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/object/cloneDeep.d.ts

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+//#region src/compat/object/cloneDeep.d.ts
+/**
+ * Creates a deep clone of the given object.
+ *
+ * @template T - The type of the object.
+ * @param obj - The object to clone.
+ * @returns A deep clone of the given object.
+ *
+ * @example
+ * // Clone a primitive value
+ * const num = 29;
+ * const clonedNum = clone(num);
+ * console.log(clonedNum); // 29
+ * console.log(clonedNum === num); // true
+ *
+ * @example
+ * // Clone an array
+ * const arr = [1, 2, 3];
+ * const clonedArr = clone(arr);
+ * console.log(clonedArr); // [1, 2, 3]
+ * console.log(clonedArr === arr); // false
+ *
+ * @example
+ * // Clone an array with nested objects
+ * const arr = [1, { a: 1 }, [1, 2, 3]];
+ * const clonedArr = clone(arr);
+ * arr[1].a = 2;
+ * console.log(arr); // [2, { a: 2 }, [1, 2, 3]]
+ * console.log(clonedArr); // [1, { a: 1 }, [1, 2, 3]]
+ * console.log(clonedArr === arr); // false
+ *
+ * @example
+ * // Clone an object
+ * const obj = { a: 1, b: 'es-toolkit', c: [1, 2, 3] };
+ * const clonedObj = clone(obj);
+ * console.log(clonedObj); // { a: 1, b: 'es-toolkit', c: [1, 2, 3] }
+ * console.log(clonedObj === obj); // false
+ *
+ * @example
+ * // Clone an object with nested objects
+ * const obj = { a: 1, b: { c: 1 } };
+ * const clonedObj = clone(obj);
+ * obj.b.c = 2;
+ * console.log(obj); // { a: 1, b: { c: 2 } }
+ * console.log(clonedObj); // { a: 1, b: { c: 1 } }
+ * console.log(clonedObj === obj); // false
+ */
+declare function cloneDeep<T>(obj: T): T;
+//#endregion
+export { cloneDeep };