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/ary.d.ts

@@ -0,0 +1,25 @@
+//#region src/compat/function/ary.d.ts
+/**
+ * Creates a function that invokes func, with up to `n` arguments, ignoring any additional arguments.
+ * If `n` is not provided, it defaults to the function's length.
+ *
+ * @param func - The function to cap arguments for.
+ * @param [n] - The arity cap. Defaults to func.length.
+ * @returns Returns the new capped function.
+ *
+ * @example
+ * function fn(a: number, b: number, c: number) {
+ *   return Array.from(arguments);
+ * }
+ *
+ * // Cap at 2 arguments
+ * const capped = ary(fn, 2);
+ * capped(1, 2, 3); // [1, 2]
+ *
+ * // Default to function length
+ * const defaultCap = ary(fn);
+ * defaultCap(1, 2, 3); // [1, 2, 3]
+ */
+declare function ary(func: (...args: any[]) => any, n?: number): (...args: any[]) => any;
+//#endregion
+export { ary };