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/gpui_web/examples/hello_web/trunk.toml

@@ -0,0 +1,7 @@
+[serve]
+addresses = ["127.0.0.1"]
+port = 8080
+open = true
+
+# Headers required for WebGPU / SharedArrayBuffer support.
+headers = { "Cross-Origin-Embedder-Policy" = "require-corp", "Cross-Origin-Opener-Policy" = "same-origin" }