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/math/rangeRight.js

@@ -0,0 +1,31 @@
+//#region src/math/rangeRight.ts
+/**
+* Returns an array of numbers from `end` (exclusive) to `start` (inclusive), decrementing by `step`.
+*
+* @param start - The starting number of the range (inclusive).
+* @param end - The end number of the range (exclusive).
+* @param step - The step value for the range.
+* @returns An array of numbers from `end` (exclusive) to `start` (inclusive) with the specified `step`.
+* @throws {Error} Throws an error if the step value is not a non-zero integer.
+*
+* @example
+* // Returns [3, 2, 1, 0]
+* rangeRight(4);
+*
+* @example
+* // Returns [-3, -2, -1, 0]
+* rangeRight(0, -4, -1);
+*/
+function rangeRight(start, end, step = 1) {
+	if (end == null) {
+		end = start;
+		start = 0;
+	}
+	if (!Number.isInteger(step) || step === 0) throw new Error(`The step value must be a non-zero integer.`);
+	const length = Math.max(Math.ceil((end - start) / step), 0);
+	const result = new Array(length);
+	for (let i = 0; i < length; i++) result[i] = start + (length - i - 1) * step;
+	return result;
+}
+//#endregion
+exports.rangeRight = rangeRight;