Fix tray icon stuck on "listening" after Stop (deadlock) + bump 0.3.29

Engine.Stop() held e.mu while calling cap.Close(). Close ->
device.Uninit() blocks until the in-flight audio callback returns, and
that callback (onFrame) starts by taking e.mu — so Stop and the audio
thread deadlocked against each other whenever a frame was in flight at
click time. The UI goroutine froze inside Stop: running stayed true, the
mic was never released (kept listening), and the icon never reset.

Flip running/cap under the lock, release it, then tear the device down
outside the lock so the in-flight onFrame can finish. Also force
setProcessing(false) afterwards: stopping mid-speech leaves the VAD
segmenter InSpeech, so the "processing" icon would otherwise never clear.

🤖 Generated with Claude Code

Author: Espigah

internal/engine/engine.go

@@ -269,17 +269,30 @@ func (e *Engine) Start() error {
 }
 
 // Stop closes the microphone.
+//
+// We must NOT hold e.mu while calling cap.Close(): Close -> device.Uninit()
+// blocks until the in-flight audio callback returns, and that callback
+// (onFrame) starts by taking e.mu. Holding the lock here would deadlock the
+// two against each other — leaving running=true, the mic open, and the tray
+// icon stuck on "listening". So we flip the state under the lock, release it,
+// and only then tear the device down.
 func (e *Engine) Stop() {
 	e.mu.Lock()
-	defer e.mu.Unlock()
 	if !e.running {
+		e.mu.Unlock()
 		return
 	}
-	if e.cap != nil {
-		e.cap.Close()
-		e.cap = nil
-	}
+	cap := e.cap
+	e.cap = nil
 	e.running = false
+	e.mu.Unlock()
+
+	if cap != nil {
+		cap.Close() // any in-flight onFrame can now take e.mu and finish
+	}
+	// We may have stopped mid-speech (segmenter left InSpeech), so the
+	// "processing" icon would never be cleared on its own — force it back.
+	e.setProcessing(false)
 }
 
 // Running reports whether listening is active.

main.go

@@ -36,7 +36,7 @@ import (
 // icons_other.go uses .png), because the Windows tray needs ICO format.
 
 // version of goto, printed at the start of the log when the app opens.
-const version = "0.3.28"
+const version = "0.3.29"
 
 // startPaused: show the tray without turning listening on (used by the login
 // autostart, so the mic does not go live by itself). Set by `--paused`.