improvement: some new gadgets added to dashboard. some new functionality added to existed gadgets.

frontend/src/components/staff/staffRowHighlight.ts

@@ -0,0 +1,20 @@
+export const STAFF_ROW_HIGHLIGHT_CLASS =
+  'relative bg-primary/10 ring-2 ring-inset ring-primary/50 shadow-[0_0_16px_rgba(99,102,241,0.2)]';
+
+export function parseHighlightMembershipIds(searchParams: URLSearchParams): Set<string> {
+  const raw = searchParams.get('highlightMembershipIds');
+  if (!raw) return new Set();
+  return new Set(
+    raw
+      .split(',')
+      .map((id) => id.trim())
+      .filter(Boolean),
+  );
+}
+
+export function isStaffRowHighlighted(
+  membershipId: string,
+  highlightIds: Set<string>,
+): boolean {
+  return highlightIds.has(membershipId);
+}