Refaktor: Nálezy SonarQube

client/src/components/Header.tsx

@@ -78,7 +78,7 @@ export default function Header() {
                     cislo = cislo.padStart(16, '0');
                 }
                 let sum = 0;
-                for (var i = 0; i < cislo.length; i++) {
+                for (let i = 0; i < cislo.length; i++) {
                     const char = cislo.charAt(i);
                     const order = (cislo.length - 1) - i;
                     const weight = (2 ** order) % 11;