Fix mute/unmute race condition

VoiceInk/MediaController.swift

@@ -9,6 +9,7 @@ class MediaController: ObservableObject {
     static let shared = MediaController()
     private var didMuteAudio = false
     private var wasAudioMutedBeforeRecording = false
+    private var currentMuteTask: Task<Bool, Never>?
     
     @Published var isSystemMuteEnabled: Bool = UserDefaults.standard.bool(forKey: "isSystemMuteEnabled") {
         didSet {
@@ -49,6 +50,10 @@ class MediaController: ObservableObject {
     func muteSystemAudio() async -> Bool {
         guard isSystemMuteEnabled else { return false }
         
+        // Cancel any existing mute task and create a new one
+        currentMuteTask?.cancel()
+        
+        let task = Task<Bool, Never> {
             // First check if audio is already muted
             wasAudioMutedBeforeRecording = isSystemAudioMuted()
             
@@ -63,16 +68,26 @@ class MediaController: ObservableObject {
             return success
         }
         
+        currentMuteTask = task
+        return await task.value
+    }
+    
     /// Restores system audio after recording
     func unmuteSystemAudio() async {
         guard isSystemMuteEnabled else { return }
         
+        // Wait for any pending mute operation to complete first
+        if let muteTask = currentMuteTask {
+            _ = await muteTask.value
+        }
+        
         // Only unmute if we actually muted it (and it wasn't already muted)
         if didMuteAudio && !wasAudioMutedBeforeRecording {
             _ = executeAppleScript(command: "set volume without output muted")
         }
         
         didMuteAudio = false
+        currentMuteTask = nil
     }
     
     /// Executes an AppleScript command