Merge upstream companion-v1.17.1 into power-saving

Pulls in real fixes: scoped-reply routing, RX boosted-gain restored
correctly after AGC reset, T-Echo Lite/Card SPI pin corrections
(unused pins now map to NRFX_SPIM_PIN_NOT_USED via 0 instead of -1)
and TCXO voltage fix, Heltec T096/T1 and MeshPocket pin fixes,
T-beam Supreme S3 display fix, LR2021 preamble/IRQ timeout handling.

None of the touched variants overlap with our active Heltec V3/V4,
Cardputer ADV, GAT562, or WioTracker builds.

# Conflicts:
#	examples/companion_radio/MyMesh.cpp
#	examples/companion_radio/MyMesh.h
#	examples/companion_radio/NodePrefs.h
#	src/helpers/radiolib/CustomSX1262Wrapper.h
#	src/helpers/radiolib/RadioLibWrappers.cpp
#	src/helpers/ui/SH1106Display.cpp
#	variants/lilygo_techo_lite/platformio.ini
#	variants/lilygo_techo_lite/variant.h

examples/companion_radio/MyMesh.cpp

@@ -1608,6 +1608,8 @@ MyMesh::MyMesh(mesh::Radio &radio, mesh::RNG &rng, mesh::RTCClock &rtc, SimpleMe
   seedDefaultRepeaterProfile(_prefs);
   _prefs.gps_enabled = 0;       // GPS disabled by default
   _prefs.gps_interval = 0;      // No automatic GPS updates by default
+  _prefs.radio_fem_rxgain = 1;
+  _prefs.radio_fem_txgain = 0;
   _prefs.display_brightness = 2; // medium brightness by default
   _prefs.buzzer_volume = 4;      // max volume by default
   _prefs.ringtone_bpm_idx = 2;   // 120 bpm default
@@ -1729,6 +1731,8 @@ void MyMesh::begin(bool has_display) {
   applyApc();                                         // sets TX power to the ceiling and arms APC if enabled
   radio_driver.setRxBoostedGainMode(_prefs.rx_boosted_gain);
   radio_driver.setPowerSaving(_prefs.rx_powersave && !_prefs.client_repeat);   // duty-cycle RX off while repeating (must hear all traffic)
+  board.setLoRaFemLnaEnabled(_prefs.radio_fem_rxgain);
+  board.setLoRaFemPaGainEnabled(_prefs.radio_fem_txgain);
   MESH_DEBUG_PRINTLN("RX Boosted Gain Mode: %s",
                      radio_driver.getRxBoostedGainMode() ? "Enabled" : "Disabled");
 }

examples/companion_radio/MyMesh.h

@@ -12,7 +12,7 @@ class UITask;
 #define FIRMWARE_VER_CODE 13
 
 #ifndef FIRMWARE_BUILD_DATE
-#define FIRMWARE_BUILD_DATE "12 Aug 2026"
+#define FIRMWARE_BUILD_DATE "14 Aug 2026"
 #endif
 
 // Fallback only -- every real build (local or CI) goes through build.sh, which

examples/companion_radio/NodePrefs.h

@@ -65,6 +65,14 @@ struct NodePrefs {  // persisted to file
   uint32_t gps_interval;     // GPS duty-cycle sleep window in seconds (0 = disabled, GPS stays continuous)
   uint8_t autoadd_config;    // bitmask for auto-add contacts config
   uint8_t rx_boosted_gain; // SX126x RX boosted gain mode (0=power saving, 1=boosted)
+  // External LoRa FEM gain (LNA/PA), from upstream companion-v1.17.1 —
+  // board-level only right now (BaseCustomBoard::setLoRaFemLnaEnabled/
+  // PaGainEnabled, both default no-op false), no companion CLI/UI to set
+  // these yet, so — matching upstream's own decision — NOT persisted here:
+  // always reset to the constructor default (MyMesh.cpp) on boot. Not part
+  // of the DataStore save/load tripwire below.
+  uint8_t radio_fem_rxgain;
+  uint8_t radio_fem_txgain;
   uint8_t client_repeat;
   uint8_t path_hash_mode;    // which path mode to use when sending
   uint8_t autoadd_max_hops;  // 0 = no limit, 1 = direct (0 hops), N = up to N-1 hops (max 64)