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.dom.test.ts

@@ -12,12 +12,16 @@ describe("a job's result", () => {
   it("names each count, and a phase's own counts inside it", () => {
     setLanguage("hu");
     const t = i18n.getFixedT("hu");
-    expect(jobResultText(t, { new: 3, failed: 0 })).toBe("új videó: 3 · sikertelen: 0");
+    expect(jobResultText(t, { new: 3, failed: 0 }, "hu")).toBe("új videó: 3 · sikertelen: 0");
     expect(
-      jobResultText(t, {
-        recent: { channels_processed: 0, videos_added: 0, reason: "no service user" },
-        deep: { channels_processed: 2, videos_added: 5, reconciled_full: 1 },
-      }),
+      jobResultText(
+        t,
+        {
+          recent: { channels_processed: 0, videos_added: 0, reason: "no service user" },
+          deep: { channels_processed: 2, videos_added: 5, reconciled_full: 1 },
+        },
+        "hu",
+      ),
     ).toBe(
       "friss (feldolgozott csatorna: 0 · hozzáadott videó: 0 · ok: nincs szolgáltatásfiók) · " +
         "mély (feldolgozott csatorna: 2 · hozzáadott videó: 5 · teljesen egyeztetve: 1)",
@@ -26,15 +30,15 @@ describe("a job's result", () => {
 
   it("names a skip reason; an upstream error stays its own text", () => {
     const t = i18n.getFixedT("hu");
-    expect(jobResultText(t, { enriched: 0, skipped: "tmdb_api_key not set" })).toBe(
+    expect(jobResultText(t, { enriched: 0, skipped: "tmdb_api_key not set" }, "hu")).toBe(
       "kiegészítve: 0 · kihagyva: nincs TMDB API-kulcs",
     );
-    expect(jobResultText(t, { error: "Plex returned 500" })).toBe("hiba: Plex returned 500");
+    expect(jobResultText(t, { error: "Plex returned 500" }, "hu")).toBe("hiba: Plex returned 500");
   });
 
   it("shows a key or word it does not know as it is, readable", () => {
     const t = i18n.getFixedT("hu");
-    expect(jobResultText(t, { brand_new_count: 3, skipped: "moon is full" })).toBe(
+    expect(jobResultText(t, { brand_new_count: 3, skipped: "moon is full" }, "hu")).toBe(
       "brand new count: 3 · kihagyva: moon is full",
     );
   });