feat(i18n): the server's closed English vocabularies named in the reader's language (E30 S2)

- lib/vocab + the `vocab` locale area: TMDB crew jobs and departments, auto-tags (D1 A: the data
  stays English, the catalog is named at its one source, useTags), built-in download profiles,
  YouTube topics; held key-for-key to the backend's own lists by backendIds.contract.
- Countries by ISO code: TMDB parse stores {code, name}; rows stored before are coded from TMDB's
  own country list in one request (run_enrich); Intl names them, historic codes (YU, SU, XI…)
  from the catalog.
- Player tracks named from the language tag, forced/SDH flags and codec tail, not Plex's
  server-language displayTitle; no invented "Audio N" on the server.
- Download lifecycle notices (shared / expiring / expired / evicted) named from data; the share
  notice carries the title.
- Scheduler: the job result rides along as data and is named per key (dashboard + run notice).
- Invite status named; a render crash's notice no longer shows the engine's English message.
- Fix: YouTube links …/wiki/Humour, the tagger looked for "Humor" — Comedy never came from a topic.

frontend/src/components/PlexInfo.tsx

@@ -28,6 +28,7 @@ import { PlexMenu } from "./PlexMenu";
 import { useContextMenu } from "./ui/useContextMenu";
 import { usePlexCardActions } from "./usePlexCardActions";
 import { toggleWatchState } from "../lib/plexWatch";
+import { regionName, vocab } from "../lib/vocab";
 
 // The rich "media info" surface for a Plex item — poster/art, IMDb score + link, content rating,
 // genres, director, cast (with photos), summary. Reused in TWO places: a full-page view opened from
@@ -233,7 +234,9 @@ function FactsPanel({
     rows.push({
       key: "countries",
       label: t("plex.info.facts.countries"),
-      node: tmdb.production_countries.join(", "),
+      node: tmdb.production_countries
+        .map((c) => regionName(t, c.code, i18n.language, c.name))
+        .join(", "),
     });
   if (rows.length === 0) return null;
   return (
@@ -309,7 +312,7 @@ function CrewPanel({
             ) : (
               <div className="truncate text-sm font-medium">{c.name}</div>
             )}
-            <div className="truncate text-2xs text-muted">{c.job}</div>
+            <div className="truncate text-2xs text-muted">{vocab(t, "crewJob", c.job)}</div>
           </div>
         ))}
       </div>