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/Sidebar.tsx

@@ -22,6 +22,7 @@ import { useFeedFilters, useFeedFiltersActions } from "./feedFiltersContext";
 import { useChannelsActions } from "./channelsContext";
 import { useMe } from "../lib/useMe";
 import { useTags } from "../lib/useTags";
+import { compareText } from "../lib/collate";
 
 // Filter ids; display labels resolved at render time via t("sidebar.sort.<id>") etc.
 const DATE_PRESETS: { days: number; key: string }[] = [
@@ -47,7 +48,8 @@ export default function Sidebar({
   collapsed: boolean;
   onToggleCollapse: () => void;
 }) {
-  const { t } = useTranslation();
+  const { t, i18n } = useTranslation();
+  const lang = i18n.language;
   const isDemo = useMe().is_demo;
   const { openModal } = useSavedViews();
   const filters = useFeedFilters();
@@ -76,7 +78,9 @@ export default function Sidebar({
     const shown = facetsReady
       ? list.filter((tg) => chipCount(tg) > 0 || filters.tags.includes(tg.id))
       : list;
-    return [...shown].sort((a, b) => chipCount(b) - chipCount(a) || a.name.localeCompare(b.name));
+    return [...shown].sort(
+      (a, b) => chipCount(b) - chipCount(a) || compareText(a.name, b.name, lang),
+    );
   };
 
   const languages = tags.filter((t) => t.category === "language");