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/fp/array/sample.d.mts

@@ -0,0 +1,18 @@
+//#region src/fp/array/sample.d.ts
+/**
+ * Creates a function that returns one random element from an array.
+ *
+ * The returned function follows the main {@link sample} behavior. Use it with {@link pipe}.
+ *
+ * @template T - The type of elements in the array.
+ * @returns A function that maps a readonly array to a random element.
+ *
+ * @example
+ * import { pipe, sample } from 'es-toolkit/fp';
+ *
+ * pipe([1, 2, 3], sample());
+ * // => one of 1, 2, or 3
+ */
+declare function sample<T>(): (array: readonly T[]) => T;
+//#endregion
+export { sample };