feat: mask email util

web/src/util/maskEmail.ts

@@ -0,0 +1,22 @@
+export default function maskEmail(email: string): string {
+  // Validate email (very basic)
+  if (!email.includes("@")) return email;
+
+  const [user, domain] = email.split("@");
+  const [domainName, ...tldParts] = domain.split(".");
+
+  // Mask user part
+  const maskedUser =
+    user.length > 2 ? `${user[0]}***${user[user.length - 1]}` : `${user[0]}***`;
+
+  // Mask domain part (except TLD)
+  const maskedDomain =
+    domainName.length > 2
+      ? `${domainName[0]}***${domainName[domainName.length - 1]}`
+      : `${domainName[0]}***`;
+
+  // Join TLD
+  const tld = tldParts.length ? "." + tldParts.join(".") : "";
+
+  return `${maskedUser}@${maskedDomain}${tld}`;
+}