fix from CI check

src/CrossPointSettings.h

@@ -67,7 +67,7 @@ class CrossPointSettings {
   uint8_t paragraphAlignment = JUSTIFIED;
   uint8_t sideMargin = MARGIN_SMALL;
   // OPDS browser settings
-  char opdsServerUrl[128] = "";  // e.g., "https://home.jmitch.com/books"
+  char opdsServerUrl[128] = "";
 
   ~CrossPointSettings() = default;
 

src/activities/browser/OpdsBookBrowserActivity.cpp

@@ -385,7 +385,7 @@ std::string OpdsBookBrowserActivity::sanitizeFilename(const std::string& title)
 
   // Limit filename length (SD card FAT32 has 255 char limit, but let's be safe)
   if (result.length() > 100) {
-    result = result.substr(0, 100);
+    result.resize(100);
   }
 
   return result.empty() ? "book" : result;