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/extension_api/build.rs

@@ -0,0 +1,15 @@
+fn main() {
+    let version = std::env::var("CARGO_PKG_VERSION").unwrap();
+    let out_dir = std::env::var("OUT_DIR").unwrap();
+
+    let mut parts = version.split(|c: char| !c.is_ascii_digit());
+    let major = parts.next().unwrap().parse::<u16>().unwrap().to_be_bytes();
+    let minor = parts.next().unwrap().parse::<u16>().unwrap().to_be_bytes();
+    let patch = parts.next().unwrap().parse::<u16>().unwrap().to_be_bytes();
+
+    std::fs::write(
+        std::path::Path::new(&out_dir).join("version_bytes"),
+        [major[0], major[1], minor[0], minor[1], patch[0], patch[1]],
+    )
+    .unwrap();
+}