Remap buttons mutual exclusivity

DynamicIsland/components/Notch/MinimalisticMusicPlayerView.swift

@@ -670,7 +670,7 @@ private struct MinimalisticReminderDetailsView: View {
                 Task { await musicManager.toggleShuffle() }
             }
         case .repeatMode:
-            controlButton(icon: repeatIcon, isActive: musicManager.repeatMode != .off) {
+            controlButton(icon: repeatIcon, isActive: musicManager.repeatMode != .off, symbolEffect: .replace) {
                 Task { await musicManager.toggleRepeat() }
             }
         case .mediaOutput:
@@ -706,7 +706,8 @@ private struct MinimalisticReminderDetailsView: View {
                 fontWeight: .medium,
                 frameSize: CGSize(width: 40, height: 40),
                 cornerRadius: 16,
-                foregroundColor: .white.opacity(0.85)
+                foregroundColor: .white.opacity(0.85),
+                symbolEffectStyle: .replace
             ) {
                 isPopoverPresented.toggle()
                 if isPopoverPresented {

DynamicIsland/components/Settings/SettingsView.swift

@@ -857,6 +857,8 @@ struct Media: View {
     @Default(.showShuffleAndRepeat) private var showShuffleAndRepeat
     @Default(.musicAuxLeftControl) private var musicAuxLeftControl
     @Default(.musicAuxRightControl) private var musicAuxRightControl
+    @State private var previousLeftAuxControl: MusicAuxiliaryControl = Defaults[.musicAuxLeftControl]
+    @State private var previousRightAuxControl: MusicAuxiliaryControl = Defaults[.musicAuxRightControl]
 
     var body: some View {
         Form {
@@ -969,6 +971,42 @@ struct Media: View {
                     Defaults[.enableFullscreenMediaDetection] = hideNotchOption != .never
                 }
         }
+        .onAppear {
+            ensureAuxControlsUnique()
+            previousLeftAuxControl = musicAuxLeftControl
+            previousRightAuxControl = musicAuxRightControl
+        }
+        .onChange(of: musicAuxLeftControl) { newValue in
+            if newValue == musicAuxRightControl {
+                let fallback = MusicAuxiliaryControl.alternative(
+                    excluding: newValue,
+                    preferring: previousLeftAuxControl
+                )
+                if fallback != musicAuxRightControl {
+                    musicAuxRightControl = fallback
+                }
+            }
+
+            previousLeftAuxControl = newValue
+        }
+        .onChange(of: musicAuxRightControl) { newValue in
+            if newValue == musicAuxLeftControl {
+                let fallback = MusicAuxiliaryControl.alternative(
+                    excluding: newValue,
+                    preferring: previousRightAuxControl
+                )
+                if fallback != musicAuxLeftControl {
+                    musicAuxLeftControl = fallback
+                }
+            }
+
+            previousRightAuxControl = newValue
+        }
+        .onChange(of: showShuffleAndRepeat) { isEnabled in
+            if isEnabled {
+                ensureAuxControlsUnique()
+            }
+        }
         .navigationTitle("Media")
     }
 
@@ -980,6 +1018,15 @@ struct Media: View {
             return MediaControllerType.allCases
         }
     }
+
+    private func ensureAuxControlsUnique() {
+        guard showShuffleAndRepeat, musicAuxLeftControl == musicAuxRightControl else { return }
+
+        let fallback = MusicAuxiliaryControl.alternative(excluding: musicAuxLeftControl)
+        if fallback != musicAuxRightControl {
+            musicAuxRightControl = fallback
+        }
+    }
 }
 
 struct CalendarSettings: View {

DynamicIsland/models/Constants.swift

@@ -230,8 +230,15 @@ enum MusicAuxiliaryControl: String, CaseIterable, Identifiable, Defaults.Seriali
         }
     }
 
-    static func alternative(excluding control: MusicAuxiliaryControl) -> MusicAuxiliaryControl {
-        allCases.first { $0 != control } ?? .shuffle
+    static func alternative(
+        excluding control: MusicAuxiliaryControl,
+        preferring candidate: MusicAuxiliaryControl? = nil
+    ) -> MusicAuxiliaryControl {
+        if let candidate, candidate != control {
+            return candidate
+        }
+
+        return allCases.first { $0 != control } ?? .shuffle
     }
 }
 
@@ -596,12 +603,22 @@ extension Defaults.Keys {
     }
 
     static func migrateMusicAuxControls() {
-        guard Defaults[.didMigrateMusicAuxControls] == false else { return }
-
+        if Defaults[.didMigrateMusicAuxControls] == false {
             if Defaults[.showMediaOutputControl] {
                 Defaults[.musicAuxRightControl] = .mediaOutput
             }
 
             Defaults[.didMigrateMusicAuxControls] = true
         }
+
+        normalizeMusicAuxControls()
+    }
+
+    private static func normalizeMusicAuxControls() {
+        guard Defaults[.musicAuxLeftControl] == Defaults[.musicAuxRightControl] else { return }
+
+        let current = Defaults[.musicAuxLeftControl]
+        let fallback = MusicAuxiliaryControl.alternative(excluding: current)
+        Defaults[.musicAuxRightControl] = fallback
+    }
 }