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/bindKey.js

@@ -0,0 +1,57 @@
+//#region src/compat/function/bindKey.ts
+/**
+* Creates a function that invokes the method at `object[key]` with `partialArgs` prepended to the arguments it receives.
+*
+* This method differs from `bind` by allowing bound functions to reference methods that may be redefined or don't yet exist.
+*
+* The `bindKey.placeholder` value, which defaults to a `symbol`, may be used as a placeholder for partially applied arguments.
+*
+* @template T - The type of the object to bind.
+* @template K - The type of the key to bind.
+* @param object - The object to invoke the method on.
+* @param key - The key of the method.
+* @param partialArgs - The arguments to be partially applied.
+* @returns Returns the new bound function.
+*
+* @example
+* const object = {
+*   user: 'fred',
+*   greet: function (greeting, punctuation) {
+*     return greeting + ' ' + this.user + punctuation;
+*   },
+* };
+*
+* let bound = bindKey(object, 'greet', 'hi');
+* bound('!');
+* // => 'hi fred!'
+*
+* object.greet = function (greeting, punctuation) {
+*   return greeting + 'ya ' + this.user + punctuation;
+* };
+*
+* bound('!');
+* // => 'hiya fred!'
+*
+* // Bound with placeholders.
+* bound = bindKey(object, 'greet', bindKey.placeholder, '!');
+* bound('hi');
+* // => 'hiya fred!'
+*/
+function bindKey(object, key, ...partialArgs) {
+	const bound = function(...providedArgs) {
+		const args = [];
+		let startIndex = 0;
+		for (let i = 0; i < partialArgs.length; i++) {
+			const arg = partialArgs[i];
+			if (arg === bindKey.placeholder) args.push(providedArgs[startIndex++]);
+			else args.push(arg);
+		}
+		for (let i = startIndex; i < providedArgs.length; i++) args.push(providedArgs[i]);
+		if (this instanceof bound) return new object[key](...args);
+		return object[key].apply(object, args);
+	};
+	return bound;
+}
+bindKey.placeholder = Symbol("bindKey.placeholder");
+//#endregion
+exports.bindKey = bindKey;