fix(fig): preserve implicit fixed text sizing

CHANGELOG.md

@@ -73,6 +73,8 @@
 
 ### Fixed
 
+- Preserve implicit fixed-size text inside imported Figma auto-layout frames across save and reload.
+
 - Preserve imported Figma divider-line geometry during auto-layout recomputation, preventing half-pixel shifts on save and reload.
 
 - Make published package export conditions resolve to files included in npm tarballs.

packages/fig/src/node-change/serialize.ts

@@ -225,7 +225,10 @@ function serializeTextProps(
     nc.fontVariations = node.fontVariations.map(fontVariationToKiwi)
   }
   const autoResize = resolveTextAutoResize(node, graph)
-  nc.textAutoResize = autoResize
+  const rawNodeFields = effectiveFigmaRawNodeFields(node)
+  if (!node.source.id || autoResize !== 'NONE' || 'textAutoResize' in rawNodeFields) {
+    nc.textAutoResize = autoResize
+  }
   nc.textAlignHorizontal = node.textAlignHorizontal
   nc.textAlignVertical = node.textAlignVertical
   nc.textUserLayoutVersion = 4

tests/engine/io/fig/export/text.test.ts

@@ -271,6 +271,32 @@ describe('text node export', () => {
     expect(textNc.stackChildAlignSelf).toBeUndefined()
   })
 
+  test('omits implicit fixed text sizing for imported auto-layout text', async () => {
+    await initCodec()
+    const graph = new SceneGraph()
+    const page = graph.getPages()[0]
+    const frame = graph.createNode('FRAME', page.id, { layoutMode: 'VERTICAL' })
+    const text = graph.createNode('TEXT', frame.id, {
+      text: 'Supporting text',
+      textAutoResize: 'NONE',
+      source: {
+        ...frame.source,
+        format: 'fig',
+        id: '1:2',
+        fig: {
+          ...frame.source.fig,
+          rawNodeFields: {}
+        }
+      }
+    })
+
+    const exported = await exportFigFile(graph)
+    const parsed = await parseFigFile(exported.buffer as ArrayBuffer)
+    const restored = parsed.getAllNodes().find((node) => node.name === text.name)
+
+    expect(restored?.textAutoResize).toBe('NONE')
+  })
+
   test('style runs produce multiple fontMetaData entries', async () => {
     await initCodec()