Add a "clear cache" function

Mobile Music Assistant/ViewsMainTabView.swift

@@ -392,7 +392,8 @@ struct SettingsView: View {
     @Environment(\.localeManager) private var localeManager
     @Environment(MAStoreManager.self) private var storeManager
     @State private var showThankYou = false
-    
+    @State private var showClearCacheConfirm = false
+
     var body: some View {
         NavigationStack {
             Form {
@@ -476,12 +477,19 @@ struct SettingsView: View {
                 
                 // Actions Section
                 Section {
+                    Button(role: .destructive) {
+                        showClearCacheConfirm = true
+                    } label: {
+                        Label("Clear Cache", systemImage: "trash")
+                    }
                     Button(role: .destructive) {
                         service.disconnect()
                         service.authManager.logout()
                     } label: {
                         Label("Disconnect", systemImage: "arrow.right.square")
                     }
+                } footer: {
+                    Text("Clearing the cache removes all locally stored artwork and library data. The next launch or reload may take longer.")
                 }
 
                 // Support Development Section
@@ -536,6 +544,15 @@ struct SettingsView: View {
             .task {
                 await storeManager.loadProducts()
             }
+            .alert("Clear Cache?", isPresented: $showClearCacheConfirm) {
+                Button("Clear", role: .destructive) {
+                    ImageCache.shared.clearAll()
+                    service.libraryManager.clearAll()
+                }
+                Button("Cancel", role: .cancel) { }
+            } message: {
+                Text("This will delete all locally cached artwork and library data. The next launch or reload may take longer while everything is fetched again.")
+            }
             .alert("Thank You!", isPresented: $showThankYou) {
                 Button("You're welcome!", role: .cancel) { }
             } message: {