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/shellcheck-scripts

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+mode=${1:-error}
+[[ "$mode" =~ ^(error|warning)$ ]] || { echo "Usage: $0 [error|warning]"; exit 1; }
+
+cd "$(dirname "$0")/.." || exit 1
+
+find script -maxdepth 1 -type f -print0 |
+  xargs -0 grep -l -E '^#!(/bin/|/usr/bin/env )(sh|bash|dash)' |
+  xargs -r shellcheck -x -S "$mode" -C