Pass group avatar through notification extras, navigation hrefs, and
route parameters. Update ChatScreen to resolve group information
(ID, name, and avatar) by prioritizing route parameters (e.g., from
push notifications) and falling back to conversation data from the
MessageManager.
- Update `NotificationBootstrap` to include `groupAvatar` in query params
- Update `hrefChat` to support `groupAvatar`
- Refactor `useChatScreen` to use `effectiveGroupId`, `effectiveGroupName`,
and `effectiveGroupAvatar`
- Ensure `MessageManager` fetches conversation details if missing when
activating a conversation
- Update `MessageListScreen` to pass `groupAvatar` during navigation
lan
cbe708b53b