USER_GUIDE.md

@@ -59,32 +59,11 @@ See the [webserver docs](./docs/webserver.md) for more information on how to con
 ### 3.5 Settings
 
 The Settings screen allows you to configure the device's behavior. There are a few settings you can adjust:
-- **Sleep Screen**: Which sleep screen to display when the device sleeps, options are:
-  - "Dark" (default) - The default dark sleep screen
-  - "Light" - The same default sleep screen, on a white background
-  - "Custom" - Custom images from the SD card, see [3.6 Sleep Screen](#36-sleep-screen) below for more information
-  - "Cover" - The book cover image (Note: this is experimental and may not work as expected)
+- **White Sleep Screen**: Whether to use the white screen or black (inverted) default sleep screen
 - **Extra Paragraph Spacing**: If enabled, vertical space will be added between paragraphs in the book, if disabled,
   paragraphs will not have vertical space between them, but will have first word indentation.
 - **Short Power Button Click**: Whether to trigger the power button on a short press or a long press.
 
-### 3.6 Sleep Screen
-
-You can customize the sleep screen by placing custom images in specific locations on the SD card:
-
-- **Single Image:** Place a file named `sleep.bmp` in the root directory.
-- **Multiple Images:** Create a `sleep` directory in the root of the SD card and place any number of `.bmp` images
-  inside. If images are found in this directory, they will take priority over the `sleep.png` file, and one will be
-  randomly selected each time the device sleeps.
-
-> [!NOTE]
-> You'll need to set the **Sleep Screen** setting to **Custom** in order to use these images.
-
-> [!TIP]
-> For best results:
-> - Use uncompressed BMP files with 24-bit color depth
-> - Use a resolution of 480x800 pixels to match the device's screen resolution.
-
 ---
 
 ## 4. Reading Mode

lib/Epub/Epub.cpp

@@ -1,7 +1,6 @@
 #include "Epub.h"
 
 #include <HardwareSerial.h>
-#include <JpegToBmpConverter.h>
 #include <SD.h>
 #include <ZipFile.h>
 
@@ -94,42 +93,24 @@ bool Epub::parseTocNcxFile() {
 
   Serial.printf("[%lu] [EBP] Parsing toc ncx file: %s\n", millis(), tocNcxItem.c_str());
 
-  const auto tmpNcxPath = getCachePath() + "/toc.ncx";
-  File tempNcxFile = SD.open(tmpNcxPath.c_str(), FILE_WRITE);
-  readItemContentsToStream(tocNcxItem, tempNcxFile, 1024);
-  tempNcxFile.close();
-  tempNcxFile = SD.open(tmpNcxPath.c_str(), FILE_READ);
-  const auto ncxSize = tempNcxFile.size();
+  size_t tocSize;
+  if (!getItemSize(tocNcxItem, &tocSize)) {
+    Serial.printf("[%lu] [EBP] Could not get size of toc ncx\n", millis());
+    return false;
+  }
 
-  TocNcxParser ncxParser(contentBasePath, ncxSize);
+  TocNcxParser ncxParser(contentBasePath, tocSize);
 
   if (!ncxParser.setup()) {
     Serial.printf("[%lu] [EBP] Could not setup toc ncx parser\n", millis());
     return false;
   }
 
-  const auto ncxBuffer = static_cast<uint8_t*>(malloc(1024));
-  if (!ncxBuffer) {
-    Serial.printf("[%lu] [EBP] Could not allocate memory for toc ncx parser\n", millis());
+  if (!readItemContentsToStream(tocNcxItem, ncxParser, 1024)) {
+    Serial.printf("[%lu] [EBP] Could not read toc ncx stream\n", millis());
     return false;
   }
 
-  while (tempNcxFile.available()) {
-    const auto readSize = tempNcxFile.read(ncxBuffer, 1024);
-    const auto processedSize = ncxParser.write(ncxBuffer, readSize);
-
-    if (processedSize != readSize) {
-      Serial.printf("[%lu] [EBP] Could not process all toc ncx data\n", millis());
-      free(ncxBuffer);
-      tempNcxFile.close();
-      return false;
-    }
-  }
-
-  free(ncxBuffer);
-  tempNcxFile.close();
-  SD.remove(tmpNcxPath.c_str());
-
   this->toc = std::move(ncxParser.toc);
 
   Serial.printf("[%lu] [EBP] Parsed %d TOC items\n", millis(), this->toc.size());
@@ -219,45 +200,7 @@ const std::string& Epub::getPath() const { return filepath; }
 
 const std::string& Epub::getTitle() const { return title; }
 
-std::string Epub::getCoverBmpPath() const { return cachePath + "/cover.bmp"; }
-
-bool Epub::generateCoverBmp() const {
-  // Already generated, return true
-  if (SD.exists(getCoverBmpPath().c_str())) {
-    return true;
-  }
-
-  if (coverImageItem.empty()) {
-    Serial.printf("[%lu] [EBP] No known cover image\n", millis());
-    return false;
-  }
-
-  if (coverImageItem.substr(coverImageItem.length() - 4) == ".jpg" ||
-      coverImageItem.substr(coverImageItem.length() - 5) == ".jpeg") {
-    Serial.printf("[%lu] [EBP] Generating BMP from JPG cover image\n", millis());
-    File coverJpg = SD.open((getCachePath() + "/.cover.jpg").c_str(), FILE_WRITE, true);
-    readItemContentsToStream(coverImageItem, coverJpg, 1024);
-    coverJpg.close();
-
-    coverJpg = SD.open((getCachePath() + "/.cover.jpg").c_str(), FILE_READ);
-    File coverBmp = SD.open(getCoverBmpPath().c_str(), FILE_WRITE, true);
-    const bool success = JpegToBmpConverter::jpegFileToBmpStream(coverJpg, coverBmp);
-    coverJpg.close();
-    coverBmp.close();
-    SD.remove((getCachePath() + "/.cover.jpg").c_str());
-
-    if (!success) {
-      Serial.printf("[%lu] [EBP] Failed to generate BMP from JPG cover image\n", millis());
-      SD.remove(getCoverBmpPath().c_str());
-    }
-    Serial.printf("[%lu] [EBP] Generated BMP from JPG cover image, success: %s\n", millis(), success ? "yes" : "no");
-    return success;
-  } else {
-    Serial.printf("[%lu] [EBP] Cover image is not a JPG, skipping\n", millis());
-  }
-
-  return false;
-}
+const std::string& Epub::getCoverImageItem() const { return coverImageItem; }
 
 std::string normalisePath(const std::string& path) {
   std::vector<std::string> components;
@@ -350,7 +293,7 @@ std::string& Epub::getSpineItem(const int spineIndex) {
 }
 
 EpubTocEntry& Epub::getTocItem(const int tocTndex) {
-  static EpubTocEntry emptyEntry = {};
+  static EpubTocEntry emptyEntry("", "", "", 0);
   if (toc.empty()) {
     Serial.printf("[%lu] [EBP] getTocItem called but toc is empty\n", millis());
     return emptyEntry;

lib/Epub/Epub.h

@@ -48,8 +48,7 @@ class Epub {
   const std::string& getCachePath() const;
   const std::string& getPath() const;
   const std::string& getTitle() const;
-  std::string getCoverBmpPath() const;
-  bool generateCoverBmp() const;
+  const std::string& getCoverImageItem() const;
   uint8_t* readItemContentsToBytes(const std::string& itemHref, size_t* size = nullptr,
                                    bool trailingNullByte = false) const;
   bool readItemContentsToStream(const std::string& itemHref, Print& out, size_t chunkSize) const;

lib/Epub/Epub/EpubTocEntry.h

@@ -2,9 +2,12 @@
 
 #include <string>
 
-struct EpubTocEntry {
+class EpubTocEntry {
+ public:
   std::string title;
   std::string href;
   std::string anchor;
-  uint8_t level;
+  int level;
+  EpubTocEntry(std::string title, std::string href, std::string anchor, const int level)
+      : title(std::move(title)), href(std::move(href)), anchor(std::move(anchor)), level(level) {}
 };

lib/Epub/Epub/ParsedText.cpp

@@ -144,7 +144,7 @@ void ParsedText::extractLine(const size_t breakIndex, const int pageWidth, const
   const int spareSpace = pageWidth - lineWordWidthSum;
 
   int spacing = spaceWidth;
-  const bool isLastLine = breakIndex == lineBreakIndices.size() - 1;
+  const bool isLastLine = lineBreak == words.size();
 
   if (style == TextBlock::JUSTIFIED && !isLastLine && lineWordCount >= 2) {
     spacing = spareSpace / (lineWordCount - 1);

lib/Epub/Epub/parsers/TocNcxParser.cpp

@@ -155,7 +155,7 @@ void XMLCALL TocNcxParser::endElement(void* userData, const XML_Char* name) {
       }
 
       // Push to vector
-      self->toc.push_back({std::move(self->currentLabel), std::move(href), std::move(anchor), self->currentDepth});
+      self->toc.emplace_back(self->currentLabel, href, anchor, self->currentDepth);
 
       // Clear them so we don't re-add them if there are weird XML structures
       self->currentLabel.clear();

lib/Epub/Epub/parsers/TocNcxParser.h

@@ -17,7 +17,7 @@ class TocNcxParser final : public Print {
 
   std::string currentLabel;
   std::string currentSrc;
-  uint8_t currentDepth = 0;
+  size_t currentDepth = 0;
 
   static void startElement(void* userData, const XML_Char* name, const XML_Char** atts);
   static void characterData(void* userData, const XML_Char* s, int len);

lib/GfxRenderer/Bitmap.cpp

@@ -128,7 +128,7 @@ BmpReaderError Bitmap::readRow(uint8_t* data, uint8_t* rowBuffer) const {
   int bitShift = 6;
 
   // Helper lambda to pack 2bpp color into the output stream
-  auto packPixel = [&](const uint8_t lum) {
+  auto packPixel = [&](uint8_t lum) {
     uint8_t color = (lum >> 6);  // Simple 2-bit reduction: 0-255 -> 0-3
     currentOutByte |= (color << bitShift);
     if (bitShift == 0) {
@@ -140,49 +140,38 @@ BmpReaderError Bitmap::readRow(uint8_t* data, uint8_t* rowBuffer) const {
     }
   };
 
-  uint8_t lum;
-
   switch (bpp) {
-    case 32: {
-      const uint8_t* p = rowBuffer;
-      for (int x = 0; x < width; x++) {
-        lum = (77u * p[2] + 150u * p[1] + 29u * p[0]) >> 8;
-        packPixel(lum);
-        p += 4;
-      }
-      break;
-    }
-    case 24: {
-      const uint8_t* p = rowBuffer;
-      for (int x = 0; x < width; x++) {
-        lum = (77u * p[2] + 150u * p[1] + 29u * p[0]) >> 8;
-        packPixel(lum);
-        p += 3;
-      }
-      break;
-    }
     case 8: {
       for (int x = 0; x < width; x++) {
         packPixel(paletteLum[rowBuffer[x]]);
       }
       break;
     }
-    case 2: {
+    case 24: {
+      const uint8_t* p = rowBuffer;
       for (int x = 0; x < width; x++) {
-        lum = paletteLum[(rowBuffer[x >> 2] >> (6 - ((x & 3) * 2))) & 0x03];
+        uint8_t lum = (77u * p[2] + 150u * p[1] + 29u * p[0]) >> 8;
         packPixel(lum);
+        p += 3;
       }
       break;
     }
     case 1: {
       for (int x = 0; x < width; x++) {
-        lum = (rowBuffer[x >> 3] & (0x80 >> (x & 7))) ? 0xFF : 0x00;
+        uint8_t lum = (rowBuffer[x >> 3] & (0x80 >> (x & 7))) ? 0xFF : 0x00;
         packPixel(lum);
       }
       break;
     }
-    default:
-      return BmpReaderError::UnsupportedBpp;
+    case 32: {
+      const uint8_t* p = rowBuffer;
+      for (int x = 0; x < width; x++) {
+        uint8_t lum = (77u * p[2] + 150u * p[1] + 29u * p[0]) >> 8;
+        packPixel(lum);
+        p += 4;
+      }
+      break;
+    }
   }
 
   // Flush remaining bits if width is not a multiple of 4

lib/JpegToBmpConverter/JpegToBmpConverter.cpp

@@ -1,244 +0,0 @@
-#include "JpegToBmpConverter.h"
-
-#include <picojpeg.h>
-
-#include <cstdio>
-#include <cstring>
-
-// Context structure for picojpeg callback
-struct JpegReadContext {
-  File& file;
-  uint8_t buffer[512];
-  size_t bufferPos;
-  size_t bufferFilled;
-};
-
-// Helper function: Convert 8-bit grayscale to 2-bit (0-3)
-uint8_t JpegToBmpConverter::grayscaleTo2Bit(const uint8_t grayscale) {
-  // Simple threshold mapping:
-  // 0-63 -> 0 (black)
-  // 64-127 -> 1 (dark gray)
-  // 128-191 -> 2 (light gray)
-  // 192-255 -> 3 (white)
-  return grayscale >> 6;
-}
-
-inline void write16(Print& out, const uint16_t value) {
-  // out.write(reinterpret_cast<const uint8_t *>(&value), 2);
-  out.write(value & 0xFF);
-  out.write((value >> 8) & 0xFF);
-}
-
-inline void write32(Print& out, const uint32_t value) {
-  // out.write(reinterpret_cast<const uint8_t *>(&value), 4);
-  out.write(value & 0xFF);
-  out.write((value >> 8) & 0xFF);
-  out.write((value >> 16) & 0xFF);
-  out.write((value >> 24) & 0xFF);
-}
-
-inline void write32Signed(Print& out, const int32_t value) {
-  // out.write(reinterpret_cast<const uint8_t *>(&value), 4);
-  out.write(value & 0xFF);
-  out.write((value >> 8) & 0xFF);
-  out.write((value >> 16) & 0xFF);
-  out.write((value >> 24) & 0xFF);
-}
-
-// Helper function: Write BMP header with 2-bit color depth
-void JpegToBmpConverter::writeBmpHeader(Print& bmpOut, const int width, const int height) {
-  // Calculate row padding (each row must be multiple of 4 bytes)
-  const int bytesPerRow = (width * 2 + 31) / 32 * 4;  // 2 bits per pixel, round up
-  const int imageSize = bytesPerRow * height;
-  const uint32_t fileSize = 70 + imageSize;  // 14 (file header) + 40 (DIB header) + 16 (palette) + image
-
-  // BMP File Header (14 bytes)
-  bmpOut.write('B');
-  bmpOut.write('M');
-  write32(bmpOut, fileSize);  // File size
-  write32(bmpOut, 0);         // Reserved
-  write32(bmpOut, 70);        // Offset to pixel data
-
-  // DIB Header (BITMAPINFOHEADER - 40 bytes)
-  write32(bmpOut, 40);
-  write32Signed(bmpOut, width);
-  write32Signed(bmpOut, -height);  // Negative height = top-down bitmap
-  write16(bmpOut, 1);              // Color planes
-  write16(bmpOut, 2);              // Bits per pixel (2 bits)
-  write32(bmpOut, 0);              // BI_RGB (no compression)
-  write32(bmpOut, imageSize);
-  write32(bmpOut, 2835);  // xPixelsPerMeter (72 DPI)
-  write32(bmpOut, 2835);  // yPixelsPerMeter (72 DPI)
-  write32(bmpOut, 4);     // colorsUsed
-  write32(bmpOut, 4);     // colorsImportant
-
-  // Color Palette (4 colors x 4 bytes = 16 bytes)
-  // Format: Blue, Green, Red, Reserved (BGRA)
-  uint8_t palette[16] = {
-      0x00, 0x00, 0x00, 0x00,  // Color 0: Black
-      0x55, 0x55, 0x55, 0x00,  // Color 1: Dark gray (85)
-      0xAA, 0xAA, 0xAA, 0x00,  // Color 2: Light gray (170)
-      0xFF, 0xFF, 0xFF, 0x00   // Color 3: White
-  };
-  for (const uint8_t i : palette) {
-    bmpOut.write(i);
-  }
-}
-
-// Callback function for picojpeg to read JPEG data
-unsigned char JpegToBmpConverter::jpegReadCallback(unsigned char* pBuf, const unsigned char buf_size,
-                                                   unsigned char* pBytes_actually_read, void* pCallback_data) {
-  auto* context = static_cast<JpegReadContext*>(pCallback_data);
-
-  if (!context || !context->file) {
-    return PJPG_STREAM_READ_ERROR;
-  }
-
-  // Check if we need to refill our context buffer
-  if (context->bufferPos >= context->bufferFilled) {
-    context->bufferFilled = context->file.read(context->buffer, sizeof(context->buffer));
-    context->bufferPos = 0;
-
-    if (context->bufferFilled == 0) {
-      // EOF or error
-      *pBytes_actually_read = 0;
-      return 0;  // Success (EOF is normal)
-    }
-  }
-
-  // Copy available bytes to picojpeg's buffer
-  const size_t available = context->bufferFilled - context->bufferPos;
-  const size_t toRead = available < buf_size ? available : buf_size;
-
-  memcpy(pBuf, context->buffer + context->bufferPos, toRead);
-  context->bufferPos += toRead;
-  *pBytes_actually_read = static_cast<unsigned char>(toRead);
-
-  return 0;  // Success
-}
-
-// Core function: Convert JPEG file to 2-bit BMP
-bool JpegToBmpConverter::jpegFileToBmpStream(File& jpegFile, Print& bmpOut) {
-  Serial.printf("[%lu] [JPG] Converting JPEG to BMP\n", millis());
-
-  // Setup context for picojpeg callback
-  JpegReadContext context = {.file = jpegFile, .bufferPos = 0, .bufferFilled = 0};
-
-  // Initialize picojpeg decoder
-  pjpeg_image_info_t imageInfo;
-  const unsigned char status = pjpeg_decode_init(&imageInfo, jpegReadCallback, &context, 0);
-  if (status != 0) {
-    Serial.printf("[%lu] [JPG] JPEG decode init failed with error code: %d\n", millis(), status);
-    return false;
-  }
-
-  Serial.printf("[%lu] [JPG] JPEG dimensions: %dx%d, components: %d, MCUs: %dx%d\n", millis(), imageInfo.m_width,
-                imageInfo.m_height, imageInfo.m_comps, imageInfo.m_MCUSPerRow, imageInfo.m_MCUSPerCol);
-
-  // Write BMP header
-  writeBmpHeader(bmpOut, imageInfo.m_width, imageInfo.m_height);
-
-  // Calculate row parameters
-  const int bytesPerRow = (imageInfo.m_width * 2 + 31) / 32 * 4;
-
-  // Allocate row buffer for packed 2-bit pixels
-  auto* rowBuffer = static_cast<uint8_t*>(malloc(bytesPerRow));
-  if (!rowBuffer) {
-    Serial.printf("[%lu] [JPG] Failed to allocate row buffer\n", millis());
-    return false;
-  }
-
-  // Allocate a buffer for one MCU row worth of grayscale pixels
-  // This is the minimal memory needed for streaming conversion
-  const int mcuPixelHeight = imageInfo.m_MCUHeight;
-  const int mcuRowPixels = imageInfo.m_width * mcuPixelHeight;
-  auto* mcuRowBuffer = static_cast<uint8_t*>(malloc(mcuRowPixels));
-  if (!mcuRowBuffer) {
-    Serial.printf("[%lu] [JPG] Failed to allocate MCU row buffer\n", millis());
-    free(rowBuffer);
-    return false;
-  }
-
-  // Process MCUs row-by-row and write to BMP as we go (top-down)
-  const int mcuPixelWidth = imageInfo.m_MCUWidth;
-
-  for (int mcuY = 0; mcuY < imageInfo.m_MCUSPerCol; mcuY++) {
-    // Clear the MCU row buffer
-    memset(mcuRowBuffer, 0, mcuRowPixels);
-
-    // Decode one row of MCUs
-    for (int mcuX = 0; mcuX < imageInfo.m_MCUSPerRow; mcuX++) {
-      const unsigned char mcuStatus = pjpeg_decode_mcu();
-      if (mcuStatus != 0) {
-        if (mcuStatus == PJPG_NO_MORE_BLOCKS) {
-          Serial.printf("[%lu] [JPG] Unexpected end of blocks at MCU (%d, %d)\n", millis(), mcuX, mcuY);
-        } else {
-          Serial.printf("[%lu] [JPG] JPEG decode MCU failed at (%d, %d) with error code: %d\n", millis(), mcuX, mcuY,
-                        mcuStatus);
-        }
-        free(mcuRowBuffer);
-        free(rowBuffer);
-        return false;
-      }
-
-      // Process MCU block into MCU row buffer
-      for (int blockY = 0; blockY < mcuPixelHeight; blockY++) {
-        for (int blockX = 0; blockX < mcuPixelWidth; blockX++) {
-          const int pixelX = mcuX * mcuPixelWidth + blockX;
-
-          // Skip pixels outside image width (can happen with MCU alignment)
-          if (pixelX >= imageInfo.m_width) {
-            continue;
-          }
-
-          // Get grayscale value
-          uint8_t gray;
-          if (imageInfo.m_comps == 1) {
-            // Grayscale image
-            gray = imageInfo.m_pMCUBufR[blockY * mcuPixelWidth + blockX];
-          } else {
-            // RGB image - convert to grayscale
-            const uint8_t r = imageInfo.m_pMCUBufR[blockY * mcuPixelWidth + blockX];
-            const uint8_t g = imageInfo.m_pMCUBufG[blockY * mcuPixelWidth + blockX];
-            const uint8_t b = imageInfo.m_pMCUBufB[blockY * mcuPixelWidth + blockX];
-            // Luminance formula: Y = 0.299*R + 0.587*G + 0.114*B
-            // Using integer approximation: (30*R + 59*G + 11*B) / 100
-            gray = (r * 30 + g * 59 + b * 11) / 100;
-          }
-
-          // Store grayscale value in MCU row buffer
-          mcuRowBuffer[blockY * imageInfo.m_width + pixelX] = gray;
-        }
-      }
-    }
-
-    // Write all pixel rows from this MCU row to BMP file
-    const int startRow = mcuY * mcuPixelHeight;
-    const int endRow = (mcuY + 1) * mcuPixelHeight;
-
-    for (int y = startRow; y < endRow && y < imageInfo.m_height; y++) {
-      memset(rowBuffer, 0, bytesPerRow);
-
-      // Pack 4 pixels per byte (2 bits each)
-      for (int x = 0; x < imageInfo.m_width; x++) {
-        const int bufferY = y - startRow;
-        const uint8_t gray = mcuRowBuffer[bufferY * imageInfo.m_width + x];
-        const uint8_t twoBit = grayscaleTo2Bit(gray);
-
-        const int byteIndex = (x * 2) / 8;
-        const int bitOffset = 6 - ((x * 2) % 8);  // 6, 4, 2, 0
-        rowBuffer[byteIndex] |= (twoBit << bitOffset);
-      }
-
-      // Write row with padding
-      bmpOut.write(rowBuffer, bytesPerRow);
-    }
-  }
-
-  // Clean up
-  free(mcuRowBuffer);
-  free(rowBuffer);
-
-  Serial.printf("[%lu] [JPG] Successfully converted JPEG to BMP\n", millis());
-  return true;
-}

lib/JpegToBmpConverter/JpegToBmpConverter.h

@@ -1,15 +0,0 @@
-#pragma once
-
-#include <FS.h>
-
-class ZipFile;
-
-class JpegToBmpConverter {
-  static void writeBmpHeader(Print& bmpOut, int width, int height);
-  static uint8_t grayscaleTo2Bit(uint8_t grayscale);
-  static unsigned char jpegReadCallback(unsigned char* pBuf, unsigned char buf_size,
-                                        unsigned char* pBytes_actually_read, void* pCallback_data);
-
- public:
-  static bool jpegFileToBmpStream(File& jpegFile, Print& bmpOut);
-};

lib/picojpeg/picojpeg.h

@@ -1,124 +0,0 @@
-//------------------------------------------------------------------------------
-// picojpeg - Public domain, Rich Geldreich <richgel99@gmail.com>
-//------------------------------------------------------------------------------
-#ifndef PICOJPEG_H
-#define PICOJPEG_H
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// Error codes
-enum {
-  PJPG_NO_MORE_BLOCKS = 1,
-  PJPG_BAD_DHT_COUNTS,
-  PJPG_BAD_DHT_INDEX,
-  PJPG_BAD_DHT_MARKER,
-  PJPG_BAD_DQT_MARKER,
-  PJPG_BAD_DQT_TABLE,
-  PJPG_BAD_PRECISION,
-  PJPG_BAD_HEIGHT,
-  PJPG_BAD_WIDTH,
-  PJPG_TOO_MANY_COMPONENTS,
-  PJPG_BAD_SOF_LENGTH,
-  PJPG_BAD_VARIABLE_MARKER,
-  PJPG_BAD_DRI_LENGTH,
-  PJPG_BAD_SOS_LENGTH,
-  PJPG_BAD_SOS_COMP_ID,
-  PJPG_W_EXTRA_BYTES_BEFORE_MARKER,
-  PJPG_NO_ARITHMITIC_SUPPORT,
-  PJPG_UNEXPECTED_MARKER,
-  PJPG_NOT_JPEG,
-  PJPG_UNSUPPORTED_MARKER,
-  PJPG_BAD_DQT_LENGTH,
-  PJPG_TOO_MANY_BLOCKS,
-  PJPG_UNDEFINED_QUANT_TABLE,
-  PJPG_UNDEFINED_HUFF_TABLE,
-  PJPG_NOT_SINGLE_SCAN,
-  PJPG_UNSUPPORTED_COLORSPACE,
-  PJPG_UNSUPPORTED_SAMP_FACTORS,
-  PJPG_DECODE_ERROR,
-  PJPG_BAD_RESTART_MARKER,
-  PJPG_ASSERTION_ERROR,
-  PJPG_BAD_SOS_SPECTRAL,
-  PJPG_BAD_SOS_SUCCESSIVE,
-  PJPG_STREAM_READ_ERROR,
-  PJPG_NOTENOUGHMEM,
-  PJPG_UNSUPPORTED_COMP_IDENT,
-  PJPG_UNSUPPORTED_QUANT_TABLE,
-  PJPG_UNSUPPORTED_MODE,  // picojpeg doesn't support progressive JPEG's
-};
-
-// Scan types
-typedef enum { PJPG_GRAYSCALE, PJPG_YH1V1, PJPG_YH2V1, PJPG_YH1V2, PJPG_YH2V2 } pjpeg_scan_type_t;
-
-typedef struct {
-  // Image resolution
-  int m_width;
-  int m_height;
-
-  // Number of components (1 or 3)
-  int m_comps;
-
-  // Total number of minimum coded units (MCU's) per row/col.
-  int m_MCUSPerRow;
-  int m_MCUSPerCol;
-
-  // Scan type
-  pjpeg_scan_type_t m_scanType;
-
-  // MCU width/height in pixels (each is either 8 or 16 depending on the scan type)
-  int m_MCUWidth;
-  int m_MCUHeight;
-
-  // m_pMCUBufR, m_pMCUBufG, and m_pMCUBufB are pointers to internal MCU Y or RGB pixel component buffers.
-  // Each time pjpegDecodeMCU() is called successfully these buffers will be filled with 8x8 pixel blocks of Y or RGB
-  // pixels. Each MCU consists of (m_MCUWidth/8)*(m_MCUHeight/8) Y/RGB blocks: 1 for greyscale/no subsampling, 2 for
-  // H1V2/H2V1, or 4 blocks for H2V2 sampling factors. Each block is a contiguous array of 64 (8x8) bytes of a single
-  // component: either Y for grayscale images, or R, G or B components for color images.
-  //
-  // The 8x8 pixel blocks are organized in these byte arrays like this:
-  //
-  // PJPG_GRAYSCALE: Each MCU is decoded to a single block of 8x8 grayscale pixels.
-  // Only the values in m_pMCUBufR are valid. Each 8 bytes is a row of pixels (raster order: left to right, top to
-  // bottom) from the 8x8 block.
-  //
-  // PJPG_H1V1: Each MCU contains is decoded to a single block of 8x8 RGB pixels.
-  //
-  // PJPG_YH2V1: Each MCU is decoded to 2 blocks, or 16x8 pixels.
-  // The 2 RGB blocks are at byte offsets: 0, 64
-  //
-  // PJPG_YH1V2: Each MCU is decoded to 2 blocks, or 8x16 pixels.
-  // The 2 RGB blocks are at byte offsets: 0,
-  //                                       128
-  //
-  // PJPG_YH2V2: Each MCU is decoded to 4 blocks, or 16x16 pixels.
-  // The 2x2 block array is organized at byte offsets:   0,  64,
-  //                                                   128, 192
-  //
-  // It is up to the caller to copy or blit these pixels from these buffers into the destination bitmap.
-  unsigned char* m_pMCUBufR;
-  unsigned char* m_pMCUBufG;
-  unsigned char* m_pMCUBufB;
-} pjpeg_image_info_t;
-
-typedef unsigned char (*pjpeg_need_bytes_callback_t)(unsigned char* pBuf, unsigned char buf_size,
-                                                     unsigned char* pBytes_actually_read, void* pCallback_data);
-
-// Initializes the decompressor. Returns 0 on success, or one of the above error codes on failure.
-// pNeed_bytes_callback will be called to fill the decompressor's internal input buffer.
-// If reduce is 1, only the first pixel of each block will be decoded. This mode is much faster because it skips the AC
-// dequantization, IDCT and chroma upsampling of every image pixel. Not thread safe.
-unsigned char pjpeg_decode_init(pjpeg_image_info_t* pInfo, pjpeg_need_bytes_callback_t pNeed_bytes_callback,
-                                void* pCallback_data, unsigned char reduce);
-
-// Decompresses the file's next MCU. Returns 0 on success, PJPG_NO_MORE_BLOCKS if no more blocks are available, or an
-// error code. Must be called a total of m_MCUSPerRow*m_MCUSPerCol times to completely decompress the image. Not thread
-// safe.
-unsigned char pjpeg_decode_mcu(void);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // PICOJPEG_H

platformio.ini

@@ -1,5 +1,5 @@
 [platformio]
-crosspoint_version = 0.8.0
+crosspoint_version = 0.7.0
 default_envs = default
 
 [base]

src/CrossPointSettings.cpp

@@ -23,7 +23,7 @@ bool CrossPointSettings::saveToFile() const {
   std::ofstream outputFile(SETTINGS_FILE);
   serialization::writePod(outputFile, SETTINGS_FILE_VERSION);
   serialization::writePod(outputFile, SETTINGS_COUNT);
-  serialization::writePod(outputFile, sleepScreen);
+  serialization::writePod(outputFile, whiteSleepScreen);
   serialization::writePod(outputFile, extraParagraphSpacing);
   serialization::writePod(outputFile, shortPwrBtn);
   outputFile.close();
@@ -54,7 +54,7 @@ bool CrossPointSettings::loadFromFile() {
   // load settings that exist
   uint8_t settingsRead = 0;
   do {
-    serialization::readPod(inputFile, sleepScreen);
+    serialization::readPod(inputFile, whiteSleepScreen);
     if (++settingsRead >= fileSettingsCount) break;
     serialization::readPod(inputFile, extraParagraphSpacing);
     if (++settingsRead >= fileSettingsCount) break;

src/CrossPointSettings.h

@@ -15,11 +15,8 @@ class CrossPointSettings {
   CrossPointSettings(const CrossPointSettings&) = delete;
   CrossPointSettings& operator=(const CrossPointSettings&) = delete;
 
-  // Should match with SettingsActivity text
-  enum SLEEP_SCREEN_MODE { DARK = 0, LIGHT = 1, CUSTOM = 2, COVER = 3 };
-
   // Sleep screen settings
-  uint8_t sleepScreen = DARK;
+  uint8_t whiteSleepScreen = 0;
   // Text rendering settings
   uint8_t extraParagraphSpacing = 1;
   // Duration of the power button press

src/activities/Activity.h

@@ -1,22 +1,19 @@
 #pragma once
 #include <InputManager.h>
 
-#include <utility>
-
 class GfxRenderer;
 
 class Activity {
  protected:
-  std::string name;
   GfxRenderer& renderer;
   InputManager& inputManager;
 
  public:
-  explicit Activity(std::string name, GfxRenderer& renderer, InputManager& inputManager)
-      : name(std::move(name)), renderer(renderer), inputManager(inputManager) {}
+  explicit Activity(GfxRenderer& renderer, InputManager& inputManager)
+      : renderer(renderer), inputManager(inputManager) {}
   virtual ~Activity() = default;
-  virtual void onEnter() { Serial.printf("[%lu] [ACT] Entering activity: %s\n", millis(), name.c_str()); }
-  virtual void onExit() { Serial.printf("[%lu] [ACT] Exiting activity: %s\n", millis(), name.c_str()); }
+  virtual void onEnter() {}
+  virtual void onExit() {}
   virtual void loop() {}
   virtual bool skipLoopDelay() { return false; }
 };

src/activities/ActivityWithSubactivity.cpp

@@ -18,7 +18,4 @@ void ActivityWithSubactivity::loop() {
   }
 }
 
-void ActivityWithSubactivity::onExit() {
-  Activity::onExit();
-  exitActivity();
-}
+void ActivityWithSubactivity::onExit() { exitActivity(); }

src/activities/ActivityWithSubactivity.h

@@ -10,8 +10,8 @@ class ActivityWithSubactivity : public Activity {
   void enterNewActivity(Activity* activity);
 
  public:
-  explicit ActivityWithSubactivity(std::string name, GfxRenderer& renderer, InputManager& inputManager)
-      : Activity(std::move(name), renderer, inputManager) {}
+  explicit ActivityWithSubactivity(GfxRenderer& renderer, InputManager& inputManager)
+      : Activity(renderer, inputManager) {}
   void loop() override;
   void onExit() override;
 };

src/activities/boot_sleep/BootActivity.cpp

@@ -6,8 +6,6 @@
 #include "images/CrossLarge.h"
 
 void BootActivity::onEnter() {
-  Activity::onEnter();
-
   const auto pageWidth = GfxRenderer::getScreenWidth();
   const auto pageHeight = GfxRenderer::getScreenHeight();
 

src/activities/boot_sleep/BootActivity.h

@@ -3,6 +3,6 @@
 
 class BootActivity final : public Activity {
  public:
-  explicit BootActivity(GfxRenderer& renderer, InputManager& inputManager) : Activity("Boot", renderer, inputManager) {}
+  explicit BootActivity(GfxRenderer& renderer, InputManager& inputManager) : Activity(renderer, inputManager) {}
   void onEnter() override;
 };

src/activities/boot_sleep/SleepActivity.cpp

@@ -1,46 +1,16 @@
 #include "SleepActivity.h"
 
-#include <Epub.h>
 #include <GfxRenderer.h>
 #include <SD.h>
 
 #include <vector>
 
 #include "CrossPointSettings.h"
-#include "CrossPointState.h"
 #include "config.h"
 #include "images/CrossLarge.h"
 
 void SleepActivity::onEnter() {
-  Activity::onEnter();
   renderPopup("Entering Sleep...");
-
-  if (SETTINGS.sleepScreen == CrossPointSettings::SLEEP_SCREEN_MODE::CUSTOM) {
-    return renderCustomSleepScreen();
-  }
-
-  if (SETTINGS.sleepScreen == CrossPointSettings::SLEEP_SCREEN_MODE::COVER) {
-    return renderCoverSleepScreen();
-  }
-
-  renderDefaultSleepScreen();
-}
-
-void SleepActivity::renderPopup(const char* message) const {
-  const int textWidth = renderer.getTextWidth(READER_FONT_ID, message);
-  constexpr int margin = 20;
-  const int x = (renderer.getScreenWidth() - textWidth - margin * 2) / 2;
-  constexpr int y = 117;
-  const int w = textWidth + margin * 2;
-  const int h = renderer.getLineHeight(READER_FONT_ID) + margin * 2;
-  // renderer.clearScreen();
-  renderer.fillRect(x + 5, y + 5, w - 10, h - 10, false);
-  renderer.drawText(READER_FONT_ID, x + margin, y + margin, message);
-  renderer.drawRect(x + 5, y + 5, w - 10, h - 10);
-  renderer.displayBuffer();
-}
-
-void SleepActivity::renderCustomSleepScreen() const {
   // Check if we have a /sleep directory
   auto dir = SD.open("/sleep");
   if (dir && dir.isDirectory()) {
@@ -58,31 +28,31 @@ void SleepActivity::renderCustomSleepScreen() const {
       }
 
       if (filename.substr(filename.length() - 4) != ".bmp") {
-        Serial.printf("[%lu] [SLP] Skipping non-.bmp file name: %s\n", millis(), file.name());
+        Serial.printf("[%lu] [Slp] Skipping non-.bmp file name: %s\n", millis(), file.name());
         file.close();
         continue;
       }
       Bitmap bitmap(file);
       if (bitmap.parseHeaders() != BmpReaderError::Ok) {
-        Serial.printf("[%lu] [SLP] Skipping invalid BMP file: %s\n", millis(), file.name());
+        Serial.printf("[%lu] [Slp] Skipping invalid BMP file: %s\n", millis(), file.name());
         file.close();
         continue;
       }
       files.emplace_back(filename);
       file.close();
     }
-    const auto numFiles = files.size();
+    int numFiles = files.size();
     if (numFiles > 0) {
       // Generate a random number between 1 and numFiles
-      const auto randomFileIndex = random(numFiles);
-      const auto filename = "/sleep/" + files[randomFileIndex];
+      int randomFileIndex = random(numFiles);
+      auto filename = "/sleep/" + files[randomFileIndex];
       auto file = SD.open(filename.c_str());
       if (file) {
-        Serial.printf("[%lu] [SLP] Randomly loading: /sleep/%s\n", millis(), files[randomFileIndex].c_str());
+        Serial.printf("[%lu] [Slp] Randomly loading: /sleep/%s\n", millis(), files[randomFileIndex].c_str());
         delay(100);
         Bitmap bitmap(file);
         if (bitmap.parseHeaders() == BmpReaderError::Ok) {
-          renderBitmapSleepScreen(bitmap);
+          renderCustomSleepScreen(bitmap);
           dir.close();
           return;
         }
@@ -97,8 +67,8 @@ void SleepActivity::renderCustomSleepScreen() const {
   if (file) {
     Bitmap bitmap(file);
     if (bitmap.parseHeaders() == BmpReaderError::Ok) {
-      Serial.printf("[%lu] [SLP] Loading: /sleep.bmp\n", millis());
-      renderBitmapSleepScreen(bitmap);
+      Serial.printf("[%lu] [Slp] Loading: /sleep.bmp\n", millis());
+      renderCustomSleepScreen(bitmap);
       return;
     }
   }
@@ -106,27 +76,41 @@ void SleepActivity::renderCustomSleepScreen() const {
   renderDefaultSleepScreen();
 }
 
+void SleepActivity::renderPopup(const char* message) const {
+  const int textWidth = renderer.getTextWidth(READER_FONT_ID, message);
+  constexpr int margin = 20;
+  const int x = (GfxRenderer::getScreenWidth() - textWidth - margin * 2) / 2;
+  constexpr int y = 117;
+  const int w = textWidth + margin * 2;
+  const int h = renderer.getLineHeight(READER_FONT_ID) + margin * 2;
+  // renderer.clearScreen();
+  renderer.fillRect(x + 5, y + 5, w - 10, h - 10, false);
+  renderer.drawText(READER_FONT_ID, x + margin, y + margin, message);
+  renderer.drawRect(x + 5, y + 5, w - 10, h - 10);
+  renderer.displayBuffer();
+}
+
 void SleepActivity::renderDefaultSleepScreen() const {
-  const auto pageWidth = renderer.getScreenWidth();
-  const auto pageHeight = renderer.getScreenHeight();
+  const auto pageWidth = GfxRenderer::getScreenWidth();
+  const auto pageHeight = GfxRenderer::getScreenHeight();
 
   renderer.clearScreen();
   renderer.drawImage(CrossLarge, (pageWidth - 128) / 2, (pageHeight - 128) / 2, 128, 128);
   renderer.drawCenteredText(UI_FONT_ID, pageHeight / 2 + 70, "CrossPoint", true, BOLD);
   renderer.drawCenteredText(SMALL_FONT_ID, pageHeight / 2 + 95, "SLEEPING");
 
-  // Make sleep screen dark unless light is selected in settings
-  if (SETTINGS.sleepScreen != CrossPointSettings::SLEEP_SCREEN_MODE::LIGHT) {
+  // Apply white screen if enabled in settings
+  if (!SETTINGS.whiteSleepScreen) {
     renderer.invertScreen();
   }
 
   renderer.displayBuffer(EInkDisplay::HALF_REFRESH);
 }
 
-void SleepActivity::renderBitmapSleepScreen(const Bitmap& bitmap) const {
+void SleepActivity::renderCustomSleepScreen(const Bitmap& bitmap) const {
   int x, y;
-  const auto pageWidth = renderer.getScreenWidth();
-  const auto pageHeight = renderer.getScreenHeight();
+  const auto pageWidth = GfxRenderer::getScreenWidth();
+  const auto pageHeight = GfxRenderer::getScreenHeight();
 
   if (bitmap.getWidth() > pageWidth || bitmap.getHeight() > pageHeight) {
     // image will scale, make sure placement is right
@@ -169,31 +153,3 @@ void SleepActivity::renderBitmapSleepScreen(const Bitmap& bitmap) const {
     renderer.setRenderMode(GfxRenderer::BW);
   }
 }
-
-void SleepActivity::renderCoverSleepScreen() const {
-  if (APP_STATE.openEpubPath.empty()) {
-    return renderDefaultSleepScreen();
-  }
-
-  Epub lastEpub(APP_STATE.openEpubPath, "/.crosspoint");
-  if (!lastEpub.load()) {
-    Serial.println("[SLP] Failed to load last epub");
-    return renderDefaultSleepScreen();
-  }
-
-  if (!lastEpub.generateCoverBmp()) {
-    Serial.println("[SLP] Failed to generate cover bmp");
-    return renderDefaultSleepScreen();
-  }
-
-  auto file = SD.open(lastEpub.getCoverBmpPath().c_str(), FILE_READ);
-  if (file) {
-    Bitmap bitmap(file);
-    if (bitmap.parseHeaders() == BmpReaderError::Ok) {
-      renderBitmapSleepScreen(bitmap);
-      return;
-    }
-  }
-
-  renderDefaultSleepScreen();
-}

src/activities/boot_sleep/SleepActivity.h

@@ -5,14 +5,11 @@ class Bitmap;
 
 class SleepActivity final : public Activity {
  public:
-  explicit SleepActivity(GfxRenderer& renderer, InputManager& inputManager)
-      : Activity("Sleep", renderer, inputManager) {}
+  explicit SleepActivity(GfxRenderer& renderer, InputManager& inputManager) : Activity(renderer, inputManager) {}
   void onEnter() override;
 
  private:
-  void renderPopup(const char* message) const;
   void renderDefaultSleepScreen() const;
-  void renderCustomSleepScreen() const;
-  void renderCoverSleepScreen() const;
-  void renderBitmapSleepScreen(const Bitmap& bitmap) const;
+  void renderCustomSleepScreen(const Bitmap& bitmap) const;
+  void renderPopup(const char* message) const;
 };

src/activities/home/HomeActivity.cpp

@@ -15,8 +15,6 @@ void HomeActivity::taskTrampoline(void* param) {
 }
 
 void HomeActivity::onEnter() {
-  Activity::onEnter();
-
   renderingMutex = xSemaphoreCreateMutex();
 
   selectorIndex = 0;
@@ -33,8 +31,6 @@ void HomeActivity::onEnter() {
 }
 
 void HomeActivity::onExit() {
-  Activity::onExit();
-
   // Wait until not rendering to delete task to avoid killing mid-instruction to EPD
   xSemaphoreTake(renderingMutex, portMAX_DELAY);
   if (displayTaskHandle) {

src/activities/home/HomeActivity.h

@@ -23,7 +23,7 @@ class HomeActivity final : public Activity {
  public:
   explicit HomeActivity(GfxRenderer& renderer, InputManager& inputManager, const std::function<void()>& onReaderOpen,
                         const std::function<void()>& onSettingsOpen, const std::function<void()>& onFileTransferOpen)
-      : Activity("Home", renderer, inputManager),
+      : Activity(renderer, inputManager),
         onReaderOpen(onReaderOpen),
         onSettingsOpen(onSettingsOpen),
         onFileTransferOpen(onFileTransferOpen) {}

src/activities/network/CrossPointWebServerActivity.cpp

@@ -11,8 +11,7 @@ void CrossPointWebServerActivity::taskTrampoline(void* param) {
 }
 
 void CrossPointWebServerActivity::onEnter() {
-  ActivityWithSubactivity::onEnter();
-
+  Serial.printf("[%lu] [WEBACT] ========== CrossPointWebServerActivity onEnter ==========\n", millis());
   Serial.printf("[%lu] [WEBACT] [MEM] Free heap at onEnter: %d bytes\n", millis(), ESP.getFreeHeap());
 
   renderingMutex = xSemaphoreCreateMutex();
@@ -37,13 +36,13 @@ void CrossPointWebServerActivity::onEnter() {
 
   // Launch WiFi selection subactivity
   Serial.printf("[%lu] [WEBACT] Launching WifiSelectionActivity...\n", millis());
-  enterNewActivity(new WifiSelectionActivity(renderer, inputManager,
-                                             [this](const bool connected) { onWifiSelectionComplete(connected); }));
+  wifiSelection.reset(new WifiSelectionActivity(renderer, inputManager,
+                                                [this](bool connected) { onWifiSelectionComplete(connected); }));
+  wifiSelection->onEnter();
 }
 
 void CrossPointWebServerActivity::onExit() {
-  ActivityWithSubactivity::onExit();
-
+  Serial.printf("[%lu] [WEBACT] ========== CrossPointWebServerActivity onExit START ==========\n", millis());
   Serial.printf("[%lu] [WEBACT] [MEM] Free heap at onExit start: %d bytes\n", millis(), ESP.getFreeHeap());
 
   state = WebServerActivityState::SHUTTING_DOWN;
@@ -51,6 +50,14 @@ void CrossPointWebServerActivity::onExit() {
   // Stop the web server first (before disconnecting WiFi)
   stopWebServer();
 
+  // Exit WiFi selection subactivity if still active
+  if (wifiSelection) {
+    Serial.printf("[%lu] [WEBACT] Exiting WifiSelectionActivity...\n", millis());
+    wifiSelection->onExit();
+    wifiSelection.reset();
+    Serial.printf("[%lu] [WEBACT] WifiSelectionActivity exited\n", millis());
+  }
+
   // CRITICAL: Wait for LWIP stack to flush any pending packets
   Serial.printf("[%lu] [WEBACT] Waiting 500ms for network stack to flush pending packets...\n", millis());
   delay(500);
@@ -85,17 +92,20 @@ void CrossPointWebServerActivity::onExit() {
   Serial.printf("[%lu] [WEBACT] Mutex deleted\n", millis());
 
   Serial.printf("[%lu] [WEBACT] [MEM] Free heap at onExit end: %d bytes\n", millis(), ESP.getFreeHeap());
+  Serial.printf("[%lu] [WEBACT] ========== CrossPointWebServerActivity onExit COMPLETE ==========\n", millis());
 }
 
-void CrossPointWebServerActivity::onWifiSelectionComplete(const bool connected) {
+void CrossPointWebServerActivity::onWifiSelectionComplete(bool connected) {
   Serial.printf("[%lu] [WEBACT] WifiSelectionActivity completed, connected=%d\n", millis(), connected);
 
   if (connected) {
     // Get connection info before exiting subactivity
-    connectedIP = static_cast<WifiSelectionActivity*>(subActivity.get())->getConnectedIP();
+    connectedIP = wifiSelection->getConnectedIP();
     connectedSSID = WiFi.SSID().c_str();
 
-    exitActivity();
+    // Exit the wifi selection subactivity
+    wifiSelection->onExit();
+    wifiSelection.reset();
 
     // Start the web server
     startWebServer();
@@ -140,40 +150,47 @@ void CrossPointWebServerActivity::stopWebServer() {
 }
 
 void CrossPointWebServerActivity::loop() {
-  if (subActivity) {
-    // Forward loop to subactivity
-    subActivity->loop();
-    return;
-  }
-
   // Handle different states
-  if (state == WebServerActivityState::SERVER_RUNNING) {
-    // Handle web server requests - call handleClient multiple times per loop
-    // to improve responsiveness and upload throughput
-    if (webServer && webServer->isRunning()) {
-      const unsigned long timeSinceLastHandleClient = millis() - lastHandleClientTime;
+  switch (state) {
+    case WebServerActivityState::WIFI_SELECTION:
+      // Forward loop to WiFi selection subactivity
+      if (wifiSelection) {
+        wifiSelection->loop();
+      }
+      break;
 
-      // Log if there's a significant gap between handleClient calls (>100ms)
-      if (lastHandleClientTime > 0 && timeSinceLastHandleClient > 100) {
-        Serial.printf("[%lu] [WEBACT] WARNING: %lu ms gap since last handleClient\n", millis(),
-                      timeSinceLastHandleClient);
+    case WebServerActivityState::SERVER_RUNNING:
+      // Handle web server requests - call handleClient multiple times per loop
+      // to improve responsiveness and upload throughput
+      if (webServer && webServer->isRunning()) {
+        unsigned long timeSinceLastHandleClient = millis() - lastHandleClientTime;
+
+        // Log if there's a significant gap between handleClient calls (>100ms)
+        if (lastHandleClientTime > 0 && timeSinceLastHandleClient > 100) {
+          Serial.printf("[%lu] [WEBACT] WARNING: %lu ms gap since last handleClient\n", millis(),
+                        timeSinceLastHandleClient);
+        }
+
+        // Call handleClient multiple times to process pending requests faster
+        // This is critical for upload performance - HTTP file uploads send data
+        // in chunks and each handleClient() call processes incoming data
+        constexpr int HANDLE_CLIENT_ITERATIONS = 10;
+        for (int i = 0; i < HANDLE_CLIENT_ITERATIONS && webServer->isRunning(); i++) {
+          webServer->handleClient();
+        }
+        lastHandleClientTime = millis();
       }
 
-      // Call handleClient multiple times to process pending requests faster
-      // This is critical for upload performance - HTTP file uploads send data
-      // in chunks and each handleClient() call processes incoming data
-      constexpr int HANDLE_CLIENT_ITERATIONS = 10;
-      for (int i = 0; i < HANDLE_CLIENT_ITERATIONS && webServer->isRunning(); i++) {
-        webServer->handleClient();
+      // Handle exit on Back button
+      if (inputManager.wasPressed(InputManager::BTN_BACK)) {
+        onGoBack();
+        return;
       }
-      lastHandleClientTime = millis();
-    }
+      break;
 
-    // Handle exit on Back button
-    if (inputManager.wasPressed(InputManager::BTN_BACK)) {
-      onGoBack();
-      return;
-    }
+    case WebServerActivityState::SHUTTING_DOWN:
+      // Do nothing - waiting for cleanup
+      break;
   }
 }
 

src/activities/network/CrossPointWebServerActivity.h

@@ -9,7 +9,6 @@
 
 #include "../Activity.h"
 #include "WifiSelectionActivity.h"
-#include "activities/ActivityWithSubactivity.h"
 #include "server/CrossPointWebServer.h"
 
 // Web server activity states
@@ -27,13 +26,16 @@ enum class WebServerActivityState {
  * - Handles client requests in its loop() function
  * - Cleans up the server and shuts down WiFi on exit
  */
-class CrossPointWebServerActivity final : public ActivityWithSubactivity {
+class CrossPointWebServerActivity final : public Activity {
   TaskHandle_t displayTaskHandle = nullptr;
   SemaphoreHandle_t renderingMutex = nullptr;
   bool updateRequired = false;
   WebServerActivityState state = WebServerActivityState::WIFI_SELECTION;
   const std::function<void()> onGoBack;
 
+  // WiFi selection subactivity
+  std::unique_ptr<WifiSelectionActivity> wifiSelection;
+
   // Web server - owned by this activity
   std::unique_ptr<CrossPointWebServer> webServer;
 
@@ -56,7 +58,7 @@ class CrossPointWebServerActivity final : public ActivityWithSubactivity {
  public:
   explicit CrossPointWebServerActivity(GfxRenderer& renderer, InputManager& inputManager,
                                        const std::function<void()>& onGoBack)
-      : ActivityWithSubactivity("CrossPointWebServer", renderer, inputManager), onGoBack(onGoBack) {}
+      : Activity(renderer, inputManager), onGoBack(onGoBack) {}
   void onEnter() override;
   void onExit() override;
   void loop() override;

src/activities/network/WifiSelectionActivity.cpp

@@ -14,8 +14,6 @@ void WifiSelectionActivity::taskTrampoline(void* param) {
 }
 
 void WifiSelectionActivity::onEnter() {
-  Activity::onEnter();
-
   renderingMutex = xSemaphoreCreateMutex();
 
   // Load saved WiFi credentials
@@ -49,8 +47,7 @@ void WifiSelectionActivity::onEnter() {
 }
 
 void WifiSelectionActivity::onExit() {
-  Activity::onExit();
-
+  Serial.printf("[%lu] [WIFI] ========== WifiSelectionActivity onExit START ==========\n", millis());
   Serial.printf("[%lu] [WIFI] [MEM] Free heap at onExit start: %d bytes\n", millis(), ESP.getFreeHeap());
 
   // Stop any ongoing WiFi scan
@@ -81,6 +78,7 @@ void WifiSelectionActivity::onExit() {
   Serial.printf("[%lu] [WIFI] Mutex deleted\n", millis());
 
   Serial.printf("[%lu] [WIFI] [MEM] Free heap at onExit end: %d bytes\n", millis(), ESP.getFreeHeap());
+  Serial.printf("[%lu] [WIFI] ========== WifiSelectionActivity onExit COMPLETE ==========\n", millis());
 }
 
 void WifiSelectionActivity::startWifiScan() {

src/activities/network/WifiSelectionActivity.h

@@ -98,7 +98,7 @@ class WifiSelectionActivity final : public Activity {
  public:
   explicit WifiSelectionActivity(GfxRenderer& renderer, InputManager& inputManager,
                                  const std::function<void(bool connected)>& onComplete)
-      : Activity("WifiSelection", renderer, inputManager), onComplete(onComplete) {}
+      : Activity(renderer, inputManager), onComplete(onComplete) {}
   void onEnter() override;
   void onExit() override;
   void loop() override;

src/activities/reader/EpubReaderActivity.cpp

@@ -6,7 +6,6 @@
 
 #include "Battery.h"
 #include "CrossPointSettings.h"
-#include "CrossPointState.h"
 #include "EpubReaderChapterSelectionActivity.h"
 #include "config.h"
 
@@ -26,8 +25,6 @@ void EpubReaderActivity::taskTrampoline(void* param) {
 }
 
 void EpubReaderActivity::onEnter() {
-  ActivityWithSubactivity::onEnter();
-
   if (!epub) {
     return;
   }
@@ -47,10 +44,6 @@ void EpubReaderActivity::onEnter() {
     f.close();
   }
 
-  // Save current epub as last opened epub
-  APP_STATE.openEpubPath = epub->getPath();
-  APP_STATE.saveToFile();
-
   // Trigger first update
   updateRequired = true;
 
@@ -63,8 +56,6 @@ void EpubReaderActivity::onEnter() {
 }
 
 void EpubReaderActivity::onExit() {
-  ActivityWithSubactivity::onExit();
-
   // Wait until not rendering to delete task to avoid killing mid-instruction to EPD
   xSemaphoreTake(renderingMutex, portMAX_DELAY);
   if (displayTaskHandle) {
@@ -79,8 +70,8 @@ void EpubReaderActivity::onExit() {
 
 void EpubReaderActivity::loop() {
   // Pass input responsibility to sub activity if exists
-  if (subActivity) {
-    subActivity->loop();
+  if (subAcitivity) {
+    subAcitivity->loop();
     return;
   }
 
@@ -88,11 +79,11 @@ void EpubReaderActivity::loop() {
   if (inputManager.wasPressed(InputManager::BTN_CONFIRM)) {
     // Don't start activity transition while rendering
     xSemaphoreTake(renderingMutex, portMAX_DELAY);
-    exitActivity();
-    enterNewActivity(new EpubReaderChapterSelectionActivity(
+    subAcitivity.reset(new EpubReaderChapterSelectionActivity(
         this->renderer, this->inputManager, epub, currentSpineIndex,
         [this] {
-          exitActivity();
+          subAcitivity->onExit();
+          subAcitivity.reset();
           updateRequired = true;
         },
         [this](const int newSpineIndex) {
@@ -101,9 +92,11 @@ void EpubReaderActivity::loop() {
             nextPageNumber = 0;
             section.reset();
           }
-          exitActivity();
+          subAcitivity->onExit();
+          subAcitivity.reset();
           updateRequired = true;
         }));
+    subAcitivity->onEnter();
     xSemaphoreGive(renderingMutex);
   }
 
@@ -332,8 +325,8 @@ void EpubReaderActivity::renderStatusBar() const {
   constexpr auto textY = 776;
 
   // Calculate progress in book
-  const float sectionChapterProg = static_cast<float>(section->currentPage) / section->pageCount;
-  const uint8_t bookProgress = epub->calculateProgress(currentSpineIndex, sectionChapterProg);
+  float sectionChapterProg = static_cast<float>(section->currentPage) / section->pageCount;
+  uint8_t bookProgress = epub->calculateProgress(currentSpineIndex, sectionChapterProg);
 
   // Right aligned text for progress counter
   const std::string progress = std::to_string(section->currentPage + 1) + "/" + std::to_string(section->pageCount) +

src/activities/reader/EpubReaderActivity.h

@@ -5,13 +5,14 @@
 #include <freertos/semphr.h>
 #include <freertos/task.h>
 
-#include "activities/ActivityWithSubactivity.h"
+#include "../Activity.h"
 
-class EpubReaderActivity final : public ActivityWithSubactivity {
+class EpubReaderActivity final : public Activity {
   std::shared_ptr<Epub> epub;
   std::unique_ptr<Section> section = nullptr;
   TaskHandle_t displayTaskHandle = nullptr;
   SemaphoreHandle_t renderingMutex = nullptr;
+  std::unique_ptr<Activity> subAcitivity = nullptr;
   int currentSpineIndex = 0;
   int nextPageNumber = 0;
   int pagesUntilFullRefresh = 0;
@@ -27,7 +28,7 @@ class EpubReaderActivity final : public ActivityWithSubactivity {
  public:
   explicit EpubReaderActivity(GfxRenderer& renderer, InputManager& inputManager, std::unique_ptr<Epub> epub,
                               const std::function<void()>& onGoBack)
-      : ActivityWithSubactivity("EpubReader", renderer, inputManager), epub(std::move(epub)), onGoBack(onGoBack) {}
+      : Activity(renderer, inputManager), epub(std::move(epub)), onGoBack(onGoBack) {}
   void onEnter() override;
   void onExit() override;
   void loop() override;

src/activities/reader/EpubReaderChapterSelectionActivity.cpp

@@ -5,10 +5,8 @@
 
 #include "config.h"
 
-namespace {
 constexpr int PAGE_ITEMS = 24;
 constexpr int SKIP_PAGE_MS = 700;
-}  // namespace
 
 void EpubReaderChapterSelectionActivity::taskTrampoline(void* param) {
   auto* self = static_cast<EpubReaderChapterSelectionActivity*>(param);
@@ -16,8 +14,6 @@ void EpubReaderChapterSelectionActivity::taskTrampoline(void* param) {
 }
 
 void EpubReaderChapterSelectionActivity::onEnter() {
-  Activity::onEnter();
-
   if (!epub) {
     return;
   }
@@ -36,8 +32,6 @@ void EpubReaderChapterSelectionActivity::onEnter() {
 }
 
 void EpubReaderChapterSelectionActivity::onExit() {
-  Activity::onExit();
-
   // Wait until not rendering to delete task to avoid killing mid-instruction to EPD
   xSemaphoreTake(renderingMutex, portMAX_DELAY);
   if (displayTaskHandle) {

src/activities/reader/EpubReaderChapterSelectionActivity.h

@@ -27,7 +27,7 @@ class EpubReaderChapterSelectionActivity final : public Activity {
                                               const std::shared_ptr<Epub>& epub, const int currentSpineIndex,
                                               const std::function<void()>& onGoBack,
                                               const std::function<void(int newSpineIndex)>& onSelectSpineIndex)
-      : Activity("EpubReaderChapterSelection", renderer, inputManager),
+      : Activity(renderer, inputManager),
         epub(epub),
         currentSpineIndex(currentSpineIndex),
         onGoBack(onGoBack),

src/activities/reader/FileSelectionActivity.cpp

@@ -5,11 +5,6 @@
 
 #include "config.h"
 
-namespace {
-constexpr int PAGE_ITEMS = 23;
-constexpr int SKIP_PAGE_MS = 700;
-}  // namespace
-
 void sortFileList(std::vector<std::string>& strs) {
   std::sort(begin(strs), end(strs), [](const std::string& str1, const std::string& str2) {
     if (str1.back() == '/' && str2.back() != '/') return true;
@@ -48,8 +43,6 @@ void FileSelectionActivity::loadFiles() {
 }
 
 void FileSelectionActivity::onEnter() {
-  Activity::onEnter();
-
   renderingMutex = xSemaphoreCreateMutex();
 
   basepath = "/";
@@ -68,8 +61,6 @@ void FileSelectionActivity::onEnter() {
 }
 
 void FileSelectionActivity::onExit() {
-  Activity::onExit();
-
   // Wait until not rendering to delete task to avoid killing mid-instruction to EPD
   xSemaphoreTake(renderingMutex, portMAX_DELAY);
   if (displayTaskHandle) {
@@ -82,12 +73,10 @@ void FileSelectionActivity::onExit() {
 }
 
 void FileSelectionActivity::loop() {
-  const bool prevReleased =
-      inputManager.wasReleased(InputManager::BTN_UP) || inputManager.wasReleased(InputManager::BTN_LEFT);
-  const bool nextReleased =
-      inputManager.wasReleased(InputManager::BTN_DOWN) || inputManager.wasReleased(InputManager::BTN_RIGHT);
-
-  const bool skipPage = inputManager.getHeldTime() > SKIP_PAGE_MS;
+  const bool prevPressed =
+      inputManager.wasPressed(InputManager::BTN_UP) || inputManager.wasPressed(InputManager::BTN_LEFT);
+  const bool nextPressed =
+      inputManager.wasPressed(InputManager::BTN_DOWN) || inputManager.wasPressed(InputManager::BTN_RIGHT);
 
   if (inputManager.wasPressed(InputManager::BTN_CONFIRM)) {
     if (files.empty()) {
@@ -112,19 +101,11 @@ void FileSelectionActivity::loop() {
       // At root level, go back home
       onGoHome();
     }
-  } else if (prevReleased) {
-    if (skipPage) {
-      selectorIndex = ((selectorIndex / PAGE_ITEMS - 1) * PAGE_ITEMS + files.size()) % files.size();
-    } else {
-      selectorIndex = (selectorIndex + files.size() - 1) % files.size();
-    }
+  } else if (prevPressed) {
+    selectorIndex = (selectorIndex + files.size() - 1) % files.size();
     updateRequired = true;
-  } else if (nextReleased) {
-    if (skipPage) {
-      selectorIndex = ((selectorIndex / PAGE_ITEMS + 1) * PAGE_ITEMS) % files.size();
-    } else {
-      selectorIndex = (selectorIndex + 1) % files.size();
-    }
+  } else if (nextPressed) {
+    selectorIndex = (selectorIndex + 1) % files.size();
     updateRequired = true;
   }
 }
@@ -145,27 +126,21 @@ void FileSelectionActivity::render() const {
   renderer.clearScreen();
 
   const auto pageWidth = GfxRenderer::getScreenWidth();
-  renderer.drawCenteredText(READER_FONT_ID, 10, "Books", true, BOLD);
+  renderer.drawCenteredText(READER_FONT_ID, 10, "CrossPoint Reader", true, BOLD);
 
   // Help text
   renderer.drawText(SMALL_FONT_ID, 20, GfxRenderer::getScreenHeight() - 30, "Press BACK for Home");
 
   if (files.empty()) {
     renderer.drawText(UI_FONT_ID, 20, 60, "No EPUBs found");
-    renderer.displayBuffer();
-    return;
-  }
+  } else {
+    // Draw selection
+    renderer.fillRect(0, 60 + selectorIndex * 30 + 2, pageWidth - 1, 30);
 
-  const auto pageStartIndex = selectorIndex / PAGE_ITEMS * PAGE_ITEMS;
-  renderer.fillRect(0, 60 + (selectorIndex % PAGE_ITEMS) * 30 + 2, pageWidth - 1, 30);
-  for (int i = pageStartIndex; i < files.size() && i < pageStartIndex + PAGE_ITEMS; i++) {
-    auto item = files[i];
-    int itemWidth = renderer.getTextWidth(UI_FONT_ID, item.c_str());
-    while (itemWidth > renderer.getScreenWidth() - 40 && item.length() > 8) {
-      item.replace(item.length() - 5, 5, "...");
-      itemWidth = renderer.getTextWidth(UI_FONT_ID, item.c_str());
+    for (size_t i = 0; i < files.size(); i++) {
+      const auto file = files[i];
+      renderer.drawText(UI_FONT_ID, 20, 60 + i * 30, file.c_str(), i != selectorIndex);
     }
-    renderer.drawText(UI_FONT_ID, 20, 60 + (i % PAGE_ITEMS) * 30, item.c_str(), i != selectorIndex);
   }
 
   renderer.displayBuffer();

src/activities/reader/FileSelectionActivity.h

@@ -28,7 +28,7 @@ class FileSelectionActivity final : public Activity {
   explicit FileSelectionActivity(GfxRenderer& renderer, InputManager& inputManager,
                                  const std::function<void(const std::string&)>& onSelect,
                                  const std::function<void()>& onGoHome)
-      : Activity("FileSelection", renderer, inputManager), onSelect(onSelect), onGoHome(onGoHome) {}
+      : Activity(renderer, inputManager), onSelect(onSelect), onGoHome(onGoHome) {}
   void onEnter() override;
   void onExit() override;
   void loop() override;

src/activities/reader/ReaderActivity.cpp

@@ -2,6 +2,7 @@
 
 #include <SD.h>
 
+#include "CrossPointState.h"
 #include "Epub.h"
 #include "EpubReaderActivity.h"
 #include "FileSelectionActivity.h"
@@ -28,6 +29,8 @@ void ReaderActivity::onSelectEpubFile(const std::string& path) {
 
   auto epub = loadEpub(path);
   if (epub) {
+    APP_STATE.openEpubPath = path;
+    APP_STATE.saveToFile();
     onGoToEpubReader(std::move(epub));
   } else {
     exitActivity();
@@ -50,8 +53,6 @@ void ReaderActivity::onGoToEpubReader(std::unique_ptr<Epub> epub) {
 }
 
 void ReaderActivity::onEnter() {
-  ActivityWithSubactivity::onEnter();
-
   if (initialEpubPath.empty()) {
     onGoToFileSelection();
     return;

src/activities/reader/ReaderActivity.h

@@ -17,7 +17,7 @@ class ReaderActivity final : public ActivityWithSubactivity {
  public:
   explicit ReaderActivity(GfxRenderer& renderer, InputManager& inputManager, std::string initialEpubPath,
                           const std::function<void()>& onGoBack)
-      : ActivityWithSubactivity("Reader", renderer, inputManager),
+      : ActivityWithSubactivity(renderer, inputManager),
         initialEpubPath(std::move(initialEpubPath)),
         onGoBack(onGoBack) {}
   void onEnter() override;

src/activities/settings/SettingsActivity.cpp

@@ -6,14 +6,11 @@
 #include "config.h"
 
 // Define the static settings list
-namespace {
-constexpr int settingsCount = 3;
-const SettingInfo settingsList[settingsCount] = {
-    // Should match with SLEEP_SCREEN_MODE
-    {"Sleep Screen", SettingType::ENUM, &CrossPointSettings::sleepScreen, {"Dark", "Light", "Custom", "Cover"}},
-    {"Extra Paragraph Spacing", SettingType::TOGGLE, &CrossPointSettings::extraParagraphSpacing, {}},
-    {"Short Power Button Click", SettingType::TOGGLE, &CrossPointSettings::shortPwrBtn, {}}};
-}  // namespace
+
+const SettingInfo SettingsActivity::settingsList[settingsCount] = {
+    {"White Sleep Screen", SettingType::TOGGLE, &CrossPointSettings::whiteSleepScreen},
+    {"Extra Paragraph Spacing", SettingType::TOGGLE, &CrossPointSettings::extraParagraphSpacing},
+    {"Short Power Button Click", SettingType::TOGGLE, &CrossPointSettings::shortPwrBtn}};
 
 void SettingsActivity::taskTrampoline(void* param) {
   auto* self = static_cast<SettingsActivity*>(param);
@@ -21,8 +18,6 @@ void SettingsActivity::taskTrampoline(void* param) {
 }
 
 void SettingsActivity::onEnter() {
-  Activity::onEnter();
-
   renderingMutex = xSemaphoreCreateMutex();
 
   // Reset selection to first item
@@ -40,8 +35,6 @@ void SettingsActivity::onEnter() {
 }
 
 void SettingsActivity::onExit() {
-  Activity::onExit();
-
   // Wait until not rendering to delete task to avoid killing mid-instruction to EPD
   xSemaphoreTake(renderingMutex, portMAX_DELAY);
   if (displayTaskHandle) {
@@ -80,7 +73,7 @@ void SettingsActivity::loop() {
   }
 }
 
-void SettingsActivity::toggleCurrentSetting() const {
+void SettingsActivity::toggleCurrentSetting() {
   // Validate index
   if (selectedSettingIndex < 0 || selectedSettingIndex >= settingsCount) {
     return;
@@ -88,18 +81,15 @@ void SettingsActivity::toggleCurrentSetting() const {
 
   const auto& setting = settingsList[selectedSettingIndex];
 
-  if (setting.type == SettingType::TOGGLE && setting.valuePtr != nullptr) {
-    // Toggle the boolean value using the member pointer
-    const bool currentValue = SETTINGS.*(setting.valuePtr);
-    SETTINGS.*(setting.valuePtr) = !currentValue;
-  } else if (setting.type == SettingType::ENUM && setting.valuePtr != nullptr) {
-    const uint8_t currentValue = SETTINGS.*(setting.valuePtr);
-    SETTINGS.*(setting.valuePtr) = (currentValue + 1) % static_cast<uint8_t>(setting.enumValues.size());
-  } else {
-    // Only toggle if it's a toggle type and has a value pointer
+  // Only toggle if it's a toggle type and has a value pointer
+  if (setting.type != SettingType::TOGGLE || setting.valuePtr == nullptr) {
     return;
   }
 
+  // Toggle the boolean value using the member pointer
+  bool currentValue = SETTINGS.*(setting.valuePtr);
+  SETTINGS.*(setting.valuePtr) = !currentValue;
+
   // Save settings when they change
   SETTINGS.saveToFile();
 }
@@ -139,13 +129,8 @@ void SettingsActivity::render() const {
 
     // Draw value based on setting type
     if (settingsList[i].type == SettingType::TOGGLE && settingsList[i].valuePtr != nullptr) {
-      const bool value = SETTINGS.*(settingsList[i].valuePtr);
+      bool value = SETTINGS.*(settingsList[i].valuePtr);
       renderer.drawText(UI_FONT_ID, pageWidth - 80, settingY, value ? "ON" : "OFF");
-    } else if (settingsList[i].type == SettingType::ENUM && settingsList[i].valuePtr != nullptr) {
-      const uint8_t value = SETTINGS.*(settingsList[i].valuePtr);
-      auto valueText = settingsList[i].enumValues[value];
-      const auto width = renderer.getTextWidth(UI_FONT_ID, valueText.c_str());
-      renderer.drawText(UI_FONT_ID, pageWidth - 50 - width, settingY, valueText.c_str());
     }
   }
 

src/activities/settings/SettingsActivity.h

@@ -12,14 +12,13 @@
 
 class CrossPointSettings;
 
-enum class SettingType { TOGGLE, ENUM };
+enum class SettingType { TOGGLE };
 
 // Structure to hold setting information
 struct SettingInfo {
   const char* name;                        // Display name of the setting
   SettingType type;                        // Type of setting
-  uint8_t CrossPointSettings::* valuePtr;  // Pointer to member in CrossPointSettings (for TOGGLE/ENUM)
-  std::vector<std::string> enumValues;
+  uint8_t CrossPointSettings::* valuePtr;  // Pointer to member in CrossPointSettings (for TOGGLE)
 };
 
 class SettingsActivity final : public Activity {
@@ -29,14 +28,18 @@ class SettingsActivity final : public Activity {
   int selectedSettingIndex = 0;  // Currently selected setting
   const std::function<void()> onGoHome;
 
+  // Static settings list
+  static constexpr int settingsCount = 3;  // Number of settings
+  static const SettingInfo settingsList[settingsCount];
+
   static void taskTrampoline(void* param);
   [[noreturn]] void displayTaskLoop();
   void render() const;
-  void toggleCurrentSetting() const;
+  void toggleCurrentSetting();
 
  public:
   explicit SettingsActivity(GfxRenderer& renderer, InputManager& inputManager, const std::function<void()>& onGoHome)
-      : Activity("Settings", renderer, inputManager), onGoHome(onGoHome) {}
+      : Activity(renderer, inputManager), onGoHome(onGoHome) {}
   void onEnter() override;
   void onExit() override;
   void loop() override;

src/activities/util/FullScreenMessageActivity.cpp

@@ -5,8 +5,6 @@
 #include "config.h"
 
 void FullScreenMessageActivity::onEnter() {
-  Activity::onEnter();
-
   const auto height = renderer.getLineHeight(UI_FONT_ID);
   const auto top = (GfxRenderer::getScreenHeight() - height) / 2;
 

src/activities/util/FullScreenMessageActivity.h

@@ -16,9 +16,6 @@ class FullScreenMessageActivity final : public Activity {
   explicit FullScreenMessageActivity(GfxRenderer& renderer, InputManager& inputManager, std::string text,
                                      const EpdFontStyle style = REGULAR,
                                      const EInkDisplay::RefreshMode refreshMode = EInkDisplay::FAST_REFRESH)
-      : Activity("FullScreenMessage", renderer, inputManager),
-        text(std::move(text)),
-        style(style),
-        refreshMode(refreshMode) {}
+      : Activity(renderer, inputManager), text(std::move(text)), style(style), refreshMode(refreshMode) {}
   void onEnter() override;
 };

src/activities/util/KeyboardEntryActivity.cpp

@@ -12,6 +12,11 @@ const char* const KeyboardEntryActivity::keyboard[NUM_ROWS] = {
 const char* const KeyboardEntryActivity::keyboardShift[NUM_ROWS] = {"~!@#$%^&*()_+", "QWERTYUIOP{}|", "ASDFGHJKL:\"",
                                                                     "ZXCVBNM<>?", "^  _____<OK"};
 
+KeyboardEntryActivity::KeyboardEntryActivity(GfxRenderer& renderer, InputManager& inputManager,
+                                             const std::string& title, const std::string& initialText, size_t maxLength,
+                                             bool isPassword)
+    : Activity(renderer, inputManager), title(title), text(initialText), maxLength(maxLength), isPassword(isPassword) {}
+
 void KeyboardEntryActivity::setText(const std::string& newText) {
   text = newText;
   if (maxLength > 0 && text.length() > maxLength) {
@@ -32,13 +37,15 @@ void KeyboardEntryActivity::reset(const std::string& newTitle, const std::string
 }
 
 void KeyboardEntryActivity::onEnter() {
-  Activity::onEnter();
-
   // Reset state when entering the activity
   complete = false;
   cancelled = false;
 }
 
+void KeyboardEntryActivity::onExit() {
+  // Clean up if needed
+}
+
 void KeyboardEntryActivity::loop() {
   handleInput();
   render(10);

src/activities/util/KeyboardEntryActivity.h

@@ -34,12 +34,7 @@ class KeyboardEntryActivity : public Activity {
    * @param isPassword If true, display asterisks instead of actual characters
    */
   KeyboardEntryActivity(GfxRenderer& renderer, InputManager& inputManager, const std::string& title = "Enter Text",
-                        const std::string& initialText = "", const size_t maxLength = 0, const bool isPassword = false)
-      : Activity("KeyboardEntry", renderer, inputManager),
-        title(title),
-        text(initialText),
-        maxLength(maxLength),
-        isPassword(isPassword) {}
+                        const std::string& initialText = "", size_t maxLength = 0, bool isPassword = false);
 
   /**
    * Handle button input. Call this in your main loop.
@@ -90,6 +85,7 @@ class KeyboardEntryActivity : public Activity {
 
   // Activity overrides
   void onEnter() override;
+  void onExit() override;
   void loop() override;
 
  private:

src/config.h

@@ -26,4 +26,4 @@
  *    "./lib/EpdFont/builtinFonts/pixelarial14.h",
  *  ].map{|f| Digest::SHA256.hexdigest(File.read(f)).to_i(16) }.sum % (2 ** 32) - (2 ** 31)'
  */
-#define SMALL_FONT_ID 1482513144
+#define SMALL_FONT_ID (-139796914)

src/main.cpp

@@ -119,12 +119,14 @@ void enterDeepSleep() {
   exitActivity();
   enterNewActivity(new SleepActivity(renderer, inputManager));
 
+  Serial.printf("[%lu] [   ] Entering deep sleep.\n", millis());
+  delay(1000);  // Allow Serial buffer to empty and display to update
+
+  // Enable Wakeup on LOW (button press)
+  esp_deep_sleep_enable_gpio_wakeup(1ULL << InputManager::POWER_BUTTON_PIN, ESP_GPIO_WAKEUP_GPIO_LOW);
+
   einkDisplay.deepSleep();
 
-  Serial.printf("[%lu] [   ] Entering deep sleep.\n", millis());
-  esp_deep_sleep_enable_gpio_wakeup(1ULL << InputManager::POWER_BUTTON_PIN, ESP_GPIO_WAKEUP_GPIO_LOW);
-  // Ensure that the power button has been released to avoid immediately turning back on if you're holding it
-  waitForPowerRelease();
   // Enter Deep Sleep
   esp_deep_sleep_start();
 }
@@ -192,11 +194,7 @@ void setup() {
   if (APP_STATE.openEpubPath.empty()) {
     onGoHome();
   } else {
-    // Clear app state to avoid getting into a boot loop if the epub doesn't load
-    const auto path = APP_STATE.openEpubPath;
-    APP_STATE.openEpubPath = "";
-    APP_STATE.saveToFile();
-    onGoToReader(path);
+    onGoToReader(APP_STATE.openEpubPath);
   }
 
   // Ensure we're not still holding the power button before leaving setup
@@ -229,7 +227,7 @@ void loop() {
     return;
   }
 
-  if (inputManager.isPressed(InputManager::BTN_POWER) &&
+  if (inputManager.wasReleased(InputManager::BTN_POWER) &&
       inputManager.getHeldTime() > SETTINGS.getPowerButtonDuration()) {
     enterDeepSleep();
     // This should never be hit as `enterDeepSleep` calls esp_deep_sleep_start