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/2021/thisTimeValue.js

@@ -0,0 +1,9 @@
+'use strict';
+
+var timeValue = require('../helpers/timeValue');
+
+// https://262.ecma-international.org/6.0/#sec-properties-of-the-date-prototype-object
+
+module.exports = function thisTimeValue(value) {
+	return timeValue(value);
+};