fix(kodbox_service): 修复 token 获取逻辑

lib/services/kodbox_service.dart

@@ -15,7 +15,7 @@ class KodBoxService {
     if (response.statusCode == 200) {
       final data = jsonDecode(response.body);
       if (data['code'] == true) {
-        return data['data']['accessToken'];
+        return data['info'];
       } else {
         throw Exception('获取token失败: ${data['info'] ?? '未知错误'}');
       }