M2: doc comments for the padding diff's functions

crates/engine/src/cmd/layout.rs

@@ -149,6 +149,7 @@ mod tests {
         assert!(s.execute("node.set", &json!({"id": b, "props": {"absolute": "maybe"}})).is_err());
     }
 
+    /// Each side key writes its own padding slot and leaves the other three alone.
     #[test]
     fn each_side_padding_sets_its_side_alone() {
         let mut s = Session::new();

crates/ui-egui/src/layout_panel.rs

@@ -401,6 +401,8 @@ fn alignment(app: &mut FigApp, ui: &mut Ui, ids: &[NodeId], l: &AutoLayout) {
     }
 }
 
+/// The Spacing row: gap fields, then the H/V padding pair (or the 2x2 per-side
+/// grid while the individual-padding toggle is open).
 fn spacing(app: &mut FigApp, ui: &mut Ui, ids: &[NodeId], l: &AutoLayout) {
     let col = widgets::col_width(ui.available_width());
     let [pt, pr, pb, pl] = l.padding;

crates/ui-egui/src/padding_individual_tests.rs

@@ -23,16 +23,19 @@ fn scene() -> (Ui, NodeId) {
     (Ui::new(s), f)
 }
 
+/// The frame's padding as `[top, right, bottom, left]`.
 fn padding(u: &Ui, f: NodeId) -> [f64; 4] {
     u.app.session.doc().unwrap().node(f).unwrap().layout.clone().unwrap().padding
 }
 
+/// A full press-and-release at `p`, then settling one frame.
 fn click(u: &mut Ui, p: Pos2) {
     u.button(p, true);
     u.button(p, false);
     u.frame(vec![]);
 }
 
+/// A press-and-release of Enter, committing the focused number field.
 fn enter(u: &mut Ui) {
     u.frame(vec![
         Event::Key { key: Key::Enter, physical_key: None, pressed: true, repeat: false, modifiers: Modifiers::NONE },
@@ -51,6 +54,8 @@ fn named_button(u: &mut Ui, label: &str) -> Pos2 {
     pos2(((b.x0 + b.x1) / 2.0) as f32, ((b.y0 + b.y1) / 2.0) as f32)
 }
 
+/// The side fields stay hidden until the toggle opens, then typing in one sets
+/// that side alone in a single undo step.
 #[test]
 fn side_fields_show_only_once_the_toggle_opens_and_set_one_side() {
     let (mut u, f) = scene();