Library warm-up and the per-item fallback fat-load now run through a
shared asyncMap helper (counting semaphore, 8 in flight): the CDN
presync's hand-rolled 6-worker pool is replaced and the previously
fully-serial listItems+getItemBody fallback is parallelized (order
preserved).
The load-screen sync line stops flashing: progress reports on lib
COMPLETION only (no "current lib" — with 8 in flight there isn't one),
the label is a fixed prefix ("Syncing symbol libraries — ") and the
counter is space-padded to the total's width in font-mono +
whitespace-pre, so 2→3 digit growth doesn't shift the text. Same
padding for the fat-load overlay's "x / y libraries" line.
Verified in demo mode against the live R2 CDN: 7-8 overlapping
manifest/bundle requests, 222 cold symbol libs in a few seconds.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JgThWXtdvrYLK47EDFoGdq
157d60f6b8