Convert all projects to PlatformIO

- JC3636W518 sketches: pioarduino 51.03.05 (Arduino core 3.0.5), ESP32-S3
  16MB QIO / OPI PSRAM, vendor libs via lib_extra_dirs, per-project lv_conf.h
- display_gif_embedded uses default_16MB.csv (firmware 3.4 MB > huge_app)
- elm327_wifi_bridge: espressif32 6.10.0 on esp32dev, pinned lib_deps
- elmulator: library in lib/, one env per example, duplicate copies removed
- .ino -> src/main.cpp, headers/lv_conf.h -> include/

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2-Program Example/Demo_Arduino/sd/platformio.ini

@@ -0,0 +1,25 @@
+; JC3636W518 — ESP32-S3R8, 16 MB QIO flash, 8 MB OPI PSRAM, 360x360 ST77916 QSPI + CST816S
+; Settings mirror the vendor Arduino IDE setup (2-Program Example/Demo_Arduino/docs/Arduino set up.png)
+
+[env:jc3636w518]
+; pioarduino = Arduino core 3.0.5 (ESP32_Display_Panel 0.1.4 needs core 3.x)
+platform = https://github.com/pioarduino/platform-espressif32/releases/download/51.03.05/platform-espressif32.zip
+board = esp32-s3-devkitc-1
+framework = arduino
+
+board_build.arduino.memory_type = qio_opi
+board_build.flash_mode = qio
+board_upload.flash_size = 16MB
+board_build.partitions = huge_app.csv
+
+build_flags =
+    -DBOARD_HAS_PSRAM
+    -DARDUINO_USB_CDC_ON_BOOT=1
+
+; vendor-bundled libraries (not needed by this sketch, kept for consistency)
+lib_extra_dirs = ../library
+
+upload_port = COM21
+monitor_port = COM21
+monitor_speed = 115200
+monitor_filters = esp32_exception_decoder

2-Program Example/Demo_Arduino/sd/src/main.cpp

@@ -1,75 +1,76 @@
-#include "pincfg.h"
-
-#include "SD_MMC.h"
-// #include "FS.h"
-
-void listDir(fs::FS &fs, const char *dirname, uint8_t levels) {
-  Serial.printf("Listing directory: %s\n", dirname);
-
-  File root = fs.open(dirname);
-  if (!root) {
-    Serial.println("Failed to open directory");
-    return;
-  }
-  if (!root.isDirectory()) {
-    Serial.println("Not a directory");
-    return;
-  }
-
-  File file = root.openNextFile();
-  while (file) {
-    if (file.isDirectory()) {
-      Serial.print("  DIR : ");
-      Serial.println(file.name());
-      if (levels) {
-        listDir(fs, file.path(), levels - 1);
-      }
-    } else {
-      Serial.print("  FILE: ");
-      Serial.print(file.name());
-      Serial.print("  SIZE: ");
-      Serial.println(file.size());
-    }
-    file = root.openNextFile();
-  }
-}
-
-void setup() {
-  delay(200);
-  Serial.begin(115200);
-
-  // Configure the SDMMC host
-  SD_MMC.setPins(SD_MMC_CLK_PIN, SD_MMC_CMD_PIN, SD_MMC_D0_PIN, SD_MMC_D1_PIN, SD_MMC_D2_PIN, SD_MMC_D3_PIN);
-
-  if (!SD_MMC.begin()) {
-    Serial.println("Card Mount Failed");
-    return;
-  }
-
-  uint8_t cardType = SD_MMC.cardType();
-  if (cardType == CARD_NONE) {
-    Serial.println("No SD card attached");
-    return;
-  }
-
-  Serial.println("SD Card initialized successfully.");
-
-  Serial.print("SD_MMC Card Type: ");
-  if (cardType == CARD_MMC) {
-    Serial.println("MMC");
-  } else if (cardType == CARD_SD) {
-    Serial.println("SDSC");
-  } else if (cardType == CARD_SDHC) {
-    Serial.println("SDHC");
-  } else {
-    Serial.println("UNKNOWN");
-  }
-
-  uint64_t cardSize = SD_MMC.cardSize() / (1024 * 1024);
-  Serial.printf("SD_MMC Card Size: %lluMB\n", cardSize);
-
-  listDir(SD_MMC, "/", 0);
-}
-
-void loop() {
-}
+#include <Arduino.h>
+#include "pincfg.h"
+
+#include "SD_MMC.h"
+// #include "FS.h"
+
+void listDir(fs::FS &fs, const char *dirname, uint8_t levels) {
+  Serial.printf("Listing directory: %s\n", dirname);
+
+  File root = fs.open(dirname);
+  if (!root) {
+    Serial.println("Failed to open directory");
+    return;
+  }
+  if (!root.isDirectory()) {
+    Serial.println("Not a directory");
+    return;
+  }
+
+  File file = root.openNextFile();
+  while (file) {
+    if (file.isDirectory()) {
+      Serial.print("  DIR : ");
+      Serial.println(file.name());
+      if (levels) {
+        listDir(fs, file.path(), levels - 1);
+      }
+    } else {
+      Serial.print("  FILE: ");
+      Serial.print(file.name());
+      Serial.print("  SIZE: ");
+      Serial.println(file.size());
+    }
+    file = root.openNextFile();
+  }
+}
+
+void setup() {
+  delay(200);
+  Serial.begin(115200);
+
+  // Configure the SDMMC host
+  SD_MMC.setPins(SD_MMC_CLK_PIN, SD_MMC_CMD_PIN, SD_MMC_D0_PIN, SD_MMC_D1_PIN, SD_MMC_D2_PIN, SD_MMC_D3_PIN);
+
+  if (!SD_MMC.begin()) {
+    Serial.println("Card Mount Failed");
+    return;
+  }
+
+  uint8_t cardType = SD_MMC.cardType();
+  if (cardType == CARD_NONE) {
+    Serial.println("No SD card attached");
+    return;
+  }
+
+  Serial.println("SD Card initialized successfully.");
+
+  Serial.print("SD_MMC Card Type: ");
+  if (cardType == CARD_MMC) {
+    Serial.println("MMC");
+  } else if (cardType == CARD_SD) {
+    Serial.println("SDSC");
+  } else if (cardType == CARD_SDHC) {
+    Serial.println("SDHC");
+  } else {
+    Serial.println("UNKNOWN");
+  }
+
+  uint64_t cardSize = SD_MMC.cardSize() / (1024 * 1024);
+  Serial.printf("SD_MMC Card Size: %lluMB\n", cardSize);
+
+  listDir(SD_MMC, "/", 0);
+}
+
+void loop() {
+}