- Centralize horizontal alignment: StreamItemWrapper / contentWrapper own
the chat rail (paddingHorizontal: 8). Stream items stop setting their
own outer horizontal padding. Copy icons get negative margins so the
visible icon sits flush with the rail edges.
- Unify the inline working indicator and assistant turn footer into a
shared slot (minHeight: 24, paddingBottom: 24). No layout shift on
streaming -> idle, and both gain breathing room above the composer
and the next user bubble.
- Equalize the gap on both sides of an assistant message adjacent to a
tool call (20px each). Drop assistantMessageStylesheet.containerSpacing,
which was a redundant marginBottom that only fired in one direction
and duplicated getGapBetween's responsibility.
- Scale up the chevron via transform (size stays 12, viewBox padding no
longer dominates), iconBadge dimensions unchanged. Tool icon and
chevron now read as similar visual weight.
- Shared STREAM_METADATA_FONT_SIZE (13) for user message timestamp,
assistant footer duration/timestamp, and the live elapsed timer.
- formatDuration: one rule for static and live displays - 0-10s as
X.Xs, 10-60s as Xs, minutes/hours integers only. Drops the `mode`
parameter.
- formatMessageTimestamp: explicitly carry the resolved hourCycle so
the runtime applies an OS-level 24h preference when the platform
exposes it (e.g. AppleICUForce24HourTime on macOS).
Mohamed Boudra
37bb168204