feat(ui-core,ui-lvgl): sound in the Core, L2 speaker via ES8311, Sound settings, melody editor

- genericBuzzer I2S path (BUZZER_I2S): an audio task synthesises the notes
  with eased edges and keeps the DMA queue fed with silence between sounds;
  ES8311 setup; amp powered through the board only around sounds
- ui-core/SoundControl.h (mode, volume, built-in sounds, melody model),
  SoundNotifier moved to the Core, chanctl::melody, schema Sound page
- L2: notifications, alarm / timer ring, locator sounds, Settings > Sound,
  melody editor with the playing note lit, per-chat sound, mute icon
- noteIndex() on every buzzer backend; scrolling popups past screen height

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

examples/companion_radio/ui-lvgl/NavMap.h

@@ -446,8 +446,9 @@ lv_obj_t* UITask::navPopupPanel(const char* title, bool full) {
   if (full) {
     lv_obj_set_size(panel, w, lv_display_get_vertical_resolution(NULL) - theme::STATUS_H - 12);
     lv_obj_set_pos(panel, 8, theme::STATUS_H + 6);
-  } else {
+  } else {   // as tall as its content, scrolling past the screen's height
     lv_obj_set_size(panel, w, LV_SIZE_CONTENT);
+    lv_obj_set_style_max_height(panel, lv_display_get_vertical_resolution(NULL) - theme::STATUS_H - 12, 0);
     lv_obj_align(panel, LV_ALIGN_CENTER, 0, theme::STATUS_H / 2);
   }
   lv_obj_set_style_bg_color(panel, lv_color_hex(theme::BG), 0);
@@ -457,7 +458,7 @@ lv_obj_t* UITask::navPopupPanel(const char* title, bool full) {
   lv_obj_set_style_pad_all(panel, theme::PAD, 0);
   lv_obj_set_style_pad_row(panel, 6, 0);
   lv_obj_set_flex_flow(panel, LV_FLEX_FLOW_COLUMN);
-  lv_obj_remove_flag(panel, LV_OBJ_FLAG_SCROLLABLE);
+  if (full) lv_obj_remove_flag(panel, LV_OBJ_FLAG_SCROLLABLE);   // its own list scrolls
 
   lv_obj_t* hdr = lv_obj_create(panel);
   styleSurface(hdr, theme::BG);