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/PlaylistsRail.tsx

@@ -4,6 +4,7 @@ import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 import { qk } from "../lib/queryKeys";
 import { ListVideo, Pin, Plus, RefreshCw, Youtube } from "lucide-react";
 import { api, type Playlist } from "../lib/api";
+import { compareText } from "../lib/collate";
 import { formatRuntime } from "../lib/format";
 import { notify } from "../lib/notifications";
 import { notifyYouTubeActionError } from "../lib/youtubeErrors";
@@ -59,7 +60,8 @@ export default function PlaylistsRail({
   // box and the Playlists detail pane); this rail owns the list query + its own controls.
   const { search, selectedId } = usePlaylists();
   const { setSelectedId } = usePlaylistsActions();
-  const { t } = useTranslation();
+  const { t, i18n } = useTranslation();
+  const lang = i18n.language;
   const qc = useQueryClient();
   const [plSort, setPlSort] = useState<PlSort>(() => readAccountMerged(LS.plSort, PL_SORT_DEFAULT));
   const plSortOptions: SortOption[] = [
@@ -123,7 +125,7 @@ export default function PlaylistsRail({
       if (plSort.dirtyFirst && a.dirty !== b.dirty) return a.dirty ? -1 : 1;
       switch (plSort.key) {
         case "name":
-          return sign * plName(a).localeCompare(plName(b));
+          return sign * compareText(plName(a), plName(b), lang);
         case "count":
           return sign * (a.item_count - b.item_count);
         case "duration":
@@ -134,7 +136,7 @@ export default function PlaylistsRail({
           return 0;
       }
     });
-  }, [playlists, plSort, plName]);
+  }, [playlists, plSort, plName, lang]);
 
   const q = search.trim().toLowerCase();
   const visiblePlaylists = useMemo(
@@ -366,7 +368,7 @@ export default function PlaylistsRail({
                       <div className="text-2xs text-muted">
                         {t("playlists.itemCount", { count: pl.item_count })}
                         {pl.total_duration_seconds > 0 &&
-                          ` · ${formatRuntime(pl.total_duration_seconds)}`}
+                          ` · ${formatRuntime(pl.total_duration_seconds, lang)}`}
                       </div>
                     </div>
                   </Pressable>