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/array/includes.d.mts

@@ -0,0 +1,23 @@
+//#region src/compat/array/includes.d.ts
+/**
+ * Checks if a specified value exists within a given array-like collection.
+ *
+ * The comparison uses SameValueZero to check for inclusion.
+ *
+ * @template T The type of elements in the collection
+ * @param collection The array-like collection to search in
+ * @param target The value to search for in the collection
+ * @param [fromIndex=0] The index to start searching from. If negative, it is treated as an offset from the end
+ * @returns `true` if the value is found in the collection, `false` otherwise
+ *
+ * @example
+ * includes([1, 2, 3], 2); // true
+ * includes([1, 2, 3], 4); // false
+ * includes('hello', 'e'); // true
+ * includes(null, 1); // false
+ * includes([1, 2, 3], 2, 2); // false
+ * includes([1, 2, 3], 2, -2); // true
+ */
+declare function includes<T>(collection: Record<string, T> | Record<number, T> | null | undefined, target: T, fromIndex?: number): boolean;
+//#endregion
+export { includes };