feat(ui): let swapDimensions work on nodes without a preset widget

- Treat a missing preset widget like preset value 'custom' in swapDimensions
- Keep every preset access behind the custom check
- Add a test that swaps width and height directly on a preset-less node

tests/js/dimensions.test.mjs

@@ -58,3 +58,14 @@ test('a throwing or recursive preset callback does not leave swapping locked', (
     swapDimensions(node, app);
     assert.deepEqual(node.widgets.map(widget => widget.value), ['640×960', 640, 960]);
 });
+
+test('nodes without a preset widget swap width and height directly', () => {
+    const calls = [];
+    const node = { widgets: [
+        { name: 'width', value: 1344, callback(value) { calls.push(['width', value]); } },
+        { name: 'height', value: 768, callback(value) { calls.push(['height', value]); } },
+    ], graph: { setDirtyCanvas() { calls.push(['dirty']); } } };
+    swapDimensions(node, app);
+    assert.deepEqual(node.widgets.map(widget => widget.value), [768, 1344]);
+    assert.deepEqual(calls, [['width', 768], ['height', 1344], ['dirty']]);
+});

web/ui/dimensions.js

@@ -38,8 +38,8 @@ export function bindDimensionPresets(node, app) {
 
 export function swapDimensions(node, app) {
     const [preset, width, height] = widgets(node);
-    if (!preset || !width || !height || swapping.has(node)) return;
-    const custom = preset.value === 'custom';
+    if (!width || !height || swapping.has(node)) return;
+    const custom = !preset || preset.value === 'custom';
     const dimensions = custom ? [width.value, height.value] : dimensionsFromPreset(preset.value);
     if (!dimensions) return;
     const [w, h] = dimensions;