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.

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

examples/gallery/pages/lists/long.rs

@@ -67,7 +67,7 @@ pub fn infinite(window: &mut Window, cx: &mut App) -> impl IntoElement + use<> {
                         let more = more.clone();
                         cx.spawn(async move |cx| {
                             cx.background_executor().timer(Duration::from_millis(700)).await;
-                            cx.update(|cx| set(&more, (rows + PAGE, false), cx)).ok();
+                            cx.update(|cx| set(&more, (rows + PAGE, false), cx));
                         })
                         .detach();
                     }),

examples/gallery/pages/lists/trees.rs

@@ -144,8 +144,7 @@ pub fn tree(window: &mut Window, cx: &mut App) -> impl IntoElement + use<> {
                                     items.push(item("logo", "logo.svg", Some(&key), false));
                                     items.push(item("inter", "Inter.ttf", Some(&key), false));
                                 })
-                            })
-                            .ok();
+                            });
                         })
                         .detach();
                     })