feat(splash): 缩短开屏停留并统一开屏图

lib/main.dart

@@ -1,5 +1,7 @@
 // Author: fruit.com.cn
 
+import 'dart:async';
+
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 
@@ -9,10 +11,10 @@ import 'core/config/server_endpoint.dart';
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
-  await Future.wait([
-    SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]),
-    ServerEndpoint.load(),
-  ]);
+  await ServerEndpoint.load();
   AppConfig.ready = AppConfig.probeAndApplyBaseUrl();
   runApp(const LumaDramaApp());
+  unawaited(
+    SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]),
+  );
 }