add user statistics

app/models/user.py

@@ -1,4 +1,4 @@
-from sqlalchemy import Column, DateTime, String
+from sqlalchemy import Column, DateTime, String, Integer
 from sqlalchemy.sql import func
 
 from .base import AutoID, Base
@@ -16,6 +16,12 @@ class User(Base, AutoID):
     # 类似 Twitter 的 @code 唯一标识
     handle = Column(String, unique=True, index=True, nullable=True)
     avatar = Column(String)
+    
+    # ---- 互动统计字段 ----
+    following_count = Column(Integer, default=0, nullable=False, server_default="0")            # 关注了多少人
+    follower_count = Column(Integer, default=0, nullable=False, server_default="0")             # 粉丝数
+    likes_received_count = Column(Integer, default=0, nullable=False, server_default="0")       # 收到的点赞数
+    favorites_received_count = Column(Integer, default=0, nullable=False, server_default="0")   # 收到的收藏数
 
     created_at = Column(DateTime(timezone=True), server_default=func.now())