fix(fullscreen): respect Settings clock format on wall clock (#1025)

* fix(fullscreen): respect Settings clock format on wall clock

The fullscreen player corner clock always used the browser locale default
(12-hour). Route it through formatClockTime and authStore.clockFormat so
24-hour matches queue ETA and sleep-timer preview.

* docs(changelog): fullscreen clock format fix (PR #1025)

src/components/fullscreenPlayer/FsClock.test.tsx

@@ -0,0 +1,31 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { screen } from '@testing-library/react';
+import { renderWithProviders } from '../../test/helpers/renderWithProviders';
+import { resetAuthStore } from '../../test/helpers/storeReset';
+import { useAuthStore } from '../../store/authStore';
+import { FsClock } from './FsClock';
+
+describe('FsClock', () => {
+  beforeEach(() => {
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date(2026, 0, 1, 21, 59, 0));
+    resetAuthStore();
+  });
+
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  it('uses the 24-hour clock format from Settings → System', () => {
+    useAuthStore.setState({ clockFormat: '24h' });
+    renderWithProviders(<FsClock />);
+    expect(screen.getByText('21:59')).toBeInTheDocument();
+    expect(screen.queryByText(/AM|PM/i)).toBeNull();
+  });
+
+  it('uses the 12-hour clock format when selected', () => {
+    useAuthStore.setState({ clockFormat: '12h' });
+    renderWithProviders(<FsClock />);
+    expect(screen.getByText('09:59 PM')).toBeInTheDocument();
+  });
+});

src/components/fullscreenPlayer/FsClock.tsx

@@ -1,8 +1,7 @@
 import { memo, useEffect, useState } from 'react';
-
-function formatClock(): string {
-  return new Date().toLocaleTimeString(undefined, { hour: 'numeric', minute: '2-digit' });
-}
+import { useTranslation } from 'react-i18next';
+import { useAuthStore } from '../../store/authStore';
+import { formatClockTime } from '../../utils/format/formatClockTime';
 
 /**
  * Standalone wall-clock for the fullscreen player. Owns its own state so the
@@ -10,11 +9,19 @@ function formatClock(): string {
  * the minute rollover) and pauses while the window/tab is hidden.
  */
 export const FsClock = memo(function FsClock() {
-  const [time, setTime] = useState(formatClock);
+  const clockFormat = useAuthStore(s => s.clockFormat);
+  const { i18n } = useTranslation();
+
+  const formatNow = () => formatClockTime(Date.now(), clockFormat, i18n.language);
+  const [time, setTime] = useState(formatNow);
+
+  useEffect(() => {
+    setTime(formatNow());
+  }, [clockFormat, i18n.language]);
 
   useEffect(() => {
     let id: number | undefined;
-    const tick = () => setTime(formatClock());
+    const tick = () => setTime(formatClockTime(Date.now(), clockFormat, i18n.language));
     const sync = () => {
       if (document.hidden) {
         if (id !== undefined) { clearInterval(id); id = undefined; }
@@ -29,7 +36,7 @@ export const FsClock = memo(function FsClock() {
       if (id !== undefined) clearInterval(id);
       document.removeEventListener('visibilitychange', sync);
     };
-  }, []);
+  }, [clockFormat, i18n.language]);
 
   return <span className="fsp-clock">{time}</span>;
 });