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/modules/annotate/aligned_dim.rs

@@ -191,6 +191,7 @@ impl CadCommand for AlignedDimensionCommand {
             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,
@@ -245,6 +246,7 @@ fn preview_aligned(p1: DVec3, p2: DVec3, dim_pt: DVec3) -> WireModel {
         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,

src/modules/annotate/angular_dim.rs

@@ -139,6 +139,7 @@ fn preview_wire(points: Vec<Vec3>) -> WireModel {
         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,

src/modules/annotate/diameter_dim.rs

@@ -185,6 +185,7 @@ fn preview_line(a: Vec3, b: Vec3) -> WireModel {
         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,

src/modules/annotate/dim_baseline.rs

@@ -184,6 +184,7 @@ impl CadCommand for DimBaselineCommand {
             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,

src/modules/annotate/dim_continue.rs

@@ -164,6 +164,7 @@ impl CadCommand for DimContinueCommand {
             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,

src/modules/annotate/dimjogline.rs

@@ -90,6 +90,7 @@ impl CadCommand for DimJogLineCommand {
             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,

src/modules/annotate/dimtedit.rs

@@ -107,6 +107,7 @@ impl CadCommand for DimTeditCommand {
             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,

src/modules/annotate/leader_cmd.rs

@@ -233,6 +233,7 @@ fn preview_wire(pts: &[Vec3], arrow_size: f32) -> WireModel {
         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,

src/modules/annotate/linear_dim.rs

@@ -223,6 +223,7 @@ fn preview_wire(points: Vec<DVec3>) -> WireModel {
         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,

src/modules/annotate/mleader_cmd.rs

@@ -205,6 +205,7 @@ fn preview_wire(pts: &[Vec3], arrow_size: f32) -> WireModel {
         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,

src/modules/annotate/mleader_edit.rs

@@ -466,6 +466,7 @@ fn preview_wire(pts: &[Vec3]) -> WireModel {
         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,

src/modules/annotate/ordinate_dim.rs

@@ -126,6 +126,7 @@ fn preview_wire(points: Vec<Vec3>) -> WireModel {
         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,

src/modules/annotate/qdim.rs

@@ -97,6 +97,7 @@ impl CadCommand for QdimCommand {
             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,

src/modules/annotate/radius_dim.rs

@@ -190,6 +190,7 @@ fn preview_wire(points: Vec<Vec3>) -> WireModel {
         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,

src/modules/annotate/table_cmd.rs

@@ -189,6 +189,7 @@ impl CadCommand for TableCommand {
                 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,

src/modules/annotate/tolerance_cmd.rs

@@ -91,6 +91,7 @@ impl CadCommand for ToleranceCommand {
             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,

src/modules/draw/draw/attdef.rs

@@ -188,6 +188,7 @@ impl CadCommand for AttdefCommand {
             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,

src/modules/draw/draw/mline.rs

@@ -170,6 +170,7 @@ impl CadCommand for MlineCommand {
             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,

src/modules/draw/draw/raster_image.rs

@@ -114,6 +114,7 @@ impl CadCommand for ImageCommand {
             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,

src/modules/draw/draw/ray.rs

@@ -89,6 +89,7 @@ impl CadCommand for RayCommand {
             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,
@@ -187,6 +188,7 @@ impl CadCommand for XLineCommand {
             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,

src/modules/draw/draw/revcloud.rs

@@ -96,6 +96,7 @@ impl CadCommand for RevCloudCommand {
             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,

src/modules/draw/inquiry/area.rs

@@ -414,6 +414,7 @@ impl CadCommand for AreaCommand {
             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,

src/modules/draw/inquiry/dist.rs

@@ -81,6 +81,7 @@ impl CadCommand for DistCommand {
             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,

src/modules/draw/inquiry/measuregeom.rs

@@ -72,6 +72,7 @@ impl MeasureGeomCommand {
             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,

src/modules/draw/modify/trim.rs

@@ -4570,6 +4570,7 @@ fn preview_wire(points: Vec<[f32; 3]>, color: [f32; 4], name: &str) -> WireModel
         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,

src/modules/model/primitive_cmd.rs

@@ -310,6 +310,7 @@ fn wire(name: &str, points: Vec<[f32; 3]>) -> WireModel {
         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,

src/modules/view/plot_window.rs

@@ -58,6 +58,7 @@ impl CadCommand for PlotWindowCommand {
             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,

src/modules/view/zoom_window.rs

@@ -77,6 +77,7 @@ impl CadCommand for ZoomWindowCommand {
             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,