Fix domain normalization for uppercase WWW prefix

Author: cursoragent

skills/domain-firewall/SKILL.md

@@ -180,7 +180,7 @@ Copy this into your project. The file exports all types, built-in policies, and
 
 ```typescript
 function normalizeDomain(hostname: string): string {
-  return hostname.replace(/^www\./, "").toLowerCase();
+  return hostname.toLowerCase().replace(/^www\./, "");
 }
 
 function ts(): string {

skills/domain-firewall/scripts/domain-firewall.mjs

@@ -95,7 +95,7 @@ Environment:
 // =============================================================================
 
 function normalizeDomain(hostname) {
-  return hostname.replace(/^www\./, "").toLowerCase();
+  return hostname.toLowerCase().replace(/^www\./, "");
 }
 
 function ts() {