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.mjs

@@ -0,0 +1,30 @@
+//#region src/array/tail.ts
+/**
+* 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 []
+*/
+function tail(arr) {
+	return arr.slice(1);
+}
+//#endregion
+export { tail };