feat: 会员体验版、俱乐部分离上架与分红计数加固

扩展 club_huiyuan_price/huiyuangoumai/czjilu/gsfenhong 字段；微信购会员强制写 czjilu+收支入账；formal_cishu 仅统计正式已支付单；关闭余额购会员；俱乐部上架/下架 API。

Co-authored-by: Cursor <cursoragent@cursor.com>

products/models.py

@@ -172,6 +172,8 @@ class Huiyuangoumai(QModel):
     club_id = models.CharField(
         max_length=16, default='xq', db_index=True, verbose_name='所属俱乐部',
     )
+    is_trial = models.BooleanField(default=False, verbose_name='当前是否为体验权益')
+    has_used_trial = models.BooleanField(default=False, verbose_name='是否已购买过体验版')
 
     class Meta:
         db_table = 'huiyuangoumai'
@@ -218,6 +220,10 @@ class Czjilu(QModel):
     club_id = models.CharField(
         max_length=16, default='xq', db_index=True, verbose_name='所属俱乐部',
     )
+    is_trial = models.BooleanField(default=False, verbose_name='是否体验会员单')
+    purchase_days = models.PositiveIntegerField(
+        null=True, blank=True, verbose_name='下单锁定有效天数',
+    )
     CreateTime = models.DateTimeField(auto_now_add=True, verbose_name='创建时间')
     UpdateTime = models.DateTimeField(auto_now=True, verbose_name='更新时间')
     class Meta:
@@ -258,6 +264,7 @@ class Gsfenhong(QModel):
     club_id = models.CharField(
         max_length=16, default='xq', db_index=True, verbose_name='所属俱乐部',
     )
+    is_trial = models.BooleanField(default=False, verbose_name='是否体验会员分红')
 
     class Meta:
         db_table = 'gsfenhong'