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/overlays/hover.rs

@@ -1,8 +1,9 @@
 use std::{rc::Rc, time::Duration};
 
 use gpui::{
-    AnyElement, App, Bounds, ElementId, Entity, InteractiveElement, IntoElement, ParentElement,
-    Pixels, RenderOnce, StatefulInteractiveElement, Styled, Task, Window, canvas, div,
+    AnyElement, App, Bounds, ElementId, Entity, HoverListenerMode, InteractiveElement, IntoElement,
+    ParentElement, Pixels, RenderOnce, StatefulInteractiveElement, Styled, Task, Window, canvas,
+    div,
 };
 
 use crate::forms::{float_height, surface};
@@ -78,6 +79,7 @@ impl RenderOnce for HoverCard {
             .id(self.id.clone())
             .relative()
             .child(self.trigger)
+            .hover_listener_mode(HoverListenerMode::InputModalityIndependent)
             .on_hover(move |hovered, window, cx| {
                 enter.update(cx, |hover, _| hover.on_trigger = *hovered);
                 settle_after(&enter, if *hovered { OPEN } else { LINGER }, window, cx);
@@ -108,6 +110,7 @@ impl RenderOnce for HoverCard {
             .relative()
             .occlude()
             .p_4()
+            .hover_listener_mode(HoverListenerMode::InputModalityIndependent)
             .on_hover(move |hovered, window, cx| {
                 over.update(cx, |hover, _| hover.on_card = *hovered);
                 settle_after(&over, LINGER, window, cx);