feat: raster image render pipeline (IMAGE command + GPU textured quad)

- Add IMAGE / IMAGEATTACH / IM command with async file-picker (rfd)
- src/scene/image_model.rs: ImageModel with RGBA pixel data + quad corners
- src/scene/pipeline/image_gpu.rs: ImageGpu with wgpu texture, sampler, opacity uniform
- src/scene/pipeline/mod.rs: image render pipeline (pass 2, between hatches and meshes)
- src/scene/render.rs: include images in Primitive, call upload_images in prepare
- src/scene/mod.rs: images HashMap, populate_images_from_document, cache on add_entity
- src/modules/home/draw/raster_image.rs: ImageCommand (two-click: origin + width, aspect-correct preview)
- src/io/mod.rs: pick_image_file() async helper (file dialog + dimension decode)
- app: ImagePick / ImagePickResult messages, populate on file open and undo/redo

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/modules/annotate/aligned_dim.rs

@@ -87,6 +87,7 @@ impl CadCommand for AlignedDimensionCommand {
             line_weight_px: 1.0,
             snap_pts: vec![],
             tangent_geoms: vec![],
+            aci: 0,
             key_vertices: vec![],
         })
     }
@@ -119,6 +120,7 @@ fn preview_aligned(p1: Vec3, p2: Vec3, dim_pt: Vec3) -> WireModel {
         line_weight_px: 1.0,
         snap_pts: vec![],
         tangent_geoms: vec![],
-        key_vertices: vec![],
+        aci: 0,
+            key_vertices: vec![],
     }
 }

src/modules/annotate/angular_dim.rs

@@ -122,7 +122,8 @@ fn preview_wire(points: Vec<Vec3>) -> WireModel {
         line_weight_px: 1.0,
         snap_pts: vec![],
         tangent_geoms: vec![],
-        key_vertices: vec![],
+        aci: 0,
+            key_vertices: vec![],
     }
 }
 

src/modules/annotate/diameter_dim.rs

@@ -86,6 +86,7 @@ fn preview_line(a: Vec3, b: Vec3) -> WireModel {
         line_weight_px: 1.0,
         snap_pts: vec![],
         tangent_geoms: vec![],
-        key_vertices: vec![],
+        aci: 0,
+            key_vertices: vec![],
     }
 }

src/modules/annotate/dim_baseline.rs

@@ -128,6 +128,7 @@ impl CadCommand for DimBaselineCommand {
             line_weight_px: 1.0,
             snap_pts: vec![],
             tangent_geoms: vec![],
+            aci: 0,
             key_vertices: vec![],
         })
     }

src/modules/annotate/dim_continue.rs

@@ -125,6 +125,7 @@ impl CadCommand for DimContinueCommand {
             line_weight_px: 1.0,
             snap_pts: vec![],
             tangent_geoms: vec![],
+            aci: 0,
             key_vertices: vec![],
         })
     }

src/modules/annotate/leader_cmd.rs

@@ -199,7 +199,8 @@ fn preview_wire(pts: &[Vec3]) -> WireModel {
         line_weight_px: 1.0,
         snap_pts: vec![],
         tangent_geoms: vec![],
-        key_vertices: vec![],
+        aci: 0,
+            key_vertices: vec![],
     }
 }
 

src/modules/annotate/linear_dim.rs

@@ -110,7 +110,8 @@ fn preview_wire(points: Vec<Vec3>) -> WireModel {
         line_weight_px: 1.0,
         snap_pts: vec![],
         tangent_geoms: vec![],
-        key_vertices: vec![],
+        aci: 0,
+            key_vertices: vec![],
     }
 }
 

src/modules/annotate/mleader_cmd.rs

@@ -152,7 +152,8 @@ fn preview_wire(pts: &[Vec3]) -> WireModel {
         line_weight_px: 1.0,
         snap_pts: vec![],
         tangent_geoms: vec![],
-        key_vertices: vec![],
+        aci: 0,
+            key_vertices: vec![],
     }
 }
 

src/modules/annotate/radius_dim.rs

@@ -109,6 +109,7 @@ fn preview_wire(points: Vec<Vec3>) -> WireModel {
         line_weight_px: 1.0,
         snap_pts: vec![],
         tangent_geoms: vec![],
-        key_vertices: vec![],
+        aci: 0,
+            key_vertices: vec![],
     }
 }

src/modules/annotate/table_cmd.rs

@@ -130,7 +130,8 @@ impl CadCommand for TableCommand {
                 line_weight_px: 1.0,
                 snap_pts: vec![],
                 tangent_geoms: vec![],
-                key_vertices: vec![],
+                aci: 0,
+            key_vertices: vec![],
             })
         } else {
             None

src/modules/annotate/tolerance_cmd.rs

@@ -83,6 +83,7 @@ impl CadCommand for ToleranceCommand {
             line_weight_px: 1.0,
             snap_pts: vec![],
             tangent_geoms: vec![],
+            aci: 0,
             key_vertices: vec![],
         })
     }

src/modules/home/draw/attdef.rs

@@ -131,6 +131,7 @@ impl CadCommand for AttdefCommand {
             line_weight_px: 1.0,
             snap_pts: vec![],
             tangent_geoms: vec![],
+            aci: 0,
             key_vertices: vec![],
         })
     }

src/modules/home/draw/ellipse.rs

@@ -524,6 +524,7 @@ fn line_wire(from: Vec3, to: Vec3) -> WireModel {
         line_weight_px: 1.0,
         snap_pts: vec![],
         tangent_geoms: vec![],
-        key_vertices: vec![],
+        aci: 0,
+            key_vertices: vec![],
     }
 }

src/modules/home/draw/line.rs

@@ -85,6 +85,7 @@ impl CadCommand for LineCommand {
             line_weight_px: 1.0,
             snap_pts: vec![],
             tangent_geoms: vec![],
+            aci: 0,
             key_vertices: vec![],
         })
     }

src/modules/home/draw/mod.rs

@@ -8,6 +8,7 @@ pub mod line;
 pub mod mline;
 pub mod point;
 pub mod polyline;
+pub mod raster_image;
 pub mod ray;
 pub mod revcloud;
 pub mod shapes;

src/modules/home/draw/raster_image.rs

@@ -0,0 +1,123 @@
+// IMAGE / IMAGEATTACH command — place a raster image in the drawing.
+//
+// Workflow:
+//   1. File dialog opens (async, handled in update.rs).
+//   2. User picks insertion point (first click).
+//   3. User drags to pick width; height is computed from the image's aspect ratio.
+//   4. Entity is committed.
+
+use acadrust::entities::RasterImage;
+use acadrust::types::Vector3;
+use acadrust::EntityType;
+use glam::Vec3;
+
+use crate::command::{CadCommand, CmdResult};
+use crate::scene::wire_model::WireModel;
+
+pub struct ImageCommand {
+    file_path: String,
+    pixel_width: u32,
+    pixel_height: u32,
+    origin: Option<Vec3>,
+}
+
+impl ImageCommand {
+    pub fn new(file_path: String, pixel_width: u32, pixel_height: u32) -> Self {
+        Self { file_path, pixel_width, pixel_height, origin: None }
+    }
+
+    fn aspect(&self) -> f64 {
+        if self.pixel_height == 0 {
+            1.0
+        } else {
+            self.pixel_width as f64 / self.pixel_height as f64
+        }
+    }
+
+    fn make_entity(&self, origin: Vec3, width_pt: Vec3) -> EntityType {
+        let world_width = ((width_pt.x - origin.x) as f64).abs().max(0.001);
+        let world_height = world_width / self.aspect();
+
+        let ins = Vector3::new(origin.x as f64, origin.z as f64, origin.y as f64);
+
+        let mut img = RasterImage::with_size(
+            &self.file_path,
+            ins,
+            self.pixel_width as f64,
+            self.pixel_height as f64,
+            world_width,
+            world_height,
+        );
+        img.flags = acadrust::entities::ImageDisplayFlags::SHOW_IMAGE
+            | acadrust::entities::ImageDisplayFlags::USE_CLIPPING_BOUNDARY;
+        EntityType::RasterImage(img)
+    }
+}
+
+impl CadCommand for ImageCommand {
+    fn name(&self) -> &'static str {
+        "IMAGE"
+    }
+
+    fn prompt(&self) -> String {
+        if self.origin.is_none() {
+            format!("IMAGE  Specify insertion point ({}):  ", short_name(&self.file_path))
+        } else {
+            "IMAGE  Specify width (drag right):".into()
+        }
+    }
+
+    fn on_point(&mut self, pt: Vec3) -> CmdResult {
+        if let Some(origin) = self.origin {
+            let entity = self.make_entity(origin, pt);
+            CmdResult::CommitAndExit(entity)
+        } else {
+            self.origin = Some(pt);
+            CmdResult::NeedPoint
+        }
+    }
+
+    fn on_enter(&mut self) -> CmdResult {
+        // If origin is set, place with a default width of 1 unit * pixel count / 100
+        if let Some(origin) = self.origin {
+            let default_w = (self.pixel_width as f64 / 100.0).max(1.0);
+            let width_pt = Vec3::new(origin.x + default_w as f32, origin.y, origin.z);
+            let entity = self.make_entity(origin, width_pt);
+            CmdResult::CommitAndExit(entity)
+        } else {
+            CmdResult::Cancel
+        }
+    }
+
+    fn on_mouse_move(&mut self, pt: Vec3) -> Option<WireModel> {
+        let origin = self.origin?;
+        let world_width = (pt.x - origin.x).abs().max(0.001);
+        let world_height = world_width / self.aspect() as f32;
+
+        let p0 = [origin.x, origin.y, origin.z];
+        let p1 = [origin.x + world_width, origin.y, origin.z];
+        let p2 = [origin.x + world_width, origin.y + world_height, origin.z];
+        let p3 = [origin.x, origin.y + world_height, origin.z];
+
+        Some(WireModel {
+            name: "image_preview".into(),
+            points: vec![p0, p1, p2, p3, p0],
+            color: WireModel::CYAN,
+            selected: false,
+            pattern_length: 0.0,
+            pattern: [0.0; 8],
+            line_weight_px: 1.0,
+            snap_pts: vec![],
+            tangent_geoms: vec![],
+            aci: 0,
+            key_vertices: vec![],
+        })
+    }
+}
+
+fn short_name(path: &str) -> &str {
+    std::path::Path::new(path)
+        .file_name()
+        .and_then(|n| n.to_str())
+        .unwrap_or(path)
+}

src/modules/home/draw/ray.rs

@@ -83,6 +83,7 @@ impl CadCommand for RayCommand {
             line_weight_px: 1.0,
             snap_pts: vec![],
             tangent_geoms: vec![],
+            aci: 0,
             key_vertices: vec![],
         })
     }
@@ -159,6 +160,7 @@ impl CadCommand for XLineCommand {
             line_weight_px: 1.0,
             snap_pts: vec![],
             tangent_geoms: vec![],
+            aci: 0,
             key_vertices: vec![],
         })
     }

src/modules/home/draw/revcloud.rs

@@ -68,6 +68,7 @@ impl CadCommand for RevCloudCommand {
             line_weight_px: 1.0,
             snap_pts: vec![],
             tangent_geoms: vec![],
+            aci: 0,
             key_vertices: vec![],
         })
     }

src/modules/home/draw/wipeout.rs

@@ -104,7 +104,8 @@ impl CadCommand for WipeoutCommand {
                     line_weight_px: 1.0,
                     snap_pts: vec![],
                     tangent_geoms: vec![],
-                    key_vertices: vec![],
+                    aci: 0,
+            key_vertices: vec![],
                 })
             }
             WipeoutMode::Polygonal => {
@@ -123,7 +124,8 @@ impl CadCommand for WipeoutCommand {
                     line_weight_px: 1.0,
                     snap_pts: vec![],
                     tangent_geoms: vec![],
-                    key_vertices: vec![],
+                    aci: 0,
+            key_vertices: vec![],
                 })
             }
         }

src/modules/home/inquiry/area.rs

@@ -73,6 +73,7 @@ impl CadCommand for AreaCommand {
             line_weight_px: 1.0,
             snap_pts: vec![],
             tangent_geoms: vec![],
+            aci: 0,
             key_vertices: vec![],
         })
     }

src/modules/home/inquiry/dist.rs

@@ -68,6 +68,7 @@ impl CadCommand for DistCommand {
             line_weight_px: 1.0,
             snap_pts: vec![],
             tangent_geoms: vec![],
+            aci: 0,
             key_vertices: vec![],
         })
     }

src/modules/home/modify/stretch.rs

@@ -100,7 +100,8 @@ impl CadCommand for StretchCommand {
                 line_weight_px: 1.0,
                 snap_pts: vec![],
                 tangent_geoms: vec![],
-                key_vertices: vec![],
+                aci: 0,
+            key_vertices: vec![],
             })
         } else {
             None

src/modules/layout/mview.rs

@@ -95,6 +95,7 @@ impl CadCommand for MviewCommand {
             line_weight_px: 1.0,
             snap_pts: vec![],
             tangent_geoms: vec![],
+            aci: 0,
             key_vertices: vec![],
         })
     }

src/modules/view/plot_window.rs

@@ -60,6 +60,7 @@ impl CadCommand for PlotWindowCommand {
             line_weight_px: 1.0,
             snap_pts: vec![],
             tangent_geoms: vec![],
+            aci: 0,
             key_vertices: vec![],
         })
     }

src/modules/view/zoom_window.rs

@@ -66,6 +66,7 @@ impl CadCommand for ZoomWindowCommand {
             line_weight_px: 1.0,
             snap_pts: vec![],
             tangent_geoms: vec![],
+            aci: 0,
             key_vertices: vec![],
         })
     }