feat: v0.0.3 - 分类逻辑优化

【post_type 分类优化】
- 有"出"、"售"、"卖" → 出售(deal)
- 有"收"、"求"、"购"、"要" → 求购(want)
- 有"确认"、"朋友"、"投诉" → 其他(normal)
- else → 出售(deal)  # 默认改为出售

【category 分类优化】
- 优先级：龙钞 > 马钞 > 蛇钞 > 其他
- 龙钞：含"龙"、"龙钞"、"小龙钞"、"钞王"
- 马钞：含"马"、"马钞"
- 蛇钞：含"蛇"、"蛇钞"
- 其他：以上都不是

【历史数据清洗】
- 重新分类 1813 条 post_type
- 重新分类全量 category 数据

crawlers/crawl_today.py

@@ -166,21 +166,28 @@ class YichensTodaySpider(PaginationSpider):
             if "标百" in title:
                 special_types.append("标百")
         
-        post_type = "normal"
+        # post_type 分类逻辑：出售 > 求购 > 其他 > 默认出售
         if title:
-            if any(c in title for c in ["出", "售", "卖", "兑"]):
+            if any(c in title for c in ["出", "售", "卖"]):
                 post_type = "deal"
-            elif any(c in title for c in ["求", "收", "购"]):
+            elif any(c in title for c in ["收", "求", "购", "要"]):
                 post_type = "want"
+            elif any(c in title for c in ["确认", "朋友", "投诉"]):
+                post_type = "normal"
+            else:
+                post_type = "deal"  # 默认出售
+        else:
+            post_type = "normal"
         
+        # category 分类逻辑（优先级：龙钞 > 马钞 > 蛇钞 > 其他）
         category = "其他"
         if title:
-            if "龙钞" in title or "龙纪念" in title:
+            if any(c in title for c in ["龙", "龙钞", "小龙钞", "钞王"]):
                 category = "龙钞"
-            elif "蛇钞" in title:
+            elif any(c in title for c in ["马", "马钞"]):
-                category = "蛇钞"
-            elif "马钞" in title:
                 category = "马钞"
+            elif any(c in title for c in ["蛇", "蛇钞"]):
+                category = "蛇钞"
         
         # 从 postuserinfo div 的 <b> 标签提取用户名（跳过电话号码）
         if not author: