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/IssueComposer.tsx

@@ -114,6 +114,7 @@ function ComposerBody({
   total: number;
 }) {
   const { t, i18n } = useTranslation();
+  const lang = i18n.language;
   const qc = useQueryClient();
   const pageName = (page: string) => {
     const def = moduleDef(page as Page);
@@ -304,8 +305,8 @@ function ComposerBody({
     <div ref={root} className="flex flex-col gap-4">
       <p className="text-sm text-muted">
         {t("recorder.composer.meta", {
-          start: formatDateTimeSec(started.toISOString()),
-          minutes: formatUnit(minutes, "minute"),
+          start: formatDateTimeSec(started.toISOString(), lang),
+          minutes: formatUnit(minutes, "minute", lang),
           level: t(`settings.diagnostics.levels.${session.level}`),
         })}
       </p>
@@ -607,7 +608,8 @@ function Attachments({
   onReview: (source: Source) => void;
   reviewed: MutableRefObject<Source | null>;
 }) {
-  const { t } = useTranslation();
+  const { t, i18n } = useTranslation();
+  const lang = i18n.language;
   const qc = useQueryClient();
   const shots = shotsQ.data?.items ?? [];
   // A removed screenshot's ✕ goes with it: the focus moves to the file picker, which stays.
@@ -685,7 +687,7 @@ function Attachments({
           />
           <div className="flex min-w-0 flex-1 flex-col">
             <span className="text-sm">{t("recorder.composer.screenshot", { n: i + 1 })}</span>
-            <span className="text-xs text-muted tabular-nums">{formatBytes(shot.size)}</span>
+            <span className="text-xs text-muted tabular-nums">{formatBytes(shot.size, lang)}</span>
           </div>
           {!readOnly && (
             <IconButton