Fix lyrics wiped on schema reset by moving SavedSong to cloud container

SavedSong was in the local container alongside reference data, so it
got deleted whenever localStoreResetVersion was bumped. Move it to the
cloud container (CloudKit-synced) so saved songs persist across schema
changes. Update lyrics views to use cloudModelContextProvider.

Closes #4

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

Conjuga/Conjuga/ConjugaApp.swift

@@ -10,7 +10,7 @@ private enum CloudPreviewContainer {
         let configuration = ModelConfiguration(isStoredInMemoryOnly: true)
         return try! ModelContainer(
             for: ReviewCard.self, CourseReviewCard.self, UserProgress.self,
-                 TestResult.self, DailyLog.self,
+                 TestResult.self, DailyLog.self, SavedSong.self,
             configurations: configuration
         )
     }()
@@ -67,13 +67,13 @@ struct ConjugaApp: App {
                 "cloud",
                 schema: Schema([
                     ReviewCard.self, CourseReviewCard.self, UserProgress.self,
-                    TestResult.self, DailyLog.self,
+                    TestResult.self, DailyLog.self, SavedSong.self,
                 ]),
                 cloudKitDatabase: .private("iCloud.com.conjuga.app")
             )
             cloudContainer = try ModelContainer(
                 for: ReviewCard.self, CourseReviewCard.self, UserProgress.self,
-                     TestResult.self, DailyLog.self,
+                     TestResult.self, DailyLog.self, SavedSong.self,
                 configurations: cloudConfig
             )
         } catch {
@@ -200,7 +200,6 @@ struct ConjugaApp: App {
             schema: Schema([
                 Verb.self, VerbForm.self, IrregularSpan.self,
                 TenseGuide.self, CourseDeck.self, VocabCard.self,
-                SavedSong.self,
             ]),
             url: url,
             cloudKitDatabase: .none
@@ -208,7 +207,6 @@ struct ConjugaApp: App {
         return try ModelContainer(
             for: Verb.self, VerbForm.self, IrregularSpan.self,
                  TenseGuide.self, CourseDeck.self, VocabCard.self,
-                 SavedSong.self,
             configurations: localConfig
         )
     }
@@ -237,7 +235,7 @@ struct ConjugaApp: App {
     /// Clears accumulated stale schema metadata from previous container configurations.
     /// Bump the version number to force another reset if the schema changes again.
     private static func performOneTimeLocalStoreResetIfNeeded(at url: URL) {
-        let resetVersion = 2  // bump: widget schema moved to SharedModels
+        let resetVersion = 3  // bump: SavedSong moved to cloud container
         let key = "localStoreResetVersion"
         let defaults = UserDefaults.standard
 

Conjuga/Conjuga/Views/Practice/Lyrics/LyricsConfirmationView.swift

@@ -7,9 +7,11 @@ struct LyricsConfirmationView: View {
     let result: LyricsSearchResult
     let onSave: () -> Void
 
-    @Environment(\.modelContext) private var modelContext
+    @Environment(\.cloudModelContextProvider) private var cloudModelContextProvider
     @Environment(\.dismiss) private var dismiss
 
+    private var cloudModelContext: ModelContext { cloudModelContextProvider() }
+
     @State private var translatedEN = ""
     @State private var isTranslating = true
     @State private var translationError = false
@@ -207,8 +209,8 @@ struct LyricsConfirmationView: View {
             albumArtURL: result.albumArtURL ?? "",
             appleMusicURL: result.appleMusicURL ?? ""
         )
-        modelContext.insert(song)
+        cloudModelContext.insert(song)
-        try? modelContext.save()
+        try? cloudModelContext.save()
         onSave()
     }
 }

Conjuga/Conjuga/Views/Practice/Lyrics/LyricsLibraryView.swift

@@ -3,9 +3,12 @@ import SharedModels
 import SwiftData
 
 struct LyricsLibraryView: View {
-    @Query(sort: \SavedSong.savedDate, order: .reverse) private var songs: [SavedSong]
+    @Environment(\.cloudModelContextProvider) private var cloudModelContextProvider
+    @State private var songs: [SavedSong] = []
     @State private var showingSearch = false
 
+    private var cloudModelContext: ModelContext { cloudModelContextProvider() }
+
     var body: some View {
         Group {
             if songs.isEmpty {
@@ -42,18 +45,26 @@ struct LyricsLibraryView: View {
             NavigationStack {
                 LyricsSearchView {
                     showingSearch = false
+                    loadSongs()
                 }
             }
         }
+        .onAppear(perform: loadSongs)
     }
 
-    @Environment(\.modelContext) private var modelContext
+    private func loadSongs() {
+        let descriptor = FetchDescriptor<SavedSong>(
+            sortBy: [SortDescriptor(\SavedSong.savedDate, order: .reverse)]
+        )
+        songs = (try? cloudModelContext.fetch(descriptor)) ?? []
+    }
 
     private func deleteSongs(at offsets: IndexSet) {
         for index in offsets {
-            modelContext.delete(songs[index])
+            cloudModelContext.delete(songs[index])
         }
-        try? modelContext.save()
+        try? cloudModelContext.save()
+        loadSongs()
     }
 }