Method discover

lib/EpdFont/SdCardFontRegistry.cpp:230–250

}

bool SdCardFontRegistry::discover() {
  families_.clear();
  families_.reserve(MAX_SD_FAMILIES);

  // Hidden root is scanned first so it wins on name collisions, matching the
  // sleep-folder pattern (/.sleep preferred over /sleep).
  scanRoot(FONTS_DIR_HIDDEN, families_);
  scanRoot(FONTS_DIR_VISIBLE, families_);

  // Sort families alphabetically
  std::sort(families_.begin(), families_.end(),
            [](const SdCardFontFamilyInfo& a, const SdCardFontFamilyInfo& b) { return a.name < b.name; });

  // Cap at MAX_SD_FAMILIES
  if (static_cast<int>(families_.size()) > MAX_SD_FAMILIES) {
    families_.resize(MAX_SD_FAMILIES);
  }

  LOG_DBG("SDREG", "Discovery complete: %d families", static_cast<int>(families_.size()));
  return !families_.empty();
}

const char* SdCardFontRegistry::findFamilyRoot(const char* familyName) {
  if (!familyName || !*familyName) return nullptr;