E2 FileViewer 3.1 – Initial public release

🎉 First public release of E2 FileViewer – the single‑file file manager that turns any folder into a beautiful, responsive gallery or classic file explorer.

✨ Highlights:

• 📦 One file – no dependencies, no installation
• 🖼️ Gallery & explorer in one – integrated lightbox for media, list view with thumbnails for documents
• 🔒 Secure login with Argon2id/SHA256/plaintext (optional)
• ⬆️ Upload & 🗑️ Delete – optionally enable with CSRF protection
• ⚡ Smart caching – thumbnail cache + snapshot‑based structure cache
• 🚀 ImageBoost – multi‑stage pre‑scaling for faster thumbnails
• 📂 Custom scan directory – point to any folder, even outside webroot
• 🧩 Custom branding – logo, favicon, CSS
• 🛡️ Granular visibility – hide extensions (blacklist/whitelist), ignore system folders

Works out of the box – just upload the file and open it in your browser. Optional config file for fine‑tuning.

📖 Full documentation in the README.