v1.4.0: LVGL UI, async radio TX, live TCP management, input fixes

- Migrate all screens to LVGL v8.4 widget system
- Non-blocking radio TX (async endPacket via LoRaInterface)
- Live TCP server switching with transient node cleanup
- Fix UI freeze during radio transmit
- Trackball long-press delete, deferred click with debounce
- Pin microReticulum to 392363c, fix list_directory API
- Fix CI build: portable include path, remove hardcoded local path

src/transport/TCPClientInterface.cpp

@@ -42,8 +42,9 @@ void TCPClientInterface::tryConnect() {
 void TCPClientInterface::loop() {
     if (!_online) return;
 
-    // Auto-reconnect
+    // Auto-reconnect (only if WiFi is connected)
     if (!_client.connected()) {
+        if (WiFi.status() != WL_CONNECTED) return;
         if (millis() - _lastAttempt >= TCP_RECONNECT_INTERVAL_MS) {
             tryConnect();
         }