重构：新增定时插件业务逻辑内聚到各自插件目录

- daily_news 插件内置百度新闻与60s图片获取逻辑，移除对 base.func_news 的业务依赖\n- epic_free 插件内置周五判断与免费游戏抓取逻辑，移除对 base.func_epic 的业务依赖\n- daily_ranking 插件内置排行生成与积分奖励逻辑，不再依赖 MessageStorage 业务封装\n- sehuatang_push 改为引用插件目录内的抓取与PDF生成实现，将核心业务代码迁入插件目录\n- 确保新插件可独立承载自身业务逻辑，平台层仅提供调度与基础设施能力

plugins/epic_free/main.py

@@ -1,7 +1,10 @@
 # -*- coding: utf-8 -*-
+from datetime import datetime
 from typing import Any, Dict, List, Optional, Tuple
 
-from base.func_epic import get_free, is_friday
+import requests
+from bs4 import BeautifulSoup
+
 from base.plugin_common.message_plugin_interface import MessagePluginInterface
 from base.plugin_common.plugin_interface import PluginStatus
 from utils.robot_cmd.robot_command import GroupBotManager
@@ -89,7 +92,7 @@ class EpicFreePlugin(MessagePluginInterface):
 
         payload = context.get("payload") or {}
         force = bool(payload.get("force", False))
-        if not force and not is_friday():
+        if not force and not self._is_friday():
             # 非周五时默认跳过；手动触发可通过 payload.force 强制执行。
             return {"success": True, "summary": "今天不是周五，已跳过 Epic 播报", "detail": {"skipped": True}}
 
@@ -103,7 +106,7 @@ class EpicFreePlugin(MessagePluginInterface):
             return {"success": False, "summary": "没有可推送目标群", "detail": {"target_count": 0}}
 
         try:
-            text = get_free()
+            text = self._get_free_games()
         except Exception as e:
             return {"success": False, "summary": f"获取 Epic 免费游戏失败: {e}", "detail": {"error": str(e)}}
 
@@ -126,3 +129,58 @@ class EpicFreePlugin(MessagePluginInterface):
                 "force": force,
             },
         }
+
+    @staticmethod
+    def _is_friday() -> bool:
+        """判断是否周五（插件内实现）。"""
+        return datetime.today().weekday() == 4
+
+    @staticmethod
+    def _get_free_games() -> str:
+        """抓取 Epic 免费游戏列表（插件内实现）。"""
+        url = "https://steamstats.cn/xi"
+        headers = {
+            "User-Agent": (
+                "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 "
+                "(KHTML, like Gecko) Chrome/90.0.4430.72 Safari/537.36 Edg/90.0.818.41"
+            )
+        }
+        resp = requests.get(url, headers=headers, timeout=20)
+        resp.raise_for_status()
+        resp.encoding = resp.apparent_encoding
+        soup = BeautifulSoup(resp.text, "html.parser")
+        text = "今日喜加一  :https://store.epicgames.com/en-US/free-games\n"
+
+        tbody = soup.find("tbody")
+        if not tbody:
+            return text + "未抓取到免费游戏列表"
+
+        rows = tbody.find_all("tr")
+        idx = 1
+        for row in rows:
+            cols = row.find_all("td")
+            if len(cols) < 7:
+                continue
+            name = (cols[1].string or "").strip()
+            gametype = (cols[2].string or "").replace(" ", "").strip()
+            start = (cols[3].string or "").replace(" ", "").strip()
+            end = (cols[4].string or "").replace(" ", "").strip()
+            permanent = (cols[5].string or "").replace(" ", "").strip()
+            origin_span = cols[6].find("span")
+            origin = (origin_span.string or "").replace(" ", "").strip() if origin_span else ""
+            href_value = ""
+            for a in cols[6].find_all("a"):
+                href_value = a.get("href", "") or href_value
+
+            text += (
+                f"序号：{idx}\n"
+                f"游戏名称：{name}\n"
+                f"DLC/game：{gametype}\n"
+                f"开始时间：{start}\n"
+                f"结束时间：{end}\n"
+                f"是否永久：{permanent}\n"
+                f"平台：{origin}\n"
+                f"URL：{href_value}\n"
+            )
+            idx += 1
+        return text