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/difference.js

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+const require_difference = require("../../array/difference.js");
+const require_lazy = require("../_internal/lazy.js");
+//#region src/fp/array/difference.ts
+/**
+* Creates a function that returns values from the piped array that are not present in another array.
+*
+* Equality follows SameValueZero through Set membership, matching the main
+* {@link difference} implementation. The returned function is lazy-capable
+* inside {@link pipe}.
+*
+* @template T - The type of elements in the arrays.
+* @param secondArray - Values to exclude from the piped array.
+* @returns A function that maps the piped array to its difference.
+*
+* @example
+* import { difference, pipe } from 'es-toolkit/fp';
+*
+* pipe([1, 2, 3], difference([2, 4]));
+* // => [1, 3]
+*/
+function difference(secondArray) {
+	const secondSet = new Set(secondArray);
+	function differenceEager(array) {
+		return require_difference.difference(array, secondArray);
+	}
+	const differenceLazy = require_lazy.createLazyFunction((value, _index, emit) => {
+		if (!secondSet.has(value)) emit(value);
+	});
+	return require_lazy.combineEagerAndLazyFunctions(differenceEager, differenceLazy);
+}
+//#endregion
+exports.difference = difference;