feat(bot): Actions commands, multi-trigger, and user GPIO pins

- Auto-Reply Bot gains Actions (!buzz/!gps/!advert) behind a new per-target
  toggle nested under Commands (bot_actions_dm/ch/room); off by default.
- Bot Trigger fields accept comma-separated multiple phrases, matching any
  one fires the reply.
- New user-assignable GPIO feature (Wio Tracker L1): !gpio1..!gpio4 bot
  commands plus a Tools > GPIO screen. Each pin cycles Off/Input/Output;
  GPIO1/GPIO2 (P0.02/P0.29, the nRF52840's AIN0/AIN5) also offer a read-only
  Analog mode via direct SAADC access. GPIO3/GPIO4 (P0.09/P0.10) are the
  chip's NFC1/NFC2 pins, repurposed as plain GPIO via a one-time UICR
  NFCPINS bit-clear in initVariant() (adapted from Adafruit's own
  nfc_to_gpio example) -- confirmed working on real hardware.
- Fix: DM/room reply-prefix ("@[nick] ") stripping happened at the wrong
  layer, hiding the "To:" header on DM replies and leaking the raw prefix
  into room messages' list view; a related mismatch had the history
  scrollbar's sizing pass wrap room messages with the sender name still
  attached, disagreeing with the actual rendered text.

Build-verified: WioTrackerL1_companion_solo_dual and
WioTrackerL1Eink_companion_solo_dual both compile and link clean
(sizeof(NodePrefs) confirmed 2720 via real build, not guessed).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

examples/companion_radio/ui-new/UITask.h

@@ -45,6 +45,10 @@ class UITask : public AbstractUITask {
   bool _lock_seq_used;             // true = suppress next back_btn CLICK (post-sequence release)
   char _alert[80];
   char _notif_mel_buf[220];  // persistent RTTTL buffer for custom notification melodies
+  // Persistent RTTTL buffer for the bot !buzz command (see botBuzz()) -- sized
+  // for the full 30s cap: "Buzz:b=120:" (11B) + up to 60 "8c,8p," pairs (6B
+  // each) + NUL = 372B, rounded up with margin.
+  char _bot_buzz_buf[400];
   KeyboardWidget _kb;        // shared across all screens — only one active at a time
   unsigned long _alert_expiry;
   int _msgcount;
@@ -91,6 +95,9 @@ class UITask : public AbstractUITask {
   UIScreen* diag_screen = nullptr;
   UIScreen* repeater_screen = nullptr;
   UIScreen* clock_tools = nullptr;
+#if defined(PIN_GPIO1)
+  UIScreen* gpio_screen = nullptr;
+#endif
   UIScreen* curr = nullptr;
   CayenneLPP _dash_lpp;
   TrailStore _trail;
@@ -287,6 +294,7 @@ public:
   void gotoCompassScreen();
   void gotoDiagnosticsScreen();
   void gotoRepeaterScreen();
+  void gotoGpioScreen();   // no-op on boards without user GPIO pins (see PIN_GPIO1)
   void gotoClockTools();   // Alarm / Timer / Stopwatch (from the home Clock page)
   // Wake the display for an alarm/timer ring (force an immediate refresh).
   void wakeForAlarm();
@@ -410,6 +418,17 @@ public:
   bool getGPSState();
   bool hasGPS();   // true if this board exposes a toggleable GPS (distinct from GPS being off)
   void toggleGPS();
+  void applyGpsState(bool on);   // shared by toggleGPS() and botSetGPS()
+  void botSetGPS(bool on) override;
+  void botBuzz(int seconds) override;
+  // User GPIO (!gpio1..!gpio4 + Tools > GPIO screen). idx is 1-4. Bodies are
+  // no-ops / return false on boards without PIN_GPIO1 defined.
+  bool botSetGPIO(int idx, bool on) override;
+  bool botGetGPIO(int idx, bool& is_output, bool& value) override;
+  bool botGetGPIOAnalog(int idx, int& millivolts) override;
+  bool gpioSupportsAnalog(int idx) const;    // true only for GPIO1/GPIO2 (AIN0/AIN5)
+  void setGpioMode(int idx, uint8_t mode);   // 0=Off 1=In 2=Out-low 3=Out-high 4=Analog; applies + persists
+  void applyAllGpioModes();                  // boot-time restore from NodePrefs, called from begin()
   void applyBrightness();
   void setBrightnessLevel(uint8_t level);
   uint8_t getBrightnessLevel() const { return _node_prefs ? _node_prefs->display_brightness : 2; }