feat(web,mqtt): add repeater dashboard, MQTT settings, and stabilise HTTPS/TLS startup

src/Dispatcher.cpp

@@ -88,6 +88,9 @@ void Dispatcher::loop() {
       total_air_time += t;
       //Serial.print("  airtime="); Serial.println(t);
 
+      // A completed transmit means the radio recovered from any prior CAD stall.
+      _err_flags &= ~ERR_EVENT_CAD_TIMEOUT;
+
       updateTxBudget();
 
       if (t > tx_budget_ms) {
@@ -386,4 +389,4 @@ unsigned long Dispatcher::futureMillis(int millis_from_now) const {
   return _ms->getMillis() + millis_from_now;
 }
 
-}
+}