feat(platform): integrate st7789 boot test display and board gpio mapping

README.md

@@ -98,6 +98,24 @@ In `menuconfig -> TQ Controller Config`:
   - `TQ_VOICE_OPUS_BITRATE_KBPS`
   - `TQ_VOICE_I2C_*` / `TQ_VOICE_I2S_*`
   - `TQ_VOICE_CODEC_*`
+- Board GPIO map fields:
+  - `TQ_POWER_*`, `TQ_LED_*`, `TQ_SCREEN_*`, `TQ_PRINT_*`, `TQ_SPI_*`
+  - `TQ_KEY_PRINT_BOOST_ENABLE_ON_BOOT` / `TQ_KEY_PRINT_BOOST_ACTIVE_HIGH`
+- ST7789 screen fields:
+  - `TQ_SCREEN_ENABLE`
+  - `TQ_SCREEN_TEST_PATTERN_ON_BOOT`
+  - `TQ_SCREEN_PIXEL_CLOCK_HZ`
+  - `TQ_SCREEN_SPI_MODE`
+  - `TQ_SCREEN_H_RES` / `TQ_SCREEN_V_RES`
+  - `TQ_SCREEN_DRAW_LINES`
+  - `TQ_SCREEN_COLOR_ORDER_BGR`
+  - `TQ_SCREEN_BACKLIGHT_ACTIVE_HIGH`
+  - `TQ_SCREEN_MIRROR_*` / `TQ_SCREEN_SWAP_XY`
+  - `TQ_SCREEN_X_GAP` / `TQ_SCREEN_Y_GAP`
+  - `TQ_SCREEN_RESET_PIN`
+
+Board pin assignment reference:
+- [`docs/gpio-map.md`](docs/gpio-map.md)
 
 When `TQ_API_KEY` is not empty, each request must include: