Add reboot command and late terminal activation

src/main.c

@@ -13,6 +13,7 @@
 #include "session_broker.h"
 #include "session_console.h"
 #include "status_led.h"
+#include "system_console.h"
 #include "usb_cdc_transport.h"
 #include "usb_console.h"
 #include "wifi_config.h"
@@ -132,7 +133,8 @@ void app_main(void)
     ESP_ERROR_CHECK(usb_console_register_commands());
     ESP_ERROR_CHECK(wifi_console_register_commands());
     ESP_ERROR_CHECK(network_console_register_root_commands());
-    /* ESP-IDF handles root completion; this wrapper adds nested subcommands. */
+    ESP_ERROR_CHECK(system_console_register_commands());
+    /* Upgrade late UART terminals safely and add nested completion. */
     console_completion_install();
     ESP_ERROR_CHECK(esp_console_start_repl(repl));