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>

.github/workflows/cherry_pick.yml

@@ -0,0 +1,54 @@
+# Generated from xtask::workflows::cherry_pick
+# Rebuild with `cargo xtask workflows`.
+name: cherry_pick
+run-name: 'cherry_pick to ${{ inputs.channel }} #${{ inputs.pr_number }}'
+on:
+  workflow_dispatch:
+    inputs:
+      commit:
+        description: commit
+        required: true
+        type: string
+      branch:
+        description: branch
+        required: true
+        type: string
+      channel:
+        description: channel
+        required: true
+        type: string
+      pr_number:
+        description: pr_number
+        required: true
+        type: string
+jobs:
+  run_cherry_pick:
+    runs-on: namespace-profile-2x4-ubuntu-2404
+    steps:
+    - name: steps::checkout_repo
+      uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd
+      with:
+        clean: false
+    - id: generate-token
+      name: steps::authenticate_as_zippy
+      uses: actions/create-github-app-token@f8d387b68d61c58ab83c6c016672934102569859
+      with:
+        app-id: ${{ secrets.ZED_ZIPPY_APP_ID }}
+        private-key: ${{ secrets.ZED_ZIPPY_APP_PRIVATE_KEY }}
+        permission-contents: write
+        permission-workflows: write
+        permission-pull-requests: write
+    - name: cherry_pick::run_cherry_pick::cherry_pick
+      run: ./script/cherry-pick "$BRANCH" "$COMMIT" "$CHANNEL"
+      env:
+        BRANCH: ${{ inputs.branch }}
+        COMMIT: ${{ inputs.commit }}
+        CHANNEL: ${{ inputs.channel }}
+        GIT_AUTHOR_NAME: zed-zippy[bot]
+        GIT_AUTHOR_EMAIL: <234243425+zed-zippy[bot]@users.noreply.github.com>
+        GIT_COMMITTER_NAME: zed-zippy[bot]
+        GIT_COMMITTER_EMAIL: <234243425+zed-zippy[bot]@users.noreply.github.com>
+        GITHUB_TOKEN: ${{ steps.generate-token.outputs.token }}
+defaults:
+  run:
+    shell: bash -euxo pipefail {0}