Add settings page for managing forecasting API key and URL via UI

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/node_modules/es-abstract/2024/HasEitherUnicodeFlag.js

@@ -0,0 +1,18 @@
+'use strict';
+
+var $TypeError = require('es-errors/type');
+
+var isRegExpRecord = require('../helpers/records/regexp-record');
+
+// https://262.ecma-international.org/15.0/#sec-runtime-semantics-haseitherunicodeflag-abstract-operation
+
+module.exports = function HasEitherUnicodeFlag(rer) {
+	if (!isRegExpRecord(rer)) {
+		throw new $TypeError('Assertion failed: `rer` must be a RegExp Record');
+	}
+
+	if (rer['[[Unicode]]'] || rer['[[UnicodeSets]]']) { // step 1
+		return true; // step 1.a
+	}
+	return false; // step 2
+};