feat: add redo and undo commands

Memola/App/Application.swift

@@ -15,17 +15,13 @@ final class Application: NSObject, ObservableObject {
 
 extension Application {
     func openMemo(_ memoObject: MemoObject?) {
-        withAnimation(.easeOut) {
         self.memoObject = memoObject
     }
-    }
 
     func closeMemo() {
-        withAnimation(.easeOut) {
         self.memoObject = nil
     }
 }
-}
 
 extension Application {
     func activateSearchBar() {

Memola/Features/Dashboard/Dashboard/DashboardView.swift

@@ -19,6 +19,21 @@ struct DashboardView: View {
 
     var body: some View {
         #if os(macOS)
+        ZStack {
+            if let memo = application.memoObject {
+                NavigationStack {
+                    MemoView(memo: memo)
+                        .onDisappear {
+                            withPersistence(\.viewContext) { context in
+                                try context.saveIfNeeded()
+                                context.refreshAllObjects()
+                            }
+                        }
+                        .navigationTitle("")
+                }
+                .transition(.opacity)
+                .matchedGeometryEffect(id: "pop-up", in: namespace)
+            } else {
                 NavigationSplitView(columnVisibility: $columnVisibility) {
                     Sidebar(sidebarItem: $sidebarItem, horizontalSizeClass: horizontalSizeClass)
                 } detail: {
@@ -31,20 +46,13 @@ struct DashboardView: View {
                         MemosView()
                     }
                 }
+                .transition(.opacity)
+                .matchedGeometryEffect(id: "pop-up", in: namespace)
+            }
+        }
+        .animation(.easeIn, value: application.memoObject)
         .toolbar(application.memoObject == nil ? .visible : .hidden, for: .windowToolbar)
         .toolbarBackground(application.memoObject == nil ? .clear : Color(nsColor: .windowBackgroundColor), for: .windowToolbar)
-        .overlay {
-            if let memo = application.memoObject {
-                MemoView(memo: memo)
-                    .onDisappear {
-                        withPersistence(\.viewContext) { context in
-                            try context.saveIfNeeded()
-                            context.refreshAllObjects()
-                        }
-                    }
-                    .transition(.move(edge: .bottom))
-            }
-        }
         .onChange(of: columnVisibility) { oldValue, newValue in
             application.changeSidebarVisibility(newValue == .all ? .shown : .hidden)
         }

Memola/Features/Memo/Memo/MemoView.swift

@@ -61,6 +61,8 @@ struct MemoView: View {
                 loadingIndicator("Loading photo...")
             }
         }
+        .focusedSceneObject(history)
+        .focusedSceneValue(\.activeSceneKey, .memo)
     }
 
     private var canvasView: some View {

Memola/Shortcut/Commands/EditCommands.swift

@@ -8,21 +8,28 @@
 import SwiftUI
 
 struct EditCommands: Commands {
+    @FocusedValue(\.activeSceneKey) private var appScene
+
+    @FocusedObject var history: History?
+
     var body: some Commands {
         CommandGroup(replacing: .undoRedo) {
-            // memo view
+            if appScene == .memo, let history {
                 Button {
-                
+                    history.historyPublisher.send(.undo)
                 } label: {
                     Text("Undo")
                 }
                 .keyboardShortcut("z", modifiers: [.command])
+                .disabled(history.undoDisabled)
                 Button {
-                
+                    history.historyPublisher.send(.redo)
                 } label: {
                     Text("Redo")
                 }
                 .keyboardShortcut("z", modifiers: [.command, .shift])
+                .disabled(history.redoDisabled)
+            }
         }
         CommandGroup(replacing: .pasteboard) { }
     }