Public /blog: the handler param was named `page`, which is a reserved
route token in Razor Pages and never binds — so every page silently
showed the same first 10 posts. Renamed the query param to `pg`
([FromQuery(Name="pg")]) and updated the pagination links to match.
Admin: the posts table had no pagination and dumped all rows at once.
Added client-side pagination (10/page) with a prev/next + numbered bar
over the already-loaded posts array.
Verified: public page1=10/page2=4 with zero overlap; admin shows
‹ 1 2 › with correct row counts and active state per page.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>