Add menu bar copy last transcription

VoiceInk/Services/LastTranscriptionService.swift

@@ -0,0 +1,48 @@
+import Foundation
+import SwiftData
+
+class LastTranscriptionService: ObservableObject {
+    
+    static func getLastTranscription(from modelContext: ModelContext) -> Transcription? {
+        var descriptor = FetchDescriptor<Transcription>(
+            sortBy: [SortDescriptor(\.timestamp, order: .reverse)]
+        )
+        descriptor.fetchLimit = 1
+        
+        do {
+            let transcriptions = try modelContext.fetch(descriptor)
+            return transcriptions.first
+        } catch {
+            print("Error fetching last transcription: \(error)")
+            return nil
+        }
+    }
+    
+    static func copyLastTranscription(from modelContext: ModelContext) {
+        guard let lastTranscription = getLastTranscription(from: modelContext) else {
+            Task { @MainActor in
+                NotificationManager.shared.showNotification(
+                    title: "No transcription available",
+                    type: .error
+                )
+            }
+            return
+        }
+        
+        let success = ClipboardManager.copyToClipboard(lastTranscription.text)
+        
+        Task { @MainActor in
+            if success {
+                NotificationManager.shared.showNotification(
+                    title: "Last transcription copied",
+                    type: .success
+                )
+            } else {
+                NotificationManager.shared.showNotification(
+                    title: "Failed to copy transcription",
+                    type: .error
+                )
+            }
+        }
+    }
+} 

VoiceInk/Views/MenuBarView.swift

@@ -159,6 +159,10 @@ struct MenuBarView: View {
             
             Divider()
             
+            Button("Copy Last Transcription") {
+                LastTranscriptionService.copyLastTranscription(from: whisperState.modelContext)
+            }
+            
             Button("History") {
                 menuBarManager.openMainWindowAndNavigate(to: "History")
             }