Add OLED and button diagnostics

src/main.c

@@ -5,6 +5,7 @@
 #include "esp_log.h"
 #include "esp_psram.h"
 #include "network_console.h"
+#include "local_ui_hw_test.h"
 #include "rs232_hw_test.h"
 #include "rs232_port_owner.h"
 #include "secure_random.h"
@@ -35,7 +36,7 @@ static const char *TAG = "firmware";
 
 void app_main(void)
 {
-    ESP_LOGI(TAG, "ESP32-S3 Serial Swiss Army Knife SSH transport phase started");
+    ESP_LOGI(TAG, "ESP32-S3 Serial Swiss Army Knife Phase 7A diagnostics started");
 
     if (esp_psram_is_initialized()) {
         ESP_LOGI(TAG, "PSRAM initialized: %u bytes", (unsigned int)esp_psram_get_size());
@@ -55,6 +56,13 @@ void app_main(void)
     ESP_ERROR_CHECK(rs232_port_owner_init());
     ESP_ERROR_CHECK(rs232_hw_test_init());
 
+    /* A missing or miswired optional display must never remove recovery paths. */
+    esp_err_t local_ui_error = local_ui_hw_test_init();
+    if (local_ui_error != ESP_OK) {
+        ESP_LOGW(TAG, "Local UI diagnostics unavailable: %s",
+                 esp_err_to_name(local_ui_error));
+    }
+
     serial_config_t serial_config;
     bool used_stored_config = false;
     esp_err_t config_error = serial_config_load(&serial_config, &used_stored_config);