安全密码生成器工具

使用 HTML5、CSS3 和 JavaScript 创建一个全面的安全密码生成器，具备加密强随机性。构建一个直观的界面，并带有实时密码预览。允许自定义密码长度，并提供针对不同安全级别的预设。包含字符类型（大写字母、小写字母、数字、符号）的开关，并带有视觉指示器。实现一个高级强度计，显示熵位数和预估破解时间。添加一键复制按钮，带确认提示并自动清空剪贴板。创建一个密码保险库功能，使用加密的 localStorage 存储。同时生成多个密码，并提供批量选项。维护一个带生成时间戳的密码历史记录。使用标准公式计算并显示熵。提供易记密码生成选项（基于短语、基于模式）。包含导出功能，并为密码列表提供加密选项。

Create a comprehensive secure password generator using HTML5, CSS3 and JavaScript with cryptographically strong randomness. Build an intuitive interface with real-time password preview. Allow customization of password length with presets for different security levels. Include toggles for character types (uppercase, lowercase, numbers, symbols) with visual indicators. Implement an advanced strength meter showing entropy bits and estimated crack time. Add a one-click copy button with confirmation and automatic clipboard clearing. Create a password vault feature with encrypted localStorage storage. Generate multiple passwords simultaneously with batch options. Maintain a password history with generation timestamps. Calculate and display entropy using standard formulas. Offer memorable password generation options (phrase-based, pattern-based). Include export functionality with encryption options for password lists.