X3 fixes

src/activities/settings/SettingInfo.h

@@ -264,7 +264,9 @@ inline void SettingInfo::prepareSubmenus(std::vector<SettingInfo>& items,
     auto it = std::find_if(preparedSubmenus.begin(), preparedSubmenus.end(),
                            [&item](const SubmenuData& d) { return d.id == item.submenu; });
     if (it == preparedSubmenus.end()) {
-      preparedItems.push_back(SettingInfo::SubmenuEntry(item.submenu));
+      auto placeholder = SettingInfo::SubmenuEntry(item.submenu);
+      placeholder.subcategory = item.subcategory;  // inherit so addTo inserts the separator
+      preparedItems.push_back(std::move(placeholder));
       preparedSubmenus.push_back({item.submenu, {}});
       it = preparedSubmenus.end() - 1;
     }

src/activities/settings/SettingsActivity.cpp

@@ -23,6 +23,7 @@ bool SettingsActivity::isListItemSelectable(int settingIdx) const {
 
 void SettingsActivity::onEnter() {
   Activity::onEnter();
+  needsHalfRefresh = true;
 
   // Build per-category vectors from the shared settings list.
   // addTo tracks the last subcategory per vector and automatically inserts a separator
@@ -80,6 +81,8 @@ void SettingsActivity::onEnter() {
   // Device-only ACTION items — subcategory drives separator insertion automatically.
   controlsSettings.insert(controlsSettings.begin(),
                           SettingInfo::Action(StrId::STR_REMAP_FRONT_BUTTONS, SettingAction::RemapFrontButtons));
+  controlsSettings.insert(controlsSettings.begin(), SettingInfo::Separator(StrId::STR_MENU_BTN_PHYSICAL));
+  lastControlsSub = StrId::STR_MENU_BTN_PHYSICAL;
 
   addToMoved(readerSettings, lastReaderSub,
              SettingInfo::Action(StrId::STR_CUSTOMISE_STATUS_BAR, SettingAction::CustomiseStatusBar));
@@ -217,11 +220,15 @@ void SettingsActivity::toggleCurrentSetting() {
   if (setting.type == SettingType::ACTION) {
     auto resultHandler = [this](const ActivityResult& result) {
       SETTINGS.saveToFile();
+      needsHalfRefresh = true;
       const auto* menuResult = std::get_if<MenuResult>(&result.data);
       if (menuResult && menuResult->action != -1) {
         auto activity = createActivityForAction(static_cast<SettingAction>(menuResult->action), renderer, mappedInput);
         if (activity) {
-          startActivityForResult(std::move(activity), [this](const ActivityResult&) { SETTINGS.saveToFile(); });
+          startActivityForResult(std::move(activity), [this](const ActivityResult&) {
+            SETTINGS.saveToFile();
+            needsHalfRefresh = true;
+          });
         }
       }
     };
@@ -279,5 +286,7 @@ void SettingsActivity::render(RenderLock&&) {
   const auto labels = mappedInput.mapLabels(tr(STR_BACK), confirmLabel, tr(STR_DIR_UP), tr(STR_DIR_DOWN));
   GUI.drawButtonHints(renderer, labels.btn1, labels.btn2, labels.btn3, labels.btn4);
 
-  renderer.displayBuffer(gpio.deviceIsX3() ? HalDisplay::HALF_REFRESH : HalDisplay::FAST_REFRESH);
+  const bool halfRefresh = gpio.deviceIsX3() && needsHalfRefresh;
+  needsHalfRefresh = false;
+  renderer.displayBuffer(halfRefresh ? HalDisplay::HALF_REFRESH : HalDisplay::FAST_REFRESH);
 }

src/activities/settings/SettingsActivity.h

@@ -25,6 +25,7 @@ class SettingsActivity final : public Activity {
   static const StrId categoryNames[categoryCount];
 
   std::vector<SettingInfo::SubmenuData> submenuData;
+  bool needsHalfRefresh = false;
 
   void enterCategory(int categoryIndex);
   void toggleCurrentSetting();

src/activities/settings/SettingsSubmenuActivity.cpp

@@ -13,6 +13,7 @@
 
 void SettingsSubmenuActivity::onEnter() {
   Activity::onEnter();
+  needsHalfRefresh = true;
   initMenuList();
   requestUpdate();
 }
@@ -65,5 +66,7 @@ void SettingsSubmenuActivity::render(RenderLock&&) {
   const auto labels = mappedInput.mapLabels(tr(STR_BACK), tr(STR_SELECT), tr(STR_DIR_UP), tr(STR_DIR_DOWN));
   GUI.drawButtonHints(renderer, labels.btn1, labels.btn2, labels.btn3, labels.btn4);
 
-  renderer.displayBuffer(gpio.deviceIsX3() ? HalDisplay::HALF_REFRESH : HalDisplay::FAST_REFRESH);
+  const bool halfRefresh = gpio.deviceIsX3() && needsHalfRefresh;
+  needsHalfRefresh = false;
+  renderer.displayBuffer(halfRefresh ? HalDisplay::HALF_REFRESH : HalDisplay::FAST_REFRESH);
 }

src/activities/settings/SettingsSubmenuActivity.h

@@ -12,6 +12,7 @@
 class SettingsSubmenuActivity final : public MenuListActivity {
   StrId titleId;
   std::function<std::string(const SettingInfo&)> itemValueStringOverride;
+  bool needsHalfRefresh = false;
 
   // MenuListActivity overrides
   void onEnter() override;