Merge upstream/main (v1.16.0) into wio-unified

Merge 254 upstream commits. Highlights relevant to the Wio fork: native
NRF52 companion power-saving (sleep when !hasPendingWork), preamble 16->32
for SF<9, generic sensor-registration model, CMD_SEND_RAW_PACKET, isEink()
display abstraction, KEEP_DISPLAY_ON_USB, contacts-sync/transient fixes.

Conflicts resolved (11 files):
- buzzer.h/.cpp: keep NRF52 include guard + our begin()->startup(); fold in
  upstream doc comment.
- platformio (wio + eink): keep our slim env layout, add upstream kiss_modem
  env (+ debug_tool=stlink on eink ble).
- GxEPDDisplay.h: take upstream isEink() override.
- EnvironmentSensorManager.h: take upstream's wider #if guard.
- DataStore.cpp: take upstream saveContacts(filter) signature, keep our
  ::openWrite (member openWrite would shadow the global 2-arg overload).
- main.cpp: keep our watchdog init + add board.onBootComplete(); adopt
  upstream's `if(!hasPendingWork()) sleep` loop.
- MyMesh.h: version -> v1.16-solo.0, build date 6 Jun 2026.
- MyMesh.cpp: keep both CMD codes (SCREENSHOT 66 + RAW_PACKET 65), both field
  inits, both handlers, our screenshot fns + upstream saveContacts/save_filter,
  upstream hasPendingWork() + our MyMeshBot include.
- UITask.cpp: keep our solo splash/clock page/snprintf/buzzer init; merge
  auto-off (+ opt-in KEEP_DISPLAY_ON_USB); merge low-batt shutdown (our EMA +
  prefs threshold + upstream's !isExternalPowered() guard and eink-aware delay).

Post-merge drift fixes (upstream API/architecture changes, not conflicts):
- applyTxPower(): radio_set_tx_power() removed upstream -> radio_driver.setTxPower().
- Sensor refactor dropped the per-sensor *_initialized flags our
  getAvailableLPPTypes() relied on; removed that override and the SENSORS page
  now derives available LPP types from the populated sensors_lpp buffer.

README kept ours via .gitattributes merge=ours. Builds verified on all 5 Wio
envs (dual, eink dual, radio_ble, dual_dev, eink_dual_dev). Not yet
hardware-verified.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.github/workflows/pr-build-check.yml

@@ -42,6 +42,10 @@ jobs:
           - wio-e5-mini_repeater
           # ESP32-C6
           - LilyGo_Tlora_C6_repeater_
+          # LR1110 (nRF52)
+          - wio_wm1110_repeater
+          # SX1276 (ESP32)
+          - Tbeam_SX1276_repeater
 
     steps:
       - name: Clone Repo

.github/workflows/run-unit-tests.yml

@@ -0,0 +1,31 @@
+name: Run Unit Tests
+
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Clone Repo
+        uses: actions/checkout@v4
+
+      - name: Setup Build Environment
+        uses: ./.github/actions/setup-build-environment
+
+      - name: Run Unit Tests
+        run: pio test -e native -vv
+
+      - name: Upload Test Results
+        # Upload test results even if the test step failed.
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-results
+          path: .pio/build/native/