feat(settings): add shared web player controls toggle (#1198)

* docs(playback): design shared controls setting

* docs(playback): plan shared controls setting

* feat(settings): persist shared web controls preference

* test(settings): harden shared controls normalization coverage

* feat(settings): expose shared web controls toggle

* fix(settings): label shared controls toggle

* feat(playback): resolve shared controls from settings

* test(playback): cover shared controls setting

* docs(playback): document shared controls preference

* fix(playback): await settings before host creation

* fix(settings): normalize shared controls updates

libs/shared/interfaces/src/lib/settings.interface.ts

@@ -78,6 +78,11 @@ export function normalizeDashboardRailsSettings(
  */
 export interface Settings {
     player: VideoPlayer;
+    /**
+     * Use IPTVnator's shared controls in HTML5, Video.js, and ArtPlayer.
+     * Missing values remain off for compatibility with older saved settings.
+     */
+    webPlayerSharedControls?: boolean;
     epgUrl: string[];
     streamFormat: StreamFormat;
     openStreamOnDoubleClick: boolean;