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/compat/array/intersection.js

@@ -0,0 +1,34 @@
+const require_intersection = require("../../array/intersection.js");
+const require_uniq = require("../../array/uniq.js");
+const require_isArrayLikeObject = require("../predicate/isArrayLikeObject.js");
+//#region src/compat/array/intersection.ts
+/**
+* Returns the intersection of multiple arrays.
+*
+* This function takes multiple arrays and returns a new array containing the elements that are
+* present in all provided arrays. It effectively filters out any elements that are not found
+* in every array.
+*
+* @template T - The type of elements in the arrays.
+* @param arrays - The arrays to compare.
+* @returns A new array containing the elements that are present in all arrays.
+*
+* @example
+* const array1 = [1, 2, 3, 4, 5];
+* const array2 = [3, 4, 5, 6, 7];
+* const result = intersection(array1, array2);
+* // result will be [3, 4, 5] since these elements are in both arrays.
+*/
+function intersection(...arrays) {
+	if (arrays.length === 0) return [];
+	if (!require_isArrayLikeObject.isArrayLikeObject(arrays[0])) return [];
+	let result = require_uniq.uniq(Array.from(arrays[0]));
+	for (let i = 1; i < arrays.length; i++) {
+		const array = arrays[i];
+		if (!require_isArrayLikeObject.isArrayLikeObject(array)) return [];
+		result = require_intersection.intersection(result, Array.from(array));
+	}
+	return result;
+}
+//#endregion
+exports.intersection = intersection;