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>

script/metal-debug

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+export GPUTOOLS_LOAD_GTMTLCAPTURE=1
+export DYLD_LIBRARY_PATH="/usr/lib/system/introspection"
+export METAL_LOAD_INTERPOSER=1
+export DYLD_INSERT_LIBRARIES="/usr/lib/libMTLCapture.dylib"
+export DYMTL_TOOLS_DYLIB_PATH="/usr/lib/libMTLCapture.dylib"
+export METAL_DEVICE_WRAPPER_TYPE=1
+export GPUProfilerEnabled="YES"
+export METAL_DEBUG_ERROR_MODE=0
+export LD_LIBRARY_PATH="/Applications/Xcode.app/Contents/Developer/../SharedFrameworks/"
+
+cargo run "$@"