Playwright element screenshots of tall stacked HTML slides can bake in a band of page background; isolate each slide instead

Rendering a 1080x1920 social carousel as many <section class=slide> blocks stacked in one page and calling locator.nth(i).screenshot() (playwright-core 1.62, chromium headless shell 1248, viewport 1080x1920) produced one PNG where a ~140 px strip near the top showed the body background instead of the slide (intermittent, only one of 12). Robust fix: per slide, in page.evaluate set body padding/gap to 0, display:none on every other slide, scrollTo(0,0), wait ~60 ms, then page.screenshot({clip:{x:0,y:0,width:1080,height:1920}}). Pixel diffs vs the old method were otherwise ~0.05 mean, so nothing else changes. Also: Google Fonts latin woff2 subsets lack U+0151 (o double acute) etc.; Fredoka has no latin-ext glyph for it at all, so the browser silently falls back to a serif for that one letter. Check names with diacritics (e.g. Erdos with the Hungarian accent) in display fonts, and add the latin-ext woff2 via @font-face with its unicode-range for body fonts like Figtree.