Method cleanupThumbnailCache

source/core/NotebookLibrary.cpp:558–597

}

void NotebookLibrary::cleanupThumbnailCache()
{
    QDir cacheDir(m_thumbnailCachePath);
    if (!cacheDir.exists()) {
        return;
    }
    
    // Get all PNG files with their info
    QFileInfoList files = cacheDir.entryInfoList({"*.png"}, QDir::Files);
    
    // Calculate total size
    qint64 totalSize = 0;
    for (const auto& fileInfo : files) {
        totalSize += fileInfo.size();
    }
    
    // If under limit, no cleanup needed
    if (totalSize <= MAX_CACHE_SIZE_BYTES) {
        return;
    }
    
    // Sort by last modified time (oldest first for LRU eviction)
    std::sort(files.begin(), files.end(), 
        [](const QFileInfo& a, const QFileInfo& b) {
            return a.lastModified() < b.lastModified();
        });
    
    // Delete oldest files until under limit
    for (const auto& fileInfo : files) {
        if (totalSize <= MAX_CACHE_SIZE_BYTES) {
            break;
        }
        
        qint64 fileSize = fileInfo.size();
        if (QFile::remove(fileInfo.absoluteFilePath())) {
            totalSize -= fileSize;
            // CR-P.2: Removed qDebug for production code
        }
    }
}

// === Persistence ===