增加Apple登录插件sign_in_with_apple，增加toast提示插件fluttertoast

pubspec.yaml

@@ -53,6 +53,9 @@ dependencies:
   wechat_assets_picker: ^9.8.0
   wechat_camera_picker: ^4.4.0
 
+  # --- Apple 登录 ---
+  sign_in_with_apple: ^7.0.1
+
   # --- 音视频与直播 (重灾区) ---
   # 确保 ffmpeg_kit 版本与你的架构兼容。
   # 如果只是为了压缩视频，建议评估是否移除 video_compress，直接用 ffmpeg
@@ -84,6 +87,8 @@ dependencies:
   open_file: ^3.5.10
   cupertino_icons: ^1.0.8
 
+  fluttertoast: ^9.0.0
+
 dev_dependencies:
   flutter_test:
     sdk: flutter