display: fix font bit-order (MSB=left) and remove panel mirror; rfid: probe uses HALFDUPLEX so VersionReg read is valid

main/rfid_manager.c

@@ -87,6 +87,7 @@ static void rfid_probe_version(void)
         .command_bits = 1,   /* read/write select bit */
         .address_bits = 6,   /* register address */
         .dummy_bits = 1,
+        .flags = SPI_DEVICE_HALFDUPLEX, /* RX-only reads like the rc522 driver */
     };
     if (spi_bus_add_device(HW_RFID_SPI_HOST, &devcfg, &probe) != ESP_OK || probe == NULL) {
         ESP_LOGW(TAG, "probe: could not add temp SPI device on SPI3");