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/array/zipObject.d.mts

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+//#region src/compat/array/zipObject.d.ts
+/**
+ * Combines two arrays, one of property names and one of corresponding values, into a single object.
+ *
+ * @template T - The type of values in the values array
+ * @param props - An array of property names
+ * @param values - An array of values corresponding to the property names
+ * @returns A new object composed of the given property names and values
+ *
+ * @example
+ * const props = ['a', 'b', 'c'];
+ * const values = [1, 2, 3];
+ * zipObject(props, values);
+ * // => { a: 1, b: 2, c: 3 }
+ */
+declare function zipObject<T>(props: ArrayLike<PropertyKey>, values: ArrayLike<T>): Record<string, T>;
+/**
+ * Creates an object from an array of property names, with undefined values.
+ *
+ * @param [props] - An array of property names
+ * @returns A new object with the given property names and undefined values
+ *
+ * @example
+ * const props = ['a', 'b', 'c'];
+ * zipObject(props);
+ * // => { a: undefined, b: undefined, c: undefined }
+ */
+declare function zipObject(props?: ArrayLike<PropertyKey>): Record<string, undefined>;
+//#endregion
+export { zipObject };