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/takeWhile.d.ts

@@ -0,0 +1,21 @@
+//#region src/fp/array/takeWhile.d.ts
+/**
+ * Creates a function that takes leading values while a predicate returns true.
+ *
+ * The returned function is lazy-capable and short-circuiting inside
+ * {@link pipe}; once the predicate returns false, upstream lazy operators stop
+ * processing further input.
+ *
+ * @template T - The type of elements in the array.
+ * @param predicate - Called with each value and index until it returns false.
+ * @returns A function that maps the piped array to the matching prefix.
+ *
+ * @example
+ * import { pipe, takeWhile } from 'es-toolkit/fp';
+ *
+ * pipe([1, 2, 3, 1], takeWhile(value => value < 3));
+ * // => [1, 2]
+ */
+declare function takeWhile<T>(predicate: (element: T, index: number) => boolean): (array: readonly T[]) => T[];
+//#endregion
+export { takeWhile };