feat(app): 完善播放协议搜索与空状态

test/auth/auth_page_test.dart

@@ -461,6 +461,7 @@ class _FailingAuthApi extends AuthApi {
     required String password,
     required String deviceId,
     String platform = '',
+    String osVersion = '',
     String appVersion = '',
   }) async {
     loginCalls++;
@@ -474,6 +475,7 @@ class _FailingAuthApi extends AuthApi {
     required String password,
     required String deviceId,
     String platform = '',
+    String osVersion = '',
     String appVersion = '',
   }) async {
     registerCalls++;
@@ -501,6 +503,7 @@ class _PendingAuthApi extends AuthApi {
     required String password,
     required String deviceId,
     String platform = '',
+    String osVersion = '',
     String appVersion = '',
   }) async {
     loginCalls++;