Port · Build: Zed's gpui at 1a28cff

gpui and gpui_platform now come from Zed's repo by git at 1a28cff,
the code gpui-pre 0.3.7 republishes, so the gallery can later build
for the browser. gpui takes stacker, as 0.2.2 always did, and
gpui_platform takes font-kit, without which macOS draws no text;
runtime_shaders moves to gpui_platform.

The API moved: focus, blur and Tab steps take cx, Corner is Anchor,
shaped lines paint with an alignment, defer_draw takes a content
mask, the inspector registers a factory, async updates return their
value, and wrapped lines are shared, not cloned. Updates through a
window context go through the window, so a closed window still ends
them as it did.

Where the new gpui behaves differently, Ely keeps its old intent.
Holds and reveals under a resting pointer survive typing through
gpui's input-modality-independent hover; previews the keyboard also
moves keep the default, and the calendar's leave ignores a key press.
Enter reaches a button inside the code editor, since gpui now arms a
key click on the press. The event logger skips a lone modifier. A
video and an image grid keep their shape in a flex column under
taffy 0.13, as a picture does.

AGENTS.md records the new stack and the rules this port changes; the
rest of the old gpui and taffy rules are re-tested in T44c.

src/onboarding/help.rs

@@ -150,8 +150,8 @@ impl RenderOnce for HelpPanel {
         let search_focus = self.search.read(cx).focus().clone();
         let on_open: OnOpen = Rc::new(move |key, window, cx| {
             match key {
-                Some(_) => window.focus(&back_focus),
-                None => window.focus(&search_focus),
+                Some(_) => window.focus(&back_focus, cx),
+                None => window.focus(&search_focus, cx),
             }
             on_open(key, window, cx)
         });

src/onboarding/support.rs

@@ -94,7 +94,7 @@ impl RenderOnce for ContactSupport {
             log::info!("contact support: send about {key}");
             on_send(&key, &words, window, cx);
             emptied.update(cx, |field, cx| field.set_text("", cx));
-            window.focus(&field);
+            window.focus(&field, cx);
         };
         div()
             .flex()

src/onboarding/tests/mod.rs

@@ -92,9 +92,9 @@ fn edit(host: &Entity<Bench>, cx: &mut VisualTestContext, change: impl FnOnce(&m
 
 /// Focus on the `stops`th Tab stop from the top.
 fn tab(stops: usize, cx: &mut VisualTestContext) {
-    cx.update(|window, _| {
-        window.blur();
-        (0..stops).for_each(|_| window.focus_next());
+    cx.update(|window, cx| {
+        window.blur(cx);
+        (0..stops).for_each(|_| window.focus_next(cx));
     });
     settle(cx);
 }