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/findIndex.mjs

@@ -0,0 +1,24 @@
+//#region src/fp/array/findIndex.ts
+/**
+* Creates a function that returns the index of the first value matching a predicate.
+*
+* The predicate receives the value, index, and full input array. The returned function
+* returns -1 when no value matches, matching Array.prototype.findIndex.
+*
+* @template T - The type of elements in the array.
+* @param predicate - Called with each value, index, and array until it returns true.
+* @returns A function that maps a readonly array to the first matching index, or -1.
+*
+* @example
+* import { findIndex, pipe } from 'es-toolkit/fp';
+*
+* pipe([{ id: 1 }, { id: 2 }], findIndex(item => item.id === 2));
+* // => 1
+*/
+function findIndex(predicate) {
+	return function(array) {
+		return array.findIndex(predicate);
+	};
+}
+//#endregion
+export { findIndex };