Module delivery 

One delivery vocabulary, rendered the same in every conversation.

A message leaves a composer and may be queued, in flight, handed to a transport, acknowledged by its server, delivered to the other person’s device, read, refused, or left uncertain when the transport cannot say. Chat and Messages learn those facts from different systems, in different words, and each used to print its own: Messages had five honest labels, Chat had none at all except a line saying a send was refused.

DeliveryState is the one vocabulary. A transport maps its own states onto DeliveryStep — a plain rename, no judgement — and DeliveryState decides the word, the glyph and the tone. Both apps paint it through DeliveryFace, so “delivered” looks the same wherever a person meets it, and a state that cannot be known says so instead of pretending.

Structs

DeliveryFace

A delivery state as it is painted: a small glyph and its word, in one line.

Enums

DeliveryState

The state a line shows, in the one vocabulary both apps speak.

DeliveryStep

What a transport reported, before this toolkit decides how to say it.