agra a6d2539722 camera: macOS device discovery now includes external + Continuity ...

Discovery was hard-coded to `.builtInWideAngleCamera` only — that
catches the iOS front/back cameras and the macOS FaceTime HD on
macOS 14+, but missed USB webcams (`.external` on 14+,
`.externalUnknown` before) and iPhone-as-webcam Continuity Camera
(`.continuityCamera` on 14+). On Macs whose built-in camera doesn't
expose itself as `.builtInWideAngleCamera`, the result was "no
camera detected".

Device types are now platform-conditional: iOS keeps the wide-angle
filter as-is; macOS adds the externals + Continuity (gated via
`if #available(macOS 14.0, *)` for the post-14 forms vs the
deprecated `.externalUnknown` for older macOS). The `#if os(macOS)`
guard is unavoidable — `.external` and friends literally aren't
declared as enum cases on iOS.

2026-05-13 18:58:37 +03:00

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