Handle message requests safely

Request lifecycle

• Incoming requests appear in the message request list.
• Accepting creates or unlocks normal conversation behavior.
• Rejecting declines the request without opening regular chat access.
• Blocking prevents further request attempts from that source.

Recommended review checklist

1. Check sender alias and known context.
2. Accept only if the sender is expected and trusted.
3. Use block for repeated unknown or suspicious attempts.

Operational note

• Pending request constraints are enforced server-side.
• Requests are designed to reduce unsolicited conversation exposure.