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/util/now.d.ts

@@ -0,0 +1,19 @@
+//#region src/compat/util/now.d.ts
+/**
+ * Returns the number of milliseconds elapsed since January 1, 1970 00:00:00 UTC.
+ *
+ * @returns The current time in milliseconds.
+ *
+ * @example
+ * const currentTime = now();
+ * console.log(currentTime); // Outputs the current time in milliseconds
+ *
+ * @example
+ * const startTime = now();
+ * // Some time-consuming operation
+ * const endTime = now();
+ * console.log(`Operation took ${endTime - startTime} milliseconds`);
+ */
+declare function now(): number;
+//#endregion
+export { now };