
+            return self.annotation_scale.max(1.0e-9) as f64;
+        }
+        let Some(handle) = self.active_viewport else {
+            return 1.0;
+        };
+        let Some(EntityType::Viewport(viewport)) = self.document.get_entity(handle) else {
+            return 1.0;
+        };
+        let paper_to_model = vp_effective_scale(
+            viewport.custom_scale,
+            viewport.view_height,
+            viewport.height,
+        );
+        if paper_to_model.is_finite() && paper_to_model > 1.0e-9 {
+            1.0 / paper_to_model
+        } else {
+            1.0
+        }
+    }
+
     pub fn set_annotation_scale_named(&mut self, name: &str) -> Option<Handle> {
         let handle = self.scale_handle_ensuring(name)?;
         let ObjectType::Scale(scale) = self.document.objects.get(&handle)? else {