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/tail.d.mts

@@ -0,0 +1,19 @@
+//#region src/fp/array/tail.d.ts
+/**
+ * Creates a function that returns every element except the first one.
+ *
+ * Empty and single-element arrays return an empty array, matching the main {@link tail}
+ * behavior. Use the returned function with {@link pipe}.
+ *
+ * @template T - The type of elements in the array.
+ * @returns A function that maps a readonly array to its tail elements.
+ *
+ * @example
+ * import { pipe, tail } from 'es-toolkit/fp';
+ *
+ * pipe([1, 2, 3], tail());
+ * // => [2, 3]
+ */
+declare function tail<T>(): (array: readonly T[]) => T[];
+//#endregion
+export { tail };