Initial commit: InTono — app KMP per l'apprendimento musicale

App Kotlin Multiplatform (Android/iOS/Desktop) con Compose Multiplatform:
controllo intonazione (YIN), pratica guidata, metronomo, ear training,
sfide, scansione spartiti via AI, spartiti bundled e pentagramma con
glifi tipografici, travature, battute e spaziatura proporzionale.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app/proguard-rules.pro

@@ -0,0 +1,64 @@
+# ProGuard rules for InTono (NoteMusicali)
+
+# --- Kotlin ---
+-keepattributes *Annotation*
+-keepattributes Signature
+-keepattributes InnerClasses
+-keepattributes EnclosingMethod
+-keep class kotlin.Metadata { *; }
+-dontwarn kotlin.**
+
+# --- Kotlin Serialization ---
+-keepattributes RuntimeVisibleAnnotations
+-keep class kotlinx.serialization.** { *; }
+-keepclassmembers class * {
+    @kotlinx.serialization.Serializable <fields>;
+}
+-keepclassmembers @kotlinx.serialization.Serializable class * {
+    *** Companion;
+    *** serializer(...);
+    kotlinx.serialization.KSerializer serializer(...);
+}
+-keepclasseswithmembers class * {
+    kotlinx.serialization.KSerializer serializer(...);
+}
+
+# --- Ktor ---
+-keep class io.ktor.** { *; }
+-dontwarn io.ktor.**
+-keep class io.ktor.client.engine.** { *; }
+-keepclassmembers class io.ktor.** { volatile <fields>; }
+
+# --- Coroutines ---
+-keepnames class kotlinx.coroutines.internal.MainDispatcherFactory {}
+-keepnames class kotlinx.coroutines.CoroutineExceptionHandler {}
+-keepclassmembers class kotlinx.coroutines.** { volatile <fields>; }
+-dontwarn kotlinx.coroutines.**
+
+# --- Compose ---
+-keep class androidx.compose.** { *; }
+-dontwarn androidx.compose.**
+
+# --- Multiplatform Settings ---
+-keep class com.russhwolf.settings.** { *; }
+
+# --- App classes ---
+-keep class com.notemusicali.** { *; }
+
+# --- CameraX ---
+-keep class androidx.camera.** { *; }
+-dontwarn androidx.camera.**
+
+# --- Standard Android ---
+-keepclassmembers class * implements android.os.Parcelable {
+    public static final ** CREATOR;
+}
+-keepclassmembers class * implements java.io.Serializable {
+    static final long serialVersionUID;
+    private static final java.io.ObjectStreamField[] serialPersistentFields;
+    !static !transient <fields>;
+    private void writeObject(java.io.ObjectOutputStream);
+    private void readObject(java.io.ObjectInputStream);
+    java.lang.Object writeReplace();
+    java.lang.Object readResolve();
+}