WebUI: prefer for loop over Array.forEach method

The `for` loop can do everything `forEach` can and doesn't need a closure.

src/webui/www/eslint.config.mjs

@@ -70,6 +70,7 @@ export default [
             "Stylistic/quote-props": ["error", "consistent-as-needed"],
             "Stylistic/semi": "error",
             "Stylistic/spaced-comment": ["error", "always", { exceptions: ["*"] }],
+            "Unicorn/no-array-for-each": "error",
             "Unicorn/no-zero-fractions": "error",
             "Unicorn/prefer-number-properties": "error",
             "Unicorn/switch-case-braces": ["error", "avoid"]