fix: disconnect lineEdit in AuthPassword destructor

1. Added disconnect call for m_lineEdit from this object in destructor
2. Prevents potential lambda function access to deleted this pointer
3. Ensures clean signal-slot disconnection during object destruction
4. Avoids use-after-free crashes when signals are emitted after object
deletion

Influence:
1. Test password authentication widget destruction scenarios
2. Verify no crashes when closing authentication dialogs
3. Test signal emission handling during widget lifecycle
4. Validate memory safety in authentication flow

fix: 在AuthPassword析构函数中断开lineEdit连接

1. 在析构函数中添加了m_lineEdit与当前对象的断开连接调用
2. 防止lambda函数访问已删除的this指针
3. 确保对象销毁时信号槽连接的清理
4. 避免对象删除后信号发射导致的use-after-free崩溃

Influence:
1. 测试密码认证小部件的销毁场景
2. 验证关闭认证对话框时不会出现崩溃
3. 测试小部件生命周期中的信号发射处理
4. 验证认证流程中的内存安全性

pms: BUG-341127

Author: mhduiy

src/session-widgets/auth_password.cpp

@@ -75,6 +75,8 @@ AuthPassword::AuthPassword(QWidget *parent)
 
 AuthPassword::~AuthPassword()
 {
+    // QWidget析构时会clearFocus, focusChanged会被触发，且槽函数操作了成员变量会导致崩溃，在这里提前断开连接
+    m_lineEdit->disconnect(this);
     if (m_resetPasswordMessageVisible) {
         closeResetPasswordMessage();
     }