Let us start here, from square one. No, from Zero!

overlay/windows/screen_resize.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include "overlay/window.h"
+
+namespace overlay::windows {
+
+    class ScreenResize : public Window {
+    public:
+        ScreenResize(SpiceOverlay *overlay);
+        ~ScreenResize() override;
+
+        void build_content() override;
+        void update();
+        
+    private:
+        size_t toggle_screen_resize = ~0u;
+        bool toggle_screen_resize_state = false;
+    };
+}