Disable the ESP32-P4 ISP pipeline controller so its ~30Hz AE loop stops fighting OV5647's built-in AE via V4L2_CID_EXPOSURE. Drop the now-obsolete app_video_disable_af() and the dead CONFIG_LVGL_PORT_ENABLE_PPA symbol.

Widen the on-sensor AE stable band from ±8% to ±30% and cap the gain ceiling at 0x01FF (~32x, analog-gain only) via direct SCCB writes on a second handle sharing the camera I2C bus. Apply the same tuning to entropy capture, which previously inherited defaults.

Skip the focus-motor V4L2 probe on boards without BSP_CAM_HAS_MOTOR to stop "ctrl id=9a090a is not supported" log spam on wave_35/wave_5.

Make the scanner settings overlay non-blending (LV_OPA_TRANSP blocker, LV_OPA_COVER panel) to stop white flashes on wave_5 caused by per-frame alpha blending fighting SCCB writes and MIPI DSI DMA.

Also consolidate shared BSP Kconfig symbols into bsp_common and add breathing room between the last settings slider and the Close button.