Bunny/cross-origin downloads are fetched into a blob before saving, which
on large files or slow connections looked stuck (spinner only). Stream the
body through a counting transform and show real byte progress in a toast:
per-file percent for single downloads and file N/M + percent for bulk.
- Progress is measured from Content-Length + received bytes (not estimated).
- The blob is assembled by the browser from the stream (can be disk-backed),
so we don't accumulate chunks in the JS heap.
- Only the blob path shows a toast; same-origin (R2/S3/MinIO) and the >10 GB
fallback use the browser's native download UI.
Downloads now save as "<video title> <version label>" (or "<title> vN"
when no label), with the real extension derived from the file's content
type, instead of the CDN's generic "original" name.
- Bunny (cross-origin CDN redirect) files are fetched and saved as a named
blob, but only up to 10 GB; larger files fall back to a plain navigation
so the browser streams to disk without buffering in memory.
- R2 / S3 / MinIO uploads are same-origin (/api/upload/video/...), so the
download attribute names them correctly at any size, no buffering.
- Applies to both single-video and bulk/project downloads; bulk downloads
run sequentially so at most one file is buffered at a time.
- Shared helper in lib/client/download-file.ts.
yusufipk