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-toolkit/dist/object/mapValues.d.ts

@@ -0,0 +1,22 @@
+//#region src/object/mapValues.d.ts
+/**
+ * Creates a new object with the same keys as the given object, but with values generated
+ * by running each own enumerable property of the object through the iteratee function.
+ *
+ * @template T - The type of the object.
+ * @template K - The type of the keys in the object.
+ * @template V - The type of the new values generated by the iteratee function.
+ *
+ * @param object - The object to iterate over.
+ * @param getNewValue - The function invoked per own enumerable property.
+ * @returns Returns the new mapped object.
+ *
+ * @example
+ * // Example usage:
+ * const obj = { a: 1, b: 2 };
+ * const result = mapValues(obj, (value) => value * 2);
+ * console.log(result); // { a: 2, b: 4 }
+ */
+declare function mapValues<T extends object, K extends keyof T, V>(object: T, getNewValue: (value: T[K], key: K, object: T) => V): Record<K, V>;
+//#endregion
+export { mapValues };