feat: full WSL2 audio support and Windows audio stability fix

cmd/tui/noise_linux.go

@@ -0,0 +1,23 @@
+//go:build linux
+
+package main
+
+import (
+	"os"
+	"syscall"
+)
+
+func redirectStderr(f *os.File) {
+	if f == nil {
+		// Silence altogether if no debug file
+		null, err := os.OpenFile(os.DevNull, os.O_WRONLY, 0)
+		if err == nil {
+			syscall.Dup2(int(null.Fd()), int(os.Stderr.Fd()))
+		}
+		return
+	}
+
+	// Redirect fd 2 (stderr) to our debug file
+	// This captures C-level library noise (ALSA, PortAudio) into the log
+	syscall.Dup2(int(f.Fd()), int(os.Stderr.Fd()))
+}