✨ feat: Enhance app icon and status bar functionality

Add a new app icon and improve the status bar icon update logic.
The status bar icon now reflects the current playback state,
providing a clearer user experience.

AppDelegate.swift

@@ -26,9 +26,10 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         statusItem = NSStatusBar.system.statusItem(withLength: NSStatusItem.variableLength)
 
         if let button = statusItem?.button {
-            button.title = "🤡"
             button.target = self
             button.action = #selector(toggleMenu)
+            button.imagePosition = .imageLeft
+            updateStatusBarIcon()
         }
 
         setupMenu()
@@ -151,9 +152,19 @@ class AppDelegate: NSObject, NSApplicationDelegate {
             playPauseItem.title = playerManager.isPlaying ? NSLocalizedString("Pause", comment: "") : NSLocalizedString("Play", comment: "")
         }
 
+        updateStatusBarIcon()
         updatePlayModeMenuItems()
     }
 
+    private func updateStatusBarIcon() {
+        if let button = statusItem?.button {
+            let configuration = NSImage.SymbolConfiguration(pointSize: 18, weight: .regular)
+            let symbolName = playerManager.isPlaying ? "headphones.circle.fill" : "headphones.circle"
+            let icon = NSImage(systemSymbolName: symbolName, accessibilityDescription: "Music")?.withSymbolConfiguration(configuration)
+            button.image = icon
+        }
+    }
+
     @objc func togglePlayPause() {
         if playerManager.isPlaying {
             playerManager.pause()

MacMusicPlayer/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -46,6 +46,7 @@
       "size" : "512x512"
     },
     {
+      "filename" : "music-good.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "512x512"