v1.4.6

✨ New: Automatic Certificates (ACME / Let's Encrypt)

Enter a domain in Panel Settings (cert mode → ACME) and 2S-UI
auto-issues and auto-renews a free Let's Encrypt certificate — no certbot, no
cron. Needs port 80 reachable; falls back to HTTP if misconfigured.
See the README for details.

Maintenance

• Keep the Linux script entrypoint at /usr/bin/s-ui for upgrade compatibility.
• Remove /usr/bin/2s-ui references from install/update/uninstall scripts & docs.
• Bump backend & frontend to 1.4.6.