Enhances buzzer audibility on small piezos

Adjusts the duration and tempo of several buzzer melodies to make them more perceptible. Specifically, the advert sent and generic toggle sounds are modified with longer note durations and slower tempos, improving their clarity on typical small piezo speakers.

examples/companion_radio/ui-new/UITask.cpp

@@ -610,7 +610,7 @@ switch(t){
     buzzer.play("ack:d=32,o=8,b=120:c");
     break;
   case UIEventType::advertSent:
-    buzzer.play("Advert:d=16,o=6,b=240:c,e,g,c7");
+    buzzer.play("Advert:d=8,o=6,b=180:c,e,g,c7");
     break;
   case UIEventType::roomMessage:
   case UIEventType::newContactMessage:

examples/companion_radio/ui-orig/UITask.cpp

@@ -104,7 +104,7 @@ switch(t){
     buzzer.play("ack:d=32,o=8,b=120:c");
     break;
   case UIEventType::advertSent:
-    buzzer.play("Advert:d=16,o=6,b=240:c,e,g,c7");
+    buzzer.play("Advert:d=8,o=6,b=180:c,e,g,c7");
     break;
   case UIEventType::roomMessage:
   case UIEventType::newContactMessage:

examples/companion_radio/ui-tiny/UITask.cpp

@@ -482,7 +482,7 @@ switch(t){
     buzzer.play("ack:d=32,o=8,b=120:c");
     break;
   case UIEventType::advertSent:
-    buzzer.play("Advert:d=16,o=6,b=240:c,e,g,c7");
+    buzzer.play("Advert:d=8,o=6,b=180:c,e,g,c7");
     break;
   case UIEventType::roomMessage:
   case UIEventType::newContactMessage:

src/helpers/ui/buzzer.cpp

@@ -50,7 +50,8 @@ void genericBuzzer::playToggle(int count, bool enabled) {
     if (count < 1) count = 1;
     if (count > max_notes) count = max_notes;
     char melody[64];
-    int n = snprintf(melody, sizeof(melody), "Tg:d=16,o=6,b=200:");
+    // d=8 (eighths) at b=180 -> ~166 ms per note, audible on small piezos.
+    int n = snprintf(melody, sizeof(melody), "Tg:d=8,o=6,b=180:");
     for (int i = 0; i < count && n < (int)sizeof(melody); i++) {
         int idx = enabled ? i : (count - 1 - i);
         n += snprintf(melody + n, sizeof(melody) - n, "%s%s", i ? "," : "", notes[idx]);