Add local UDP discovery and invitation delivery for chat clients

tools/chatgui/tests/test_gui_language.cpp

@@ -6,6 +6,7 @@
 
 #include <QtTest>
 #include <QComboBox>
+#include <QCheckBox>
 #include <QDialogButtonBox>
 #include <QPushButton>
 #include <QFile>
@@ -20,6 +21,27 @@ class GuiLanguageTest : public QObject {
 private slots:
     void initTestCase() { debug_config_init(); }
 
+    void localNetworkPermissions() {
+        QTemporaryDir directory;
+        QVERIFY(directory.isValid());
+        const QString path = directory.filePath("local.cfg");
+        QVERIFY(config_rewrite_servers(path, {}));
+        NetworkSettingsPage page; page.loadFromConfig(path);
+        auto* receive = page.findChild<QCheckBox*>("localInvitesEnabled");
+        auto* broadcasts = page.findChild<QCheckBox*>("localBroadcastsEnabled");
+        QVERIFY(receive && broadcasts);
+        QVERIFY(page.localInvitesEnabled() && page.localBroadcastsEnabled());
+        receive->setChecked(false); broadcasts->setChecked(false);
+        QVERIFY(page.saveToConfig(path));
+        NetworkSettingsPage restored; restored.loadFromConfig(path);
+        QVERIFY(!restored.localInvitesEnabled() && !restored.localBroadcastsEnabled());
+        receive->setChecked(true); QVERIFY(page.saveToConfig(path));
+        restored.loadFromConfig(path);
+        QVERIFY(restored.localInvitesEnabled() && !restored.localBroadcastsEnabled());
+        QVERIFY(config_update_option(path, "chatserver", "local_broadcasts_enabled", "yes"));
+        restored.loadFromConfig(path); QVERIFY(restored.localBroadcastsEnabled());
+    }
+
     void systemPreference() {
         QCOMPARE(resolveGuiLanguage("system", {"ru-RU", "en-US"}), QString("ru"));
         QCOMPARE(resolveGuiLanguage("system", {"en-GB", "ru-RU"}), QString("en"));