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/array/maxBy.d.mts

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+//#region src/array/maxBy.d.ts
+/**
+ * Finds the element in an array that has the maximum value when applying
+ * the `getValue` function to each element.
+ *
+ * @template T - The type of elements in the array.
+ * @param items The nonempty array of elements to search.
+ * @param getValue A function that selects a numeric value from each element.
+ * @returns The element with the maximum value as determined by the `getValue` function.
+ * @example
+ * maxBy([{ a: 1 }, { a: 2 }, { a: 3 }], x => x.a); // Returns: { a: 3 }
+ * maxBy([], x => x.a); // Returns: undefined
+ * maxBy([3, NaN, 1], x => x); // Returns: NaN (NaN propagates, matching Math.max)
+ * maxBy(
+ *   [
+ *     { name: 'john', age: 30 },
+ *     { name: 'jane', age: 28 },
+ *     { name: 'joe', age: 26 },
+ *   ],
+ *   x => x.age
+ * ); // Returns: { name: 'john', age: 30 }
+ */
+declare function maxBy<T>(items: readonly [T, ...T[]], getValue: (element: T, index: number, array: readonly T[]) => number): T;
+/**
+ * Finds the element in an array that has the maximum value when applying
+ * the `getValue` function to each element.
+ *
+ * @template T - The type of elements in the array.
+ * @param items The array of elements to search.
+ * @param getValue A function that selects a numeric value from each element.
+ * @returns The element with the maximum value as determined by the `getValue` function,
+ * or `undefined` if the array is empty.
+ * @example
+ * maxBy([{ a: 1 }, { a: 2 }, { a: 3 }], x => x.a); // Returns: { a: 3 }
+ * maxBy([], x => x.a); // Returns: undefined
+ * maxBy([3, NaN, 1], x => x); // Returns: NaN (NaN propagates, matching Math.max)
+ * maxBy(
+ *   [
+ *     { name: 'john', age: 30 },
+ *     { name: 'jane', age: 28 },
+ *     { name: 'joe', age: 26 },
+ *   ],
+ *   x => x.age
+ * ); // Returns: { name: 'john', age: 30 }
+ */
+declare function maxBy<T>(items: readonly T[], getValue: (element: T, index: number, array: readonly T[]) => number): T | undefined;
+//#endregion
+export { maxBy };