tic tac toe works on touch and eink

display/low_level_display_st7796.h

@@ -10,6 +10,7 @@ private:
     int width;
     int height;
     bool initialized;
+    uint16_t* rgb_buffer;  // Persistent buffer for 1-bit to RGB565 conversion
     
 public:
     LowLevelDisplayST7796(const st7796_config* cfg, int w, int h);