feat: 新增设置页面，包含通用、安全、数据管理功能，并引入相关类型定义。

src/pages/Settings/Settings.tsx

@@ -455,6 +455,40 @@ function Settings() {
                     />
                   </div>
                 </div>
+
+                <div className="settings-item">
+                  <div className="settings-item-info">
+                    <label className="settings-item__label">通知方式</label>
+                    <p className="settings-item__description">选择接收相关通知的方式</p>
+                  </div>
+                  <CustomSelect
+                    className="settings-custom-select"
+                    value={userSettings?.notificationChannel || 'sms'}
+                    onChange={(value) => handleUserSettingChange('notificationChannel', value)}
+                    options={[
+                      { value: 'sms', label: '仅短信' },
+                      { value: 'email', label: '仅邮件' },
+                      { value: 'both', label: '短信和邮件' },
+                      { value: 'none', label: '不通知' },
+                    ]}
+                  />
+                </div>
+
+                <div className="settings-item">
+                  <div className="settings-item-info">
+                    <label className="settings-item__label">邮箱地址</label>
+                    <p className="settings-item__description">用于接收邮件通知</p>
+                  </div>
+                  <div className="settings-input-container">
+                    <input
+                      type="email"
+                      className="settings-text-input"
+                      placeholder="请输入邮箱"
+                      value={userSettings?.email || ''}
+                      onChange={(e) => handleUserSettingChange('email', e.target.value)}
+                    />
+                  </div>
+                </div>
               </div>
             </div>
           </section>

src/types/index.ts

@@ -78,6 +78,8 @@ export interface UserSettings {
   defaultExpenseAccount?: Account | null;
   defaultIncomeAccount?: Account | null;
   phone?: string;
+  email?: string;
+  notificationChannel?: 'sms' | 'email' | 'both' | 'none';
 }
 
 // Tag Interface