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/compat/function/nthArg.js

@@ -0,0 +1,28 @@
+const require_toInteger = require("../util/toInteger.js");
+//#region src/compat/function/nthArg.ts
+/**
+* Creates a function that retrieves the argument at the specified index `n`.
+*
+* If `n` is negative, the nth argument from the end is returned.
+*
+* @param [n=0] - The index of the argument to retrieve.
+*   If negative, counts from the end of the arguments list.
+* @returns A new function that returns the argument at the specified index.
+*
+* @example
+* const getSecondArg = nthArg(1);
+* const result = getSecondArg('a', 'b', 'c');
+* console.log(result); // => 'b'
+*
+* @example
+* const getLastArg = nthArg(-1);
+* const result = getLastArg('a', 'b', 'c');
+* console.log(result); // => 'c'
+*/
+function nthArg(n = 0) {
+	return function(...args) {
+		return args.at(require_toInteger.toInteger(n));
+	};
+}
+//#endregion
+exports.nthArg = nthArg;