Adding structure and testing around title support

internal/repository/notes.go

@@ -13,13 +13,18 @@ type NoteRepository struct {
 	store NoteStore
 }
 
+type NoteUpdate struct {
+	Title   string
+	Content string
+}
+
 // NewNoteRepository creates and returns a new NoteRepository instance.
 func NewNoteRepository(store NoteStore) *NoteRepository {
 	return &NoteRepository{store: store}
 }
 
 // CreateNote creates a new note with the given content.
-func (r *NoteRepository) CreateNote(ctx context.Context, content string) (models.Note, error) {
+func (r *NoteRepository) CreateNote(ctx context.Context, title string, content string) (models.Note, error) {
 	if content == "" {
 		return models.Note{}, fmt.Errorf("content cannot be empty")
 	}