feat(html-player): add feature-flagged shared controls (#1194)

* feat(html-player): bridge engine state to shared controls

* fix(html-player): avoid HLS subtitle event reentry

* fix(html-player): restore delayed HLS default subtitles

* refactor(html-player): split controls bridge collaborators

* feat(html-player): add feature-flagged shared controls

* test(html-player): cover shared-controls source ownership

* feat(html-player): pass shared-controls playback metadata

* docs(player-controls): describe HTML5 shared-controls bridge

* docs(player-controls): clarify HTML5 rollout effect

* fix(html-player): reveal diagnostics from fullscreen

* fix(html-player): defer HLS event resolution

* refactor(html-player): isolate video element session

libs/ui/playback/src/lib/web-player-view/web-player-view.component.html

@@ -20,6 +20,8 @@
             [channel]="$any(channel)"
             [volume]="volume()"
             [showCaptions]="showCaptions()"
+            [isLive]="resolvedIsLive()"
+            [interactionEnabled]="playbackInteractionEnabled()"
             [startTime]="startTime()"
             [seriesNavigation]="seriesNavigation()"
             (timeUpdate)="timeUpdate.emit($event)"