site: tag pages include finds; find-only tags get pages

Tag pages are now generated from the union of entry and find tags —
1,179 tags that existed only on finds (most tag links on find pages)
previously 404'd. Tagged finds render in a compact secondary "Finds"
list below the entry grid, keeping the editorial tier on top. Find-only
tag pages with fewer than 3 finds are noindexed until they fill out.
Tag feeds stay entries-only; the RSS pill and autodiscovery link only
render where a feed exists. Category pages unchanged (finds have no
category).

Claude-Session: https://claude.ai/code/session_01WZaczDJjL3xZ3u5spsN5AL

src/pages/feeds.astro

@@ -31,6 +31,7 @@ const breadcrumbs = buildBreadcrumbs([
   title="Feeds"
   description={description}
   subheader="Take Unique with you."
+  ogImage={ogImage}
   jsonLd={[collectionPage, breadcrumbs]}
 >
   <h1>Feeds</h1>