refactor: move TileLayoutHelper from DisplayManager.h to Style.h

- Pure static helper class moved from DisplayManager.h to Style.h
- Drivers now use TileLayoutHelper::calculateLayouts() directly
- Remove extern DisplayManager references from display drivers
- Drop LGFX_USE_V1 build flag (no longer needed)
- Add delay(LOOP_YIELD_MS) in S3 loop to prevent watchdog

boards/esp32-s3-lcd-43/esp32-s3-lcd-43.ino

@@ -38,4 +38,7 @@ void loop() {
 
     // Serial console
     logic.processSerial();
+
+    // Yield to WiFi/BT stack
+    delay(LOOP_YIELD_MS);
 }