IAV-1266/feat(sav): wire conversation title update and harden ticket chat thread (!345) · Requêtes de fusion · iavia / iavia-front

abdellatif elkerbani a demandé de fusionner bugfix/IAV-1266 vers develop avr. 01, 2026

Add updateConversationTitle to customer-care agent conversation API, config endpoints, and conversation store.
ticket-detail: normalize ticket conversation payloads, sort by time, stable row keys (createdAt/uid), dedupe optimistic sends after real messages.
Broaden conversation/sender typing (CLIENT vs CUSTOMER, optional uid) and align use-agent-chat / ticket types with backend DTOs.

IAV-1266/feat(sav): wire conversation title update and harden ticket chat thread