Add BLE pairing screenshot tests and icon pos

Adjust BLE pairing icon placement in the main screen (use lv_obj_set_pos(103,72) instead of lv_obj_align) and add test coverage for the BLE pairing indicator. Tests include light and dark screenshot cases plus reference BMPs. Also update the emulator teardown to clear ble_pairing_icon, its flash timer and flash state so tests start from a clean state.

Author: zjwhitehead

src/sp140/lvgl/lvgl_main_screen.cpp

@@ -530,7 +530,7 @@ void setupMainScreen(bool darkMode) {
   lv_label_set_text(ble_pairing_icon, LV_SYMBOL_BLUETOOTH);
   lv_obj_set_style_text_font(ble_pairing_icon, &lv_font_montserrat_14, 0);
   lv_obj_set_style_text_color(ble_pairing_icon, LVGL_BLUE, 0);
-  lv_obj_align(ble_pairing_icon, LV_ALIGN_RIGHT_MID, -20, 11);
+  lv_obj_set_pos(ble_pairing_icon, 103, 72);
   lv_obj_add_flag(ble_pairing_icon, LV_OBJ_FLAG_HIDDEN);  // Hide initially
 
   // Create climb rate indicator horizontal divider lines in the far-right section

test/test_screenshots/emulator_display.cpp

@@ -334,6 +334,7 @@ void emulator_teardown() {
   cruise_icon_img = NULL;
   charging_icon_img = NULL;
   arm_fail_warning_icon_img = NULL;
+  ble_pairing_icon = NULL;
   for (int i = 0; i < 13; i++) climb_rate_divider_lines[i] = NULL;
   for (int i = 0; i < 12; i++) climb_rate_fill_sections[i] = NULL;
   critical_border = NULL;
@@ -358,15 +359,19 @@ void emulator_teardown() {
   extern lv_timer_t* cruise_flash_timer;
   extern lv_timer_t* arm_fail_flash_timer;
   extern lv_timer_t* critical_border_flash_timer;
+  extern lv_timer_t* ble_pairing_flash_timer;
   extern bool isFlashingCruiseIcon;
   extern bool isFlashingArmFailIcon;
   extern bool isFlashingCriticalBorder;
+  extern bool isFlashingBLEPairingIcon;
   cruise_flash_timer = NULL;
   arm_fail_flash_timer = NULL;
   critical_border_flash_timer = NULL;
+  ble_pairing_flash_timer = NULL;
   isFlashingCruiseIcon = false;
   isFlashingArmFailIcon = false;
   isFlashingCriticalBorder = false;
+  isFlashingBLEPairingIcon = false;
 
   memset(framebuffer, 0, sizeof(framebuffer));
 }

test/test_screenshots/reference/main_ble_pairing_dark.bmp

@@ -554,6 +554,48 @@ TEST_F(ScreenshotTest, MainScreen_CriticalAlerts_Dark) {
   save_and_compare("main_critical_alerts_dark");
 }
 
+// ============================================================
+// BLE pairing icon tests
+// ============================================================
+
+TEST_F(ScreenshotTest, MainScreen_BLEPairing_Light) {
+  auto dd = make_default_device_data(false);
+  auto esc = make_esc_connected();
+  auto bms = make_bms_connected();
+  auto ubd = make_unified_battery(72.0f, 88.5f, 0.0f);
+
+  emulator_init_display(false);
+  setupMainScreen(false);
+  updateLvglMainScreen(dd, esc, bms, ubd, 0.0f, false, false, 0);
+
+  // Show BLE pairing icon (normally toggled by flash timer)
+  if (ble_pairing_icon != NULL) {
+    lv_obj_remove_flag(ble_pairing_icon, LV_OBJ_FLAG_HIDDEN);
+  }
+
+  emulator_render_frame();
+  save_and_compare("main_ble_pairing_light");
+}
+
+TEST_F(ScreenshotTest, MainScreen_BLEPairing_Dark) {
+  auto dd = make_default_device_data(true);
+  auto esc = make_esc_connected();
+  auto bms = make_bms_connected();
+  auto ubd = make_unified_battery(72.0f, 88.5f, 0.0f);
+
+  emulator_init_display(true);
+  setupMainScreen(true);
+  updateLvglMainScreen(dd, esc, bms, ubd, 0.0f, false, false, 0);
+
+  // Show BLE pairing icon (normally toggled by flash timer)
+  if (ble_pairing_icon != NULL) {
+    lv_obj_remove_flag(ble_pairing_icon, LV_OBJ_FLAG_HIDDEN);
+  }
+
+  emulator_render_frame();
+  save_and_compare("main_ble_pairing_dark");
+}
+
 // ============================================================
 // Splash screen tests (recreated from lvgl_core.cpp displayLvglSplash)
 // Uses VERSION_MAJOR/VERSION_MINOR from version.h so references