Add input restrictions in AccountFormDialog name edit.

src/dialogs/AccountFormDialog.cpp

@@ -6,6 +6,7 @@
 #include <QDebug>
 #include <QToolButton>
 #include <QPushButton>
+#include <QRegExpValidator>
 
 #include "event/EventCenter.h"
 #include "log/UserOperationLog.h"
@@ -48,6 +49,7 @@ AccountFormDialog::AccountFormDialog(QWidget* parent, AccountEditMode mode, Qt::
             &AccountFormDialog::changeSelfPassword : &AccountFormDialog::resetUserPassword);
     }
 
+    mLeUserName->setValidator(new QRegExpValidator(QRegExp("^[A-Za-z0-9\u4e00-\u9fa5]+$")));
     connect(mLeComment, &QLineEdit::textChanged, [=](const QString& text) {
         mCommentChanged = true;
         });