The page width from .remanso.json was only applied after an async
PouchDB + network fetch, so notes briefly rendered at the default
500px before snapping to the configured value. Persist pageWidth
alongside the existing font cache (key renamed to remanso:layout:*),
so it is read synchronously during setUserRepo and applied before
the first render. Also always reset --note-width with a default
fallback to prevent stale values leaking across repo navigation.
Allows repo owners to configure note column width via `"pageWidth": "700px"` in .remanso.json. Applies the value to the --note-width CSS variable and invalidates the cached width so resize/overlay hooks pick it up.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
