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/useChannelActions.tsx

@@ -5,6 +5,7 @@ import { qk } from "../lib/queryKeys";
 import { invalidateSubscription } from "../lib/subscriptionCache";
 import { api, type ManagedChannel, type Tag } from "../lib/api";
 import { priorityChoices } from "../lib/channelOrder";
+import { compareText } from "../lib/collate";
 import { channelYouTubeUrl } from "../lib/format";
 import { notify } from "../lib/notifications";
 import { notifyYouTubeActionError } from "../lib/youtubeErrors";
@@ -40,7 +41,8 @@ export function useChannelActions({
   onPickPriority: (c: ManagedChannel, priority: number) => void;
 }) {
   const qc = useQueryClient();
-  const { t } = useTranslation();
+  const { t, i18n } = useTranslation();
+  const lang = i18n.language;
   const confirm = useConfirm();
   const me = useMe();
   const isAdmin = me.role === "admin";
@@ -166,7 +168,7 @@ export function useChannelActions({
     return {
       ...base,
       items: [...tags]
-        .sort((a, b) => a.name.localeCompare(b.name))
+        .sort((a, b) => compareText(a.name, b.name, lang))
         .map((tg) => ({
           id: `tag-${tg.id}`,
           label: tg.name,