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/inspector.rs

@@ -3,8 +3,8 @@ use std::fmt;
 use gpui::{
     AbsoluteLength, AnyElement, App, BorderStyle, Bounds, Context, Corners, DefiniteLength,
     DivInspectorState, Edges, FontWeight, Inspector, InteractiveElement, IntoElement, Length,
-    ParentElement, Pixels, StatefulInteractiveElement, StyleRefinement, Styled, TextRun, Window,
-    canvas, div, fill, point, quad, size, transparent_black,
+    ParentElement, Pixels, StatefulInteractiveElement, StyleRefinement, Styled, TextAlign, TextRun,
+    Window, canvas, div, fill, point, quad, size, transparent_black,
 };
 
 use crate::{
@@ -156,7 +156,14 @@ fn paint_layers(bounds: Bounds<Pixels>, layers: Layers, window: &mut Window, cx:
     );
     let radius = theme.radius(Radius::Sm).to_pixels(window.rem_size());
     window.paint_quad(fill(tag, colors.fg).corner_radii(radius));
-    if let Err(error) = line.paint(point(tag.left() + pad, tag.top()), height, window, cx) {
+    if let Err(error) = line.paint(
+        point(tag.left() + pad, tag.top()),
+        height,
+        TextAlign::Left,
+        None,
+        window,
+        cx,
+    ) {
         log::error!("inspector: size tag did not paint: {error:#}");
     }
 }
@@ -380,8 +387,10 @@ fn panel(
 /// Draws gpui's inspector, which debug builds have, in Ely's look. `window.toggle_inspector` opens it at the window's right, and the page gives up its width. Hovering picks the box under the pointer, the wheel steps out to the boxes around it, and a press holds it; the picked box shows its margin, border, padding and size over the page, and its model in the panel.
 pub fn install_inspector(cx: &mut App) {
     cx.set_inspector_renderer(Box::new(panel));
-    cx.register_inspector_element(|_, state: &DivInspectorState, window, cx| {
-        box_model(state, window, cx)
+    cx.register_inspector_element(|_, _| {
+        |_, state: &DivInspectorState, window: &mut Window, cx: &mut App| {
+            box_model(state, window, cx)
+        }
     });
     log::info!("inspector: installed");
 }