fix(settings): desktop-gate the frame-copy toggle and drop the platform list from its description

The toggle only renders when the engine is available on the current
machine (or a stale opt-in needs clearing), so enumerating supported
platforms in the description was redundant and doomed to go stale — all
18 locales now describe the behavior only. The visibility condition also
gains an explicit isDesktop gate: the stale-opt-in fallback could have
surfaced the checkbox in the PWA if a stored settings value ever carried
embeddedMpvFrameCopy=true. Spec covers desktop-available, stale-opt-in
and PWA-hidden cases.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

apps/web/src/app/settings/settings-playback-section.component.html

@@ -114,7 +114,10 @@
             </div>
         </div>
 
-        @if (frameCopyAvailable() || form().value.embeddedMpvFrameCopy) {
+        @if (
+            isDesktop() &&
+            (frameCopyAvailable() || form().value.embeddedMpvFrameCopy)
+        ) {
             <div
                 class="setting-item"
                 data-test-id="embedded-mpv-frame-copy-setting"

apps/web/src/app/settings/settings-playback-section.component.spec.ts

@@ -171,6 +171,48 @@ describe('SettingsPlaybackSectionComponent', () => {
         ).toBeNull();
     });
 
+    it('shows the frame-copy toggle when the engine is available on desktop', () => {
+        fixture.componentRef.setInput('isDesktop', true);
+        fixture.componentRef.setInput('frameCopyAvailable', true);
+        fixture.detectChanges();
+
+        expect(
+            fixture.nativeElement.querySelector(
+                '[data-test-id="embedded-mpv-frame-copy-setting"]'
+            )
+        ).not.toBeNull();
+    });
+
+    it('keeps a stale frame-copy opt-in clearable on desktop without the helper', () => {
+        const form = createForm();
+        form.controls['embeddedMpvFrameCopy'].setValue(true);
+        fixture.componentRef.setInput('form', form);
+        fixture.componentRef.setInput('isDesktop', true);
+        fixture.componentRef.setInput('frameCopyAvailable', false);
+        fixture.detectChanges();
+
+        expect(
+            fixture.nativeElement.querySelector(
+                '[data-test-id="embedded-mpv-frame-copy-setting"]'
+            )
+        ).not.toBeNull();
+    });
+
+    it('never shows the frame-copy toggle in the PWA, even with a stored opt-in', () => {
+        const form = createForm();
+        form.controls['embeddedMpvFrameCopy'].setValue(true);
+        fixture.componentRef.setInput('form', form);
+        fixture.componentRef.setInput('isDesktop', false);
+        fixture.componentRef.setInput('frameCopyAvailable', false);
+        fixture.detectChanges();
+
+        expect(
+            fixture.nativeElement.querySelector(
+                '[data-test-id="embedded-mpv-frame-copy-setting"]'
+            )
+        ).toBeNull();
+    });
+
     it('shows the recording folder setting only in desktop builds', () => {
         fixture.componentRef.setInput('isDesktop', true);
         fixture.detectChanges();
@@ -364,6 +406,7 @@ function createForm(player = VideoPlayer.VideoJs): FormGroup {
         streamFormat: new FormControl(StreamFormat.AutoStreamFormat),
         openStreamOnDoubleClick: new FormControl(false),
         showExternalPlaybackBar: new FormControl(true),
+        embeddedMpvFrameCopy: new FormControl(false),
         mpvPlayerPath: new FormControl(''),
         mpvPlayerArguments: new FormControl(''),
         mpvReuseInstance: new FormControl(false),

apps/web/src/assets/i18n/ar.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "MPV المدمج: محرك نسخ الإطارات (تجريبي)",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "يُرسم الفيديو على لوحة التطبيق بحيث تظهر القوائم ومربعات الحوار فوقه. متاح فقط على macOS بمعالج Apple Silicon وعلى Windows وLinux.",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "يُرسم الفيديو على لوحة التطبيق بحيث تظهر القوائم ومربعات الحوار فوقه.",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "يسري المفعول بعد إعادة تشغيل التطبيق."
     },
     "THEMES": {

apps/web/src/assets/i18n/ary.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "MPV المدمج: محرك نسخ الإطارات (تجريبي)",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "الفيديو كيترسم على لوحة التطبيق باش القوائم والحوارات يبانو فوقو. غير على macOS ب Apple Silicon و Windows و Linux.",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "الفيديو كيترسم على لوحة التطبيق باش القوائم والحوارات يبانو فوقو.",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "غادي يخدم من بعد ما تعاود تشغل التطبيق."
     },
     "THEMES": {

apps/web/src/assets/i18n/by.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "Embedded MPV: рухавік frame-copy (эксперыментальна)",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Відэа малюецца на канвасе праграмы, таму меню і дыялогі паказваюцца па-над ім. Толькі macOS на Apple Silicon, Windows і Linux.",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Відэа малюецца на канвасе праграмы, таму меню і дыялогі паказваюцца па-над ім.",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "Пачне дзейнічаць пасля перазапуску праграмы."
     },
     "THEMES": {

apps/web/src/assets/i18n/de.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "Embedded MPV: Frame-Copy-Engine (experimentell)",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Das Video wird auf die App-Leinwand gerendert, sodass Menüs und Dialoge darüber liegen. Nur macOS auf Apple Silicon, Windows und Linux.",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Das Video wird auf die App-Leinwand gerendert, sodass Menüs und Dialoge darüber liegen.",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "Wird nach einem Neustart der App wirksam."
     },
     "THEMES": {

apps/web/src/assets/i18n/el.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "Embedded MPV: μηχανή frame-copy (πειραματικό)",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Το βίντεο σχεδιάζεται στον καμβά της εφαρμογής, ώστε τα μενού και τα παράθυρα διαλόγου να εμφανίζονται από πάνω του. Μόνο macOS με Apple Silicon, Windows και Linux.",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Το βίντεο σχεδιάζεται στον καμβά της εφαρμογής, ώστε τα μενού και τα παράθυρα διαλόγου να εμφανίζονται από πάνω του.",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "Ισχύει μετά την επανεκκίνηση της εφαρμογής."
     },
     "THEMES": {

apps/web/src/assets/i18n/en.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "Embedded MPV: frame-copy engine (experimental)",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Render video onto the app canvas so menus and dialogs stack above it. macOS (Apple Silicon), Windows, and Linux only.",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Render video onto the app canvas so menus and dialogs stack above it.",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "Takes effect after restarting the app."
     },
     "THEMES": {

apps/web/src/assets/i18n/es.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "Embedded MPV: motor frame-copy (experimental)",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "El vídeo se dibuja en el lienzo de la aplicación, de modo que los menús y diálogos quedan encima. Solo macOS con Apple Silicon, Windows y Linux.",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "El vídeo se dibuja en el lienzo de la aplicación, de modo que los menús y diálogos quedan encima.",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "Se aplica tras reiniciar la aplicación."
     },
     "THEMES": {

apps/web/src/assets/i18n/fr.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "Embedded MPV : moteur frame-copy (expérimental)",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "La vidéo est rendue sur le canevas de l'application, les menus et boîtes de dialogue s'affichent donc au-dessus. macOS Apple Silicon, Windows et Linux uniquement.",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "La vidéo est rendue sur le canevas de l'application, les menus et boîtes de dialogue s'affichent donc au-dessus.",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "Prend effet après le redémarrage de l'application."
     },
     "THEMES": {

apps/web/src/assets/i18n/it.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "Embedded MPV: motore frame-copy (sperimentale)",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Il video viene disegnato sul canvas dell'app, così menu e finestre di dialogo appaiono sopra di esso. Solo macOS con Apple Silicon, Windows e Linux.",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Il video viene disegnato sul canvas dell'app, così menu e finestre di dialogo appaiono sopra di esso.",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "Ha effetto dopo il riavvio dell'app."
     },
     "THEMES": {

apps/web/src/assets/i18n/ja.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "埋め込みMPV：フレームコピーエンジン（実験的）",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "映像をアプリのキャンバスに描画するため、メニューやダイアログをその上に表示できます。Apple Silicon搭載macOS、Windows、Linuxのみ。",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "映像をアプリのキャンバスに描画するため、メニューやダイアログをその上に表示できます。",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "アプリの再起動後に有効になります。"
     },
     "THEMES": {

apps/web/src/assets/i18n/ko.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "내장 MPV: 프레임 복사 엔진(실험적)",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "비디오를 앱 캔버스에 렌더링하여 메뉴와 대화 상자가 그 위에 표시됩니다. Apple Silicon macOS, Windows 및 Linux 전용.",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "비디오를 앱 캔버스에 렌더링하여 메뉴와 대화 상자가 그 위에 표시됩니다.",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "앱을 다시 시작한 후 적용됩니다."
     },
     "THEMES": {

apps/web/src/assets/i18n/nl.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "Embedded MPV: frame-copy-engine (experimenteel)",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "De video wordt op het app-canvas getekend zodat menu's en dialoogvensters erboven verschijnen. Alleen macOS op Apple Silicon, Windows en Linux.",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "De video wordt op het app-canvas getekend zodat menu's en dialoogvensters erboven verschijnen.",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "Wordt van kracht na het herstarten van de app."
     },
     "THEMES": {

apps/web/src/assets/i18n/pl.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "Embedded MPV: silnik frame-copy (eksperymentalny)",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Wideo jest rysowane na kanwie aplikacji, dzięki czemu menu i okna dialogowe wyświetlają się nad nim. Tylko macOS na Apple Silicon, Windows i Linux.",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Wideo jest rysowane na kanwie aplikacji, dzięki czemu menu i okna dialogowe wyświetlają się nad nim.",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "Zacznie działać po ponownym uruchomieniu aplikacji."
     },
     "THEMES": {

apps/web/src/assets/i18n/pt.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "Embedded MPV: motor frame-copy (experimental)",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "O vídeo é desenhado na tela da aplicação, para que menus e diálogos fiquem por cima. Apenas macOS com Apple Silicon, Windows e Linux.",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "O vídeo é desenhado na tela da aplicação, para que menus e diálogos fiquem por cima.",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "Entra em vigor após reiniciar a aplicação."
     },
     "THEMES": {

apps/web/src/assets/i18n/ru.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Открыть GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "Что нового",
         "EMBEDDED_MPV_FRAME_COPY": "Embedded MPV: движок frame-copy (экспериментально)",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Видео рисуется на канвасе приложения, поэтому меню и диалоги отображаются поверх него. Только macOS на Apple Silicon, Windows и Linux.",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Видео рисуется на канвасе приложения, поэтому меню и диалоги отображаются поверх него.",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "Вступит в силу после перезапуска приложения."
     },
     "THEMES": {

apps/web/src/assets/i18n/tr.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "Embedded MPV: frame-copy motoru (deneysel)",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Video uygulama tuvaline çizilir, böylece menüler ve iletişim kutuları üzerinde görüntülenir. Yalnızca Apple Silicon macOS, Windows ve Linux.",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "Video uygulama tuvaline çizilir, böylece menüler ve iletişim kutuları üzerinde görüntülenir.",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "Uygulama yeniden başlatıldıktan sonra geçerli olur."
     },
     "THEMES": {

apps/web/src/assets/i18n/zh.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "嵌入式 MPV：帧拷贝引擎（实验性）",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "视频渲染到应用画布上，菜单和对话框可以显示在其上方。仅限 Apple Silicon 的 macOS、Windows 和 Linux。",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "视频渲染到应用画布上，菜单和对话框可以显示在其上方。",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "重启应用后生效。"
     },
     "THEMES": {

apps/web/src/assets/i18n/zhtw.json

@@ -430,7 +430,7 @@
         "APP_UPDATE_OPEN_RELEASE": "Open GitHub release",
         "APP_UPDATE_RELEASE_NOTES": "What's new",
         "EMBEDDED_MPV_FRAME_COPY": "內嵌 MPV：幀複製引擎（實驗性）",
-        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "影片會繪製到應用程式畫布上，選單和對話框可顯示在其上方。僅限 Apple Silicon 的 macOS、Windows 和 Linux。",
+        "EMBEDDED_MPV_FRAME_COPY_DESCRIPTION": "影片會繪製到應用程式畫布上，選單和對話框可顯示在其上方。",
         "EMBEDDED_MPV_FRAME_COPY_RESTART": "重新啟動應用程式後生效。"
     },
     "THEMES": {