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/VideoInfoCard.tsx

@@ -3,7 +3,7 @@ import { useTranslation } from "react-i18next";
 import { useQuery } from "@tanstack/react-query";
 import { qk } from "../lib/queryKeys";
 import { api, type Video } from "../lib/api";
-import { formatDate, formatDuration, formatViews } from "../lib/format";
+import { formatDate, formatDuration, formatCompact } from "../lib/format";
 import { linkify } from "../lib/linkify";
 import Avatar from "./ui/Avatar";
 import { PopoverSurface } from "./ui/AnchoredPopover";
@@ -34,6 +34,7 @@ export default function VideoDetailsAt({
   onClose: () => void;
 }) {
   const { t, i18n } = useTranslation();
+  const lang = i18n.language;
   const pop = useAnchoredPopover({
     open: true,
     onOpenChange: (next) => {
@@ -72,7 +73,7 @@ export default function VideoDetailsAt({
 
   const description = detail?.description?.trim();
   const metaBits = [
-    video.view_count != null ? `${formatViews(video.view_count)} ${t("card.views")}` : null,
+    video.view_count != null ? `${formatCompact(video.view_count, lang)} ${t("card.views")}` : null,
     video.duration_seconds != null ? formatDuration(video.duration_seconds) : null,
     video.published_at ? formatDate(video.published_at, i18n.language) : null,
   ].filter(Boolean);