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/combinations.mjs

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+import { combinations as combinations$1 } from "../../array/combinations.mjs";
+//#region src/fp/array/combinations.ts
+/**
+* Creates a function that returns every combination of the configured size.
+*
+* Elements are treated as unique by position, so duplicate values can produce identical-looking
+* combinations. The returned function throws when size is not a non-negative integer.
+*
+* @template T - The type of elements in the array.
+* @param size - The number of items in each combination.
+* @returns A function that maps a readonly array to its size-length combinations.
+* @throws {Error} When size is not a non-negative integer.
+*
+* @example
+* import { combinations, pipe } from 'es-toolkit/fp';
+*
+* pipe(['A', 'B', 'C'], combinations(2));
+* // => [['A', 'B'], ['A', 'C'], ['B', 'C']]
+*/
+function combinations(size) {
+	return function(array) {
+		return combinations$1(array, size);
+	};
+}
+//#endregion
+export { combinations };