v10.0.0-beta.16

Beta.16 ships the hotkey system. Core gains a hotkey coordinator with key pattern parsing, modifier support, conflict resolution by specificity, input safety in editable fields, and aria-keyshortcuts formatting (#1238). The HTML package adds a declarative <media-hotkey> element and surfaces shortcuts on control buttons (#1239), React gets the matching component (#1241), and the preset audio and video skins now bind shortcuts out of the box: Space or k toggles play, m mutes, arrows seek and adjust volume, and f, c, and i handle fullscreen, subtitles, and picture-in-picture (#1264). Follow-up fixes cover undefined options (#1242), registry setup (#1240), a redundant Shift modifier on the rate keys (#1290), and Alt handling for non-letter characters (#1304).

The second headline lands in core: a gesture system with tap and double-tap recognition, pointer-type filtering, and left/center/right region targeting (#1287). The <media-gesture> element and React bindings follow in beta.17.

Beyond the headliners, the new mux-audio element and MuxAudio React component bring Mux-hosted HLS playback to audio-only players (#1259), the default playback rates now include sub-1x speeds of 0.2, 0.5, and 0.7 (#1231, #1236), the controls feature adds a toggleControls method (#1280), and SPF gains architecture reactors (#1218). The docs site now generates API reference pages for media elements (#1256).

A batch of fixes rounds out the release: a Safari text-track bug that blocked playback (#1226), smoother time slider seeking that starts dragging on pointer down and commits on release (#1291), a React peer dependency narrowed to v18+ (#1289), newly exported SliderPreviewElement and ContextPartElement (#1283), and destroy guards in connectedCallback (#1284).