Add instrument checkbox selection

Sources/MusicAssistantApp/Presentation/InstrumentBrowserView.swift

@@ -2,6 +2,7 @@ import MusicAssistantCore
 import SwiftUI
 
 struct InstrumentBrowserView: View {
+    @Binding private var project: SongProject
     private let catalog: LocalInstrumentCatalog
 
     @State private var searchText = ""
@@ -9,7 +10,11 @@ struct InstrumentBrowserView: View {
     @State private var selectedRegionOrigin: String?
     @Environment(\.dismiss) private var dismiss
 
-    init(catalog: LocalInstrumentCatalog = LocalInstrumentCatalog()) {
+    init(
+        project: Binding<SongProject>,
+        catalog: LocalInstrumentCatalog = LocalInstrumentCatalog()
+    ) {
+        _project = project
         self.catalog = catalog
     }
 
@@ -50,21 +55,24 @@ struct InstrumentBrowserView: View {
                     ),
                     id: \.id
                 ) { instrument in
-                    VStack(alignment: .leading, spacing: 4) {
-                        Text(instrument.name)
-                            .font(.body.weight(.medium))
+                    Toggle(isOn: selectionBinding(for: instrument)) {
+                        VStack(alignment: .leading, spacing: 4) {
+                            Text(instrument.name)
+                                .font(.body.weight(.medium))
 
-                        HStack(spacing: 6) {
-                            Text(instrument.familyCategory)
+                            HStack(spacing: 6) {
+                                Text(instrument.familyCategory)
 
-                            if let regionOrigin = instrument.regionOrigin {
-                                Text(regionOrigin)
+                                if let regionOrigin = instrument.regionOrigin {
+                                    Text(regionOrigin)
+                                }
                             }
+                            .font(.caption)
+                            .foregroundStyle(.secondary)
+                            .lineLimit(1)
                         }
-                        .font(.caption)
-                        .foregroundStyle(.secondary)
-                        .lineLimit(1)
                     }
+                    .toggleStyle(.checkbox)
                     .padding(.vertical, 2)
                 }
             }
@@ -80,8 +88,31 @@ struct InstrumentBrowserView: View {
         }
         .frame(minWidth: 460, minHeight: 520)
     }
+
+    private func selectionBinding(for instrument: InstrumentCatalogItem) -> Binding<Bool> {
+        Binding {
+            project.isInstrumentSelected(id: instrument.id)
+        } set: { isSelected in
+            project.setInstrumentSelected(
+                id: instrument.id,
+                isSelected: isSelected,
+                variant: instrument.name
+            )
+        }
+    }
 }
 
 #Preview {
-    InstrumentBrowserView()
+    InstrumentBrowserPreview()
+}
+
+private struct InstrumentBrowserPreview: View {
+    @State private var project = SongProject(
+        title: "Instrument Browser Preview",
+        idea: "Browse the instrument catalog."
+    )
+
+    var body: some View {
+        InstrumentBrowserView(project: $project)
+    }
 }

Sources/MusicAssistantApp/Presentation/ProjectInspectorView.swift

@@ -146,7 +146,7 @@ struct ProjectInspectorView: View {
         }
         .background(Color(nsColor: .windowBackgroundColor))
         .sheet(isPresented: $isInstrumentBrowserPresented) {
-            InstrumentBrowserView()
+            InstrumentBrowserView(project: $project)
         }
     }
 

Sources/MusicAssistantCore/Domain/SongProject.swift

@@ -312,6 +312,33 @@ public extension SongProject {
         instruments[index].selected = false
     }
 
+    mutating func setInstrumentSelected(
+        id instrumentId: String,
+        isSelected: Bool,
+        variant: String? = nil
+    ) {
+        guard isSelected else {
+            deselectInstrument(id: instrumentId)
+            return
+        }
+
+        if let index = instruments.firstIndex(where: { $0.instrumentId == instrumentId }) {
+            instruments[index].selected = true
+
+            if instruments[index].variant == nil {
+                instruments[index].variant = variant
+            }
+        } else {
+            instruments.append(
+                InstrumentTrack(
+                    instrumentId: instrumentId,
+                    selected: true,
+                    variant: variant
+                )
+            )
+        }
+    }
+
     mutating func configureInstrument(
         id instrumentId: String,
         variant: String?,