Add saved Companion sound and vibration controls

Default fresh settings to sound off and vibration on, and keep existing saved choices. Apply changes immediately across all three UIs and make custom notification patterns respect the same mute controls.

Keep the Wio Mini Companion within its existing flash boundary by storing its LED switch in a reserved preference byte and shortening CLI help without removing commands. Add coverage for live output changes, persistence, and storage failures.

Adapted from https://github.com/meshcore-dev/MeshCore/pull/3603.

Co-authored-by: R0ck <develop@hectospark.co.uk>

src/helpers/ui/buzzer.cpp

@@ -48,16 +48,14 @@ static mesh::audio::VoiceClip buttonVoiceClip(ButtonVoicePrompt prompt) {
 #endif
 
 void genericBuzzer::begin() {
-//    Serial.print("DBG: Setting up buzzer on pin ");
-//    Serial.println(PIN_BUZZER);
-    #ifdef PIN_BUZZER_EN
-      pinMode(PIN_BUZZER_EN, OUTPUT);
-      digitalWrite(PIN_BUZZER_EN, HIGH);
-    #endif
-
-    quiet(false);
+    digitalWrite(PIN_BUZZER, LOW);
     pinMode(PIN_BUZZER, OUTPUT);
-    digitalWrite(PIN_BUZZER, LOW); // need to pull low by default to avoid extreme power draw
+#ifdef PIN_BUZZER_EN
+    digitalWrite(PIN_BUZZER_EN, LOW);
+    pinMode(PIN_BUZZER_EN, OUTPUT);
+#endif
+    // Start muted until the UI applies the saved preference.
+    quiet(_is_quiet);
 }
 
 void genericBuzzer::play(const char *melody) {
@@ -79,6 +77,8 @@ void genericBuzzer::play(const char *melody) {
 }
 
 void genericBuzzer::playNotification(const char* melody) {
+    // Muted background alerts must not interrupt an explicit button prompt.
+    if (_is_quiet) return;
     stop();
 #ifdef PIN_BUZZER_EN
     digitalWrite(PIN_BUZZER_EN, HIGH);