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/delay.d.ts

@@ -0,0 +1,41 @@
+//#region src/promise/delay.d.ts
+interface DelayOptions {
+  signal?: AbortSignal;
+}
+/**
+ * Delays the execution of code for a specified number of milliseconds.
+ *
+ * This function returns a Promise that resolves after the specified delay, allowing you to use it
+ * with async/await to pause execution.
+ *
+ * @param ms - The number of milliseconds to delay.
+ * @param options - The options object.
+ * @param options.signal - An optional AbortSignal to cancel the delay.
+ * @returns A Promise that resolves after the specified delay.
+ *
+ * @example
+ * async function foo() {
+ *   console.log('Start');
+ *   await delay(1000); // Delays execution for 1 second
+ *   console.log('End');
+ * }
+ *
+ * foo();
+ *
+ * // With AbortSignal
+ * const controller = new AbortController();
+ * const { signal } = controller;
+ *
+ * setTimeout(() => controller.abort(), 50); // Will cancel the delay after 50ms
+ * try {
+ *   await delay(100, { signal });
+ *  } catch (error) {
+ *   console.error(error); // Will log 'AbortError'
+ *  }
+ * }
+ */
+declare function delay(ms: number, {
+  signal
+}?: DelayOptions): Promise<void>;
+//#endregion
+export { delay };