Scope week tests to the selected course

WeekTestView filtered decks and TestResults by weekNumber alone, so Week 3
of any course pulled content from every course's Week 3 simultaneously.
Thread courseName through the navigation destination, quiz view, and
TestResult model so quiz cards, score history, and focus-area missed items
are all scoped to the active course.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Conjuga/Conjuga/Models/TestResult.swift

@@ -9,6 +9,7 @@ struct MissedCourseItem: Codable, Hashable, Sendable {
 @Model
 final class TestResult {
     var id: String = ""
+    var courseName: String = ""
     var weekNumber: Int = 0
     var quizType: String = ""
     var totalQuestions: Int = 0
@@ -25,8 +26,9 @@ final class TestResult {
         return Int(round(Double(correctCount) / Double(totalQuestions) * 100))
     }
 
-    init(weekNumber: Int, quizType: String, totalQuestions: Int, correctCount: Int, missedItems: [MissedCourseItem]) {
+    init(courseName: String, weekNumber: Int, quizType: String, totalQuestions: Int, correctCount: Int, missedItems: [MissedCourseItem]) {
         self.id = UUID().uuidString
+        self.courseName = courseName
         self.weekNumber = weekNumber
         self.quizType = quizType
         self.totalQuestions = totalQuestions
@@ -35,8 +37,9 @@ final class TestResult {
         self.missedItems = missedItems
     }
 
-    convenience init(weekNumber: Int, quizType: String, totalQuestions: Int, correctCount: Int, missedFronts: [String], missedBacks: [String]) {
+    convenience init(courseName: String, weekNumber: Int, quizType: String, totalQuestions: Int, correctCount: Int, missedFronts: [String], missedBacks: [String]) {
         self.init(
+            courseName: courseName,
             weekNumber: weekNumber,
             quizType: quizType,
             totalQuestions: totalQuestions,

Conjuga/Conjuga/Views/Course/CourseQuizView.swift

@@ -6,6 +6,7 @@ import PencilKit
 struct CourseQuizView: View {
     let cards: [VocabCard]
     let quizType: QuizType
+    let courseName: String
     let weekNumber: Int
     let isFocusMode: Bool
 
@@ -508,6 +509,7 @@ struct CourseQuizView: View {
 
     private func saveResult() {
         let result = TestResult(
+            courseName: courseName,
             weekNumber: weekNumber,
             quizType: quizType.rawValue,
             totalQuestions: shuffledCards.count,
@@ -521,7 +523,13 @@ struct CourseQuizView: View {
 
 #Preview {
     NavigationStack {
-        CourseQuizView(cards: [], quizType: .mcEsToEn, weekNumber: 1, isFocusMode: false)
+        CourseQuizView(
+            cards: [],
+            quizType: .mcEsToEn,
+            courseName: "LanGo Spanish | Beginner I",
+            weekNumber: 1,
+            isFocusMode: false
+        )
     }
     .modelContainer(for: [TestResult.self, VocabCard.self], inMemory: true)
 }

Conjuga/Conjuga/Views/Course/CourseView.swift

@@ -31,7 +31,9 @@ struct CourseView: View {
     }
 
     private func bestScore(for week: Int) -> Int? {
-        let results = testResults.filter { $0.weekNumber == week }
+        let results = testResults.filter {
+            $0.courseName == activeCourse && $0.weekNumber == week
+        }
         guard !results.isEmpty else { return nil }
         return results.map(\.scorePercent).max()
     }
@@ -70,7 +72,7 @@ struct CourseView: View {
                     ForEach(weekGroups, id: \.week) { week, weekDecks in
                         Section {
                             // Test button
-                            NavigationLink(value: week) {
+                            NavigationLink(value: WeekTestDestination(courseName: activeCourse, weekNumber: week)) {
                                 HStack(spacing: 12) {
                                     Image(systemName: "pencil.and.list.clipboard")
                                         .font(.title3)
@@ -112,8 +114,8 @@ struct CourseView: View {
             .navigationDestination(for: CourseDeck.self) { deck in
                 DeckStudyView(deck: deck)
             }
-            .navigationDestination(for: Int.self) { week in
+            .navigationDestination(for: WeekTestDestination.self) { dest in
-                WeekTestView(weekNumber: week)
+                WeekTestView(courseName: dest.courseName, weekNumber: dest.weekNumber)
             }
         }
     }
@@ -123,6 +125,13 @@ struct CourseView: View {
     }
 }
 
+// MARK: - Navigation
+
+struct WeekTestDestination: Hashable {
+    let courseName: String
+    let weekNumber: Int
+}
+
 // MARK: - Deck Row
 
 private struct DeckRowView: View {

Conjuga/Conjuga/Views/Course/WeekTestView.swift

@@ -3,6 +3,7 @@ import SharedModels
 import SwiftData
 
 struct WeekTestView: View {
+    let courseName: String
     let weekNumber: Int
     @Environment(\.modelContext) private var modelContext
     @Environment(\.cloudModelContextProvider) private var cloudModelContextProvider
@@ -60,6 +61,7 @@ struct WeekTestView: View {
                             CourseQuizView(
                                 cards: weekCards,
                                 quizType: type,
+                                courseName: courseName,
                                 weekNumber: weekNumber,
                                 isFocusMode: false
                             )
@@ -139,6 +141,7 @@ struct WeekTestView: View {
                             CourseQuizView(
                                 cards: focusCards,
                                 quizType: .mcEsToEn,
+                                courseName: courseName,
                                 weekNumber: weekNumber,
                                 isFocusMode: true
                             )
@@ -206,7 +209,11 @@ struct WeekTestView: View {
     }
 
     private func loadCards() {
-        let weekDecks = allDecks.filter { $0.weekNumber == weekNumber && !$0.isReversed }
+        let course = courseName
+        let week = weekNumber
+        let weekDecks = allDecks.filter {
+            $0.courseName == course && $0.weekNumber == week && !$0.isReversed
+        }
         let deckIds = weekDecks.map(\.id)
         var cards: [VocabCard] = []
         for deckId in deckIds {
@@ -221,8 +228,12 @@ struct WeekTestView: View {
     }
 
     private func loadResults() {
+        let course = courseName
+        let week = weekNumber
         let descriptor = FetchDescriptor<TestResult>(
-            predicate: #Predicate<TestResult> { $0.weekNumber == weekNumber },
+            predicate: #Predicate<TestResult> {
+                $0.courseName == course && $0.weekNumber == week
+            },
             sortBy: [SortDescriptor(\TestResult.dateTaken, order: .reverse)]
         )
         weekResults = (try? cloudModelContext.fetch(descriptor)) ?? []
@@ -237,7 +248,7 @@ struct WeekTestView: View {
 
 #Preview {
     NavigationStack {
-        WeekTestView(weekNumber: 1)
+        WeekTestView(courseName: "LanGo Spanish | Beginner I", weekNumber: 1)
     }
     .modelContainer(for: [TestResult.self, CourseDeck.self, VocabCard.self], inMemory: true)
 }