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>

crates/zed_env_vars/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "zed_env_vars"
+version = "0.1.0"
+edition.workspace = true
+publish.workspace = true
+license = "GPL-3.0-or-later"
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/zed_env_vars.rs"
+
+[features]
+default = []
+
+[dependencies]
+env_var.workspace = true

crates/zed_env_vars/LICENSE-GPL

@@ -0,0 +1 @@
+../../LICENSE-GPL

crates/zed_env_vars/src/zed_env_vars.rs

@@ -0,0 +1,6 @@
+pub use env_var::{EnvVar, bool_env_var, env_var};
+use std::sync::LazyLock;
+
+/// Whether Zed is running in stateless mode.
+/// When true, Zed will use in-memory databases instead of persistent storage.
+pub static ZED_STATELESS: LazyLock<bool> = bool_env_var!("ZED_STATELESS");