fix(ui): prevent modal overlays from inheriting margin-top from parent space-y containers

frontend/src/features/triage/TriageDeck.tsx

@@ -811,7 +811,7 @@ export const TriageDeck: React.FC<TriageDeckProps> = ({
       {/* LONG-PRESS / MORE OPTIONS ACTION SHEET (For Triage Card & Queue Items) */}
       {actionSheetCard && (
         <div
-          className="fixed inset-0 z-50 flex items-end sm:items-center justify-center bg-black/60 backdrop-blur-xs p-0 sm:p-4 animate-in fade-in duration-150"
+          className="fixed inset-0 !m-0 modal-overlay z-50 flex items-end sm:items-center justify-center bg-black/60 backdrop-blur-xs p-0 sm:p-4 animate-in fade-in duration-150"
           onClick={() => setActionSheetCard(null)}
         >
           <div