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/sample.js

@@ -0,0 +1,20 @@
+//#region src/array/sample.ts
+/**
+* Returns a random element from an array.
+*
+* This function takes an array and returns a single element selected randomly from the array.
+*
+* @template T - The type of elements in the array.
+* @param arr - The array to sample from.
+* @returns A random element from the array.
+*
+* @example
+* const array = [1, 2, 3, 4, 5];
+* const randomElement = sample(array);
+* // randomElement will be one of the elements from the array, selected randomly.
+*/
+function sample(arr) {
+	return arr[Math.floor(Math.random() * arr.length)];
+}
+//#endregion
+exports.sample = sample;