feat: full WSL2 audio support and Windows audio stability fix

pkg/audio/global_linux.go

@@ -0,0 +1,45 @@
+//go:build linux
+
+package audio
+
+import (
+	"fmt"
+	"os"
+	"sync"
+
+	"github.com/gordonklaus/portaudio"
+)
+
+var (
+	paMu       sync.Mutex
+	paRefCount int
+)
+
+func initPortAudio() error {
+	paMu.Lock()
+	defer paMu.Unlock()
+
+	if paRefCount == 0 {
+		if err := portaudio.Initialize(); err != nil {
+			return err
+		}
+
+		devices, err := portaudio.Devices()
+		if err == nil {
+			fmt.Fprintf(os.Stderr, "[Audio] Linux/PortAudio initialized globally. Devices found: %d\n", len(devices))
+		}
+	}
+	paRefCount++
+	return nil
+}
+
+func terminatePortAudio() {
+	paMu.Lock()
+	defer paMu.Unlock()
+
+	paRefCount--
+	if paRefCount == 0 {
+		fmt.Fprintf(os.Stderr, "[Audio] Linux/PortAudio terminating globally...\n")
+		portaudio.Terminate()
+	}
+}