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/array/xorBy.js

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+const require_differenceBy = require("./differenceBy.js");
+const require_intersectionBy = require("./intersectionBy.js");
+const require_unionBy = require("./unionBy.js");
+//#region src/array/xorBy.ts
+/**
+* Computes the symmetric difference between two arrays using a custom mapping function.
+* The symmetric difference is the set of elements which are in either of the arrays,
+* but not in their intersection, determined by the result of the mapping function.
+*
+* @template T - Type of elements in the input arrays.
+* @template U - Type of the values returned by the mapping function.
+*
+* @param arr1 - The first array.
+* @param arr2 - The second array.
+* @param mapper - The function to map array elements to comparison values.
+* @returns An array containing the elements that are present in either `arr1` or `arr2` but not in both, based on the values returned by the mapping function.
+*
+* @example
+* // Custom mapping function for objects with an 'id' property
+* const idMapper = obj => obj.id;
+* xorBy([{ id: 1 }, { id: 2 }], [{ id: 2 }, { id: 3 }], idMapper);
+* // Returns [{ id: 1 }, { id: 3 }]
+*/
+function xorBy(arr1, arr2, mapper) {
+	const union = require_unionBy.unionBy(arr1, arr2, mapper);
+	const intersection = require_intersectionBy.intersectionBy(arr1, arr2, mapper);
+	return require_differenceBy.differenceBy(union, intersection, mapper);
+}
+//#endregion
+exports.xorBy = xorBy;