ec556fdd2a
SGM_CTRL was turned on at the very start of LCD_Init(), before the ST7789V register sequence and first frame ran, showing garbage/blank content briefly on every boot. GPIO_Init() now forces backlight off at power-on, LCD_Init() no longer touches it, and main() only turns it on right before entering the main loop (after HomeApp's first frame is drawn). Wakeup_Restore()'s existing on-then-reinit sequence is untouched since it sets the level itself before calling LCD_Init().