Move remaining code to app module

There's still some stuff that could potentially go elsewhere but I think it's enough for now.

src/app/proxycontroller.cpp

@@ -0,0 +1,48 @@
+// SPDX-FileCopyrightText: 2024 Tobias Fella <tobias.fella@kde.org>
+// SPDX-License-Identifier: LGPL-2.0-or-later
+
+#include "proxycontroller.h"
+
+#include <QNetworkProxy>
+#include <QNetworkProxyFactory>
+
+#include "neochatconfig.h"
+
+void ProxyController::setApplicationProxy()
+{
+    auto cfg = NeoChatConfig::self();
+    QNetworkProxy proxy;
+
+    switch (cfg->proxyType()) {
+    case 1:
+        proxy.setType(QNetworkProxy::HttpProxy);
+        proxy.setHostName(cfg->proxyHost());
+        proxy.setPort(cfg->proxyPort());
+        proxy.setUser(cfg->proxyUser());
+        proxy.setPassword(cfg->proxyPassword());
+        QNetworkProxy::setApplicationProxy(proxy);
+        break;
+    case 2:
+        proxy.setType(QNetworkProxy::Socks5Proxy);
+        proxy.setHostName(cfg->proxyHost());
+        proxy.setPort(cfg->proxyPort());
+        proxy.setUser(cfg->proxyUser());
+        proxy.setPassword(cfg->proxyPassword());
+        QNetworkProxy::setApplicationProxy(proxy);
+        break;
+    case 3:
+        proxy.setType(QNetworkProxy::NoProxy);
+        QNetworkProxy::setApplicationProxy(proxy);
+        break;
+    default:
+        QNetworkProxyFactory::setUseSystemConfiguration(true);
+        break;
+    }
+}
+
+ProxyController::ProxyController(QObject *parent)
+    : QObject(parent)
+{
+}
+
+#include "moc_proxycontroller.cpp"