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/lt.d.mts

@@ -0,0 +1,16 @@
+//#region src/compat/util/lt.d.ts
+/**
+ * Checks if value is less than other.
+ *
+ * @param value The value to compare.
+ * @param other The other value to compare.
+ * @returns Returns `true` if value is less than other, else `false`.
+ *
+ * @example
+ * lt(1, 3); // true
+ * lt(3, 3); // false
+ * lt(3, 1); // false
+ */
+declare function lt(value: any, other: any): boolean;
+//#endregion
+export { lt };