fix: fix local proxy settings and restart logic

- Added local proxy restart token management in Settings.
- Implemented logic to handle local proxy state on application quit.
- Updated ProxyServer to restart based on configuration changes.
- Enhanced API configuration updates to bump restart token when necessary.
- Improved UI components to reflect local proxy availability and state.
- Added new error handling and notifications for local proxy operations.

client/core/controllers/coreController.cpp

@@ -1,5 +1,6 @@
 #include "coreController.h"
 
+#include <QCoreApplication>
 #include <QDirIterator>
 #include <QDebug>
 #include <QTranslator>
@@ -41,6 +42,12 @@ void CoreController::initLocalProxy()
 
     m_proxyServer.reset(new ProxyServer(m_settings, this));
 
+    QObject::connect(QCoreApplication::instance(), &QCoreApplication::aboutToQuit, this, [this]() {
+        if (m_settings && m_settings->isLocalProxyHttpEnabled()) {
+            m_settings->setLocalProxyHttpEnabled(false);
+        }
+    });
+
     auto syncLocalProxy = [this]() {
         if (!m_proxyServer) {
             return;