fix: refine linux voice runtime behavior

crates/chanora_audio/src/lib.rs

@@ -6,7 +6,7 @@
 //! ## What's wired in this Beta
 //!
 //! * Default-input capture via platform audio backends (Oboe on Android,
-//!   VoiceProcessingIO on Apple platforms, cpal/SDL elsewhere)
+//!   VoiceProcessingIO on Apple platforms, PipeWire/PulseAudio on Linux, cpal on Windows)
 //! * Frame-aligned 20 ms / 48 kHz mono Opus encoding via `audiopus`
 //! * Forward encoded frames to the protocol crate as `OutPacket`s
 //! * Inbound voice packets fed to `tsclientlib::audio::AudioHandler`
@@ -32,6 +32,7 @@ pub mod audio_processing;
 pub mod debug_wav;
 mod engine;
 pub mod frame;
+#[cfg(any(target_os = "android", target_os = "ios", target_os = "macos"))]
 pub mod mobile_voice_backend;
 pub mod mode_stack;
 pub(crate) mod opus_voice;
@@ -44,6 +45,7 @@ pub mod transmit_mode;
 pub mod transmit_selector;
 pub mod vad;
 pub mod voice_activity;
+#[cfg(any(target_os = "android", target_os = "ios", test))]
 pub(crate) mod voice_render;
 
 #[cfg(target_os = "linux")]