8c693b582d
* fix: prevent media upload OOM on Workers via client thumbnails + server safety net Large image uploads (5MB+) crash Cloudflare Workers (128MB limit) because generatePlaceholder() decodes entire images to raw RGBA pixels. A 4000x3000 JPEG becomes ~48MB RGBA, exceeding the isolate memory budget. Two-layer fix: - Client-side: browser generates a 64px canvas thumbnail for oversized images and sends it alongside the upload. Server generates blurhash from the thumbnail (~16KB RGBA) instead of decoding the full image. - Server-side: reads dimensions from image headers via image-size and skips placeholder generation when estimated decoded size exceeds 32MB. This covers API/CLI uploads that don't provide thumbnails. * chore: add changeset for media upload OOM fix * fix: clamp upload thumbnail to 64x64 box for extreme aspect ratios Naive sizing (thumbW=64, thumbH=(h/w)*64) could produce an enormous canvas for very tall or very wide images — e.g. a 100x840000 image would allocate a 64x537600 canvas client-side, reintroducing the memory blowup this feature exists to prevent. Extract computeThumbnailSize() that fits the image within a 64x64 box by scaling against max(width, height), wrap canvas allocation and drawImage in try/catch with a no-thumbnail fallback, and add unit tests covering extreme aspect ratios. --------- Co-authored-by: Matt Kane <mkane@cloudflare.com>
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