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/fill.js

@@ -0,0 +1,38 @@
+//#region src/array/fill.ts
+/**
+* Fills elements of an array with a specified value from the start position up to, but not including, the end position.
+*
+* This function mutates the original array and replaces its elements with the provided value, starting from the specified
+* start index up to the end index (non-inclusive). If the start or end indices are not provided, it defaults to filling the
+* entire array.
+*
+* @template T - The type of elements in the original array.
+* @template U - The type of the value to fill the array with.
+* @param array - The array to fill.
+* @param value - The value to fill the array with.
+* @param [start=0] - The start position. Defaults to 0.
+* @param [end=arr.length] - The end position. Defaults to the array's length.
+* @returns The array with the filled values.
+*
+* @example
+* fill([1, 2, 3], 'a');
+* // => ['a', 'a', 'a']
+*
+* fill(Array(3), 2);
+* // => [2, 2, 2]
+*
+* fill([4, 6, 8, 10], '*', 1, 3);
+* // => [4, '*', '*', 10]
+*
+* fill([1, 2, 3], '*', -2, -1);
+* // => [1, '*', 3]
+*/
+function fill(array, value, start = 0, end = array.length) {
+	const length = array.length;
+	const finalStart = Math.max(start >= 0 ? start : length + start, 0);
+	const finalEnd = Math.min(end >= 0 ? end : length + end, length);
+	for (let i = finalStart; i < finalEnd; i++) array[i] = value;
+	return array;
+}
+//#endregion
+exports.fill = fill;