Canvases in the 3D pass: textured quads depth-tested against the model (the model hides them, decals sit on their face), with the section cut applied; Canvas panel (opened after placing a canvas or by Edit Canvas in INSERT): opacity slider, width, angle, flip, visibility, delete

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL

crates/engine/src/cmd/sketch_canvas.rs

@@ -17,7 +17,7 @@ pub static COMMANDS: &[CommandSpec] = &[
         .at("SKETCH", "INSERT")
         .icon("decal")
         .params("path | data; face: [x,y,z] on a planar face (the image is centred there); width?: mm; angle?: deg; opacity?: (default 1)"),
-    CommandSpec::new("canvas.edit", "Edit Canvas", edit_canvas).params("canvas: id or name; center?, width?, angle?: deg, opacity?, flip?, visible?, name?"),
+    CommandSpec::new("canvas.edit", "Edit Canvas", edit_canvas).at("SKETCH", "INSERT").icon("canvas").params("canvas: id or name; center?, width?, angle?: deg, opacity?, flip?, visible?, name?"),
     CommandSpec::new("canvas.calibrate", "Calibrate Canvas", calibrate)
         .params("canvas: id or name; a, b: two points on the canvas plane [x,y]; distance: their true distance (mm): scales the image about a"),
     CommandSpec::new("canvas.delete", "Delete Canvas", delete_canvas).params("canvas: id or name"),