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/array/tail.d.ts

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+//#region src/array/tail.d.ts
+/**
+ * Returns an empty array when the input is a single-element array.
+ *
+ * @template T - The type of the single element in the array.
+ * @param arr - The single-element array to process.
+ * @returns An empty array.
+ *
+ * @example
+ * const arr = [1];
+ * const result = tail(arr);
+ * // result will be []
+ */
+declare function tail<T>(arr: readonly [T]): [];
+/**
+ * Returns an empty array when the input is an empty array.
+ *
+ * @template T - The type of elements in the array.
+ * @param arr - The empty array to process.
+ * @returns An empty array.
+ *
+ * @example
+ * const arr = [];
+ * const result = tail(arr);
+ * // result will be []
+ */
+declare function tail(arr: readonly []): [];
+/**
+ * Returns a new array with all elements except for the first when the input is a tuple array.
+ *
+ * @template T - The type of the first element in the tuple array.
+ * @template U - The type of the remaining elements in the tuple array.
+ * @param arr - The tuple array to process.
+ * @returns A new array containing all elements of the input array except for the first one.
+ *
+ * @example
+ * const arr = [1, 2, 3];
+ * const result = tail(arr);
+ * // result will be [2, 3]
+ */
+declare function tail<T, U>(arr: readonly [T, ...U[]]): U[];
+/**
+ * Returns a new array with all elements except for the first.
+ *
+ * This function takes an array and returns a new array containing all the elements
+ * except for the first one. If the input array is empty or has only one element,
+ * an empty array is returned.
+ *
+ * @template T - The type of elements in the array.
+ * @param arr - The array to get the tail of.
+ * @returns A new array containing all elements of the input array except for the first one.
+ *
+ * @example
+ * const arr1 = [1, 2, 3];
+ * const result = tail(arr1);
+ * // result will be [2, 3]
+ *
+ * const arr2 = [1];
+ * const result2 = tail(arr2);
+ * // result2 will be []
+ *
+ * const arr3 = [];
+ * const result3 = tail(arr3);
+ * // result3 will be []
+ */
+declare function tail<T>(arr: readonly T[]): T[];
+//#endregion
+export { tail };