fix: [smb] Not show smb default domain.

Get the smb default domain from smb.conf, and show it.

Log: fix issue
Bug: https://pms.uniontech.com/bug-view-263539.html

src/dfm-mount/private/dnetworkmounter.cpp

@@ -37,6 +37,7 @@ static constexpr char kLoginDomain[] { "domain" };
 static constexpr char kLoginPasswd[] { "passwd" };
 static constexpr char kLoginTimeout[] { "timeout" };
 static constexpr char kMountFsType[] { "fsType" };
+static constexpr char kSmbConfigPath[] { "/etc/samba/smb.conf" };
 
 static constexpr char kDaemonMountRetKeyMpt[] { "mountPoint" };
 static constexpr char kDaemonMountRetKeyErrno[] { "errno" };
@@ -240,9 +241,9 @@ void DNetworkMounter::mountByDaemon(const QString &address, GetMountPassInfo get
 {
     auto requestLoginInfo = [address, getPassInfo] {
         if (getPassInfo) {
-            QSettings settings("/etc/samba/smb.conf", QSettings::IniFormat);
+            QSettings setting(kSmbConfigPath, QSettings::IniFormat);
             return getPassInfo(QObject::tr("need authorization to access %1").arg(address),
-                               Utils::currentUser(), settings.value("global/workgroup", "WORKGROUP").toString());
+                               Utils::currentUser(), setting.value("global/workgroup", "WORKGROUP").toString());
         }
         return MountPassInfo();
     };