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>

script/determine-release-channel

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+if [ -z "${GITHUB_ACTIONS-}" ]; then
+    echo "Error: This script must be run in a GitHub Actions environment"
+    exit 1
+elif [ -z "${GITHUB_REF-}" ]; then
+    # This should be the release tag 'v0.x.x'
+    echo "Error: GITHUB_REF is not set"
+    exit 1
+fi
+
+version=$(script/get-crate-version zed)
+channel=$(cat crates/zed/RELEASE_CHANNEL)
+echo "Publishing version: ${version} on release channel ${channel}"
+echo "RELEASE_CHANNEL=${channel}" >> $GITHUB_ENV
+echo "RELEASE_VERSION=${version}" >> $GITHUB_ENV
+
+expected_tag_name=""
+case ${channel} in
+stable)
+    expected_tag_name="v${version}";;
+preview)
+    expected_tag_name="v${version}-pre";;
+*)
+    echo "can't publish a release on channel ${channel}"
+    exit 1;;
+esac
+if [[ $GITHUB_REF_NAME != $expected_tag_name ]]; then
+    echo "invalid release tag ${GITHUB_REF_NAME}. expected ${expected_tag_name}"
+    exit 1
+fi