fix(companion): CLI NaN, APC on TX changes, tz-aware alarm, late ACKs, ping timeout and widths, TX limits

- set af / dutycycle / rxdelay reject nan.
- A TX power change from the app or CLI re-baselines APC.
- CMD_SET_RADIO_PARAMS stores repeat as 0/1.
- The alarm reschedules itself when the time zone changes.
- A late ACK for an earlier DM attempt marks it delivered.
- A new auto-advert interval counts from the last advert.
- Both UIs take the TX power range from radioctl, up to MAX_LORA_TX_POWER
  (30 dBm on the GAT562 30S).
- The ping timeout comes from the airtime; 3-byte path hash mode pings with
  4-byte trace hashes, and trace flags are right for width 4.

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

examples/companion_radio/ui-new/UITask.h

@@ -473,6 +473,7 @@ public:
   // Ping helpers (engine in ui-core/PingEngine.h)
   bool startPing(const uint8_t* pub_key);
   bool isPingActive() const;
+  uint32_t pingTimeoutMs() const;
   void getPingResult(int16_t& snr_out_x4, int16_t& snr_back_x4, uint32_t& rtt_ms) const;
   void clearPing();