The wizard starts with `importFolder` null for lack of reading, which the
Import page took for "no folder": the "No import folder" empty state
flashed before the stored folder came back (#384).
`importFolderLoaded` is set in the `finally` of the mount read, after the
first scan, so neither variant of the empty state flashes, and it is kept
by RESET, which rebuilds from the initial state while the mount read
never runs again.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
