corregit el escalat de finestra i mode fullscreen

source/core/rendering/sdl_manager.hpp

@@ -62,8 +62,16 @@ class SDLManager {
         int max_width_;  // Calculat des del display
         int max_height_;
 
+        // [ZOOM SYSTEM]
+        float zoom_factor_;           // Current zoom (0.5x to max_zoom_)
+        int windowed_width_;          // Saved size before fullscreen
+        int windowed_height_;         // Saved size before fullscreen
+        float max_zoom_;              // Maximum zoom (calculated from display)
+
         // [NUEVO] Funcions internes
         void calculateMaxWindowSize();                // Llegir resolució del display
+        void calculateMaxZoom();                      // Calculate max zoom from display
+        void applyZoom(float new_zoom);               // Apply zoom and resize window
         void applyWindowSize(int width, int height);  // Canviar mida + centrar
         void updateLogicalPresentation();             // Actualitzar viewport