`?page=about` instead of `?page=2`. A URL that names the page can be read, sent to somebody, and still
means the right thing after a database is restored from a dump with different ids — which happened
once in this project already, earlier today.
Home needs a word, because its slug is empty by design: that is the check constraint, and it is what
makes `/` fall out of joining a slug to the root. An empty string is no use in a query parameter that
has to name a page unambiguously, so the admin says `home` — and the site's API now REFUSES that slug,
which is what makes the mapping total in both directions rather than merely usual.
One reserved address costs nothing. Anybody who wanted /home wanted the front page, which they have.
One place maps a page to its URL value and back — pageParam and pageFromParam — so the nav, the detail
panel and the builder cannot disagree about what `?page=` means.
`record` is deleted on every navigation. It belonged to the per-page record panels, which are
unreachable now; nothing reads it, so it was not a bug, but every URL anybody copied carried a
parameter naming a row in a section that no longer exists.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>