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/intersectionBy.d.ts

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+//#region src/fp/array/intersectionBy.d.ts
+/**
+ * Creates a function that keeps values whose mapped identity appears in another array.
+ *
+ * The mapper is applied to values from both arrays. The returned function is
+ * lazy-capable inside {@link pipe}.
+ *
+ * @template T - The type of elements in the piped array.
+ * @template U - The type of elements in the configured array.
+ * @param secondArray - Values to intersect with the piped array after mapping.
+ * @param mapper - Maps values from both arrays to comparison keys.
+ * @returns A function that maps the piped array to its mapped intersection.
+ *
+ * @example
+ * import { intersectionBy, pipe } from 'es-toolkit/fp';
+ *
+ * pipe([{ id: 1 }, { id: 2 }], intersectionBy([2], value => typeof value === 'number' ? value : value.id));
+ * // => [{ id: 2 }]
+ */
+declare function intersectionBy<T, U>(secondArray: readonly U[], mapper: (value: T | U) => unknown): (array: readonly T[]) => T[];
+//#endregion
+export { intersectionBy };