logiguard fork v2: patched GPUI on verified 8c74db0 tree

Rebuilt from the exact zed-industries/zed @ 8c74db00c4053d6c0a9037863d7bd048658da4ca
tree (previous orphan was based on a stale/wrong fetch). Same 3-file patch:
  - 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)

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

script/check-keymaps

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+pattern='cmd-'
+result=$(git grep --no-color --line-number --fixed-strings -e "$pattern" -- \
+  'assets/keymaps/' \
+  ':(exclude)assets/keymaps/storybook.json' \
+  ':(exclude)assets/keymaps/default-macos.json' \
+  ':(exclude)assets/keymaps/macos/*.json' || true)
+
+if [[ -n "${result}" ]]; then
+  echo "${result}"
+  echo "Error: Found 'cmd-' in non-macOS keymap files."
+  exit 1
+fi
+
+pattern='super-|win-|fn-'
+result=$(git grep --no-color --line-number --fixed-strings -e "$pattern" -- \
+  'assets/keymaps/' || true)
+
+if [[ -n "${result}" ]]; then
+  echo "${result}"
+  echo "Error: Found 'super-', 'win-', or 'fn-' in keymap files. Currently these aren't used."
+  exit 1
+fi