Fix zero-area artboard

editor/src/messages/tool/tool_messages/artboard_tool.rs

@@ -236,7 +236,7 @@ impl Fsm for ArtboardToolFsmState {
 								ArtboardMessage::AddArtboard {
 									id: Some(id),
 									position: (0., 0.),
-									size: (0., 0.),
+									size: (1., 1.),
 								}
 								.into(),
 							);

graphene/src/document.rs

@@ -872,7 +872,13 @@ impl Document {
 				Some([vec![DocumentChanged], update_thumbnails_upstream(&path)].concat())
 			}
 			Operation::SetLayerTransform { path, transform } => {
-				let transform = DAffine2::from_cols_array(&transform);
+				let mut transform = DAffine2::from_cols_array(&transform);
+				if transform.x_axis[0] == 0. {
+					transform.x_axis[0] = -1.
+				}
+				if transform.y_axis[1] == 0. {
+					transform.y_axis[1] = -1.
+				}
 				let layer = self.layer_mut(&path)?;
 				layer.transform = transform;
 				self.mark_as_dirty(&path)?;