Desktop build plays music and sound through the system sound output; desktop build documented

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/main.rs

@@ -929,8 +929,12 @@ async fn main() {
     let mut voice = voice::Voice::new();
     let mut was_briefing = false;
     let mut cache_t = 0.0f32;
+    #[cfg(not(target_arch = "wasm32"))]
+    audio::native::start();
 
     loop {
+        #[cfg(not(target_arch = "wasm32"))]
+        audio::native::pump();
         let raw_dt = get_frame_time();
         let dt = raw_dt.min(0.1);
         let now = get_time();