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/NotificationsPanel.tsx

@@ -507,6 +507,7 @@ function NotificationRow({
   onOpenScheduler: () => void;
   onOpenDownloads: () => void;
 }) {
+  const lang = useTranslation().i18n.language;
   // The maintenance producer ships the affected videos in `data.videos`; list a few titles.
   const videos: { id: string; title: string | null }[] = Array.isArray(n.data?.videos)
     ? n.data!.videos
@@ -535,7 +536,7 @@ function NotificationRow({
       job,
     });
     const result = d.result ?? parseSummary(d.summary);
-    body = result ? jobResultText(t, result) : d.summary || n.body;
+    body = result ? jobResultText(t, result, lang) : d.summary || n.body;
   } else if (isEmailUndelivered) {
     // Email is fail-soft: a drop leaves no error anywhere else, so this notice IS the trace. Name
     // the message that was lost, since that is what tells the operator what their users didn't get.