Function resolveTranscriptVisible

resolveTranscriptVisible(
    hasTranscript: boolean,
    showTranscript: boolean,
    userVisible: boolean,
): boolean
Resolves whether the transcript panel should actually render, combining:
- whether a transcript exists at all (hasTranscript),
- the consumer's ShowTranscript master switch,
- the user's runtime show/hide toggle state (userVisible).
All three must be truthy for the panel to render. When no transcript exists (or ShowTranscript is false) the runtime toggle is irrelevant.
Parameters
- hasTranscript: boolean
  whether one or more transcript cues are present
- showTranscript: boolean
  the ShowTranscript master input
- userVisible: boolean
  the runtime (toggle-driven) visibility state
Returns boolean
true when the transcript panel should render
- Defined in media-player/src/lib/media-player/transcript-layout.ts:25