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.

src/messaging/mod.rs

@@ -0,0 +1,10 @@
+mod channels;
+mod header;
+mod pins;
+
+#[cfg(all(test, feature = "test-support"))]
+mod tests;
+
+pub use channels::{ChannelItem, ChannelList, ChatRow, DirectMessageItem};
+pub use header::ChannelHeader;
+pub use pins::{PinnedMessage, PinnedMessages};