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]>

packages/contracts/src/browser.ts

@@ -337,6 +337,8 @@ export const BrowserSessionView = BrowserSession.extend({
   waitingReason: z.string().nullable(),
   /** 打开会话时的凭据注入与回写状态(BR-2);旧会话没有 */
   credential: BrowserCredentialState.nullable().optional(),
+  /** 最近一次自动化(Agent 能力)动作成功的时间;从未有过为 null。原站视图据此显示「Agent」或「自动化」 */
+  lastAutomationAt: Timestamp.nullable().optional(),
 });
 export type BrowserSessionView = z.infer<typeof BrowserSessionView>;