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/flattenDeep.mjs

@@ -0,0 +1,35 @@
+import { flattenDeep as flattenDeep$1 } from "../../array/flattenDeep.mjs";
+import { combineEagerAndLazyFunctions, createLazyFunction } from "../_internal/lazy.mjs";
+//#region src/fp/array/flattenDeep.ts
+/**
+* Creates a function that recursively flattens an array.
+*
+* The returned function is lazy-capable inside {@link pipe}. A trailing
+* short-circuiting operator can stop before later nested values are visited.
+*
+* @template T - The type of elements in the array.
+* @returns A function that maps the piped array to a deeply flattened array.
+*
+* @example
+* import { flattenDeep, pipe } from 'es-toolkit/fp';
+*
+* pipe([1, [2, [3]]], flattenDeep());
+* // => [1, 2, 3]
+*/
+function flattenDeep() {
+	function flattenDeepEager(array) {
+		return flattenDeep$1(array);
+	}
+	return combineEagerAndLazyFunctions(flattenDeepEager, createLazyFunction((value, _index, emit) => {
+		emitDeep(value, emit);
+	}));
+}
+function emitDeep(value, emit) {
+	if (Array.isArray(value)) {
+		for (let index = 0; index < value.length; index++) emitDeep(value[index], emit);
+		return;
+	}
+	emit(value);
+}
+//#endregion
+export { flattenDeep };