fix(i18n): numbers, units, dates and order in the UI language, and after a switch (E30 S3)

Every locale formatter takes the language as an argument. Under the React
Compiler a formatter that read the i18n singleton was memoized on its other
arguments, so a card kept "2 hr 4 min" after a switch to Hungarian; plexLang()
had the same flaw and left Plex queries in the old language. Components now
take the language from useTranslation, and the signature makes forgetting it
a type error.

- ratings, file sizes, stream stats: the language's decimal mark ("8,3")
- view and subscriber counts compact in the language ("1,2 E")
- seconds as the language's unit ("6 mp") in the sliders and the stats
- a person's birth and death dates as dates, not ISO strings
- A-Z lists by the shown name in the language's alphabet (compareText),
  the tag catalog re-sorted by its translated names
- lint local/locale-format (was date-format) also refuses Intl.NumberFormat
  outside lib/format.ts, localeCompare, and a component reading the language
  off the i18n singleton

frontend/src/components/PlexPlaylistView.tsx

@@ -406,7 +406,8 @@ export default function PlexPlaylistView({
   /** A title's media-info page, from its menu's "Details". */
   onInfoCard?: (card: PlexCard) => void;
 }) {
-  const { t } = useTranslation();
+  const { t, i18n } = useTranslation();
+  const lang = i18n.language;
   const qc = useQueryClient();
   const confirm = useConfirm();
   const [renaming, setRenaming] = useState(false);
@@ -755,7 +756,7 @@ export default function PlexPlaylistView({
             {items.length > 0 && (
               <div className="mt-0.5 text-sm text-muted">
                 {t("plex.browse.items", { count: items.length })}
-                {totalSeconds > 0 && ` · ${formatRuntime(totalSeconds)}`}
+                {totalSeconds > 0 && ` · ${formatRuntime(totalSeconds, lang)}`}
               </div>
             )}
           </div>