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>

shared/src/commonMain/kotlin/com/notemusicali/ui/theme/Theme.kt

@@ -0,0 +1,107 @@
+package com.notemusicali.ui.theme
+
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.graphics.Brush
+import androidx.compose.ui.graphics.Color
+
+// Remotion video-inspired palette
+object AppColors {
+    val bgDark = Color(0xFF0A0118)
+    val bgPurple = Color(0xFF1A0533)
+    val bgIndigo = Color(0xFF2D1B69)
+    val accent = Color(0xFFFFD700)       // Gold
+    val accentWarm = Color(0xFFFFA500)   // Orange-gold
+    val accentRose = Color(0xFFFF6B9D)   // Rose
+    val text = Color.White
+    val textMuted = Color.White.copy(alpha = 0.6f)
+    val cardBg = Color.White.copy(alpha = 0.06f)
+    val cardBorder = Color.White.copy(alpha = 0.12f)
+    val noteGlow = Color(0x66FFD700)     // Gold glow
+}
+
+private val DarkColorScheme = darkColorScheme(
+    primary = AppColors.accent,
+    secondary = AppColors.accentRose,
+    tertiary = Color(0xFF4ECDC4),
+    background = AppColors.bgDark,
+    surface = AppColors.bgPurple,
+    onPrimary = Color.Black,
+    onSecondary = Color.Black,
+    onTertiary = Color.Black,
+    onBackground = Color.White,
+    onSurface = Color.White,
+    surfaceVariant = AppColors.bgIndigo,
+)
+
+object CardGradients {
+    // Home cards — glass-like with subtle colored tints on dark purple base
+    val tuner = Brush.linearGradient(listOf(Color(0xFF1A1040), Color(0xFF2D1B69)))
+    val practice = Brush.linearGradient(listOf(Color(0xFF0D1F2D), Color(0xFF1A0533)))
+    val exercises = Brush.linearGradient(listOf(Color(0xFF2A1020), Color(0xFF1A0533)))
+    val history = Brush.linearGradient(listOf(Color(0xFF1A0533), Color(0xFF0A0118)))
+    val scores = Brush.linearGradient(listOf(Color(0xFF0D1A2D), Color(0xFF1A0533)))
+    val scoreFile = Brush.linearGradient(listOf(Color(0xFF151025), Color(0xFF0A0118)))
+
+    val metronome = Brush.linearGradient(listOf(Color(0xFF1E1035), Color(0xFF0A0118)))
+    val reference = Brush.linearGradient(listOf(Color(0xFF0D1F33), Color(0xFF1A0533)))
+    val scales = Brush.linearGradient(listOf(Color(0xFF101E15), Color(0xFF1A0533)))
+    val earTraining = Brush.linearGradient(listOf(Color(0xFF2D1050), Color(0xFF1A0533)))
+    val challenge = Brush.linearGradient(listOf(Color(0xFF2A0D1A), Color(0xFF1A0533)))
+    val stats = Brush.linearGradient(listOf(Color(0xFF0D1533), Color(0xFF1A0533)))
+    val goals = Brush.linearGradient(listOf(Color(0xFF2A1A05), Color(0xFF1A0533)))
+    val leaderboard = Brush.linearGradient(listOf(Color(0xFF151040), Color(0xFF1A0533)))
+    val guide = Brush.linearGradient(listOf(Color(0xFF151525), Color(0xFF0A0118)))
+
+    // Practice setup
+    val setup = Brush.linearGradient(listOf(Color(0xFF0D1F2D), Color(0xFF1A0533)))
+
+    // Exercise levels — subtle colored tints
+    val level1 = Brush.linearGradient(listOf(Color(0xFF0D2015), Color(0xFF1A0533)))
+    val level2 = Brush.linearGradient(listOf(Color(0xFF0D1533), Color(0xFF1A0533)))
+    val level3 = Brush.linearGradient(listOf(Color(0xFF2A1A05), Color(0xFF1A0533)))
+    val level4 = Brush.linearGradient(listOf(Color(0xFF2A0D15), Color(0xFF1A0533)))
+
+    fun forLevel(level: Int): Brush = when (level) {
+        1 -> level1
+        2 -> level2
+        3 -> level3
+        else -> level4
+    }
+}
+
+// Accent colors for each card category (used for top accent lines and icon tints)
+object CardAccents {
+    val tuner = Color(0xFF4ECDC4)
+    val metronome = Color(0xFFFFD700)
+    val reference = Color(0xFF90CAF9)
+    val practice = Color(0xFF4CAF50)
+    val exercises = Color(0xFFFF6B9D)
+    val scales = Color(0xFF66BB6A)
+    val scores = Color(0xFF4DD0E1)
+    val earTraining = Color(0xFFCE93D8)
+    val challenge = Color(0xFFEF5350)
+    val leaderboard = Color(0xFF7986CB)
+    val stats = Color(0xFF42A5F5)
+    val goals = Color(0xFFFFA726)
+    val history = Color(0xFFAB47BC)
+    val guide = Color(0xFF78909C)
+}
+
+object TunerColors {
+    val inTune = Color(0xFF4CAF50)
+    val outOfTune = Color(0xFFF44336)
+    val silence = Color(0xFF424242)
+    val inTuneBackground = Color(0xFF0D200D)
+    val outOfTuneBackground = Color(0xFF2A0D0D)
+    val silenceBackground = AppColors.bgDark
+}
+
+@Composable
+fun NoteMusicaliTheme(content: @Composable () -> Unit) {
+    MaterialTheme(
+        colorScheme = DarkColorScheme,
+        content = content,
+    )
+}