updateFingerprintCache (and the fingerprint getter) emitted "fingerprint"
unconditionally on every load. The For You feed subscribes to that event and
re-runs refreshFeed -> loadLatest -> updateFingerprintCache -> emit, so once the
For You feed was active the app entered an infinite loop: a full feed rebuild
plus a watch-history reload (with extension decrypts) every ~400ms. That pegged
the CPU (fans maxing) and starved every other load — videos, hashtags, subs,
DMs and watch history all failed to appear.
Emit "fingerprint" only when the fingerprint actually changes. The first real
resolution emits once (triggering a single refresh); the follow-up load produces
the same fingerprint and emits nothing, so the loop settles immediately.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
