Two follow-ups to yesterday's merges. Both were already known; neither
depends on the open question in #1287.
1. Canvas mode pinned every decoded image for the component's lifetime.
`AuthenticatedImage` keeps a detached Image in `imageRef` so drawToCanvas
can read it. The effect cleanup nulled onload/onerror and never cleared
that ref, so the Image — and the decode behind it — stayed held by a live
JS reference. A decoded <img> in the document is evictable under memory
pressure; one held by a ref is not.
That is not academic at gallery scale. The photo grid is NOT virtualised,
so a 546-photo event mounts 546 of these and none ever unmount — nothing
was ever released. The ref is cleared and the src dropped, so the browser
can reclaim without waiting for GC.
This is NOT presented as the fix for #1287. That investigation is still
open: the reporter has since shown the backend idle during a stall and
the renderer itself unresponsive for 45s, which rules out the theories
tried so far. This is a real leak on the same path, worth fixing on its
own terms while that question is settled.
2. newsletterService no longer carries its own remote-url() stripper.
It was added because the shared sanitizeCSS "blocked" remote URLs with a
CSS comment that parsers discard. #1290 replaced that with a lexer, so
the local copy is dead weight — and two definitions of "disallowed" would
drift apart. Verified the shared function covers every case the local one
did, including the quoted-paren and CSS-escape forms found in review.
Three tests on the release path, two of which fail without the fix:
unmount clears the ref and drops the src, the blob URL is revoked, and a
src change releases the previous image rather than accumulating one
pinned decode per photo a recycled tile has shown.
Paul Nothaft
be8d79e9c4