fix crash on stop recording

- Remove #Predicate with local variable capture (known SwiftData crash)
- Explicitly insert VoiceMemo into context before relationship assignment
- Save context before starting async transcription
- Extract audioURL before Task boundary to avoid cross-context access

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

VoiceDiary/ViewModels/RecordingViewModel.swift

@@ -40,25 +40,27 @@ final class RecordingViewModel {
 			audioFileName: result.url.lastPathComponent,
 			duration: result.duration
 		)
+		context.insert(memo)
+		memo.entry = entry
 		entry.memos.append(memo)
 		entry.updatedAt = .now
 
+		try? context.save()
+
+		let audioURL = memo.audioURL
 		Task {
-			await transcribeMemo(memo, context: context)
+			await transcribeMemo(memo, audioURL: audioURL)
 		}
 	}
 
 	private func fetchOrCreateEntry(for date: Date, context: ModelContext) -> DiaryEntry {
-		let startOfDay = Calendar.current.startOfDay(for: date)
-		let endOfDay = Calendar.current.date(byAdding: .day, value: 1, to: startOfDay)!
+		let descriptor = FetchDescriptor<DiaryEntry>()
 
-		var descriptor = FetchDescriptor<DiaryEntry>(
-			predicate: #Predicate { $0.date >= startOfDay && $0.date < endOfDay }
-		)
-		descriptor.fetchLimit = 1
-
-		if let existing = try? context.fetch(descriptor).first {
-			return existing
+		if let entries = try? context.fetch(descriptor) {
+			let match = entries.first { entry in
+				Calendar.current.isDate(entry.date, inSameDayAs: date)
+			}
+			if let match { return match }
 		}
 
 		let entry = DiaryEntry(date: date)
@@ -66,7 +68,7 @@ final class RecordingViewModel {
 		return entry
 	}
 
-	private func transcribeMemo(_ memo: VoiceMemo, context: ModelContext) async {
+	private func transcribeMemo(_ memo: VoiceMemo, audioURL: URL) async {
 		if transcriptionService.authorizationStatus == .notDetermined {
 			await transcriptionService.requestAuthorization()
 		}
@@ -76,13 +78,14 @@ final class RecordingViewModel {
 		}
 
 		memo.isTranscribing = true
-		defer { memo.isTranscribing = false }
 
 		do {
-			let transcript = try await transcriptionService.transcribe(audioURL: memo.audioURL)
+			let transcript = try await transcriptionService.transcribe(audioURL: audioURL)
 			memo.transcript = transcript
+			memo.isTranscribing = false
 			memo.entry?.updatedAt = .now
 		} catch {
+			memo.isTranscribing = false
 			self.error = error
 		}
 	}