Add Panel-Aware Local OLED Display Service

src/local_ui_hw_test.h

@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-3.0-only */
-/* Phase 7A local display and button electrical diagnostics. */
+/* Phase 7A local display/button diagnostics retained for Phase 7B validation. */
 
 #pragma once
 
@@ -9,7 +9,7 @@
 extern "C" {
 #endif
 
-/* Configure the shared I2C bus and active-low button inputs without probing. */
+/* Configure active-low button inputs; the Phase 7B display service owns I2C. */
 esp_err_t local_ui_hw_test_init(void);
 
 /* Handle argv beginning with either "display" or "buttons". */