OG unfurl test — tall share-card images

Each page serves the same mock Phantom share card at a different aspect ratio via og:image. The image itself draws a dashed box marking the 1.91:1 safe area, so wherever you paste the link you can see immediately whether the unfurler cropped to that box or rendered the full card.

• Control — 1200×630 (1.91:1)Standard OG size. Baseline.
• Square — 1200×1200 (1:1)Roughly the in-app card at typical widths.
• Tall — 1200×1600 (4:3 portrait)Share card with a sparkline.
• Very tall — 1200×2100Worst case.
• Tall 1200×1600, twitter:card=summarySmall-square variant instead of large image.