Add UI positioning option for configuration dialog

Allows users to switch between vertical and horizontal navigation
layouts. Includes new UI positioning setting, dynamic layout switching,
and style animation event filter for improved UX.

Signed-off-by: Zephyron <zephyron@citron-emu.org>

src/citron/configuration/configure_dialog.h

@@ -9,24 +9,17 @@
 #include <QColor>
 #include <QDialog>
 #include "common/settings_enums.h"
-#include "citron/configuration/shared_widget.h" // <-- Correct header for Builder
+#include "citron/configuration/shared_widget.h"
 
-// Forward declarations for other types
+// Forward declarations
 class HotkeyRegistry;
 class QButtonGroup;
+class QPushButton;
 class QTimer;
-namespace InputCommon {
-    class InputSubsystem;
-}
-namespace Core {
-    class System;
-}
-namespace VkDeviceInfo {
-    class Record;
-}
-namespace Ui {
-    class ConfigureDialog;
-}
+namespace InputCommon { class InputSubsystem; }
+namespace Core { class System; }
+namespace VkDeviceInfo { class Record; }
+namespace Ui { class ConfigureDialog; }
 class ConfigureApplets;
 class ConfigureAudio;
 class ConfigureCpu;
@@ -62,18 +55,17 @@ public slots:
 signals:
     void LanguageChanged(const QString& locale);
 
+private slots:
+    void SetUIPositioning(const QString& positioning);
+
 private:
     void SetConfiguration();
     void HandleApplyButtonClicked();
-
     void changeEvent(QEvent* event) override;
     void RetranslateUI();
-
     void OnLanguageChanged(const QString& locale);
 
     QColor last_palette_text_color;
-
-    // All members are now in the EXACT correct order to match the constructor
     std::unique_ptr<Ui::ConfigureDialog> ui;
     HotkeyRegistry& registry;
     Core::System& system;
@@ -94,6 +86,7 @@ private:
     std::unique_ptr<ConfigureSystem> system_tab;
     std::unique_ptr<ConfigureWeb> web_tab;
     std::unique_ptr<QButtonGroup> tab_button_group;
+    std::vector<QPushButton*> tab_buttons;
     QTimer* rainbow_timer;
     float rainbow_hue = 0.0f;
 };