feat(embedded-mpv): add Windows frame-copy support (#1175)

Port the embedded mpv frame-copy pipeline to Windows with WGL rendering and named shared memory. Includes packaging validation, platform gates, tests, and architecture documentation.

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

@@ -184,7 +184,9 @@
         </div>
     }
 
-    @if (supportsExternalPlayerPathSettings() && form().value.player === 'mpv') {
+    @if (
+        supportsExternalPlayerPathSettings() && form().value.player === 'mpv'
+    ) {
         <div class="setting-item">
             <div class="setting-item__meta">
                 <h4>{{ 'SETTINGS.MPV_PLAYER_PATH_LABEL' | translate }}</h4>
@@ -256,7 +258,9 @@
         </div>
     }
 
-    @if (supportsExternalPlayerPathSettings() && form().value.player === 'vlc') {
+    @if (
+        supportsExternalPlayerPathSettings() && form().value.player === 'vlc'
+    ) {
         <div class="setting-item">
             <div class="setting-item__meta">
                 <h4>{{ 'SETTINGS.VLC_PLAYER_PATH_LABEL' | translate }}</h4>