服务端接口优化

todo：待添加影评海报，书评书摘的接口与标签接口

lib/pages/movies/movie_posters_page.dart

@@ -8,6 +8,7 @@ import 'package:provider/provider.dart';
 import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';
 import 'package:http/http.dart' as http;
 import '../../providers/app_provider.dart';
+import '../../widgets/fade_in_local_image.dart';
 import '../../models/data_models.dart';
 import '../../utils/toast_util.dart';
 import '../../utils/image_path_helper.dart';
@@ -158,15 +159,9 @@ class _MoviePostersPageState extends State<MoviePostersPage> {
             fit: StackFit.expand,
             children: [
               // 海报图片
-              Image.file(
-                File(poster.posterPath),
+              FadeInLocalImage(
+                path: poster.posterPath,
                 fit: BoxFit.cover,
-                errorBuilder: (_, __, ___) => Center(
-                  child: Icon(
-                    Icons.broken_image,
-                    color: colors.onSurface.withValues(alpha: 0.25),
-                  ),
-                ),
               ),
               // 渐变遮罩（底部）
               Positioned(