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/shuffle.js

@@ -0,0 +1,28 @@
+//#region src/array/shuffle.ts
+/**
+* Randomizes the order of elements in an array using the Fisher-Yates algorithm.
+*
+* This function takes an array and returns a new array with its elements shuffled in a random order.
+*
+* @template T - The type of elements in the array.
+* @param arr - The array to shuffle.
+* @returns A new array with its elements shuffled in random order.
+*
+* @example
+* const array = [1, 2, 3, 4, 5];
+* const shuffledArray = shuffle(array);
+* // shuffledArray will be a new array with elements of array in random order, e.g., [3, 1, 4, 5, 2]
+*/
+function shuffle(arr) {
+	const result = arr.slice();
+	/**
+	* https://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle#The_modern_algorithm
+	*/
+	for (let i = result.length - 1; i >= 1; i--) {
+		const j = Math.floor(Math.random() * (i + 1));
+		[result[i], result[j]] = [result[j], result[i]];
+	}
+	return result;
+}
+//#endregion
+exports.shuffle = shuffle;