feat: upgrade to V1.2 - Tags, Click Stats, and Robust WebDAV

- add Tagging system (backend and frontend)
- add Click count statistics and redirection logic
- add config.example.py
- fix WebDAV MKCOL 405 error and response handling
- fix redirection loop during force password change
- audit SQL queries for security

config.py

@@ -1,24 +1,24 @@
 # -*- coding: utf-8 -*-
-"""ToNav 配置文件"""
-
 import os
+from datetime import timedelta
 
 class Config:
-    """基础配置"""
-    # Flask 配置
-    SECRET_KEY = os.environ.get('TONAV_SECRET_KEY') or 'tonav-secret-key-change-in-production-2026'
+    # 基础配置
+    SECRET_KEY = os.environ.get('TONAV_SECRET_KEY', 'dev-key-7306783874')
+    DATABASE_PATH = os.environ.get('TONAV_DB_PATH', os.path.join(os.path.dirname(__file__), 'tonav.db'))
+    
+    # 服务运行配置
+    HOST = os.environ.get('TONAV_HOST', '127.0.0.1')
+    PORT = int(os.environ.get('TONAV_PORT', 9519))
+    DEBUG = os.environ.get('TONAV_DEBUG', 'False').lower() == 'true'
+    
+    # 健康检查
+    HEALTH_CHECK_INTERVAL = 60
+    HEALTH_CHECK_TIMEOUT = 15
+    
+    # 日志配置
+    LOG_FILE = os.path.join(os.path.dirname(__file__), 'tonav.log')
+    LOG_LEVEL = os.environ.get('TONAV_LOG_LEVEL', 'INFO')
 
-    # 数据库配置
-    DATABASE_PATH = os.path.join(os.path.dirname(__file__), 'tonav.db')
-
-    # 服务配置
-    HOST = '127.0.0.1'
-    PORT = 9519
-    DEBUG = False
-
-    # 健康检查配置
-    HEALTH_CHECK_INTERVAL = 60  # 检测间隔（秒）
-    HEALTH_CHECK_TIMEOUT = 15   # 检测超时（秒）
-
-    # 分页配置
-    ITEMS_PER_PAGE = 20
+    # 会话配置
+    PERMANENT_SESSION_LIFETIME = timedelta(days=7)