Pre-loading relied on the page being controlled by the service worker, so
its requests would pass through it and be saved. A page loaded with a hard
reload (Ctrl+Shift+R) never is: pre-loading then waited, gave up silently,
and nothing new was saved — the app still could not start offline, and
Settings kept showing the old sync time.
The page now asks the worker by message to fetch and save each URL, which
works however the page was loaded. Sign-out reaches the worker through its
registration for the same reason. Thread URLs come from shared helpers in
api.ts, so pre-loading saves exactly what the app asks for.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
lukasandClaude Opus 5.5
01bfbb37d4