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/function/rest.mjs

@@ -0,0 +1,41 @@
+//#region src/function/rest.ts
+/**
+* Creates a function that transforms the arguments of the provided function `func`.
+* The transformed arguments are passed to `func` such that the arguments starting from a specified index
+* are grouped into an array, while the previous arguments are passed as individual elements.
+*
+* @template F - The type of the function being transformed.
+* @param func - The function whose arguments are to be transformed.
+* @param [startIndex=func.length - 1] - The index from which to start grouping the remaining arguments into an array.
+*                                            Defaults to `func.length - 1`, grouping all arguments after the last parameter.
+* @returns A new function that, when called, returns the result of calling `func` with the transformed arguments.
+*
+* The transformed arguments are:
+* - The first `start` arguments as individual elements.
+* - The remaining arguments from index `start` onward grouped into an array.
+* @example
+* function fn(a, b, c) {
+*   return [a, b, c];
+* }
+*
+* // Using default start index (func.length - 1, which is 2 in this case)
+* const transformedFn = rest(fn);
+* console.log(transformedFn(1, 2, 3, 4)); // [1, 2, [3, 4]]
+*
+* // Using start index 1
+* const transformedFnWithStart = rest(fn, 1);
+* console.log(transformedFnWithStart(1, 2, 3, 4)); // [1, [2, 3, 4]]
+*
+* // With fewer arguments than the start index
+* console.log(transformedFn(1)); // [1, undefined, []]
+*/
+function rest(func, startIndex = func.length - 1) {
+	return function(...args) {
+		const rest = args.slice(startIndex);
+		const params = args.slice(0, startIndex);
+		while (params.length < startIndex) params.push(void 0);
+		return func.apply(this, [...params, rest]);
+	};
+}
+//#endregion
+export { rest };