Bug #9 fix — Add recovery action when radio-stuck is detected
==============================================================
When the radio has been outside RX mode for >8 seconds, the existing
code only sets ERR_EVENT_STARTRX_TIMEOUT.  This patch adds actual
recovery:
  1. If an outbound packet is stuck mid-TX, force-release it
  2. Call onSendFinished() to clean up the radio state (finishTransmit)
  3. The next checkRecv() → recvRaw() → startReceive() restarts RX

This covers:
  • Stuck TX (DIO1 interrupt lost, SPI glitch)
  • startReceive() failure leaving radio in STATE_IDLE
  • Any state where the radio is not in RX for >8s

--- a/src/Dispatcher.cpp
+++ b/src/Dispatcher.cpp
@@ -73,12 +73,25 @@ void Dispatcher::loop() {
   _radio->loop();
 
   // check for radio 'stuck' in mode other than Rx
   bool is_recv = _radio->isInRecvMode();
   if (is_recv != prev_isrecv_mode) {
     prev_isrecv_mode = is_recv;
     if (!is_recv) {
       radio_nonrx_start = _ms->getMillis();
     }
   }
   if (!is_recv && _ms->getMillis() - radio_nonrx_start > 8000) {   // radio has not been in Rx mode for 8 seconds!
     _err_flags |= ERR_EVENT_STARTRX_TIMEOUT;
+
+    // Attempt recovery: if a TX is stuck, force-release it so the
+    // radio can go back into RX mode via checkRecv() → recvRaw().
+    if (outbound) {
+      MESH_DEBUG_PRINTLN("%s Dispatcher::loop(): radio stuck — force-releasing stuck outbound TX", getLogDateTime());
+      _radio->onSendFinished();
+      logTxFail(outbound, 2 + outbound->getPathByteLen() + outbound->payload_len);
+      releasePacket(outbound);
+      outbound = NULL;
+    } else {
+      // No outbound but radio still not in RX — force a sleep/idle cycle
+      // to reset the SX1262 state machine, then let recvRaw() restart RX.
+      MESH_DEBUG_PRINTLN("%s Dispatcher::loop(): radio stuck — forcing radio reset", getLogDateTime());
+      _radio->resetAGC();
+    }
+    radio_nonrx_start = _ms->getMillis();  // avoid firing every loop iteration
   }
 
   if (outbound) {  // waiting for outbound send to be completed