fix(sites): normalize HHClub RSS items, complete detail page parsing (HH-2)

- RSS: split NexusPHP "[category]name[subtitle][size][uploader]" titles in the
  site adapter layer (category id/name/media type, clean title, subtitle,
  size); snapshot fields win on merge; lazily renormalize old RSS rows and
  re-emit release.observed; unknown list fields show an em dash
- Detail: HHClub section layout (douban info block as description,
  screenshots section, IMDb/TMDB from MediaInfo lines, upload time field,
  on-demand viewfilelist.php once); site CDN screenshots get a Referer
- Site request count now includes site-bound RSS fetches
- Origin view shows "自动化" when idle and "Agent" only after recent
  automation actions (lastAutomationAt); agent step titles no longer get
  squeezed to a sliver by long notes

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/web/app/components/search/release-results.tsx

@@ -390,9 +390,9 @@ function ReleaseRow({ r, onDownload }: { r: SearchRelease; onDownload: () => voi
         <span>{r.sizeBytes === null ? "大小未知" : formatBytes(r.sizeBytes, 1)}</span>
         <span className="inline-flex items-center gap-0.5" title="做种 / 下载">
           <ArrowUp className="h-3 w-3" />
-          {r.seeders ?? "?"}
+          {r.seeders ?? "—"}
           <ArrowDown className="ml-1 h-3 w-3" />
-          {r.leechers ?? "?"}
+          {r.leechers ?? "—"}
         </span>
         <span title="站点发布时间">发布 {relTime(r.uploadedAt)}</span>
         {tech ? <span className="break-all">{tech}</span> : null}