clean up models

Signed-off-by: dom <githubaccount56556@proton.me>

lib/models_new/msg/msg_at/content.dart

@@ -1,53 +1,20 @@
 class MsgAtContent {
-  String? type;
   String? business;
-  int? businessId;
-  String? title;
   String? image;
-  String? uri;
-  int? subjectId;
-  int? rootId;
-  int? targetId;
-  int? sourceId;
   String? sourceContent;
   String? nativeUri;
-  List<dynamic>? atDetails;
-  List<dynamic>? topicDetails;
-  bool? hideReplyButton;
 
   MsgAtContent({
-    this.type,
     this.business,
-    this.businessId,
-    this.title,
     this.image,
-    this.uri,
-    this.subjectId,
-    this.rootId,
-    this.targetId,
-    this.sourceId,
     this.sourceContent,
     this.nativeUri,
-    this.atDetails,
-    this.topicDetails,
-    this.hideReplyButton,
   });
 
   factory MsgAtContent.fromJson(Map<String, dynamic> json) => MsgAtContent(
-    type: json['type'] as String?,
     business: json['business'] as String?,
-    businessId: json['business_id'] as int?,
-    title: json['title'] as String?,
     image: json['image'] as String?,
-    uri: json['uri'] as String?,
-    subjectId: json['subject_id'] as int?,
-    rootId: json['root_id'] as int?,
-    targetId: json['target_id'] as int?,
-    sourceId: json['source_id'] as int?,
     sourceContent: json['source_content'] as String?,
     nativeUri: json['native_uri'] as String?,
-    atDetails: json['at_details'] as List<dynamic>?,
-    topicDetails: json['topic_details'] as List<dynamic>?,
-    hideReplyButton: json['hide_reply_button'] as bool?,
   );
 }

lib/models_new/msg/msg_at/user.dart

@@ -1,26 +1,17 @@
 class User {
   int? mid;
-  int? fans;
   String? nickname;
   String? avatar;
-  String? midLink;
-  bool? follow;
 
   User({
     this.mid,
-    this.fans,
     this.nickname,
     this.avatar,
-    this.midLink,
-    this.follow,
   });
 
   factory User.fromJson(Map<String, dynamic> json) => User(
     mid: json['mid'] as int?,
-    fans: json['fans'] as int?,
     nickname: json['nickname'] as String?,
     avatar: json['avatar'] as String?,
-    midLink: json['mid_link'] as String?,
-    follow: json['follow'] as bool?,
   );
 }