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/flatpak/bundle-flatpak

@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+cd "$(dirname "$0")/../.."
+shopt -s extglob
+
+script/bundle-linux --flatpak
+archive_match="zed(-[a-zA-Z0-9]+)?-linux-$(uname -m)\.tar\.gz"
+archive=$(ls "target/release" | grep -E ${archive_match})
+channel=$(<crates/zed/RELEASE_CHANNEL)
+
+export CHANNEL="$channel"
+export ARCHIVE="$archive"
+if [[ "$channel" == "dev" ]]; then
+    export APP_ID="dev.zed.ZedDev"
+    export APP_NAME="Zed Devel"
+    export BRANDING_LIGHT="#99c1f1"
+    export BRANDING_DARK="#1a5fb4"
+    export ICON_FILE="app-icon-dev"
+elif [[ "$channel" == "nightly" ]]; then
+    export APP_ID="dev.zed.ZedNightly"
+    export APP_NAME="Zed Nightly"
+    export BRANDING_LIGHT="#e9aa6a"
+    export BRANDING_DARK="#1a5fb4"
+    export ICON_FILE="app-icon-nightly"
+elif [[ "$channel" == "preview" ]]; then
+    export APP_ID="dev.zed.ZedPreview"
+    export APP_NAME="Zed Preview"
+    export BRANDING_LIGHT="#99c1f1"
+    export BRANDING_DARK="#1a5fb4"
+    export ICON_FILE="app-icon-preview"
+elif [[ "$channel" == "stable" ]]; then
+    export APP_ID="dev.zed.Zed"
+    export APP_NAME="Zed"
+    export BRANDING_LIGHT="#99c1f1"
+    export BRANDING_DARK="#1a5fb4"
+    export ICON_FILE="app-icon"
+else
+    echo "Invalid channel: '$channel'"
+    exit
+fi
+
+envsubst < "crates/zed/resources/flatpak/manifest-template.json" > "$APP_ID.json"
+flatpak-builder --user --install --force-clean build "$APP_ID.json"
+flatpak build-bundle ~/.local/share/flatpak/repo "target/release/$APP_ID.flatpak" "$APP_ID"
+echo "Created 'target/release/$APP_ID.flatpak'"