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/VideoCard.tsx

@@ -17,7 +17,13 @@ import { navItemAttrs } from "../lib/listNav";
 import clsx from "clsx";
 import type { Video, VideoStatus } from "../lib/api";
 import { FEED_VIEW_SPEC, type FeedView } from "../lib/feedView";
-import { formatDate, formatDuration, formatNumber, formatViews, relativeTime } from "../lib/format";
+import {
+  formatDate,
+  formatDuration,
+  formatNumber,
+  formatCompact,
+  relativeTime,
+} from "../lib/format";
 import { isPlainLeftClick } from "../lib/nav";
 import { endsTextSelection } from "../lib/textSelection";
 import ChannelNameLink from "./ChannelNameLink";
@@ -391,6 +397,7 @@ function VideoCard({
   shelf?: boolean;
 }) {
   const { t, i18n } = useTranslation();
+  const lang = i18n.language;
   const { openChannel } = useNavigationActions();
   const spec = FEED_VIEW_SPEC[view];
   const watched = video.status === "watched";
@@ -405,14 +412,14 @@ function VideoCard({
   // on every line and the tooltip carries the figure regardless.
   const viewsCell = (withWord: boolean) =>
     video.view_count != null && (
-      <span title={`${formatNumber(video.view_count)} ${t("card.views")}`}>
-        {formatViews(video.view_count)}
+      <span title={`${formatNumber(video.view_count, lang)} ${t("card.views")}`}>
+        {formatCompact(video.view_count, lang)}
         {withWord && ` ${t("card.views")}`}
       </span>
     );
   const published = (
     <>
-      {relativeTime(video.published_at)}
+      {relativeTime(video.published_at, lang)}
       {video.published_at && (
         <>
           {" · "}