Handle splash screen and force main repaint

Capture and remove the LVGL splash screen to avoid leftover objects and force an initial repaint of the main screen before other tasks contend for SPI. Added a splash_screen pointer (lv_screen_active()), invalidate and refresh the main_display immediately (lv_obj_invalidate + lv_refr_now), and delete the splash screen if it differs from the main screen. Also cleaned up .vscode/extensions.json by removing a duplicate PlatformIO recommendation.

Author: zjwhitehead

.vscode/extensions.json

@@ -3,8 +3,7 @@
     // for the documentation about the extensions.json format
     "recommendations": [
         "ms-vscode.cpptools-extension-pack",
-        "pioarduino.pioarduino-ide",
-        "platformio.platformio-ide"
+        "pioarduino.pioarduino-ide"
     ],
     "unwantedRecommendations": [
         "ms-vscode.cpptools-extension-pack"

src/sp140/main.cpp

@@ -769,8 +769,10 @@ void setup() {
   setLEDColor(LED_GREEN);
 
   // Show splash screen (blocking)
+  lv_obj_t* splash_screen = NULL;
   if (xSemaphoreTake(lvglMutex, portMAX_DELAY) == pdTRUE) {
     displayLvglSplash(deviceData, 2000);
+    splash_screen = lv_screen_active();
     // Keep mutex held through main screen setup
   } else {
     USBSerial.println("Failed to acquire LVGL mutex for splash");
@@ -782,9 +784,14 @@ void setup() {
     setupMainScreen(deviceData.theme == 1);
   }
 
-  // Load main screen
+  // Force the first main-screen repaint before other tasks can contend for SPI.
   if (main_screen != NULL) {
-    lv_screen_load(main_screen);
+    lv_obj_invalidate(main_screen);
+    lv_refr_now(main_display);
+    if (splash_screen != NULL && splash_screen != main_screen) {
+      lv_obj_delete(splash_screen);
+      splash_screen = NULL;
+    }
     USBSerial.println("Main screen loaded");
   } else {
     USBSerial.println("Error: Main screen object is NULL after setup attempt");