fix speech authorization crash: decouple from SwiftData context

- Make TranscriptionService a plain Sendable class (not @Observable/@MainActor)
- Request speech authorization in ContentView.onAppear via callback (no async)
- Use @State pendingMemo + Task in View for transcription (Swift 6 safe)
- Separate saveRecording() and startTranscription() to avoid data races

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

VoiceDiary.xcodeproj/project.pbxproj

@@ -20,6 +20,7 @@
 		BE246B75520F6505EFE3015E /* VoiceDiaryTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2CAFA3F05939B94F1CFD372C /* VoiceDiaryTests.swift */; };
 		D5E3C103027212BE7607EF81 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 989E1C6DD70521684A5CB77F /* ContentView.swift */; };
 		D737FC41C749185F28943A87 /* DiaryEntryView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D4CCBA3B214071BEDD37CB6E /* DiaryEntryView.swift */; };
+		DB046641C4508472DAC45A51 /* SpeechAuthorization.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0292E37072DDFA0AD07EC9A3 /* SpeechAuthorization.swift */; };
 		EAE61B25765D355723F9EC66 /* TranscriptionService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9CD664C8607AD9DC37A6C8D1 /* TranscriptionService.swift */; };
 /* End PBXBuildFile section */
 
@@ -34,6 +35,7 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		0292E37072DDFA0AD07EC9A3 /* SpeechAuthorization.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SpeechAuthorization.swift; sourceTree = "<group>"; };
 		0A2739861476DDD2140B3BA6 /* Localizable.xcstrings */ = {isa = PBXFileReference; lastKnownFileType = text.json.xcstrings; path = Localizable.xcstrings; sourceTree = "<group>"; };
 		19E99B8436E44AEC9EC5DB77 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		1CA6B754AFDFDAF2C8AF9C01 /* VoiceDiaryTests.xctest */ = {isa = PBXFileReference; includeInIndex = 0; lastKnownFileType = wrapper.cfbundle; path = VoiceDiaryTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -65,6 +67,7 @@
 			isa = PBXGroup;
 			children = (
 				F30F8103F5AEAC26F1412FEC /* AudioRecorderService.swift */,
+				0292E37072DDFA0AD07EC9A3 /* SpeechAuthorization.swift */,
 				BE004D539240AD09CEDA1897 /* SummarizationService.swift */,
 				9CD664C8607AD9DC37A6C8D1 /* TranscriptionService.swift */,
 			);
@@ -261,6 +264,7 @@
 				AFE8973BC11AC7137979D5C7 /* DiaryViewModel.swift in Sources */,
 				A791D92368773881E7ECE4F6 /* RecordingView.swift in Sources */,
 				978F1E53817BC842580C9C67 /* RecordingViewModel.swift in Sources */,
+				DB046641C4508472DAC45A51 /* SpeechAuthorization.swift in Sources */,
 				247387A3DB126648ABFA452E /* SummarizationService.swift in Sources */,
 				EAE61B25765D355723F9EC66 /* TranscriptionService.swift in Sources */,
 				5BC279CA41E44E646F2DB639 /* VoiceDiaryApp.swift in Sources */,

VoiceDiary/Services/SpeechAuthorization.swift

@@ -0,0 +1,18 @@
+import Speech
+
+enum SpeechAuthorization {
+	static func requestIfNeeded(completion: @MainActor @escaping @Sendable (Bool) -> Void) {
+		let status = SFSpeechRecognizer.authorizationStatus()
+		if status == .notDetermined {
+			SFSpeechRecognizer.requestAuthorization { newStatus in
+				Task { @MainActor in
+					completion(newStatus == .authorized)
+				}
+			}
+		} else {
+			Task { @MainActor in
+				completion(status == .authorized)
+			}
+		}
+	}
+}

VoiceDiary/Services/TranscriptionService.swift

@@ -1,15 +1,9 @@
 import Foundation
 import Speech
 
-@Observable
-@MainActor
-final class TranscriptionService {
-	var authorizationStatus: SFSpeechRecognizerAuthorizationStatus = .notDetermined
-
-	private let speechRecognizer = SFSpeechRecognizer(locale: Locale(identifier: "de-DE"))
-
-	func requestAuthorization() async {
-		authorizationStatus = await withCheckedContinuation { continuation in
+final class TranscriptionService: Sendable {
+	func requestAuthorization() async -> SFSpeechRecognizerAuthorizationStatus {
+		await withCheckedContinuation { continuation in
 			SFSpeechRecognizer.requestAuthorization { status in
 				continuation.resume(returning: status)
 			}
@@ -17,7 +11,9 @@ final class TranscriptionService {
 	}
 
 	func transcribe(audioURL: URL) async throws -> String {
-		guard let speechRecognizer, speechRecognizer.isAvailable else {
+		let recognizer = SFSpeechRecognizer(locale: Locale(identifier: "de-DE"))
+
+		guard let recognizer, recognizer.isAvailable else {
 			throw TranscriptionError.recognizerUnavailable
 		}
 
@@ -26,8 +22,8 @@ final class TranscriptionService {
 		request.shouldReportPartialResults = false
 		request.addsPunctuation = true
 
-		let transcription: String = try await withCheckedThrowingContinuation { continuation in
-			speechRecognizer.recognitionTask(with: request) { result, error in
+		return try await withCheckedThrowingContinuation { continuation in
+			recognizer.recognitionTask(with: request) { result, error in
 				if let error {
 					continuation.resume(throwing: error)
 				} else if let result, result.isFinal {
@@ -35,7 +31,6 @@ final class TranscriptionService {
 				}
 			}
 		}
-		return transcription
 	}
 }
 

VoiceDiary/Views/ContentView.swift

@@ -7,6 +7,7 @@ struct ContentView: View {
 	@State private var recordingViewModel = RecordingViewModel()
 	@State private var diaryViewModel = DiaryViewModel()
 	@State private var showingRecording = false
+	@State private var speechAuthorized = false
 
 	var body: some View {
 		NavigationStack {
@@ -34,6 +35,11 @@ struct ContentView: View {
 			}
 		}
 		.environment(diaryViewModel)
+		.onAppear {
+			SpeechAuthorization.requestIfNeeded { authorized in
+				speechAuthorized = authorized
+			}
+		}
 	}
 
 	private var emptyState: some View {

VoiceDiary/Views/RecordingView.swift

@@ -5,8 +5,11 @@ struct RecordingView: View {
 	@Environment(\.modelContext) private var modelContext
 	@Environment(\.dismiss) private var dismiss
 	var viewModel: RecordingViewModel
-	@State private var transcriptionService = TranscriptionService()
 	@State private var isTranscribing = false
+	@State private var transcriptionError: Error?
+	@State private var pendingMemo: VoiceMemo?
+
+	private let transcriptionService = TranscriptionService()
 
 	var body: some View {
 		NavigationStack {
@@ -29,7 +32,7 @@ struct RecordingView: View {
 
 				Spacer()
 
-				if let error = viewModel.error {
+				if let error = viewModel.error ?? transcriptionError {
 					Text(error.localizedDescription)
 						.font(.caption)
 						.foregroundStyle(.red)
@@ -45,18 +48,13 @@ struct RecordingView: View {
 					Button(String(localized: "general.done")) {
 						if viewModel.isRecording {
 							viewModel.stopRecording()
-							saveAndTranscribe()
+							saveRecording()
 						}
 						dismiss()
 					}
 				}
 			}
 		}
-		.task {
-			if transcriptionService.authorizationStatus == .notDetermined {
-				await transcriptionService.requestAuthorization()
-			}
-		}
 	}
 
 	private var timerDisplay: some View {
@@ -72,7 +70,8 @@ struct RecordingView: View {
 		Button {
 			if viewModel.isRecording {
 				viewModel.stopRecording()
-				saveAndTranscribe()
+				saveRecording()
+				startTranscription()
 			} else {
 				viewModel.startRecording()
 			}
@@ -102,7 +101,7 @@ struct RecordingView: View {
 		.sensoryFeedback(.impact, trigger: viewModel.isRecording)
 	}
 
-	private func saveAndTranscribe() {
+	private func saveRecording() {
 		guard let recorded = viewModel.lastRecordedFile else { return }
 
 		let today = Calendar.current.startOfDay(for: .now)
@@ -112,24 +111,25 @@ struct RecordingView: View {
 		memo.entry = entry
 		modelContext.insert(memo)
 		viewModel.lastRecordedFile = nil
-
-		let audioURL = recorded.url
-		Task {
-			await transcribe(memo: memo, audioURL: audioURL)
-		}
+		pendingMemo = memo
 	}
 
-	private func transcribe(memo: VoiceMemo, audioURL: URL) async {
-		guard transcriptionService.authorizationStatus == .authorized else { return }
+	private func startTranscription() {
+		guard let memo = pendingMemo else { return }
+		let audioURL = memo.audioURL
 
 		isTranscribing = true
-		defer { isTranscribing = false }
+		transcriptionError = nil
 
-		do {
-			let transcript = try await transcriptionService.transcribe(audioURL: audioURL)
-			memo.transcript = transcript
-		} catch {
-			viewModel.error = error
+		Task {
+			do {
+				let transcript = try await transcriptionService.transcribe(audioURL: audioURL)
+				memo.transcript = transcript
+			} catch {
+				transcriptionError = error
+			}
+			isTranscribing = false
+			pendingMemo = nil
 		}
 	}