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/memoize.js

@@ -0,0 +1,28 @@
+//#region src/compat/function/memoize.ts
+/**
+* Creates a function that memoizes the result of func. If resolver is provided it determines the cache key for
+* storing the result based on the arguments provided to the memoized function. By default, the first argument
+* provided to the memoized function is coerced to a string and used as the cache key. The func is invoked with
+* the this binding of the memoized function.
+*
+* @template T - The type of the original function being memoized
+* @param func The function to have its output memoized.
+* @param [resolver] The function to resolve the cache key.
+* @return {MemoizedFunction<T>} Returns the new memoizing function.
+*/
+function memoize(func, resolver) {
+	if (typeof func !== "function" || resolver != null && typeof resolver !== "function") throw new TypeError("Expected a function");
+	const memoized = function(...args) {
+		const key = resolver ? resolver.apply(this, args) : args[0];
+		const cache = memoized.cache;
+		if (cache.has(key)) return cache.get(key);
+		const result = func.apply(this, args);
+		memoized.cache = cache.set(key, result) || cache;
+		return result;
+	};
+	memoized.cache = new (memoize.Cache || Map)();
+	return memoized;
+}
+memoize.Cache = Map;
+//#endregion
+exports.memoize = memoize;