fix: Remove redundant signal emission in proxy settings

Remove unnecessary ProxyMethodChanged signal emission when setting proxy method. The signal was redundant as the proxy mode change is already handled by other mechanisms.

Log: Removed redundant proxy method change signal
PMS: BUG-271003

fix: 移除代理设置中的冗余信号发射

在设置代理方法时移除不必要的ProxyMethodChanged信号发射。该信号是冗余的，因为代理模式变更已通过其他机制处理。

Log: 移除冗余的代理方法变更信号
PMS: BUG-271003

Author: ut003640

network-service-plugin/src/session/networkproxy.cpp

@@ -109,7 +109,6 @@ void NetworkProxy::SetProxyMethod(const QString &proxyMode)
         return;
     }
     m_proxySettings->set(GkeyProxyMode, proxyMode);
-    Q_EMIT ProxyMethodChanged(proxyMode);
     if (proxyMode == ProxyModeNone) {
         m_networkStateHandler->notify(notifyIconProxyDisabled, tr("Network"), tr("System proxy has been cancelled."));
     } else {
@@ -228,7 +227,19 @@ void NetworkProxy::onConfigChanged(const QString &key)
     if (!settings)
         return;
 
-    if (key == "host" || key == "autoconfigUrl") {
+    bool isHost = false;
+    if (settings == m_proxySettings) {
+        if (key == "autoconfigUrl") {
+            isHost = true;
+        } else if (key == "mode") {
+            // 模式发生变化，此时需要告诉外面
+            Q_EMIT ProxyMethodChanged(settings->get(key).toString());
+        }
+    } else {
+        isHost = (key == "host");
+    }
+
+    if (isHost) {
         emit proxyChanged(settings->property("type").toString(), settings->get(key).toString());
     }
 }