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/promise/allKeyed.d.ts

@@ -0,0 +1,31 @@
+//#region src/promise/allKeyed.d.ts
+/**
+ * Resolves an object of promises concurrently, returning an object with the same keys and resolved values.
+ *
+ * Similar to `Promise.all`, but accepts an object of promises instead of an array,
+ * preserving the keys in the result. This makes it easy to destructure the resolved values
+ * by name instead of relying on positional indices.
+ *
+ * Based on the [TC39 `Promise.allKeyed` proposal](https://github.com/tc39/proposal-await-dictionary).
+ *
+ * @template T - A record type where each value is a promise or a value.
+ * @param tasks - An object whose values are promises (or plain values) to resolve concurrently.
+ * @returns>} A promise that resolves to an object with the same keys and resolved values.
+ *
+ * @example
+ * const { user, posts } = await allKeyed({
+ *   user: fetchUser(),
+ *   posts: fetchPosts(),
+ * });
+ *
+ * @example
+ * // Plain values are also supported
+ * const result = await allKeyed({
+ *   a: Promise.resolve(1),
+ *   b: 2,
+ * });
+ * // { a: 1, b: 2 }
+ */
+declare function allKeyed<T extends Record<string, unknown>>(tasks: T): Promise<{ [K in keyof T]: Awaited<T[K]> }>;
+//#endregion
+export { allKeyed };