修复讨论区与任务榜加载错误

models.py

@@ -124,32 +124,6 @@ class WithdrawRequest(BaseModel):
     code: str
 
 
-# ==========================================
-# 💬 讨论区数据模型
-# ==========================================
-class PostCreate(BaseModel):
-    """ 发布讨论区内容 """
-    title: str                              # 标题
-    content: str                            # 文案内容
-    coverImage: str                         # 封面图
-    images: Optional[List[str]] = []        # 详情图（最多9张）
-    author: str                             # 作者账号
-
-class PostUpdate(BaseModel):
-    """ 更新讨论区内容 """
-    title: Optional[str] = None
-    content: Optional[str] = None
-    coverImage: Optional[str] = None
-    images: Optional[List[str]] = None
-
-class PostInteraction(BaseModel):
-    """ 讨论区互动（点赞/收藏） """
-    post_id: str
-    user_id: str
-    action_type: str                        # like / favorite
-    is_active: bool                         # True=添加, False=取消
-
-
 # ==========================================
 # 📝 任务榜数据模型
 # ==========================================