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>

crates/client/Cargo.toml

@@ -0,0 +1,89 @@
+[package]
+name = "client"
+version = "0.1.0"
+edition.workspace = true
+publish.workspace = true
+license = "GPL-3.0-or-later"
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/client.rs"
+doctest = false
+
+[features]
+test-support = ["clock/test-support", "collections/test-support", "gpui/test-support", "rpc/test-support"]
+
+[dependencies]
+anyhow.workspace = true
+async-channel.workspace = true
+async-tungstenite = { workspace = true, features = ["tokio", "tokio-rustls-manual-roots"] }
+base64.workspace = true
+chrono = { workspace = true, features = ["serde"] }
+clock.workspace = true
+cloud_api_client.workspace = true
+cloud_api_types.workspace = true
+cloud_llm_client.workspace = true
+collections.workspace = true
+credentials_provider.workspace = true
+db.workspace = true
+derive_more.workspace = true
+feature_flags.workspace = true
+fs.workspace = true
+futures.workspace = true
+gpui.workspace = true
+gpui_tokio.workspace = true
+http_client.workspace = true
+http_client_tls.workspace = true
+httparse = "1.10"
+log.workspace = true
+parking_lot.workspace = true
+paths.workspace = true
+postage.workspace = true
+rand.workspace = true
+regex.workspace = true
+release_channel.workspace = true
+rpc = { workspace = true, features = ["gpui"] }
+serde.workspace = true
+serde_json.workspace = true
+serde_urlencoded.workspace = true
+settings.workspace = true
+sha2.workspace = true
+smol.workspace = true
+telemetry.workspace = true
+telemetry_events.workspace = true
+text.workspace = true
+thiserror.workspace = true
+time.workspace = true
+tiny_http.workspace = true
+tokio-socks.workspace = true
+tokio.workspace = true
+url.workspace = true
+util.workspace = true
+worktree.workspace = true
+zed_credentials_provider.workspace = true
+
+[dev-dependencies]
+clock = { workspace = true, features = ["test-support"] }
+collections = { workspace = true, features = ["test-support"] }
+fs.workspace = true
+gpui = { workspace = true, features = ["test-support"] }
+http_client = { workspace = true, features = ["test-support"] }
+rpc = { workspace = true, features = ["test-support"] }
+settings = { workspace = true, features = ["test-support"] }
+util = { workspace = true, features = ["test-support"] }
+
+[target.'cfg(target_os = "windows")'.dependencies]
+semver.workspace = true
+windows.workspace = true
+
+[target.'cfg(target_os = "macos")'.dependencies]
+objc2-foundation.workspace = true
+
+[target.'cfg(any(target_os = "windows", target_os = "macos"))'.dependencies]
+tokio-native-tls = "0.3"
+
+[target.'cfg(not(any(target_os = "windows", target_os = "macos")))'.dependencies]
+rustls-pki-types = "1.12"
+tokio-rustls = { version = "0.26", features = ["tls12", "ring"], default-features = false }