v0.1.4 - stream deletion + widget rollup

What's Changed

New: delete streams

• The stream page now has a Delete stream button for the stream's owner and holders of the Manage / end others' streams permission — works on live and ended streams and removes the stream permanently. Previously there was no way to remove a stream from the UI.
• The End/Delete buttons are driven by a new backend-computed canEdit capability, so moderators with onair.manage now see them too (they always had the backend permission).

Rolled up from v0.1.2–v0.1.3

• Live Streams widget for Bespoke with inline stream previews, grid layout in wide zones.

Pairs with OnAir+ v0.1.3, which makes the past-streams page a public VOD directory with per-streamer filtering and recording deletion.

Full Changelog: v0.1.1...v0.1.4