feat: add server UUID management and local proxy settings

- Implemented UUID migration for servers to ensure each server has a unique identifier.
- Added methods for managing local proxy settings, including owner UUID, port, and HTTP enablement.
- Updated server model to include server UUID role for better data handling.

client/settings.h

@@ -239,11 +239,20 @@ public:
     QStringList readNewsIds() const;
     void setReadNewsIds(const QStringList &ids);
 
+    // Local proxy settings
+    QString localProxyOwnerUuid() const;
+    void setLocalProxyOwnerUuid(const QString &uuid);
+    quint16 localProxyPort() const;
+    void setLocalProxyPort(quint16 port);
+    bool isLocalProxyHttpEnabled() const;
+    void setLocalProxyHttpEnabled(bool enabled);
+
 signals:
     void saveLogsChanged(bool enabled);
     void screenshotsEnabledChanged(bool enabled);
     void serverRemoved(int serverIndex);
     void settingsCleared();
+    void localProxySettingsChanged();
 
 private:
     QVariant value(const QString &key, const QVariant &defaultValue = QVariant()) const;
@@ -251,6 +260,8 @@ private:
 
     void setInstallationUuid(const QString &uuid);
 
+    void migrateServerUuids();
+
     mutable SecureQSettings m_settings;
 
     QString m_gatewayEndpoint;