♻️ refactor: unify UI notification methods into single notify() function

Consolidates soundBuzzer() and triggerVibration() into a unified notify() method
that handles both audio and haptic feedback based on UIEventType.

examples/companion_radio/AbstractUITask.h

@@ -41,9 +41,6 @@ public:
   void disableSerial() { _serial->disable(); }
   virtual void msgRead(int msgcount) = 0;
   virtual void newMsg(uint8_t path_len, const char* from_name, const char* text, int msgcount) = 0;
-  virtual void soundBuzzer(UIEventType bet = UIEventType::none) = 0;
-#ifdef PIN_VIBRATION
-  virtual void triggerVibration() = 0;
-#endif
+  virtual void notify(UIEventType t = UIEventType::none) = 0;
   virtual void loop() = 0;
 };