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/compat/array/union.js

@@ -0,0 +1,38 @@
+const require_uniq = require("../../array/uniq.js");
+const require_isArrayLikeObject = require("../predicate/isArrayLikeObject.js");
+const require_flatMapDepth = require("./flatMapDepth.js");
+//#region src/compat/array/union.ts
+/**
+* This function takes multiple arrays and returns a new array containing only the unique values
+* from all input arrays, preserving the order of their first occurrence.
+*
+* @template T - The type of elements in the arrays.
+* @param arrays - The arrays to inspect.
+* @returns Returns the new array of combined unique values.
+*
+* @example
+* // Returns [2, 1]
+* union([2], [1, 2]);
+*
+* @example
+* // Returns [2, 1, 3]
+* union([2], [1, 2], [2, 3]);
+*
+* @example
+* // Returns [1, 3, 2, [5], [4]] (does not deeply flatten nested arrays)
+* union([1, 3, 2], [1, [5]], [2, [4]]);
+*
+* @example
+* // Returns [0, 2, 1] (ignores non-array values like 3 and { '0': 1 })
+* union([0], 3, { '0': 1 }, null, [2, 1]);
+* @example
+* // Returns [0, 'a', 2, 1] (treats array-like object { 0: 'a', length: 1 } as a valid array)
+* union([0], { 0: 'a', length: 1 }, [2, 1]);
+*/
+function union(...arrays) {
+	const validArrays = arrays.filter(require_isArrayLikeObject.isArrayLikeObject);
+	const flattened = require_flatMapDepth.flatMapDepth(validArrays, (v) => Array.from(v), 1);
+	return require_uniq.uniq(flattened);
+}
+//#endregion
+exports.union = union;