fix ghosting regression when opening subactivity from within reader

src/activities/reader/EpubReaderActivity.cpp

@@ -218,6 +218,7 @@ void EpubReaderActivity::loop() {
     const int bookProgressPercent = clampPercent(static_cast<int>(bookProgress + 0.5f));
     const bool isCurrentPageStarred = section && bookmarkStore.has(static_cast<uint16_t>(currentSpineIndex),
                                                                    static_cast<uint16_t>(section->currentPage));
+    ReaderUtils::enforceExitFullRefresh(renderer);
     startActivityForResult(
         std::make_unique<EpubReaderMenuActivity>(
             renderer, mappedInput, epub->getTitle(), currentPage, totalPages, bookProgressPercent, SETTINGS.orientation,
@@ -263,6 +264,7 @@ void EpubReaderActivity::loop() {
     if (currentPageFootnotes.size() == 1) {
       navigateToHref(currentPageFootnotes[0].href, true);
     } else if (currentPageFootnotes.size() > 1) {
+      ReaderUtils::enforceExitFullRefresh(renderer);
       startActivityForResult(std::make_unique<EpubReaderFootnotesActivity>(renderer, mappedInput, currentPageFootnotes),
                              [this](const ActivityResult& result) {
                                if (!result.isCancelled) {

src/activities/reader/EpubReaderMenuActivity.cpp

@@ -1,7 +1,6 @@
 #include "EpubReaderMenuActivity.h"
 
 #include <GfxRenderer.h>
-#include <HalGPIO.h>
 #include <I18n.h>
 
 #include "KOReaderCredentialStore.h"
@@ -234,10 +233,5 @@ void EpubReaderMenuActivity::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);
 
-  if (gpio.deviceIsX3() && !initialHalfRefreshDone) {
-    initialHalfRefreshDone = true;
-    renderer.displayBuffer(HalDisplay::HALF_REFRESH);
-  } else {
-    renderer.displayBuffer();
-  }
+  renderer.displayBuffer();
 }

src/activities/reader/EpubReaderMenuActivity.h

@@ -62,7 +62,6 @@ class EpubReaderMenuActivity final : public MenuListActivity {
   int8_t pendingEmbeddedStyleOverride = -1;
   int8_t pendingImageRenderingOverride = -1;
   uint8_t pendingTextDarkness = 1;
-  bool initialHalfRefreshDone = false;
 
   static constexpr const char* pageTurnLabels[] = {"", "1", "3", "6", "12"};
 

src/activities/reader/TxtReaderActivity.cpp

@@ -162,6 +162,7 @@ void TxtReaderActivity::loop() {
 
   // Open starred pages list via Confirm button
   if (mappedInput.wasReleased(MappedInputManager::Button::Confirm) && !bookmarkStore.isEmpty()) {
+    ReaderUtils::enforceExitFullRefresh(renderer);
     startActivityForResult(std::make_unique<StarredPagesActivity>(renderer, mappedInput, bookmarkStore),
                            [this](const ActivityResult& result) {
                              if (!result.isCancelled) {

src/activities/reader/XtcReaderActivity.cpp

@@ -69,6 +69,7 @@ void XtcReaderActivity::loop() {
   // Enter chapter selection activity
   if (mappedInput.wasReleased(MappedInputManager::Button::Confirm)) {
     if (xtc && xtc->hasChapters() && !xtc->getChapters().empty()) {
+      ReaderUtils::enforceExitFullRefresh(renderer);
       startActivityForResult(
           std::make_unique<XtcReaderChapterSelectionActivity>(renderer, mappedInput, xtc, currentPage),
           [this](const ActivityResult& result) {