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>

src/documents/blocks/tests.rs

@@ -59,7 +59,7 @@ fn caret(editor: &Entity<BlockEditor>, ix: usize, at: usize, cx: &mut VisualTest
     cx.update(|window, cx| {
         let field = editor.read(cx).blocks[ix].fields[0].clone();
         field.update(cx, |field, cx| field.select(at..at, cx));
-        window.focus(&field.focus_handle(cx));
+        window.focus(&field.focus_handle(cx), cx);
     });
     settle(cx);
 }
@@ -211,7 +211,7 @@ fn select(
     cx.update(|window, cx| {
         let field = editor.read(cx).blocks[ix].fields[field].clone();
         field.update(cx, |field, cx| field.select(range, cx));
-        window.focus(&field.focus_handle(cx));
+        window.focus(&field.focus_handle(cx), cx);
     });
     settle(cx);
 }
@@ -280,7 +280,7 @@ fn keys_into_a_merged_cell_land_on_the_cell_that_shows(cx: &mut TestAppContext)
     select(&editor, 0, 0, 1..1, cx);
     cx.update(|window, cx| {
         let field = editor.read(cx).blocks[0].fields[1].clone();
-        window.focus(&field.focus_handle(cx));
+        window.focus(&field.focus_handle(cx), cx);
     });
     settle(cx);
     cx.simulate_keystrokes("down");