Merge 6c31f7581c into d403044f76

## Rationale 

I have 2 wifi access points with almost identical names, just one has
`_EXT` at the end of it. With the current display limit of 13 characters
before adding ellipsis, I can't tell which is which.

Before device screenshot with masked SSIDs:
<img
src="https://github.com/user-attachments/assets/3c5cbbaa-b2f6-412f-b5a8-6278963bd0f2"
width="300">


## Summary

Adjusted displayed length from 13 characters to 30 in the Wifi selection
screen - I've left some space for potential proportional font changes in
the future

After image with masked SSIDs:
<img
src="https://github.com/user-attachments/assets/c5f0712b-bbd3-4eec-9820-4693fae90c9f"
width="300">

---

### AI Usage

While CrossPoint doesn't have restrictions on AI tools in contributing,
please be transparent about their usage as it
helps set the right context for reviewers.

Did you use AI tools to help write this code? _**< NO >**_

src/CrossPointSettings.h

@@ -15,7 +15,7 @@ class CrossPointSettings {
   CrossPointSettings(const CrossPointSettings&) = delete;
   CrossPointSettings& operator=(const CrossPointSettings&) = delete;
 
-  enum SLEEP_SCREEN_MODE { DARK = 0, LIGHT = 1, CUSTOM = 2, COVER = 3, BLANK = 4, SLEEP_SCREEN_MODE_COUNT };
+  enum SLEEP_SCREEN_MODE { DARK = 0, LIGHT = 1, CUSTOM = 2, COVER = 3, COVERELSECUSTOM = 4, BLANK = 5, SLEEP_SCREEN_MODE_COUNT };
   enum SLEEP_SCREEN_COVER_MODE { FIT = 0, CROP = 1, SLEEP_SCREEN_COVER_MODE_COUNT };
   enum SLEEP_SCREEN_COVER_FILTER {
     NO_FILTER = 0,

src/activities/boot_sleep/SleepActivity.cpp

@@ -30,6 +30,10 @@ void SleepActivity::onEnter() {
     return renderCoverSleepScreen();
   }
 
+  if (SETTINGS.sleepScreen == CrossPointSettings::SLEEP_SCREEN_MODE::COVERELSECUSTOM) {
+    return renderCoverElseCustomSleepScreen();
+  }
+
   renderDefaultSleepScreen();
 }
 
@@ -266,6 +270,75 @@ void SleepActivity::renderCoverSleepScreen() const {
   renderDefaultSleepScreen();
 }
 
+void SleepActivity::renderCoverElseCustomSleepScreen() const {
+  if (APP_STATE.openEpubPath.empty()) {
+    return renderCustomSleepScreen();
+  }
+
+  std::string coverBmpPath;
+  bool cropped = SETTINGS.sleepScreenCoverMode == CrossPointSettings::SLEEP_SCREEN_COVER_MODE::CROP;
+
+  // Check if the current book is XTC, TXT, or EPUB
+  if (StringUtils::checkFileExtension(APP_STATE.openEpubPath, ".xtc") ||
+      StringUtils::checkFileExtension(APP_STATE.openEpubPath, ".xtch")) {
+    // Handle XTC file
+    Xtc lastXtc(APP_STATE.openEpubPath, "/.crosspoint");
+    if (!lastXtc.load()) {
+      Serial.println("[SLP] Failed to load last XTC");
+      return renderCustomSleepScreen();
+    }
+
+    if (!lastXtc.generateCoverBmp()) {
+      Serial.println("[SLP] Failed to generate XTC cover bmp");
+      return renderCustomSleepScreen();
+    }
+
+    coverBmpPath = lastXtc.getCoverBmpPath();
+  } else if (StringUtils::checkFileExtension(APP_STATE.openEpubPath, ".txt")) {
+    // Handle TXT file - looks for cover image in the same folder
+    Txt lastTxt(APP_STATE.openEpubPath, "/.crosspoint");
+    if (!lastTxt.load()) {
+      Serial.println("[SLP] Failed to load last TXT");
+      return renderCustomSleepScreen();
+    }
+
+    if (!lastTxt.generateCoverBmp()) {
+      Serial.println("[SLP] No cover image found for TXT file");
+      return renderCustomSleepScreen();
+    }
+
+    coverBmpPath = lastTxt.getCoverBmpPath();
+  } else if (StringUtils::checkFileExtension(APP_STATE.openEpubPath, ".epub")) {
+    // Handle EPUB file
+    Epub lastEpub(APP_STATE.openEpubPath, "/.crosspoint");
+    if (!lastEpub.load()) {
+      Serial.println("[SLP] Failed to load last epub");
+      return renderCustomSleepScreen();
+    }
+
+    if (!lastEpub.generateCoverBmp(cropped)) {
+      Serial.println("[SLP] Failed to generate cover bmp");
+      return renderCustomSleepScreen();
+    }
+
+    coverBmpPath = lastEpub.getCoverBmpPath(cropped);
+  } else {
+    return renderCustomSleepScreen();
+  }
+
+  FsFile file;
+  if (SdMan.openFileForRead("SLP", coverBmpPath, file)) {
+    Bitmap bitmap(file);
+    if (bitmap.parseHeaders() == BmpReaderError::Ok) {
+      Serial.printf("[SLP] Rendering sleep cover: %s\n", coverBmpPath);
+      renderBitmapSleepScreen(bitmap);
+      return;
+    }
+  }
+
+  renderCustomSleepScreen();
+}
+
 void SleepActivity::renderBlankSleepScreen() const {
   renderer.clearScreen();
   renderer.displayBuffer(HalDisplay::HALF_REFRESH);

src/activities/boot_sleep/SleepActivity.h

@@ -13,6 +13,7 @@ class SleepActivity final : public Activity {
   void renderDefaultSleepScreen() const;
   void renderCustomSleepScreen() const;
   void renderCoverSleepScreen() const;
+  void renderCoverElseCustomSleepScreen() const;
   void renderBitmapSleepScreen(const Bitmap& bitmap) const;
   void renderBlankSleepScreen() const;
 };

src/activities/network/WifiSelectionActivity.cpp

@@ -546,8 +546,8 @@ void WifiSelectionActivity::renderNetworkList() const {
 
       // Draw network name (truncate if too long)
       std::string displayName = network.ssid;
-      if (displayName.length() > 16) {
+      if (displayName.length() > 33) {
-        displayName.replace(13, displayName.length() - 13, "...");
+        displayName.replace(30, displayName.length() - 30, "...");
       }
       renderer.drawText(UI_10_FONT_ID, 20, networkY, displayName.c_str());
 

src/activities/settings/SettingsActivity.cpp

@@ -14,7 +14,7 @@ namespace {
 constexpr int displaySettingsCount = 6;
 const SettingInfo displaySettings[displaySettingsCount] = {
     // Should match with SLEEP_SCREEN_MODE
-    SettingInfo::Enum("Sleep Screen", &CrossPointSettings::sleepScreen, {"Dark", "Light", "Custom", "Cover", "None"}),
+    SettingInfo::Enum("Sleep Screen", &CrossPointSettings::sleepScreen, {"Dark", "Light", "Custom", "Cover", "Cover else Custom", "None"}),
     SettingInfo::Enum("Sleep Screen Cover Mode", &CrossPointSettings::sleepScreenCoverMode, {"Fit", "Crop"}),
     SettingInfo::Enum("Sleep Screen Cover Filter", &CrossPointSettings::sleepScreenCoverFilter,
                       {"None", "Contrast", "Inverted"}),