Mail · Writing: the composer, recipients that suggest, a signature, send later

MailComposer writes a message: To, and Cc and Bcc once asked for, as
tag fields that suggest contacts and mark what is not an address; the
subject and the words; the files, each with a way off; the signature
under the words. Send wakes once there is someone to send to and every
address is one; it hands over the draft now or at a time, and Discard
lets it go. A new start from the owner begins the draft over.

forms::TagInput now suggests: the rows that hold the typed words float
under it through the list Combobox uses; Up, Down and Enter pick, and
Escape sets them aside. RecipientInput points to it. ScheduleSend
offers tomorrow morning, tomorrow afternoon, Monday morning, or a day
and hour picked in a dialog. SignatureEditor writes the lines and shows
how they sit under a message; it tells the owner's echo from a new
signature, so the caret stays.

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

examples/gallery/pages/mail/mod.rs

@@ -9,6 +9,7 @@ use gpui::{AnyElement, App, IntoElement, ParentElement, SharedString, Styled, Wi
 use jiff::{SignedDuration, Timestamp};
 
 mod read;
+mod write;
 
 use super::Page;
 use crate::{
@@ -43,6 +44,14 @@ const SCRIPT: &[Step] = &[
     Step::UpAt("mail-thread", 200.0, 120.0),
     Step::Wait(300),
     Step::Shot("thread-opened"),
+    Step::DownAt("mail-composer", 270.0, 31.0),
+    Step::UpAt("mail-composer", 270.0, 31.0),
+    Step::Type("an"),
+    Step::Wait(200),
+    Step::Shot("recipient-suggested"),
+    Step::Key("enter"),
+    Step::Wait(200),
+    Step::Shot("recipient-added"),
 ];
 
 fn boxes(window: &mut Window, cx: &mut App) -> impl IntoElement + use<> {
@@ -212,5 +221,8 @@ fn render(window: &mut Window, cx: &mut App) -> AnyElement {
         .child(zero(cx))
         .child(read::reader(cx))
         .child(read::thread(cx))
+        .child(write::composer(window, cx))
+        .child(write::signature(window, cx))
+        .child(write::schedule(window, cx))
         .into_any_element()
 }