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>

variants/wio-tracker-l1/variant.h

@@ -91,6 +91,17 @@
 #define PIN_GPS_STANDBY         (0)
 #define PIN_GPS_EN              (PIN_GPS_STANDBY)
 
+// User-assignable GPIO: 4 pins with no board function, exposed for bot
+// commands (!gpio1..!gpio4) and the Tools > GPIO screen. Raw nRF52 pin
+// addressing via NRF_GPIO_PIN_MAP (NOT Arduino pin numbers -- these aren't in
+// g_ADigitalPinMap[], so pinMode()/digitalWrite() would silently hit whatever
+// Arduino pin index happens to equal the raw value instead). See
+// initVariant()'s ensureNfcPinsAsGpio() for the GPIO3/GPIO4 NFC-pin caveat.
+#define PIN_GPIO1               NRF_GPIO_PIN_MAP(0, 2)
+#define PIN_GPIO2               NRF_GPIO_PIN_MAP(0, 29)
+#define PIN_GPIO3               NRF_GPIO_PIN_MAP(0, 9)    // NFC1
+#define PIN_GPIO4               NRF_GPIO_PIN_MAP(0, 10)   // NFC2
+
 // QSPI Pins
 #define PIN_QSPI_SCK            (19)
 #define PIN_QSPI_CS             (20)