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/after.mjs

@@ -0,0 +1,32 @@
+import { toInteger } from "../util/toInteger.mjs";
+//#region src/compat/function/after.ts
+/**
+* The opposite of `_.before`; this method creates a function that invokes
+* `func` once it's called `n` or more times.
+*
+* @template TFunc - The type of the function to be invoked.
+* @param n - The number of calls before `func` is invoked.
+* @param func - The function to restrict.
+* @returns Returns the new restricted function.
+* @throws {TypeError} - If `func` is not a function.
+*
+* @example
+* const saves = ['profile', 'settings'];
+* const done = after(saves.length, () => {
+*   console.log('done saving!');
+* });
+*
+* saves.forEach(type => {
+*   asyncSave({ 'type': type, 'complete': done });
+* });
+* // => Logs 'done saving!' after the two async saves have completed.
+*/
+function after(n, func) {
+	if (typeof func !== "function") throw new TypeError("Expected a function");
+	n = toInteger(n);
+	return function(...args) {
+		if (--n < 1) return func.apply(this, args);
+	};
+}
+//#endregion
+export { after };