Add skip notification and delay before action

src/activities/reader/EpubReaderActivity.cpp

@@ -186,11 +186,13 @@ void EpubReaderActivity::loop() {
   if (skipChapter) {
     // We don't want to delete the section mid-render, so grab the semaphore
     xSemaphoreTake(renderingMutex, portMAX_DELAY);
-    nextPageNumber = 0;
-    currentSpineIndex = nextReleased ? currentSpineIndex + 1 : currentSpineIndex - 1;
-    section.reset();
+    // Show immediate feedback for long-press skip, then schedule delayed action (500ms)
+    showSkipPopup("Skipping");
+    delayedSkipPending = true;
+    delayedSkipDir = nextReleased ? +1 : -1;
+    delayedSkipExecuteAtMs = millis() + 500;
     xSemaphoreGive(renderingMutex);
-    updateRequired = true;
+    // Do not perform the skip immediately; it will be executed in display loop after delay
     return;
   }
 
@@ -229,11 +231,21 @@ void EpubReaderActivity::loop() {
 
 void EpubReaderActivity::displayTaskLoop() {
   while (true) {
+    const uint32_t now = millis();
     if (updateRequired) {
       updateRequired = false;
       xSemaphoreTake(renderingMutex, portMAX_DELAY);
       renderScreen();
       xSemaphoreGive(renderingMutex);
+    } else if (delayedSkipPending && now >= delayedSkipExecuteAtMs) {
+      // Execute the delayed chapter skip now
+      xSemaphoreTake(renderingMutex, portMAX_DELAY);
+      nextPageNumber = 0;
+      currentSpineIndex += delayedSkipDir;
+      section.reset();
+      delayedSkipPending = false;
+      xSemaphoreGive(renderingMutex);
+      updateRequired = true;
     }
     vTaskDelay(10 / portTICK_PERIOD_MS);
   }
@@ -385,6 +397,19 @@ void EpubReaderActivity::renderScreen() {
   }
 }
 
+void EpubReaderActivity::showSkipPopup(const char* text) {
+  constexpr int boxMargin = 20;
+  const int textWidth = renderer.getTextWidth(UI_12_FONT_ID, text);
+  const int boxWidth = textWidth + boxMargin * 2;
+  const int boxHeight = renderer.getLineHeight(UI_12_FONT_ID) + boxMargin * 2;
+  const int boxX = (renderer.getScreenWidth() - boxWidth) / 2;
+  constexpr int boxY = 50;
+  renderer.fillRect(boxX, boxY, boxWidth, boxHeight, false);
+  renderer.drawText(UI_12_FONT_ID, boxX + boxMargin, boxY + boxMargin, text);
+  renderer.drawRect(boxX + 5, boxY + 5, boxWidth - 10, boxHeight - 10);
+  renderer.displayBuffer(EInkDisplay::FAST_REFRESH);
+}
+
 void EpubReaderActivity::renderContents(std::unique_ptr<Page> page, const int orientedMarginTop,
                                         const int orientedMarginRight, const int orientedMarginBottom,
                                         const int orientedMarginLeft) {

src/activities/reader/EpubReaderActivity.h

@@ -16,6 +16,9 @@ class EpubReaderActivity final : public ActivityWithSubactivity {
   int nextPageNumber = 0;
   int pagesUntilFullRefresh = 0;
   bool updateRequired = false;
+  bool delayedSkipPending = false;
+  int delayedSkipDir = 0;
+  uint32_t delayedSkipExecuteAtMs = 0;
   const std::function<void()> onGoBack;
   const std::function<void()> onGoHome;
 
@@ -25,6 +28,7 @@ class EpubReaderActivity final : public ActivityWithSubactivity {
   void renderContents(std::unique_ptr<Page> page, int orientedMarginTop, int orientedMarginRight,
                       int orientedMarginBottom, int orientedMarginLeft);
   void renderStatusBar(int orientedMarginRight, int orientedMarginBottom, int orientedMarginLeft) const;
+  void showSkipPopup(const char* text);
 
  public:
   explicit EpubReaderActivity(GfxRenderer& renderer, MappedInputManager& mappedInput, std::unique_ptr<Epub> epub,

src/activities/reader/XtcReaderActivity.cpp

@@ -132,6 +132,16 @@ void XtcReaderActivity::loop() {
   const int skipAmount = skipPages ? 10 : 1;
 
   if (prevReleased) {
+    if (skipPages) {
+      xSemaphoreTake(renderingMutex, portMAX_DELAY);
+      showSkipPopup("Skipping");
+      delayedSkipPending = true;
+      delayedSkipDir = -1;
+      delayedSkipAmount = skipAmount;
+      delayedSkipExecuteAtMs = millis() + 500;
+      xSemaphoreGive(renderingMutex);
+      return;
+    }
     if (currentPage >= static_cast<uint32_t>(skipAmount)) {
       currentPage -= skipAmount;
     } else {
@@ -139,6 +149,16 @@ void XtcReaderActivity::loop() {
     }
     updateRequired = true;
   } else if (nextReleased) {
+    if (skipPages) {
+      xSemaphoreTake(renderingMutex, portMAX_DELAY);
+      showSkipPopup("Skipping");
+      delayedSkipPending = true;
+      delayedSkipDir = +1;
+      delayedSkipAmount = skipAmount;
+      delayedSkipExecuteAtMs = millis() + 500;
+      xSemaphoreGive(renderingMutex);
+      return;
+    }
     currentPage += skipAmount;
     if (currentPage >= xtc->getPageCount()) {
       currentPage = xtc->getPageCount();  // Allow showing "End of book"
@@ -149,11 +169,29 @@ void XtcReaderActivity::loop() {
 
 void XtcReaderActivity::displayTaskLoop() {
   while (true) {
+    const uint32_t now = millis();
     if (updateRequired) {
       updateRequired = false;
       xSemaphoreTake(renderingMutex, portMAX_DELAY);
       renderScreen();
       xSemaphoreGive(renderingMutex);
+    } else if (delayedSkipPending && now >= delayedSkipExecuteAtMs) {
+      xSemaphoreTake(renderingMutex, portMAX_DELAY);
+      if (delayedSkipDir < 0) {
+        if (currentPage >= delayedSkipAmount) {
+          currentPage -= delayedSkipAmount;
+        } else {
+          currentPage = 0;
+        }
+      } else {
+        currentPage += delayedSkipAmount;
+        if (currentPage >= xtc->getPageCount()) {
+          currentPage = xtc->getPageCount();
+        }
+      }
+      delayedSkipPending = false;
+      xSemaphoreGive(renderingMutex);
+      updateRequired = true;
     }
     vTaskDelay(10 / portTICK_PERIOD_MS);
   }
@@ -177,6 +215,19 @@ void XtcReaderActivity::renderScreen() {
   saveProgress();
 }
 
+void XtcReaderActivity::showSkipPopup(const char* text) {
+  constexpr int boxMargin = 20;
+  const int textWidth = renderer.getTextWidth(UI_12_FONT_ID, text);
+  const int boxWidth = textWidth + boxMargin * 2;
+  const int boxHeight = renderer.getLineHeight(UI_12_FONT_ID) + boxMargin * 2;
+  const int boxX = (renderer.getScreenWidth() - boxWidth) / 2;
+  constexpr int boxY = 50;
+  renderer.fillRect(boxX, boxY, boxWidth, boxHeight, false);
+  renderer.drawText(UI_12_FONT_ID, boxX + boxMargin, boxY + boxMargin, text);
+  renderer.drawRect(boxX + 5, boxY + 5, boxWidth - 10, boxHeight - 10);
+  renderer.displayBuffer(EInkDisplay::FAST_REFRESH);
+}
+
 void XtcReaderActivity::renderPage() {
   const uint16_t pageWidth = xtc->getPageWidth();
   const uint16_t pageHeight = xtc->getPageHeight();
@@ -359,6 +410,8 @@ void XtcReaderActivity::renderPage() {
                 bitDepth);
 }
 
+// scheduleSkipMessage removed: delayed skip now handled via delayedSkip* fields
+
 void XtcReaderActivity::saveProgress() const {
   FsFile f;
   if (SdMan.openFileForWrite("XTR", xtc->getCachePath() + "/progress.bin", f)) {

src/activities/reader/XtcReaderActivity.h

@@ -21,6 +21,10 @@ class XtcReaderActivity final : public ActivityWithSubactivity {
   uint32_t currentPage = 0;
   int pagesUntilFullRefresh = 0;
   bool updateRequired = false;
+  bool delayedSkipPending = false;
+  int delayedSkipDir = 0;
+  uint32_t delayedSkipExecuteAtMs = 0;
+  uint32_t delayedSkipAmount = 0; 
   const std::function<void()> onGoBack;
   const std::function<void()> onGoHome;
 
@@ -30,6 +34,7 @@ class XtcReaderActivity final : public ActivityWithSubactivity {
   void renderPage();
   void saveProgress() const;
   void loadProgress();
+  void showSkipPopup(const char* text);
 
  public:
   explicit XtcReaderActivity(GfxRenderer& renderer, MappedInputManager& mappedInput, std::unique_ptr<Xtc> xtc,