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/tooling/events.rs

@@ -7,9 +7,9 @@ use std::{
 
 use gpui::{
     AnyElement, App, DispatchPhase, ElementId, InteractiveElement, IntoElement, KeyContext,
-    Modifiers, MouseButton, MouseDownEvent, MouseMoveEvent, MouseUpEvent, ParentElement, Pixels,
-    Point, RenderOnce, ScrollDelta, ScrollWheelEvent, StatefulInteractiveElement, Styled, Window,
-    canvas, div, prelude::FluentBuilder,
+    Keystroke, Modifiers, MouseButton, MouseDownEvent, MouseMoveEvent, MouseUpEvent, ParentElement,
+    Pixels, Point, RenderOnce, ScrollDelta, ScrollWheelEvent, StatefulInteractiveElement, Styled,
+    Window, canvas, div, prelude::FluentBuilder,
 };
 use smallvec::SmallVec;
 
@@ -43,6 +43,12 @@ fn button(button: MouseButton) -> String {
     format!("{button:?}").to_lowercase()
 }
 
+/// The key gpui makes of a modifier pressed and released alone; the log shows it as modifiers.
+fn lone_modifier(keystroke: &Keystroke) -> bool {
+    let names = ["shift", "control", "alt", "platform", "function"];
+    !keystroke.modifiers.modified() && names.contains(&keystroke.key.as_str())
+}
+
 impl fmt::Display for Seen {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
@@ -158,7 +164,7 @@ impl RenderOnce for EventLogger {
                         .context_stack
                         .iter()
                         .any(|context| context.get("logger").is_some_and(|logger| *logger == mark));
-                    if inside {
+                    if inside && !lone_modifier(&event.keystroke) {
                         down(Seen::KeyDown(event.keystroke.unparse()), cx)
                     }
                 })