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/fp/array/findLastIndex.js

@@ -0,0 +1,25 @@
+//#region src/fp/array/findLastIndex.ts
+/**
+* Creates a function that returns the index of the last value matching a predicate.
+*
+* The predicate receives the value, index, and full input array while scanning from right
+* to left. The returned function returns -1 when no value matches.
+*
+* @template T - The type of elements in the array.
+* @param predicate - Called with each value, index, and array from right to left until it returns true.
+* @returns A function that maps a readonly array to the last matching index, or -1.
+*
+* @example
+* import { findLastIndex, pipe } from 'es-toolkit/fp';
+*
+* pipe([1, 2, 3, 2], findLastIndex(value => value === 2));
+* // => 3
+*/
+function findLastIndex(predicate) {
+	return function(array) {
+		for (let index = array.length - 1; index >= 0; index--) if (predicate(array[index], index, array)) return index;
+		return -1;
+	};
+}
+//#endregion
+exports.findLastIndex = findLastIndex;