Messaging · Channels: the chat list, its rows, a channel's head and its pins

ChannelList sets chats down in sections, each a list: a press, an arrow
or Enter opens one, and the open chat is lit. A title names one section,
and a section holds a chat. ChannelItem shows a hash or a lock, its
unread count, a pin when pinned, and goes quiet when muted.
DirectMessageItem shows a person's initials with their presence. Unread
names stand out through ListItem's new strong; muted channels and
offline people go quiet through its quiet. ChannelHeader holds the name
and topic beside members, pins and a call, wrapping by the header rule.
PinnedMessages lists pins newest first; a press, an arrow or Enter opens
one, and Unpin lets one go. With none it shows a line and takes no Tab
stop.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

examples/gallery/pages/mod.rs

@@ -17,6 +17,7 @@ mod layout;
 mod lists;
 mod media;
 mod menus;
+mod messaging;
 mod motion;
 mod navigation;
 mod overlays;
@@ -69,6 +70,7 @@ pub const ALL: &[Page] = &[
     generative::PAGE,
     media::PAGE,
     files::PAGE,
+    messaging::PAGE,
     theme::PAGE,
 ];