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/lib/jobResult.ts

@@ -22,16 +22,16 @@ export function parseSummary(summary: string | null | undefined): JobResult | nu
  *  stored "new=3, failed=0" — English keys, a Python dict repr for a nested phase. A count's key is
  *  named from `scheduler.result`, a `skipped` / `reason` word from `scheduler.skip`; an unnamed key or
  *  word shows as it is, and an `error` stays the upstream's own text (it is diagnostic). */
-export function jobResultText(t: TFunction, result: JobResult): string {
+export function jobResultText(t: TFunction, result: JobResult, lang: string): string {
   return Object.entries(result)
     .map(([key, value]) => {
       const label = t(`scheduler.result.${key}`, { defaultValue: key.replace(/_/g, " ") });
-      if (typeof value === "number") return `${label}: ${formatNumber(value)}`;
+      if (typeof value === "number") return `${label}: ${formatNumber(value, lang)}`;
       if (typeof value === "string")
         return key === "error"
           ? `${label}: ${value}`
           : `${label}: ${t(`scheduler.skip.${vocabKey(value)}`, { defaultValue: value })}`;
-      return `${label} (${jobResultText(t, value)})`;
+      return `${label} (${jobResultText(t, value, lang)})`;
     })
     .join(" · ");
 }