feat(sites): on-demand site detail page content (INT-2)

- SiteReleaseDetail.page: description, MediaInfo/BDInfo, screenshots,
  IMDb / Douban / TMDB ids, file list, tags, uploader, plus a parse probe
  (labels found) for layout-change diagnosis. Generic NexusPHP rules
  (field label -> next sibling) starting from the MovieClaw detail
  selectors; site overrides under umt.detail.page (HHClub: div labels).
  M-Team builds the same structure from descr BBCode + mediainfo.
- Fetched only on demand (drawer open without cache, "复核详情",
  release.inspect); content in kv_cache region site.detail for the
  site detail cache period (>= 24 h); within the window the site is not
  requested again. External ids persist in source_release.raw._detail,
  which list snapshots do not overwrite.
- Screenshots only as proxy paths /api/v1/img/site-detail/{rid}/{i}:
  public-address check on every hop, no site credentials, magic-byte
  image check, 8 MB cap. Poster proxy shares the same helper.
- Identity: site ids count as explicit-id evidence; when TMDB is
  queried, a TMDB id goes straight to details and an IMDb id to
  /find (no title search on a hit). Douban only for local recall.
- Release drawer "站点详情页" section; fixtures and tests for HHClub div
  layout, rowhead layout, BBCode, cache/proxy/identity end to end.

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

packages/testkit/src/tmdb/mock-tmdb.ts

@@ -19,7 +19,7 @@ const notFound: MockReply = {
   json: { success: false, status_code: 34, status_message: "The resource you requested could not be found." },
 };
 
-/** mock TMDB v3:/3/search/{movie,tv}、/3/{movie,tv}/:id(append_to_response)、/3/tv/:id/season/:n */
+/** mock TMDB v3:/3/search/{movie,tv}、/3/find/:imdbId、/3/{movie,tv}/:id(append_to_response)、/3/tv/:id/season/:n */
 export async function createMockTmdb(opts: MockTmdbOptions = {}): Promise<MockTmdb> {
   const fx = opts.fixtures ?? TMDB_FIXTURES;
   const apiKey = opts.apiKey ?? "test-tmdb-key";
@@ -84,6 +84,23 @@ export async function createMockTmdb(opts: MockTmdbOptions = {}): Promise<MockTm
           return { json: { page: 1, results, total_pages: 1, total_results: results.length } };
         },
       ],
+      [
+        /^\/3\/find\/(tt\d+)$/,
+        (m, q) => {
+          if (q.external_source !== "imdb_id") return { json: { movie_results: [], tv_results: [] } };
+          const hit = fx.filter((f) => f.external_ids.imdb_id === m[1]);
+          return {
+            json: {
+              movie_results: hit
+                .filter((f) => f.type === "movie")
+                .map((f) => ({ ...brief(f, q.language), media_type: "movie" })),
+              tv_results: hit
+                .filter((f) => f.type === "tv")
+                .map((f) => ({ ...brief(f, q.language), media_type: "tv" })),
+            },
+          };
+        },
+      ],
       [
         /^\/3\/tv\/(\d+)\/season\/(\d+)$/,
         (m, q) => {