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/withTimeout.d.ts

@@ -0,0 +1,47 @@
+//#region src/promise/withTimeout.d.ts
+interface WithTimeoutOptions {
+  signal?: AbortSignal;
+}
+/**
+ * Executes an async function and enforces a timeout.
+ *
+ * If the promise does not resolve within the specified time,
+ * the timeout will trigger and the returned promise will be rejected.
+ *
+ * You can pass an `AbortSignal` to cancel the timeout. Aborting the signal lifts the
+ * time limit: the timeout stops counting and `run`'s promise is awaited without a
+ * deadline. It does not reject the returned promise or abort `run` itself — pass the
+ * same signal into `run` if you also want to cancel the underlying work.
+ *
+ * @template T
+ * @param run - A function that returns a promise to be executed.
+ * @param ms - The timeout duration in milliseconds.
+ * @param options - The options object.
+ * @param options.signal - An optional AbortSignal to cancel the timeout. When aborted, the time limit is lifted.
+ * @returns A promise that resolves with the result of the `run` function or rejects if the timeout is reached.
+ *
+ * @example
+ * async function fetchData() {
+ *   const response = await fetch('https://example.com/data');
+ *   return response.json();
+ * }
+ *
+ * try {
+ *   const data = await withTimeout(fetchData, 1000);
+ *   console.log(data); // Logs the fetched data if `fetchData` is resolved within 1 second.
+ * } catch (error) {
+ *   console.error(error); // Will log 'TimeoutError' if `fetchData` is not resolved within 1 second.
+ * }
+ *
+ * @example
+ * // Lift the time limit when the user opts to keep waiting.
+ * const controller = new AbortController();
+ * keepWaitingButton.onclick = () => controller.abort();
+ *
+ * const data = await withTimeout(fetchData, 1000, { signal: controller.signal });
+ */
+declare function withTimeout<T>(run: () => Promise<T>, ms: number, {
+  signal
+}?: WithTimeoutOptions): Promise<T>;
+//#endregion
+export { withTimeout };