added buttons to main state

src/core/application/ApplicationManager.h

@@ -21,6 +21,7 @@ class LineEffect;
 // Forward declare state classes (top-level, defined under src/states)
 class LoadingState;
 class MenuState;
+class OptionsState;
 class LevelSelectorState;
 class PlayingState;
 
@@ -95,6 +96,8 @@ private:
     bool m_showSettingsPopup = false;
     bool m_showExitConfirmPopup = false;
     int m_exitPopupSelectedButton = 1; // 0 = YES, 1 = NO
+    bool m_isFullscreen = false;
+    std::string m_playerName = "PLAYER";
     uint64_t m_loadStartTicks = 0;
     bool m_musicStarted = false;
     bool m_musicLoaded = false;
@@ -120,6 +123,7 @@ private:
     // State objects (mirror main.cpp pattern)
     std::unique_ptr<LoadingState> m_loadingState;
     std::unique_ptr<MenuState> m_menuState;
+    std::unique_ptr<OptionsState> m_optionsState;
     std::unique_ptr<LevelSelectorState> m_levelSelectorState;
     std::unique_ptr<PlayingState> m_playingState;
     // Application state