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/SyncStatus.tsx

@@ -5,7 +5,7 @@ import { useTranslation } from "react-i18next";
 import { CheckCircle2, Clock, Database, History, Loader2, Pause, Play } from "lucide-react";
 import { api, type MyStatus } from "../lib/api";
 import { notifyActionError } from "../lib/actionErrors";
-import { formatViews } from "../lib/format";
+import { formatCompact } from "../lib/format";
 import { PopoverSurface } from "./ui/AnchoredPopover";
 import { useAnchoredPopover } from "./ui/anchoredPopoverHooks";
 import { Button } from "./ui/Button";
@@ -23,7 +23,8 @@ export default function SyncStatus({
   isAdmin: boolean;
   onGoToFullHistory: () => void;
 }) {
-  const { t } = useTranslation();
+  const { t, i18n } = useTranslation();
+  const lang = i18n.language;
   const qc = useQueryClient();
   const [open, setOpen] = useState(false);
   // A read-out with a couple of controls rather than a list of choices, so it is a `dialog`
@@ -114,8 +115,9 @@ export default function SyncStatus({
   // popover. An accent dot flags the only two things worth interrupting you for (paused / missing
   // history) so the collapsed chip still tells you when to look.
   const needsAttention = data.paused || notFull > 0;
-  const countsText = `${formatViews(data.my_videos)} ${t("header.sync.yours")} / ${formatViews(
+  const countsText = `${formatCompact(data.my_videos, lang)} ${t("header.sync.yours")} / ${formatCompact(
     data.total_videos,
+    lang,
   )} ${t("header.sync.total")}`;
   return (
     <div className="pointer-events-auto shrink-0">
@@ -132,7 +134,9 @@ export default function SyncStatus({
         ) : (
           <Database className="w-3.5 h-3.5 shrink-0" />
         )}
-        <span className="text-fg font-medium tabular-nums">{formatViews(data.my_videos)}</span>
+        <span className="text-fg font-medium tabular-nums">
+          {formatCompact(data.my_videos, lang)}
+        </span>
         {needsAttention && (
           <span className="absolute -top-0.5 -right-0.5 w-2 h-2 rounded-full bg-accent ring-2 ring-bg" />
         )}
@@ -149,10 +153,10 @@ export default function SyncStatus({
         >
           <Database className="w-3.5 h-3.5 shrink-0" />
           <span>
-            <span className="text-fg font-medium">{formatViews(data.my_videos)}</span>{" "}
+            <span className="text-fg font-medium">{formatCompact(data.my_videos, lang)}</span>{" "}
             {t("header.sync.yours")}
             <span className="opacity-40"> / </span>
-            {formatViews(data.total_videos)} {t("header.sync.total")}
+            {formatCompact(data.total_videos, lang)} {t("header.sync.total")}
           </span>
         </div>
         {showMain && (