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/lists/tree/mod.rs

@@ -180,7 +180,7 @@ impl RenderOnce for Tree {
         }
         if nav.read(cx).renaming.is_some() && editing.read(cx).field().is_none() {
             nav.update(cx, |nav, _| nav.renaming = None);
-            window.focus(&focus);
+            window.focus(&focus, cx);
         }
         let open: HashSet<SharedString> = opened.read(cx).value.iter().cloned().collect();
         let nodes = Rc::new(self.nodes);
@@ -320,7 +320,7 @@ impl RenderOnce for Tree {
         let list = uniform_list((id.clone(), "rows"), count, move |range, window, cx| {
             draw(&data, range, window, cx)
         })
-        .track_scroll(scroll)
+        .track_scroll(&scroll)
         .size_full();
         self.base
             .id(self.id)

src/lists/tree/row.rs

@@ -219,7 +219,7 @@ fn row(rows: &Rows, ix: usize, window: &mut Window, cx: &mut App) -> AnyElement
         }))
         .children(landing.filter(|at| *at != DropAt::Inside).map(line))
         .on_click(move |event, window, cx| {
-            window.focus(&focus);
+            window.focus(&focus, cx);
             if event.click_count() == 2 {
                 activate(ix, window, cx);
                 return;