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/toFilled.mjs

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+import { toFilled as toFilled$1 } from "../../array/toFilled.mjs";
+//#region src/fp/array/toFilled.ts
+/**
+* Creates a function that returns a filled copy of an array.
+*
+* The returned function follows Array.prototype.fill indexing semantics through the main
+* {@link toFilled} implementation and does not mutate the input array.
+*
+* @template T - The type of elements in the input array.
+* @template U - The type of the fill value.
+* @param value - The value to write into the returned array.
+* @param start - The start index. Defaults to 0.
+* @param end - The end index. Defaults to the array length.
+* @returns A function that maps a readonly array to a filled copy.
+*
+* @example
+* import { pipe, toFilled } from 'es-toolkit/fp';
+*
+* pipe([1, 2, 3], toFilled(0, 1));
+* // => [1, 0, 0]
+*/
+function toFilled(value, start, end) {
+	return function(array) {
+		if (start == null) return toFilled$1(array, value);
+		if (end == null) return toFilled$1(array, value, start);
+		return toFilled$1(array, value, start, end);
+	};
+}
+//#endregion
+export { toFilled };