feat: add Shazam button to SearchBarView

Add isShazamListening and onShazam parameters to SearchBarView with a Shazam logo button that displays listening state and provides tactile feedback.

Music/Views/SearchBarView.swift

@@ -4,6 +4,8 @@ struct SearchBarView: View {
     @State private var searchText = ""
     let trackCount: Int
     let onSearch: (String) -> Void
+    let isShazamListening: Bool
+    let onShazam: () -> Void
 
     var body: some View {
         HStack(spacing: 12) {
@@ -33,6 +35,15 @@ struct SearchBarView: View {
             Text("\(trackCount) tracks")
                 .font(.caption)
                 .foregroundStyle(.secondary)
+
+            Button(action: onShazam) {
+                Image(systemName: "shazam.logo")
+                    .font(.system(size: 16))
+                    .foregroundStyle(isShazamListening ? .blue : .secondary)
+                    .symbolEffect(.pulse, isActive: isShazamListening)
+            }
+            .buttonStyle(.plain)
+            .help(isShazamListening ? "Stop listening" : "Identify song with Shazam")
         }
         .padding(.horizontal, 16)
         .padding(.vertical, 8)