test: change old test to work with new grapheme split mechanism

e2e/preview-text.test.ts

@@ -8,9 +8,9 @@ test.describe('preview text', () => {
         await comparison.pickPair('Inter', 'Roboto');
         await comparison.setPreviewText('Sphinx');
 
-        // Each grapheme renders as a `.char-wrap` cell in the slider once
+        // Window chars render as `.char-wrap` cells for crossfade.
-        // both fonts are loaded. Six glyphs → six cells.
+        // With WINDOW_SIZE=5, "Sphinx" (6 chars) fits 5 in the window.
-        await expect(comparison.slider.locator('.char-wrap')).toHaveCount(6);
+        await expect(comparison.slider.locator('.char-wrap')).toHaveCount(5);
     });
 
     test('preserves the typed value in the input', async ({ comparison }) => {