Add Extra Study — star cards during review, study just the marked ones

Per-week "Extra Study (N)" row appears at the end of each LanGo week
section when at least one card is marked. Cards are marked from inside
VocabFlashcardView via a star next to the speaker on reveal. Marks are
keyed by the same SHA256 hash CourseReviewCard uses, so a mark and its
SRS state describe the same logical card.

ExtraStudyMark is CloudKit-synced (private DB), with uniqueness enforced
by fetch-or-create on id since CloudKit forbids @Attribute(.unique).
Skipped for textbook courses: DeckStudyView nils out the mark context
when the deck's courseName matches a TextbookChapter, and CourseView
hides the row when the active course is a textbook — so there are no
orphan marks the user can't reach.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Conjuga/Conjuga.xcodeproj/project.pbxproj

@@ -51,6 +51,7 @@
 		6BB4B0A655E6CB6F82D81B5A /* WeekTestView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5E7EF4161C73AAC67B3A0004 /* WeekTestView.swift */; };
 		6D4A29280FDD99B8E18AF264 /* WidgetDataReader.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2889F2F81673AFF3A58A07A8 /* WidgetDataReader.swift */; };
 		6ED2AC2CAA54688161D4B920 /* SyncStatusMonitor.swift in Sources */ = {isa = PBXBuildFile; fileRef = 18CCD69C14D1B0CFBD03C92F /* SyncStatusMonitor.swift */; };
+		6F7BE3533FAF4DE1D514AA7C /* ExtraStudyView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8C6D48A27B47609BFE04C80C /* ExtraStudyView.swift */; };
 		728702D9AA7A8BDABBA62513 /* ReviewStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = CBCF6FCFA6B00151C2371E77 /* ReviewStore.swift */; };
 		760628EFE1CF191CE2FC07DC /* GuideView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8C935ECDF8A5D8D6FA541E20 /* GuideView.swift */; };
 		78FE99C5D511737B6877EDD5 /* VocabReviewView.swift in Sources */ = {isa = PBXBuildFile; fileRef = E8D95887B18216FCA71643D6 /* VocabReviewView.swift */; };
@@ -78,6 +79,7 @@
 		ABBE5080E254D1D3E3465E40 /* ConversationService.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3A96C065B8787DEC6818E497 /* ConversationService.swift */; };
 		AC0422000A8042251357FA83 /* VideoActionsView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 86A57770AAE3FAC5DCA329F9 /* VideoActionsView.swift */; };
 		ACE9D8B3116757B5D6F0F766 /* StoryGenerator.swift in Sources */ = {isa = PBXBuildFile; fileRef = 713F23A9C2935408B136C7C7 /* StoryGenerator.swift */; };
+		AE156A84B4ECDB1A4A38CE88 /* ExtraStudyStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = 221920B9BD6DC6F084093975 /* ExtraStudyStore.swift */; };
 		B09F872A18F4105ABAF6CDF3 /* DownloadedVideosView.swift in Sources */ = {isa = PBXBuildFile; fileRef = FB5F16AFB9FAF6617FDFA35D /* DownloadedVideosView.swift */; };
 		B10A324C06F0957DDE2233F8 /* TextbookChapterView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 39908548430FDF01D76201FB /* TextbookChapterView.swift */; };
 		B4603AA6EFB134794AA39BF4 /* LyricsLibraryView.swift in Sources */ = {isa = PBXBuildFile; fileRef = FC2B1F646394D7C03493F1BF /* LyricsLibraryView.swift */; };
@@ -160,6 +162,7 @@
 		1EB4830F9289AACC82D753F8 /* ConjugaApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ConjugaApp.swift; sourceTree = "<group>"; };
 		1F842EB5E566C74658D918BB /* HandwritingView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = HandwritingView.swift; sourceTree = "<group>"; };
 		20D1904DF07E0A6816134CF3 /* ListeningView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ListeningView.swift; sourceTree = "<group>"; };
+		221920B9BD6DC6F084093975 /* ExtraStudyStore.swift */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = sourcecode.swift; path = ExtraStudyStore.swift; sourceTree = "<group>"; };
 		2889F2F81673AFF3A58A07A8 /* WidgetDataReader.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WidgetDataReader.swift; sourceTree = "<group>"; };
 		2931634BEB33B93429CE254F /* VocabFlashcardView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VocabFlashcardView.swift; sourceTree = "<group>"; };
 		30EF2362D9FFF9B07A45CE6D /* StreakCalendarView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StreakCalendarView.swift; sourceTree = "<group>"; };
@@ -212,6 +215,7 @@
 		854EA2A8D6CF203958BA3C24 /* TextbookExerciseView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TextbookExerciseView.swift; sourceTree = "<group>"; };
 		86A57770AAE3FAC5DCA329F9 /* VideoActionsView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VideoActionsView.swift; sourceTree = "<group>"; };
 		8C2D88FF9A3B0590B22C7837 /* conjuga_data.json */ = {isa = PBXFileReference; lastKnownFileType = text.json; path = conjuga_data.json; sourceTree = "<group>"; };
+		8C6D48A27B47609BFE04C80C /* ExtraStudyView.swift */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = sourcecode.swift; path = ExtraStudyView.swift; sourceTree = "<group>"; };
 		8C935ECDF8A5D8D6FA541E20 /* GuideView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GuideView.swift; sourceTree = "<group>"; };
 		8E9BCDBB9BC24F5C8117767E /* WordOfDayWidget.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WordOfDayWidget.swift; sourceTree = "<group>"; };
 		940826D9ED5C18D2C4E7B2C7 /* ReflexiveVerbStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ReflexiveVerbStore.swift; sourceTree = "<group>"; };
@@ -339,6 +343,7 @@
 				51FA0182FB27A06FFC703138 /* VideoDownloadService.swift */,
 				D570252DA3DCDD9217C71863 /* WidgetDataService.swift */,
 				AFF65B05E7CEC386F121973E /* YouTubeVideoStore.swift */,
+				221920B9BD6DC6F084093975 /* ExtraStudyStore.swift */,
 			);
 			path = Services;
 			sourceTree = "<group>";
@@ -515,6 +520,7 @@
 				854EA2A8D6CF203958BA3C24 /* TextbookExerciseView.swift */,
 				2931634BEB33B93429CE254F /* VocabFlashcardView.swift */,
 				5E7EF4161C73AAC67B3A0004 /* WeekTestView.swift */,
+				8C6D48A27B47609BFE04C80C /* ExtraStudyView.swift */,
 			);
 			path = Course;
 			sourceTree = "<group>";
@@ -733,6 +739,8 @@
 				6BB4B0A655E6CB6F82D81B5A /* WeekTestView.swift in Sources */,
 				E99473B7DF9BCAE150E9D1E1 /* WidgetDataService.swift in Sources */,
 				05D825674F6508D6D12D2156 /* YouTubeVideoStore.swift in Sources */,
+				AE156A84B4ECDB1A4A38CE88 /* ExtraStudyStore.swift in Sources */,
+				6F7BE3533FAF4DE1D514AA7C /* ExtraStudyView.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

Conjuga/Conjuga/ConjugaApp.swift

@@ -72,14 +72,14 @@ struct ConjugaApp: App {
                 schema: Schema([
                     ReviewCard.self, CourseReviewCard.self, UserProgress.self,
                     TestResult.self, DailyLog.self, SavedSong.self, Story.self, Conversation.self,
-                    TextbookExerciseAttempt.self,
+                    TextbookExerciseAttempt.self, ExtraStudyMark.self,
                 ]),
                 cloudKitDatabase: .private("iCloud.com.conjuga.app")
             )
             cloudContainer = try ModelContainer(
                 for: ReviewCard.self, CourseReviewCard.self, UserProgress.self,
                      TestResult.self, DailyLog.self, SavedSong.self, Story.self, Conversation.self,
-                     TextbookExerciseAttempt.self,
+                     TextbookExerciseAttempt.self, ExtraStudyMark.self,
                 configurations: cloudConfig
             )
 

Conjuga/Conjuga/Services/ExtraStudyStore.swift

@@ -0,0 +1,88 @@
+import Foundation
+import SharedModels
+import SwiftData
+
+/// Cloud-context CRUD for `ExtraStudyMark`. Uniqueness is enforced in code via
+/// fetch-or-create on `id` (CloudKit forbids `@Attribute(.unique)`).
+struct ExtraStudyStore {
+    let context: ModelContext
+
+    private func fetchMark(id: String) -> ExtraStudyMark? {
+        let descriptor = FetchDescriptor<ExtraStudyMark>(
+            predicate: #Predicate<ExtraStudyMark> { $0.id == id }
+        )
+        return (try? context.fetch(descriptor))?.first
+    }
+
+    func contains(card: VocabCard) -> Bool {
+        fetchMark(id: CourseCardStore.reviewKey(for: card)) != nil
+    }
+
+    /// Toggle a mark for the given card. Returns the new "is marked" state.
+    @discardableResult
+    func toggle(
+        card: VocabCard,
+        courseName: String,
+        weekNumber: Int
+    ) -> Bool {
+        let id = CourseCardStore.reviewKey(for: card)
+        if let existing = fetchMark(id: id) {
+            context.delete(existing)
+            try? context.save()
+            return false
+        }
+        let mark = ExtraStudyMark(
+            id: id,
+            deckId: card.deckId,
+            courseName: courseName,
+            weekNumber: weekNumber,
+            front: card.front,
+            back: card.back
+        )
+        context.insert(mark)
+        try? context.save()
+        return true
+    }
+
+    func count(courseName: String, weekNumber: Int) -> Int {
+        let descriptor = FetchDescriptor<ExtraStudyMark>(
+            predicate: #Predicate<ExtraStudyMark> {
+                $0.courseName == courseName && $0.weekNumber == weekNumber
+            }
+        )
+        return (try? context.fetchCount(descriptor)) ?? 0
+    }
+
+    func countsByWeek(courseName: String) -> [Int: Int] {
+        let descriptor = FetchDescriptor<ExtraStudyMark>(
+            predicate: #Predicate<ExtraStudyMark> { $0.courseName == courseName }
+        )
+        let marks = (try? context.fetch(descriptor)) ?? []
+        var counts: [Int: Int] = [:]
+        for mark in marks {
+            counts[mark.weekNumber, default: 0] += 1
+        }
+        return counts
+    }
+
+    func fetch(courseName: String, weekNumber: Int) -> [ExtraStudyMark] {
+        let descriptor = FetchDescriptor<ExtraStudyMark>(
+            predicate: #Predicate<ExtraStudyMark> {
+                $0.courseName == courseName && $0.weekNumber == weekNumber
+            },
+            sortBy: [SortDescriptor(\.markedAt)]
+        )
+        return (try? context.fetch(descriptor)) ?? []
+    }
+
+    func fetchIds(courseName: String, weekNumber: Int) -> Set<String> {
+        Set(fetch(courseName: courseName, weekNumber: weekNumber).map(\.id))
+    }
+}
+
+/// Lightweight context passed to `VocabFlashcardView` so the in-session star
+/// button knows which week/course to attribute a mark to.
+struct ExtraStudyMarkContext: Equatable {
+    let courseName: String
+    let weekNumber: Int
+}

Conjuga/Conjuga/Views/Course/CourseView.swift

@@ -8,11 +8,16 @@ struct CourseView: View {
     @Query(sort: \TextbookChapter.number) private var textbookChapters: [TextbookChapter]
     @AppStorage("selectedCourse") private var selectedCourse: String?
     @State private var testResults: [TestResult] = []
+    @State private var extraStudyCounts: [Int: Int] = [:]
 
     private var textbookCourses: [String] {
         Array(Set(textbookChapters.map(\.courseName))).sorted()
     }
 
+    private var activeCourseIsTextbook: Bool {
+        textbookCourses.contains(activeCourse)
+    }
+
     private var cloudModelContext: ModelContext { cloudModelContextProvider() }
 
     private var courseNames: [String] {
@@ -169,6 +174,28 @@ struct CourseView: View {
                                     }
                                 }
                             }
+
+                            // Extra Study row — only when there are marks for this week
+                            if !activeCourseIsTextbook, let markCount = extraStudyCounts[week], markCount > 0 {
+                                NavigationLink(value: ExtraStudyDestination(courseName: activeCourse, weekNumber: week)) {
+                                    HStack(spacing: 12) {
+                                        Image(systemName: "star.fill")
+                                            .font(.title3)
+                                            .foregroundStyle(.yellow)
+                                            .frame(width: 32)
+
+                                        VStack(alignment: .leading, spacing: 2) {
+                                            Text("Extra Study")
+                                                .font(.subheadline.weight(.semibold))
+                                            Text("\(markCount) marked card\(markCount == 1 ? "" : "s")")
+                                                .font(.caption)
+                                                .foregroundStyle(.secondary)
+                                        }
+
+                                        Spacer()
+                                    }
+                                }
+                            }
                         } header: {
                             Text("Week \(week)")
                         }
@@ -176,10 +203,19 @@ struct CourseView: View {
                 }
             }
             .navigationTitle(shortName(activeCourse).isEmpty ? "Course" : shortName(activeCourse))
-            .onAppear(perform: loadTestResults)
+            .onAppear {
+                loadTestResults()
+                loadExtraStudyCounts()
+            }
+            .onChange(of: activeCourse) { _, _ in
+                loadExtraStudyCounts()
+            }
             .navigationDestination(for: CourseDeck.self) { deck in
                 DeckStudyView(deck: deck)
             }
+            .navigationDestination(for: ExtraStudyDestination.self) { dest in
+                ExtraStudyView(courseName: dest.courseName, weekNumber: dest.weekNumber)
+            }
             .navigationDestination(for: WeekTestDestination.self) { dest in
                 WeekTestView(courseName: dest.courseName, weekNumber: dest.weekNumber)
             }
@@ -210,6 +246,12 @@ struct CourseView: View {
     private func loadTestResults() {
         testResults = (try? cloudModelContext.fetch(FetchDescriptor<TestResult>())) ?? []
     }
+
+    private func loadExtraStudyCounts() {
+        guard !activeCourse.isEmpty else { return }
+        extraStudyCounts = ExtraStudyStore(context: cloudModelContext)
+            .countsByWeek(courseName: activeCourse)
+    }
 }
 
 // MARK: - Navigation
@@ -228,6 +270,11 @@ struct TextbookDestination: Hashable {
     let courseName: String
 }
 
+struct ExtraStudyDestination: Hashable {
+    let courseName: String
+    let weekNumber: Int
+}
+
 // MARK: - Deck Row
 
 private struct DeckRowView: View {

Conjuga/Conjuga/Views/Course/DeckStudyView.swift

@@ -6,6 +6,7 @@ struct DeckStudyView: View {
     let deck: CourseDeck
     @Environment(\.modelContext) private var modelContext
     @Environment(\.cloudModelContextProvider) private var cloudModelContextProvider
+    @Query private var textbookChapters: [TextbookChapter]
     private var cloudModelContext: ModelContext { cloudModelContextProvider() }
     @State private var isStudying = false
     @State private var speechService = SpeechService()
@@ -16,6 +17,18 @@ struct DeckStudyView: View {
         deck.title.localizedCaseInsensitiveContains("stem changing")
     }
 
+    private var isTextbookDeck: Bool {
+        textbookChapters.contains { $0.courseName == deck.courseName }
+    }
+
+    private var markContext: ExtraStudyMarkContext? {
+        guard !isTextbookDeck else { return nil }
+        return ExtraStudyMarkContext(
+            courseName: deck.courseName,
+            weekNumber: deck.weekNumber
+        )
+    }
+
     var body: some View {
         cardListView
             .navigationTitle(deck.title)
@@ -30,7 +43,8 @@ struct DeckStudyView: View {
                             ReviewStore.recordActivity(context: cloudModelContext)
                             isStudying = false
                         },
-                        deckTitle: deck.title
+                        deckTitle: deck.title,
+                        markContext: markContext
                     )
                     .toolbar {
                         ToolbarItem(placement: .cancellationAction) {

Conjuga/Conjuga/Views/Course/ExtraStudyView.swift

@@ -0,0 +1,75 @@
+import SwiftUI
+import SharedModels
+import SwiftData
+
+/// Study session containing only cards the user has marked for extra study,
+/// scoped to a specific (courseName, weekNumber). Resolves marks by re-hashing
+/// each VocabCard via `CourseCardStore.reviewKey` so the matching is robust to
+/// duplicate (deckId, front, back) tuples that differ in examples.
+struct ExtraStudyView: View {
+    let courseName: String
+    let weekNumber: Int
+
+    @Environment(\.modelContext) private var localContext
+    @Environment(\.cloudModelContextProvider) private var cloudModelContextProvider
+    @Environment(\.dismiss) private var dismiss
+
+    @State private var cards: [VocabCard] = []
+    @State private var speechService = SpeechService()
+    @State private var loaded = false
+
+    private var cloudContext: ModelContext { cloudModelContextProvider() }
+
+    var body: some View {
+        Group {
+            if !loaded {
+                ProgressView()
+                    .controlSize(.large)
+            } else if cards.isEmpty {
+                ContentUnavailableView(
+                    "No Marked Cards",
+                    systemImage: "star",
+                    description: Text("Tap the star on a card during study to add it here.")
+                )
+            } else {
+                VocabFlashcardView(
+                    cards: cards.shuffled(),
+                    speechService: speechService,
+                    onDone: {
+                        ReviewStore.recordActivity(context: cloudContext)
+                        dismiss()
+                    },
+                    deckTitle: "Extra Study",
+                    markContext: ExtraStudyMarkContext(
+                        courseName: courseName,
+                        weekNumber: weekNumber
+                    )
+                )
+            }
+        }
+        .navigationTitle("Extra Study · Week \(weekNumber)")
+        .navigationBarTitleDisplayMode(.inline)
+        .task { load() }
+    }
+
+    private func load() {
+        guard !loaded else { return }
+        let marks = ExtraStudyStore(context: cloudContext)
+            .fetch(courseName: courseName, weekNumber: weekNumber)
+        let markIds = Set(marks.map(\.id))
+        let deckIds = Set(marks.map(\.deckId))
+
+        var collected: [VocabCard] = []
+        for deckId in deckIds {
+            let descriptor = FetchDescriptor<VocabCard>(
+                predicate: #Predicate<VocabCard> { $0.deckId == deckId }
+            )
+            let deckCards = (try? localContext.fetch(descriptor)) ?? []
+            collected.append(contentsOf: deckCards.filter {
+                markIds.contains(CourseCardStore.reviewKey(for: $0))
+            })
+        }
+        cards = collected
+        loaded = true
+    }
+}

Conjuga/Conjuga/Views/Course/VocabFlashcardView.swift

@@ -9,12 +9,16 @@ struct VocabFlashcardView: View {
     /// Optional deck context — when present and the title indicates a stem-
     /// changing deck, each card gets an inline conjugation toggle.
     var deckTitle: String? = nil
+    /// When set, a star button appears next to the speaker on reveal so the
+    /// user can mark the card for extra study.
+    var markContext: ExtraStudyMarkContext? = nil
 
     @Environment(\.cloudModelContextProvider) private var cloudModelContextProvider
     @State private var currentIndex = 0
     @State private var isRevealed = false
     @State private var sessionCorrect = 0
     @State private var showConjugation = false
+    @State private var markedIds: Set<String> = []
 
     private var isStemChangingDeck: Bool {
         (deckTitle ?? "").localizedCaseInsensitiveContains("stem changing")
@@ -61,14 +65,29 @@ struct VocabFlashcardView: View {
                                     .font(.title.weight(.medium))
                                     .multilineTextAlignment(.center)
 
-                                Button {
+                                HStack(spacing: 12) {
-                                    speechService.speak(card.front)
+                                    Button {
-                                } label: {
+                                        speechService.speak(card.front)
-                                    Image(systemName: "speaker.wave.2.fill")
+                                    } label: {
-                                        .font(.title3)
+                                        Image(systemName: "speaker.wave.2.fill")
-                                        .padding(12)
+                                            .font(.title3)
+                                            .padding(12)
+                                    }
+                                    .glassEffect(in: .circle)
+
+                                    if markContext != nil {
+                                        Button {
+                                            toggleMark()
+                                        } label: {
+                                            Image(systemName: currentIsMarked ? "star.fill" : "star")
+                                                .font(.title3)
+                                                .padding(12)
+                                                .foregroundStyle(currentIsMarked ? .yellow : .secondary)
+                                        }
+                                        .glassEffect(in: .circle)
+                                        .accessibilityLabel(currentIsMarked ? "Unmark for extra study" : "Mark for extra study")
+                                    }
                                 }
-                                .glassEffect(in: .circle)
 
                                 if isStemChangingDeck {
                                     Button {
@@ -194,6 +213,34 @@ struct VocabFlashcardView: View {
         }
         .animation(.smooth, value: isRevealed)
         .animation(.smooth, value: currentIndex)
+        .task { loadMarks() }
+    }
+
+    private var currentIsMarked: Bool {
+        guard let card = currentCard else { return false }
+        return markedIds.contains(CourseCardStore.reviewKey(for: card))
+    }
+
+    private func loadMarks() {
+        guard let ctx = markContext else { return }
+        markedIds = ExtraStudyStore(context: cloudModelContext)
+            .fetchIds(courseName: ctx.courseName, weekNumber: ctx.weekNumber)
+    }
+
+    private func toggleMark() {
+        guard let card = currentCard, let ctx = markContext else { return }
+        let store = ExtraStudyStore(context: cloudModelContext)
+        let isNowMarked = store.toggle(
+            card: card,
+            courseName: ctx.courseName,
+            weekNumber: ctx.weekNumber
+        )
+        let key = CourseCardStore.reviewKey(for: card)
+        if isNowMarked {
+            markedIds.insert(key)
+        } else {
+            markedIds.remove(key)
+        }
     }
 
     private func ratingButton(_ label: String, color: Color, quality: ReviewQuality) -> some View {

Conjuga/SharedModels/Sources/SharedModels/ExtraStudyMark.swift

@@ -0,0 +1,44 @@
+import Foundation
+import SwiftData
+
+/// User mark on a vocab card for "extra study" focus. Cloud-synced so the set
+/// follows the user across devices. Denormalises card identity (deckId/front/
+/// back) so the Course tab can resolve a marked-cards view without joining
+/// against the local-only `VocabCard` store.
+///
+/// CloudKit forbids `@Attribute(.unique)`, so callers must fetch-or-create
+/// by `id` to maintain uniqueness in code.
+@Model
+public final class ExtraStudyMark {
+    /// Stable hash of (deckId, front, back, examplesES, examplesEN). Same
+    /// shape as `CourseCardStore.reviewKey(for:)` so a mark and a review
+    /// card describe the same logical card.
+    public var id: String = ""
+
+    public var deckId: String = ""
+    public var courseName: String = ""
+    public var weekNumber: Int = 0
+
+    public var front: String = ""
+    public var back: String = ""
+
+    public var markedAt: Date = Date()
+
+    public init(
+        id: String,
+        deckId: String,
+        courseName: String,
+        weekNumber: Int,
+        front: String,
+        back: String,
+        markedAt: Date = Date()
+    ) {
+        self.id = id
+        self.deckId = deckId
+        self.courseName = courseName
+        self.weekNumber = weekNumber
+        self.front = front
+        self.back = back
+        self.markedAt = markedAt
+    }
+}