Ensure activitytracker updates get flushed to disk

src/ReadingSessionTracker.cpp

@@ -77,7 +77,7 @@ void ReadingSessionTracker::end() {
   LOG_DBG("RST", "Session end doc=%s secs=%u pages=%u prog=%u wall=%lld", docId.c_str(), seconds,
           pagesTurnedThisSession, lastKnownProgress, (long long)walltime);
 
-  if (seconds > 0 && !docId.empty()) {
+  if (!docId.empty()) {
     READING_STATS.recordSession(docId, title, author, seconds, pagesTurnedThisSession, lastKnownProgress,
                                 static_cast<time_t>(walltime));
     if (!READING_STATS.saveToFile()) {

src/ReadingStats.cpp

@@ -64,8 +64,8 @@ ReadingStatsStore ReadingStatsStore::instance;
 void ReadingStatsStore::recordSession(const std::string& docId, const std::string& title, const std::string& author,
                                       uint32_t sessionSeconds, uint32_t sessionPagesTurned, uint8_t progress,
                                       time_t walltimeEpoch) {
-  if (docId.empty() || sessionSeconds == 0) {
-    // Nothing to credit. Title-update-only flows go through a different path.
+  if (docId.empty()) {
+    // Title-update-only flows go through a different path.
     return;
   }
 

src/main.cpp

@@ -28,6 +28,7 @@
 #include "KOReaderCredentialStore.h"
 #include "MappedInputManager.h"
 #include "OpdsServerStore.h"
+#include "ReadingSessionTracker.h"
 #include "ReadingStats.h"
 #include "RecentBooksStore.h"
 #include "SdCardFontSystem.h"
@@ -154,6 +155,9 @@ static bool deepSleepInProgress = false;
 
 void silentRestart() {
   if (deepSleepInProgress) return;  // sleeping supersedes the heap-defrag reboot
+  // ESP.restart() bypasses activity onExit(), so flush any in-flight reading
+  // session manually — otherwise a heap-defrag reboot mid-read loses the session.
+  globalReadingSessionTracker().end();
   silentRebootTarget = SILENT_REBOOT_TARGET_HOME;
   silentRebootMagic = SILENT_REBOOT_MAGIC;
   LOG_DBG("MAIN", "Silent restart (target=home)");
@@ -163,6 +167,7 @@ void silentRestart() {
 
 void silentRestartToReader() {
   if (deepSleepInProgress) return;  // sleeping supersedes the heap-defrag reboot
+  globalReadingSessionTracker().end();
   silentRebootTarget = SILENT_REBOOT_TARGET_READER;
   silentRebootMagic = SILENT_REBOOT_MAGIC;
   LOG_DBG("MAIN", "Silent restart (target=reader)");