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/unzipWith.mjs

@@ -0,0 +1,27 @@
+//#region src/array/unzipWith.ts
+/**
+* Unzips an array of arrays, applying an `iteratee` function to regrouped elements.
+*
+* @template T, R
+* @param target - The nested array to unzip. This is an array of arrays,
+* where each inner array contains elements to be unzipped.
+* @param iteratee - A function to transform the unzipped elements.
+* @returns A new array of unzipped and transformed elements.
+*
+* @example
+* const nestedArray = [[1, 2], [3, 4], [5, 6]];
+* const result = unzipWith(nestedArray, (item, item2, item3) => item + item2 + item3);
+* // result will be [9, 12]
+*/
+function unzipWith(target, iteratee) {
+	const maxLength = Math.max(...target.map((innerArray) => innerArray.length));
+	const result = new Array(maxLength);
+	for (let i = 0; i < maxLength; i++) {
+		const group = new Array(target.length);
+		for (let j = 0; j < target.length; j++) group[j] = target[j][i];
+		result[i] = iteratee(...group);
+	}
+	return result;
+}
+//#endregion
+export { unzipWith };