d631d5219d
The 5.1/7.1 surround commit (7612238) added in-core Opus, which broke two CI jobs
that the merge didn't touch:
* Windows MSIX client: clients/windows/src/main.rs's headless `SessionParams`
initializer was missing the new `audio_channels` field (the GUI path sets it
from settings). Default the CLI/test path to stereo (2), matching trust.rs.
* Apple xcframework (apple.yml + release.yml): in-core Opus decode pulls
`audiopus_sys`, which builds a vendored *static* libopus via CMake when
pkg-config finds no system Opus — keeping the xcframework self-contained (no
runtime libopus.dylib on end-user Macs/devices). The self-hosted macOS runner
lacked `cmake`; install it self-healing before every xcframework build.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>