logiguard fork: GPUI xdg-activation keyboard-focus serial fix

Single-commit orphan branch: full zed-industries/zed @ 8c74db0 source tree
with a 3-file patch applied (no upstream history).

Patch (crates/gpui_linux/src/linux/wayland/):
  - serial.rs: add SerialKind::KeyboardEnter
  - client.rs: store wl_keyboard.enter serial; add latest_serial_of()
  - window.rs: activate() uses keyboard-enter serial (Mutter focus gate)

Mutter honors window activation only when the token carries the keyboard-
focus serial from wl_keyboard.enter; GPUI used a stale mouse-press serial.
See docs/tray-window-focus-wayland.md in logiguard.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

crates/ui/src/traits/animation_ext.rs

@@ -0,0 +1,42 @@
+use std::time::Duration;
+
+use gpui::{Animation, AnimationElement, AnimationExt, Transformation, percentage};
+
+use crate::{prelude::*, traits::transformable::Transformable};
+
+/// An extension trait for adding common animations to animatable components.
+pub trait CommonAnimationExt: AnimationExt {
+    /// Render this component as rotating over the given duration.
+    ///
+    /// NOTE: This method uses the location of the caller to generate an ID for this state.
+    ///       If this is not sufficient to identify your state (e.g. you're rendering a list item),
+    ///       you can provide a custom ElementID using the `use_keyed_rotate_animation` method.
+    #[track_caller]
+    fn with_rotate_animation(self, duration: u64) -> AnimationElement<Self>
+    where
+        Self: Transformable + Sized,
+    {
+        self.with_keyed_rotate_animation(
+            ElementId::CodeLocation(*std::panic::Location::caller()),
+            duration,
+        )
+    }
+
+    /// Render this component as rotating with the given element ID over the given duration.
+    fn with_keyed_rotate_animation(
+        self,
+        id: impl Into<ElementId>,
+        duration: u64,
+    ) -> AnimationElement<Self>
+    where
+        Self: Transformable + Sized,
+    {
+        self.with_animation(
+            id,
+            Animation::new(Duration::from_secs(duration)).repeat(),
+            |component, delta| component.transform(Transformation::rotate(percentage(delta))),
+        )
+    }
+}
+
+impl<T: AnimationExt> CommonAnimationExt for T {}