SecureBit.chat v4.9.0 — Full redesign + reworked offline mode

A ground-up visual redesign of the entire application, plus a reworked offline experience and WhatsApp-style message delivery status.

Open a secure channel

Encrypted conversation

Redesign

Landing page, "Why unique" / partners / roadmap / community sections, connection setup, in-chat header, real-time security verification report, file transfer, and the PWA install / update / offline / install-guide dialogs.

Offline mode, reworked

• Sending while offline shows a single ✓ and queues the message; it transmits automatically on reconnect, keeping its original send time.
• A message addressed to an offline peer stays at one check until they return — the offline client holds it back and surfaces it on reconnect with a "Connection restored" notice.
• Delivery status on every message: sending → ✓ sent → ✓✓ delivered (peer-acknowledged), plus a clear "not sent" state — via an authenticated delivery-receipt control message.
• Browser offline state no longer leaks into the P2P connection indicator.

Resilient file transfer

Per-chunk segmented progress, receiver-driven retransmission of missing chunks with auto-resume after a connection blip, corrected receive rate limits, and automatic save on completion.

No protocol or cryptography weakening — end-to-end encryption, SAS verification and PFS are unchanged.