The `m3` audio_thread (desktop capture → Opus 48 kHz stereo 5 ms CBR →
AUDIO_MAGIC datagrams) now runs on Windows, fed by the WASAPI loopback
capturer. The `opus` crate vendors libopus via `audiopus_sys` + cmake
(no system lib / vcpkg), so it builds on MSVC — moved into a
`cfg(any(linux, windows))` deps table and widened the audio_thread cfg
to match (the stub now only covers other targets, e.g. macOS).
Build note: CMake 4 rejects libopus's old `cmake_minimum_required`;
set `CMAKE_POLICY_VERSION_MINIMUM=3.5` when building the host on Windows.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
enricobuehler
bb9eef730e