ScrollArea

// ── ScrollArea ──
pub fn buildScrollArea(scope: *ui.Scope, cx: *ui.Cx) anyerror!*ui.Node {
    const a = cx.allocator;
    const sa = try W.mountScrollArea(.{ .width = 320, .height = 320, .direction = .vertical }, scope, cx);
    var i: usize = 0;
    while (i < 40) : (i += 1) {
        var buf: [32]u8 = undefined;
        const txt = try std.fmt.bufPrint(&buf, "Scrollable line {d}", .{i});
        try sa.content.appendChild(a, try ui.text(cx, txt, .{ .font_size = 13, .color = light.color.fg_primary }));
    }
    return sa.container;
}