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>

assets/icons/editor_jet_brains.svg

@@ -0,0 +1,3 @@
+<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M3.6725 13.9985C3.36161 13.9982 3.06354 13.8746 2.84371 13.6548C2.62388 13.435 2.50026 13.1369 2.5 12.826V7.494C2.5 6.8325 2.7675 6.185 3.2365 5.7165L6.219 2.736C6.45192 2.50247 6.72867 2.31724 7.03335 2.19094C7.33804 2.06464 7.66467 1.99975 7.9945 2H13.3275C13.6384 2.00027 13.9365 2.12388 14.1563 2.34371C14.3761 2.56354 14.4997 2.86162 14.5 3.1725V8.5045C14.4983 9.17074 14.2336 9.80936 13.7635 10.2815L10.781 13.264C10.5477 13.4976 10.2706 13.6829 9.96561 13.8092C9.66059 13.9355 9.33364 14.0003 9.0035 14V13.9985H3.6725ZM8.157 10.5715H5.243V11.257H8.157V10.5715ZM4.4815 5.257H11.243V12.0165L13.3715 9.888C13.7373 9.52036 13.9433 9.02316 13.9445 8.5045V3.1725C13.9445 2.8335 13.6685 2.5555 13.3275 2.5555H7.9945C7.73753 2.55499 7.483 2.6053 7.24556 2.70356C7.00813 2.80181 6.79246 2.94606 6.611 3.128L4.4815 5.257ZM4.3855 5.353L3.628 6.11C3.26258 6.47809 3.0569 6.97533 3.0555 7.494V12.826C3.0555 13.165 3.3315 13.443 3.6725 13.443H9.0055C9.26249 13.4434 9.51701 13.3929 9.75445 13.2946C9.99188 13.1963 10.2075 13.052 10.389 12.87L11.145 12.1145H4.3855V5.353Z" fill="black"/>
+</svg>