Adds VIDEO_SOURCE_TYPES, getVideoSourceType, getVideoEmbedUrl to
shared-video for multi-platform embed support (Vimeo, Dailymotion,
Twitch). Adds SharedVideoTile and EmbedPlayerManager components.
Updates shared-music with embed player manager and source type helpers.
CSS fixes for meeting intelligence, toolbars, and filmstrip tiles.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Jeff Emmett