feat: copy a note's text from the Mac menus

ios/KeepMac/KeepMacApp.swift

@@ -68,6 +68,11 @@ struct NoteCommands: Commands {
 
             Divider()
 
+            Button("Copy Text") {
+                if let note { MacPasteboard.copy(note.body) }
+            }
+            .disabled(note == nil)
+
             Button("Copy Share Link") {
                 if let note { Task { await store.copyShareLink(note) } }
             }

ios/KeepMac/MacRootView.swift

@@ -177,6 +177,7 @@ struct MacRootView: View {
                 }
             }
             Divider()
+            Button("Copy Text") { MacPasteboard.copy(note.body) }
             Button("Copy Share Link") { Task { await store.copyShareLink(note) } }
             if note.shareToken != nil {
                 Button("Stop Sharing") { Task { await store.unshare(note) } }

ios/KeepMac/ShareLink.swift

@@ -1,13 +1,19 @@
 import AppKit
 
+@MainActor
+enum MacPasteboard {
+    static func copy(_ string: String) {
+        let pasteboard = NSPasteboard.general
+        pasteboard.clearContents()
+        pasteboard.setString(string, forType: .string)
+    }
+}
+
 /// Mac-side share helper: makes sure the public link exists, then puts it on
 /// the pasteboard. Lives in the Mac target because of NSPasteboard.
 extension NotesStore {
     func copyShareLink(_ note: Note) async {
         guard let token = (await share(note))?.shareToken else { return }
-        let url = Config.baseURL.appendingPathComponent("p/\(token)")
-        let pasteboard = NSPasteboard.general
-        pasteboard.clearContents()
-        pasteboard.setString(url.absoluteString, forType: .string)
+        MacPasteboard.copy(Config.baseURL.appendingPathComponent("p/\(token)").absoluteString)
     }
 }