opt: unify fav & coin of video & pgc (#916)

lib/models_new/video/video_detail/stat.dart

@@ -1,47 +1,25 @@
-class Stat {
+import 'package:PiliPlus/models_new/video/video_detail/stat_detail.dart';
+
+class VideoStat extends StatDetail {
   int? aid;
-  int? view;
-  int? danmaku;
-  int? reply;
-  int favorite;
-  num coin;
-  int? share;
   int? nowRank;
   int? hisRank;
-  int like;
   int? dislike;
   String? evaluation;
-  int? vt;
 
-  Stat({
-    this.aid,
-    this.view,
-    this.danmaku,
-    this.reply,
-    required this.favorite,
-    required this.coin,
-    this.share,
-    this.nowRank,
-    this.hisRank,
-    required this.like,
-    this.dislike,
-    this.evaluation,
-    this.vt,
-  });
-
-  factory Stat.fromJson(Map<String, dynamic> json) => Stat(
-    aid: json['aid'] as int?,
-    view: json['view'] as int?,
-    danmaku: json['danmaku'] as int?,
-    reply: json['reply'] as int?,
-    favorite: json['favorite'] as int? ?? 0,
-    coin: json['coin'] as num? ?? 0,
-    share: json['share'] as int?,
-    nowRank: json['now_rank'] as int?,
-    hisRank: json['his_rank'] as int?,
-    like: json['like'] as int? ?? 0,
-    dislike: json['dislike'] as int?,
-    evaluation: json['evaluation'] as String?,
-    vt: json['vt'] as int?,
-  );
+  VideoStat.fromJson(Map<String, dynamic> json) {
+    aid = json['aid'] as int?;
+    view = json['view'] as int?;
+    danmaku = json['danmaku'] as int?;
+    reply = json['reply'] as int?;
+    favorite = json['favorite'] as int? ?? 0;
+    coin = json['coin'] as num? ?? 0;
+    share = json['share'] as int?;
+    nowRank = json['now_rank'] as int?;
+    hisRank = json['his_rank'] as int?;
+    like = json['like'] as int? ?? 0;
+    dislike = json['dislike'] as int?;
+    evaluation = json['evaluation'] as String?;
+    vt = json['vt'] as int?;
+  }
 }