Add a "clear cache" function

Mobile Music Assistant/Localizable.xcstrings

@@ -716,6 +716,94 @@
         }
       }
     },
+    "Clear Cache" : {
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Cache leeren"
+          }
+        },
+        "es" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Borrar caché"
+          }
+        },
+        "fr" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Vider le cache"
+          }
+        }
+      }
+    },
+    "Clear Cache?" : {
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Cache leeren?"
+          }
+        },
+        "es" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "¿Borrar caché?"
+          }
+        },
+        "fr" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Vider le cache ?"
+          }
+        }
+      }
+    },
+    "This will delete all locally cached artwork and library data. The next launch or reload may take longer while everything is fetched again." : {
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Dadurch werden alle lokal gespeicherten Bilder und Bibliotheksdaten gelöscht. Der nächste Start oder das nächste Laden kann länger dauern, während alles neu abgerufen wird."
+          }
+        },
+        "es" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Esto eliminará todas las ilustraciones y datos de biblioteca almacenados localmente. El siguiente inicio o recarga puede tardar más mientras todo se vuelve a descargar."
+          }
+        },
+        "fr" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Cela supprimera toutes les illustrations et données de bibliothèque stockées localement. Le prochain démarrage ou rechargement peut prendre plus de temps pendant que tout est à nouveau récupéré."
+          }
+        }
+      }
+    },
+    "Clearing the cache removes all locally stored artwork and library data. The next launch or reload may take longer." : {
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Das Leeren des Caches entfernt alle lokal gespeicherten Bilder und Bibliotheksdaten. Der nächste Start oder das nächste Laden kann länger dauern."
+          }
+        },
+        "es" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Borrar el caché elimina todas las ilustraciones y datos de biblioteca almacenados localmente. El siguiente inicio o recarga puede tardar más."
+          }
+        },
+        "fr" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Vider le cache supprime toutes les illustrations et données de bibliothèque stockées localement. Le prochain démarrage ou rechargement peut prendre plus de temps."
+          }
+        }
+      }
+    },
     "Connect" : {
       "localizations" : {
         "de" : {

Mobile Music Assistant/ServicesMALibraryManager.swift

@@ -145,6 +145,36 @@ final class MALibraryManager {
         return try? JSONDecoder().decode(T.self, from: data)
     }
 
+    /// Clears all cached library data from memory and disk.
+    func clearAll() {
+        artists = []
+        albumArtists = []
+        albums = []
+        playlists = []
+        podcasts = []
+        favoriteURIs = []
+        artistsOffset = 0
+        albumArtistsOffset = 0
+        albumsOffset = 0
+        hasMoreArtists = true
+        hasMoreAlbumArtists = true
+        hasMoreAlbums = true
+        lastArtistsRefresh = nil
+        lastAlbumArtistsRefresh = nil
+        lastAlbumsRefresh = nil
+        lastPlaylistsRefresh = nil
+        lastPodcastsRefresh = nil
+
+        let ud = UserDefaults.standard
+        for key in ["lib.lastArtistsRefresh", "lib.lastAlbumArtistsRefresh",
+                    "lib.lastAlbumsRefresh", "lib.lastPlaylistsRefresh", "lib.lastPodcastsRefresh"] {
+            ud.removeObject(forKey: key)
+        }
+
+        try? FileManager.default.removeItem(at: cacheDirectory)
+        try? FileManager.default.createDirectory(at: cacheDirectory, withIntermediateDirectories: true)
+    }
+
     private func markRefreshed(_ key: String) -> Date {
         let now = Date()
         UserDefaults.standard.set(now, forKey: key)

Mobile Music Assistant/ViewsMainTabView.swift

@@ -392,6 +392,7 @@ 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 {
@@ -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: {