fix: UOS非AD域名帐户删除AD域名账户后home目录下的AD域账户目录没有同步删除

daemon删除用户目录后dconfig-daemon创建了指定用户路径
修改为当用户目录不存在时不进行相应操作，避免错误的创建目录

Log: 修复UOS非AD域名帐户删除AD域名账户后home目录下的AD域账户目录没有同步删除
Influence: 控制中心-账户-删除用户目录
Bug: https://pms.uniontech.com/bug-view-185841.html
Change-Id: Ibe6dd08b0227bc41beef66834d519c30b4e8f7ef

src/dconfigfile.cpp

@@ -1054,7 +1054,7 @@ class Q_DECL_HIDDEN DConfigCacheImpl : public DConfigCache {
                 homePath = DStandardPaths::homePath(getuid());
             }
 
-            if (homePath.isEmpty())
+            if (homePath.isEmpty() || !QDir().exists(homePath))
                 return QString();
 
             // fallback to default application cache directory.
@@ -1212,7 +1212,7 @@ bool DConfigCacheImpl::save(const QString &localPrefix, QJsonDocument::JsonForma
     cacheChanged = false;
     const QString &dir = getCacheDir(localPrefix);
     if (dir.isEmpty()) {
-        qCWarning(cfLog, "Falied on saveing, the config cache directory is empty for the user[%d], "
+        qCWarning(cfLog, "Failed on saving, the config cache directory is empty for the user[%d], "
                          "the current user[%d].", userid, getuid());
         return false;
     }
@@ -1224,7 +1224,7 @@ bool DConfigCacheImpl::save(const QString &localPrefix, QJsonDocument::JsonForma
     }
 
     if (!cache.open(QIODevice::WriteOnly)) {
-        qCWarning(cfLog, "Falied on saveing data when open file: \"%s\", error message: \"%s\"",
+        qCWarning(cfLog, "Failed on saving data when open file: \"%s\", error message: \"%s\"",
                   qPrintable(cache.fileName()), qPrintable(cache.errorString()));
         return false;
     }