Extend the app-storage generator to record every bind mount's size and
in-container path, grouped into a per-app folder list. The "Storage by
app" rows are now expandable: click an app to see where its space goes
(e.g. /var/lib/mysql vs /data), with external-drive folders flagged.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>