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/shuffle.d.ts

@@ -0,0 +1,19 @@
+//#region src/fp/array/shuffle.d.ts
+/**
+ * Creates a function that returns a shuffled copy of an array.
+ *
+ * The returned function uses the main {@link shuffle} implementation and does not mutate
+ * the input array. Use it with {@link pipe}.
+ *
+ * @template T - The type of elements in the array.
+ * @returns A function that maps a readonly array to a shuffled copy.
+ *
+ * @example
+ * import { pipe, shuffle } from 'es-toolkit/fp';
+ *
+ * pipe([1, 2, 3], shuffle());
+ * // => the same values in random order
+ */
+declare function shuffle<T>(): (array: readonly T[]) => T[];
+//#endregion
+export { shuffle };