Advance WebGPU volume and bounded workflows

tools/web/generate-mask-fixture.py

@@ -29,6 +29,19 @@ def main(output_path):
         point.weight = weight
         point.select = selected
 
+    editable_layer = mask.layers.new(name="WebEditableLayer")
+    editable_spline = editable_layer.splines.new()
+    editable_spline.points.add(1)
+    editable_values = [
+        ((0.2, 0.2), (0.1, 0.2), (0.35, 0.4)),
+        ((0.8, 0.2), (0.65, 0.4), (0.9, 0.2)),
+    ]
+    for point, (co, left, right) in zip(editable_spline.points, editable_values):
+        point.co = co
+        point.handle_left = left
+        point.handle_right = right
+        point.handle_type = "FREE"
+
     path = pathlib.Path(output_path).resolve()
     path.parent.mkdir(parents=True, exist_ok=True)
     bpy.ops.wm.save_as_mainfile(filepath=str(path), compress=False)