Enforce user locks for AI updates

Tests/MusicAssistantCoreTests/SongProjectGenerationDirectorTests.swift

@@ -105,6 +105,42 @@ final class SongProjectGenerationDirectorTests: XCTestCase {
         let requestCount = await aiService.recordedGenerationRequests.count
         XCTAssertEqual(requestCount, 0)
     }
+
+    func testGenerateCompleteProjectPreservesLockedAndManualSeedValues() async throws {
+        let seedProject = SongProject(
+            id: "locked-seed",
+            title: "Seed",
+            idea: "Original",
+            genres: [GenreStyle(id: "arabic-pop", name: "Arabic Pop")],
+            bpm: ManualAutoValue(mode: .manual, value: 96),
+            lyrics: Lyrics(text: "User-approved lyrics"),
+            userLocks: SongProjectUserLocks(scopes: [.genres, .lyrics])
+        )
+        let aiService = RecordingGenerationAIService(
+            generationResult: SongProjectGenerationResult(
+                project: SongProject(
+                    title: "Generated Title",
+                    idea: "Generated idea",
+                    genres: [GenreStyle(id: "rock", name: "Rock")],
+                    bpm: ManualAutoValue(mode: .auto, value: 120),
+                    lyrics: Lyrics(text: "AI lyrics")
+                )
+            )
+        )
+        let director = SongProjectGenerationDirector(aiService: aiService)
+
+        let result = try await director.generateCompleteProject(
+            fromIdea: "Generate around the locked choices",
+            seedProject: seedProject
+        )
+
+        XCTAssertEqual(result.project.title, "Generated Title")
+        XCTAssertEqual(result.project.idea, "Generated idea")
+        XCTAssertEqual(result.project.genres, seedProject.genres)
+        XCTAssertEqual(result.project.lyrics, seedProject.lyrics)
+        XCTAssertEqual(result.project.bpm, seedProject.bpm)
+        XCTAssertEqual(result.project.userLocks, seedProject.userLocks)
+    }
 }
 
 private actor RecordingGenerationAIService: AIService {