feat(view): add visual style previews

- preview render modes on hover without committing
- distinguish 2D and 3D wireframe fill and depth behavior

Refs #483

src/scene/convert/tess.rs

@@ -712,6 +712,7 @@ pub(crate) fn tessellate_entity(
             world_width: 0.0,
             depth_override: None,
             fill_is_3d: false,
+            fill_is_2d_solid: false,
             pick_tris,
             pick_tris_low,
             dash_from_start: false,
@@ -961,6 +962,7 @@ pub(crate) fn tessellate_entity(
             world_width: 0.0,
             depth_override: None,
             fill_is_3d: false,
+            fill_is_2d_solid: false,
             pick_tris: Vec::new(),
             pick_tris_low: Vec::new(),
             dash_from_start: false,
@@ -1402,6 +1404,7 @@ fn lod_stub_wire(
         world_width: 0.0,
         depth_override: None,
         fill_is_3d: false,
+        fill_is_2d_solid: false,
         pick_tris: Vec::new(),
         pick_tris_low: Vec::new(),
         dash_from_start: false,
@@ -1491,6 +1494,7 @@ fn lod_stub_wire_3d(
         world_width: 0.0,
         depth_override: None,
         fill_is_3d: false,
+        fill_is_2d_solid: false,
         pick_tris: Vec::new(),
         pick_tris_low: Vec::new(),
         dash_from_start: false,