[Enhance] Recent 30

- Update Recent 30 mechanism.
- Alter Recent 30 table structure.

Note:
1. This is a TEST version. Maybe there are many bugs.
2. This special version is a line of demarcation.

latest version/core/user.py

@@ -153,8 +153,7 @@ class UserRegister(User):
         character_id, is_skill_sealed, is_char_uncapped, is_char_uncapped_override, is_hide_rating, favorite_character, max_stamina_notification_enabled, current_map, ticket, prog_boost, email)
         values(:user_id, :name, :password, :join_date, :user_code, 0, 0, 0, 0, 0, 0, -1, 0, '', :memories, 0, :email)
         ''', {'user_code': self.user_code, 'user_id': self.user_id, 'join_date': now, 'name': self.name, 'password': self.hash_pwd, 'memories': Config.DEFAULT_MEMORIES, 'email': self.email})
-        self.c.execute('''insert into recent30(user_id) values(:user_id)''', {
-                       'user_id': self.user_id})
+
 
 
 class UserLogin(User):