Test project version recovery

Tests/MusicAssistantCoreTests/LocalSongProjectStoreTests.swift

@@ -77,6 +77,53 @@ final class LocalSongProjectStoreTests: XCTestCase {
         XCTAssertEqual(savedProject.selectedInstrumentIDs, ["oud", "violin"])
     }
 
+    func testRestoresPersistedProjectVersionAndKeepsVersionHistory() async throws {
+        let store = LocalSongProjectStore(directoryURL: temporaryDirectoryURL)
+        let restoredAt = Date(timeIntervalSince1970: 900)
+        var project = SongProject(
+            id: "version-recovery-project",
+            title: "Original Direction",
+            idea: "Start with acoustic instruments",
+            genres: [GenreStyle(id: "folk", name: "Folk")],
+            lyrics: Lyrics(text: "Original lyrics"),
+            createdAt: Date(timeIntervalSince1970: 100),
+            updatedAt: Date(timeIntervalSince1970: 200)
+        )
+
+        _ = project.createVersion(
+            id: "original-version",
+            label: "Original direction",
+            createdAt: Date(timeIntervalSince1970: 300)
+        )
+        project.title = "Later Direction"
+        project.idea = "Add electronic elements"
+        project.selectInstrument(InstrumentTrack(instrumentId: "oud"))
+        project.lyrics = Lyrics(text: "Later lyrics")
+        _ = project.createVersion(
+            id: "later-version",
+            label: "Later direction",
+            createdAt: Date(timeIntervalSince1970: 400)
+        )
+        project.title = "Unsaved direction"
+
+        try await store.create(project)
+
+        var recoveredProject = try await store.open(id: project.id)
+        XCTAssertTrue(recoveredProject.restoreVersion(id: "original-version", restoredAt: restoredAt))
+        try await store.save(recoveredProject)
+
+        let restoredProject = try await store.open(id: project.id)
+
+        XCTAssertEqual(restoredProject.title, "Original Direction")
+        XCTAssertEqual(restoredProject.idea, "Start with acoustic instruments")
+        XCTAssertEqual(restoredProject.genres, [GenreStyle(id: "folk", name: "Folk")])
+        XCTAssertTrue(restoredProject.instruments.isEmpty)
+        XCTAssertEqual(restoredProject.lyrics, Lyrics(text: "Original lyrics"))
+        XCTAssertEqual(restoredProject.updatedAt, restoredAt)
+        XCTAssertEqual(restoredProject.versions.map(\.id), ["original-version", "later-version"])
+        XCTAssertEqual(restoredProject.version(id: "later-version")?.snapshot.title, "Later Direction")
+    }
+
     func testLoadsProjectListSortedByMostRecentUpdate() async throws {
         let store = LocalSongProjectStore(directoryURL: temporaryDirectoryURL)
         let older = SongProject(

docs/TASKS.md

@@ -115,7 +115,7 @@ requirement is missing and blocks implementation, record it in
 -   [x] Add validation for contradictory/invalid project settings.
 -   [x] Add loading, offline and provider-error states.
 -   [x] Add accessibility labels and keyboard navigation.
--   [ ] Test project/version recovery.
+-   [x] Test project/version recovery.
 -   [ ] Test AI output against locked user choices.
 -   [ ] Test selected instruments influence compiled song-generation
     context.