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/channelColumns.tsx

@@ -14,7 +14,10 @@ import { RelativeTime } from "./ui/RelativeTime";
 /** The shared "subscribers" DataTable column (right-aligned, sortable, em-dash for null) — identical
  * in the Channels manager and the ChannelDiscovery table, which show subscriber counts on different
  * channel row shapes. */
-export function subsColumn<T extends { subscriber_count: number | null }>(t: TFunction): Column<T> {
+export function subsColumn<T extends { subscriber_count: number | null }>(
+  t: TFunction,
+  lang: string,
+): Column<T> {
   return {
     key: "subs",
     header: t("channels.cols.subs"),
@@ -23,7 +26,7 @@ export function subsColumn<T extends { subscriber_count: number | null }>(t: TFu
     sortable: true,
     sortValue: (c) => c.subscriber_count ?? -1,
     render: (c) => (
-      <span className="text-muted tabular-nums">{formatCountOrDash(c.subscriber_count)}</span>
+      <span className="text-muted tabular-nums">{formatCountOrDash(c.subscriber_count, lang)}</span>
     ),
   };
 }
@@ -50,6 +53,8 @@ export function tagsColumnTest(c: ManagedChannel, values: string[]): boolean {
  * column block lives outside the page component (its cell components are in channelCells). */
 export interface ChannelColumnDeps {
   t: TFunction;
+  /** The UI language, for the numbers — the compiler re-builds the columns when it changes. */
+  lang: string;
   prioOptions: { value: string; label: string }[];
   userTags: ComponentProps<typeof ChannelTagsControl>["userTags"];
   bumpPriority: (id: string, delta: number) => void;
@@ -69,6 +74,7 @@ export interface ChannelColumnDeps {
 export function buildChannelColumns(deps: ChannelColumnDeps): Column<ManagedChannel>[] {
   const {
     t,
+    lang,
     prioOptions,
     userTags,
     bumpPriority,
@@ -144,7 +150,7 @@ export function buildChannelColumns(deps: ChannelColumnDeps): Column<ManagedChan
       // The stored count carries the "fully synced" ✓ charm (R14 folded the retired Sync column in).
       render: (c) => <StoredCell c={c} />,
     },
-    { ...subsColumn<ManagedChannel>(t), width: "6rem" },
+    { ...subsColumn<ManagedChannel>(t, lang), width: "6rem" },
     {
       key: "lastUpload",
       header: t("channels.cols.lastUpload"),
@@ -165,7 +171,7 @@ export function buildChannelColumns(deps: ChannelColumnDeps): Column<ManagedChan
       sortValue: (c) => c.total_duration_seconds,
       render: (c) => (
         <span className="text-muted tabular-nums">
-          {formatTotalHours(c.total_duration_seconds)}
+          {formatTotalHours(c.total_duration_seconds, lang)}
         </span>
       ),
     },