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/compat/object/create.d.mts

@@ -0,0 +1,17 @@
+//#region src/compat/object/create.d.ts
+/**
+ * Creates an object that inherits from the prototype object.
+ *
+ * If `properties` are provided, they will be added to the new object.
+ * Only string-keyed enumerable properties directly owned by the `properties` object are copied.
+ * Inherited properties or those with `Symbol` keys are not copied.
+ *
+ * @template T - The prototype object type.
+ * @template U - The properties object type.
+ * @param prototype - The object to inherit from.
+ * @param properties - The properties to assign to the created object.
+ * @returns The new object.
+ */
+declare function create<T extends object, U extends object>(prototype: T, properties?: U): T & U;
+//#endregion
+export { create };