* fix(desktop): allow camera capture through the permission handlers
The session permission hooks were written for the voice composer and denied
video outright, so any renderer getUserMedia({video}) failed with
NotAllowedError before the OS was ever consulted.
Rename isAudioCapturePermission to isMediaCapturePermission and accept video
alongside audio in both the request and check handlers. The OS capture
permission still applies, so the user keeps a real allow/deny.
* build(desktop): declare camera usage for signed macOS builds
A hardened-runtime build needs the camera entitlement and an
NSCameraUsageDescription string, or the packaged app is killed on first
camera access instead of prompting.
c8cdeb435f