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/spread.mjs

@@ -0,0 +1,24 @@
+//#region src/function/spread.ts
+/**
+* Creates a new function that spreads elements of an array argument into individual arguments
+* for the original function.
+*
+* @template F - A function type with any number of parameters and any return type.
+* @param func - The function to be transformed. It can be any function with any number of arguments.
+* @returns A new function that takes an array of arguments and returns the result of calling the original function with those arguments.
+*
+* @example
+* function add(a, b) {
+*   return a + b;
+* }
+*
+* const spreadAdd = spread(add);
+* console.log(spreadAdd([1, 2])); // Output: 3
+*/
+function spread(func) {
+	return function(argsArr) {
+		return func.apply(this, argsArr);
+	};
+}
+//#endregion
+export { spread };