Fix USB MIDI enumeration: switch from ARDUINO_USB_MODE=1 to 0 (matches working Adafruit TinyUSB example), add explicit TinyUSBDevice.begin(0) and detach/attach re-enumeration, remove conflicting tusb_config.h

src/midi_transport.cpp

@@ -13,15 +13,25 @@ UsbMidiTransport::~UsbMidiTransport() {
 bool UsbMidiTransport::begin() {
     Serial.println("[MIDI] Setting up USB MIDI device...");
 
+    if (!TinyUSBDevice.isInitialized()) {
+        TinyUSBDevice.begin(0);
+    }
+
     TinyUSBDevice.setManufacturerDescriptor("Ashley Strahle");
     TinyUSBDevice.setProductDescriptor("Loopy Foot Controller");
     TinyUSBDevice.setSerialDescriptor("LFMIDI001");
 
-    if (!usb_midi.begin(32)) {
+    if (!usb_midi.begin()) {
         Serial.println("[MIDI] ERROR: USB MIDI init failed");
         return false;
     }
 
+    if (TinyUSBDevice.mounted()) {
+        TinyUSBDevice.detach();
+        delay(10);
+        TinyUSBDevice.attach();
+    }
+
     initialized = true;
     Serial.println("[MIDI] USB MIDI ready - enumerating...");
     return true;