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/.cargo/config.toml

@@ -0,0 +1,14 @@
+[target.wasm32-unknown-unknown]
+rustflags = [
+    "-C", "target-feature=+atomics,+bulk-memory,+mutable-globals",
+    "-C", "link-arg=--shared-memory",
+    "-C", "link-arg=--max-memory=1073741824",
+    "-C", "link-arg=--import-memory",
+    "-C", "link-arg=--export=__wasm_init_tls",
+    "-C", "link-arg=--export=__tls_size",
+    "-C", "link-arg=--export=__tls_align",
+    "-C", "link-arg=--export=__tls_base",
+]
+
+[unstable]
+build-std = ["std,panic_abort"]