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fix: resize social preview to 1200x630 RGB for Teams compatibility - #71
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Teams (and most OG crawlers) require the image to match declared dimensions and reject RGBA PNGs. The previous image was 1642x838 RGBA, which caused silent unfurl failures in Teams while Signal still worked. Converted to 1200x630 RGB (standard OG image size, 1.91:1 ratio) with alpha channel composited onto white background. Signed-off-by: Artem Kovalov <artem.kovalyov@gmail.com>
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Summary
social-preview.pngfrom 1642×838 to the standard 1200×630 (1.91:1 OG ratio)Why
Teams silently fails to unfurl OG images that are RGBA or whose actual dimensions don't match the declared
og:image:width/og:image:heightmeta tags. Signal is more permissive, which is why the image worked there but not in Teams.The
og:image:widthandog:image:heightmeta tags already declare1200/630, so no config changes are needed.Test plan