First attempt

Co-authored-by: Copilot <copilot@github.com>

src/activities/reader/EpubReaderActivity.cpp

@@ -294,6 +294,7 @@ void EpubReaderActivity::loop() {
   // Long press BACK (1s+) goes to home screen
   if (mappedInput.isPressed(MappedInputManager::Button::Back) && mappedInput.getHeldTime() >= ReaderUtils::GO_HOME_MS) {
     ReaderUtils::enforceExitFullRefresh(renderer);
+    if (tryAutoPushOnClose()) return;
     onGoHome();
     return;
   }
@@ -306,6 +307,7 @@ void EpubReaderActivity::loop() {
       return;
     }
     ReaderUtils::enforceExitFullRefresh(renderer);
+    if (tryAutoPushOnClose()) return;
     finish();
     return;
   }
@@ -318,6 +320,7 @@ void EpubReaderActivity::loop() {
   // At end of the book, forward button returns to caller and back button returns to last page
   if (currentSpineIndex > 0 && currentSpineIndex >= epub->getSpineItemsCount()) {
     if (nextTriggered) {
+      if (tryAutoPushOnClose()) return;
       finish();
     } else {
       currentSpineIndex = epub->getSpineItemsCount() - 1;
@@ -568,6 +571,7 @@ void EpubReaderActivity::onReaderMenuConfirm(EpubReaderMenuActivity::MenuAction
       break;
     }
     case EpubReaderMenuActivity::MenuAction::GO_HOME: {
+      if (tryAutoPushOnClose()) return;
       onGoHome();
       return;
     }
@@ -831,6 +835,8 @@ void EpubReaderActivity::launchKOReaderSync(const SyncLaunchMode mode) {
     syncIntent = KOReaderSyncIntentState::PULL_REMOTE;
   } else if (mode == SyncLaunchMode::PUSH_LOCAL) {
     syncIntent = KOReaderSyncIntentState::PUSH_LOCAL;
+  } else if (mode == SyncLaunchMode::AUTO_PUSH) {
+    syncIntent = KOReaderSyncIntentState::AUTO_PUSH;
   }
 
   auto& sync = APP_STATE.koReaderSyncSession;
@@ -865,6 +871,10 @@ void EpubReaderActivity::launchKOReaderSync(const SyncLaunchMode mode) {
   sync.resultPage = 0;
   sync.resultParagraphIndex = 0;
   sync.resultHasParagraphIndex = false;
+  // Only auto-push-on-close should bypass the reader on resume; explicit syncs from the
+  // reader menu always come back to the reader. Reset here so a stale flag from a prior
+  // run cannot steal the user back to home.
+  sync.exitToHomeAfterSync = (mode == SyncLaunchMode::AUTO_PUSH);
   APP_STATE.saveToFile();
 
   LOG_DBG("ERS", "Standalone sync handoff: spine=%d page=%d/%d", currentSpineIndex, currentPage, totalPages);
@@ -872,6 +882,27 @@ void EpubReaderActivity::launchKOReaderSync(const SyncLaunchMode mode) {
   activityManager.goToKOReaderSync();
 }
 
+bool EpubReaderActivity::tryAutoPushOnClose() {
+  // Three-page minimum filters out brief inspections — opening to check the cover or
+  // skim the TOC shouldn't burn a network round-trip. Counter is per-activity-instance.
+  constexpr int MIN_SESSION_PAGES = 3;
+  if (!SETTINGS.koSyncOnBookClose) {
+    return false;
+  }
+  if (!KOREADER_STORE.hasCredentials()) {
+    return false;
+  }
+  if (sessionPagesAdvanced < MIN_SESSION_PAGES) {
+    return false;
+  }
+  if (!epub) {
+    return false;
+  }
+  // exitToHomeAfterSync flag is set inside launchKOReaderSync for AUTO_PUSH mode.
+  launchKOReaderSync(SyncLaunchMode::AUTO_PUSH);
+  return true;
+}
+
 void EpubReaderActivity::applyPendingSyncSession() {
   auto& sync = APP_STATE.koReaderSyncSession;
   if (!sync.active || !epub || sync.epubPath != epub->getPath()) {
@@ -891,6 +922,17 @@ void EpubReaderActivity::applyPendingSyncSession() {
     return;
   }
 
+  // AUTO_PULL handed off zeroed local state (the reader was not yet running when sync started),
+  // so on cancel/fail we must NOT restore those zeros to progress.bin — they would clobber the
+  // user's real local progress. Just clear the session and let the normal startup load progress.bin.
+  if (sync.intent == KOReaderSyncIntentState::AUTO_PULL && sync.outcome != KOReaderSyncOutcomeState::APPLIED_REMOTE) {
+    LOG_DBG("ERS", "AUTO_PULL non-success outcome=%d: leaving progress.bin untouched", static_cast<int>(sync.outcome));
+    sync.clear();
+    APP_STATE.saveToFile();
+    logReaderMemSnapshot("after_apply_pending_sync_session");
+    return;
+  }
+
   int restoreSpineIndex = sync.spineIndex;
   int restorePage = sync.page;
   pendingParagraphLookup = sync.hasParagraphIndex;
@@ -1142,6 +1184,9 @@ void EpubReaderActivity::pageTurn(bool isForwardTurn) {
   if (!stepPageState(isForwardTurn)) {
     return;
   }
+  // Track real progress within this session so auto-push-on-close can ignore brief
+  // book inspections. Counts both directions — the user is engaging with the book either way.
+  sessionPagesAdvanced++;
   requestUpdate();
 }
 
@@ -1888,6 +1933,7 @@ void EpubReaderActivity::onButtonAction(const CrossPointSettings::BUTTON_ACTION
     }
     case BA::BTN_EXIT_READER:
       ReaderUtils::enforceExitFullRefresh(renderer);
+      if (tryAutoPushOnClose()) break;
       finish();
       break;
     case BA::BTN_READER_MENU: