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/clear-target-dir-if-larger-than

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+
+set -euxo pipefail
+
+if [[ $# -lt 1 || $# -gt 2 ]]; then
+    echo "usage: $0 <MAX_SIZE_IN_GB> [SMALL_CLEAN_SIZE_IN_GB]"
+    exit 1
+fi
+
+if ! [[ -d target ]]; then
+    echo "target directory does not exist yet"
+    exit 0
+fi
+
+max_size_gb=$1
+small_clean_size_gb=${2:-}
+
+if [[ -n "${small_clean_size_gb}" && ${small_clean_size_gb} -ge ${max_size_gb} ]]; then
+    echo "error: small clean threshold (${small_clean_size_gb}gb) must be smaller than max size (${max_size_gb}gb)"
+    exit 1
+fi
+
+current_size=$(du -s target | cut -f1)
+current_size_gb=$(( ${current_size} / 1024 / 1024 ))
+
+echo "target directory size: ${current_size_gb}gb. max size: ${max_size_gb}gb"
+
+if [[ ${current_size_gb} -gt ${max_size_gb} ]]; then
+    echo "clearing target directory"
+    shopt -s dotglob
+    rm -rf target/*
+elif [[ -n "${small_clean_size_gb}" && ${current_size_gb} -gt ${small_clean_size_gb} ]]; then
+    echo "running cargo clean --workspace (size above small clean threshold of ${small_clean_size_gb}gb)"
+    cargo clean --workspace
+fi