refactor: fix reverse dependencies — logger_manager→utils, dashboard_service extraction

- Move SystemLogger implementation to utils/logger_manager.py (pure utility, no deps)
- services/logger_manager.py becomes a backward-compat re-export shim
- database/manager.py and database/vendor_manager.py now import from utils layer
- Extract get_dashboard_stats() to services/dashboard_service.py
- services/task_runner.py no longer imports from routes layer
- routes/dashboard_routes.py get_dashboard_stats() delegates to service layer

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

services/dashboard_service.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+看板統計服務
+提供 get_dashboard_stats() 給 task_runner 等 service 層使用，
+避免 services 直接 import routes 層（反向依賴）。
+"""
+
+
+def get_dashboard_stats():
+    """計算看板統計數據 (供通知使用)"""
+    # lazy import 避免循環依賴；routes 在 Flask app 啟動後才可用
+    from routes.dashboard_routes import get_full_dashboard_data
+    data = get_full_dashboard_data()
+    if data:
+        return {
+            'new': data['today_new_products'],
+            'up': len(data['increase_items_all']),
+            'down': len(data['decrease_items_all']),
+            'delisted': data['today_delisted_count']
+        }
+    return {'new': 0, 'up': 0, 'down': 0, 'delisted': 0}

services/logger_manager.py

@@ -1,53 +1,4 @@
-import logging
-import os
-import sys
-from logging.handlers import RotatingFileHandler
-
-class SystemLogger:
-    """
-    自定義系統日誌管理器
-    封裝 logging 模組，提供統一的日誌格式與輸出設定 (Console + File)
-    """
-    def __init__(self, name="System", log_file='system.log'):
-        self.logger = logging.getLogger(name)
-        self.logger.setLevel(logging.DEBUG)
-        
-        # 避免重複添加 Handler (防止日誌重複輸出)
-        if not self.logger.handlers:
-            # 取得專案根目錄 (假設此檔案位於 services/ 目錄下，往上兩層為根目錄)
-            base_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
-            log_dir = os.path.join(base_dir, 'logs')
-            
-            # 確保 logs 目錄存在
-            if not os.path.exists(log_dir):
-                try:
-                    os.makedirs(log_dir)
-                except OSError:
-                    pass # 忽略無法建立目錄的錯誤，改由 Console 輸出
-                
-            file_path = os.path.join(log_dir, log_file)
-            
-            # 1. 檔案輸出 (RotatingFileHandler) - 支援自動切割
-            try:
-                file_handler = RotatingFileHandler(
-                    file_path, 
-                    maxBytes=10*1024*1024, # 10MB 切割
-                    backupCount=5, 
-                    encoding='utf-8'
-                )
-                file_handler.setLevel(logging.DEBUG)
-                formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
-                file_handler.setFormatter(formatter)
-                self.logger.addHandler(file_handler)
-            except Exception as e:
-                print(f"⚠️ Logger Init Warning: 無法建立日誌檔案 ({e})")
-
-            # 2. 控制台輸出 (StreamHandler)
-            console_handler = logging.StreamHandler(sys.stdout)
-            console_handler.setLevel(logging.INFO)
-            console_formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
-            console_handler.setFormatter(console_formatter)
-            self.logger.addHandler(console_handler)
-
-    def get_logger(self):
-        return self.logger
+# backward-compat re-export — 實作已移至 utils/logger_manager.py
+# 保留此檔案確保既有 `from services.logger_manager import SystemLogger` 不受影響
+from utils.logger_manager import SystemLogger  # noqa: F401
+from utils.logger_manager import *  # noqa: F401, F403

services/task_runner.py

@@ -39,7 +39,7 @@ def run_momo_task_with_notification():
                 import services.notification_manager
                 importlib.reload(services.notification_manager)
                 from services.notification_manager import NotificationManager
-                from routes.dashboard_routes import get_dashboard_stats
+                from services.dashboard_service import get_dashboard_stats
 
                 stats = get_dashboard_stats()