PB_URL falls back through PB_URL → NEXT_PUBLIC_PB_URL → localhost so
internal Docker hostname is used server-side without leaking into the
client bundle. cache: force-cache replaced with next: { tags, revalidate }
for ISR tag-based invalidation.
Remove slug field from PageContentRecord (intro/bio collections have none).
Remove number field from SectionRecord (not stored in PocketBase); derive
zero-padded display number from the order field at render time.
Ilia Mashkov