Merge upstream companion-v1.18.0

Fixes and features from upstream: MACThenDecrypt / command buffer
overflow fixes, ACK forwarding delay, transport code 0 as unscoped,
hidden nodes don't answer DISCOVER, LR2021/LR1121 fixes, GPS cold-start
detection and waitFor()/drain(), NMEA fix-age counters, ESP32 RTC after a
crash, remote CLI by text message (TXT_TYPE_CLI_COMMAND),
PUSH_CODE_BINARY_RESPONSE, board.loop(), new boards (Wio Tracker L1 1W,
ThinkNode M4/M8, Muzi Base, Waveshare LR1121, Pico W).

Kept ours: NodePrefs, main.cpp, every UI, GxEPDDisplay. The companion CLI
stays MyMeshCli.h's handleCliCommand(); upstream's handleCommand() calls
it. The board's FEM gains go through attachDynamicPrefs() with an adapter
over our NodePrefs fields. Upstream's JSON prefs and MultiSerialInterface
come as their own stages.

Also: the display defaults were inside RADIO_FEM_TXGAIN's #else (a
missing #endif).

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

variants/heltec_t096/T096Board.cpp

@@ -131,10 +131,50 @@ bool T096Board::setLoRaFemLnaEnabled(bool enable) {
   return true;
 }
 
-bool T096Board::canControlLoRaFemLna() const {
-  return loRaFEMControl.isLnaCanControl();
-}
-
 bool T096Board::isLoRaFemLnaEnabled() const {
   return loRaFEMControl.isLNAEnabled();
 }
+
+void T096Board::attachDynamicPrefs(KeyValueStore* prefs) {
+  _prefs = prefs;
+
+  char radio_fem_rxgain[8] = { 0 };
+  _prefs->getByKey("fem_rxgain", radio_fem_rxgain, 7);  // get initial values
+
+  setLoRaFemLnaEnabled(strcmp(radio_fem_rxgain, "1") == 0);
+}
+
+bool T096Board::handleCommand(const char* command, uint32_t sender_timestamp, char* reply) {
+  if (strcmp(command, "get radio.fem.rxgain") == 0) {
+    if (!loRaFEMControl.isLnaCanControl()) {
+      strcpy(reply, "Error: unsupported");
+    } else {
+      sprintf(reply, "> %s", isLoRaFemLnaEnabled() ? "on" : "off");
+    }
+    return true;
+  }
+  if (memcmp(command, "set radio.fem.rxgain ", 21) == 0) {
+    if (!loRaFEMControl.isLnaCanControl()) {
+      strcpy(reply, "Error: unsupported");
+    } else if (memcmp(&command[21], "on", 2) == 0) {
+      if (setLoRaFemLnaEnabled(true)) {
+        _prefs->setByKey("fem_rxgain", "1");
+        strcpy(reply, "OK - LoRa FEM RX gain on");
+      } else {
+        strcpy(reply, "Error: failed to apply LoRa FEM RX gain");
+      }
+    } else if (memcmp(&command[21], "off", 3) == 0) {
+      if (setLoRaFemLnaEnabled(false)) {
+        _prefs->setByKey("fem_rxgain", "0");
+        strcpy(reply, "OK - LoRa FEM RX gain off");
+      } else {
+        strcpy(reply, "Error: failed to apply LoRa FEM RX gain");
+      }
+    } else {
+      strcpy(reply, "Error: state must be on or off");
+    }
+    return true;
+  }
+
+  return false; // not handled
+}

variants/heltec_t096/T096Board.h

@@ -4,28 +4,33 @@
 #include <Arduino.h>
 #include <helpers/NRF52Board.h>
 #include <helpers/RefCountedDigitalPin.h>
+#include <helpers/KeyValueStore.h>
 #include "LoRaFEMControl.h"
 
 class T096Board : public NRF52BoardDCDC {
+  KeyValueStore* _prefs = NULL;
+
 protected:
 #ifdef NRF52_POWER_MANAGEMENT
   void initiateShutdown(uint8_t reason) override;
 #endif
   void variant_shutdown();
 
+  bool setLoRaFemLnaEnabled(bool enable);
+  bool isLoRaFemLnaEnabled() const;
+
 public:
   RefCountedDigitalPin periph_power;
   LoRaFEMControl loRaFEMControl;
 
   T096Board() :periph_power(PIN_VEXT_EN,PIN_VEXT_EN_ACTIVE), NRF52Board("T096_OTA") {}
   void begin();
+  void attachDynamicPrefs(KeyValueStore* prefs);
+  bool handleCommand(const char* command, uint32_t sender_timestamp, char* reply) override;
 
   void onBeforeTransmit(void) override;
   void onAfterTransmit(void) override;
   uint16_t getBattMilliVolts() override;
   const char* getManufacturerName() const override ;
   void powerOff() override;
-  bool setLoRaFemLnaEnabled(bool enable) override;
-  bool canControlLoRaFemLna() const override;
-  bool isLoRaFemLnaEnabled() const override;
 };

variants/heltec_t096/platformio.ini

@@ -9,7 +9,6 @@ build_flags = ${nrf52_base.build_flags}
   -I variants/heltec_t096
   -I src/helpers/ui
   -D HELTEC_T096
-  -D NRF52_POWER_MANAGEMENT
   -D P_LORA_DIO_1=21
   -D P_LORA_NSS=5
   -D P_LORA_RESET=16