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/string/repeat.d.mts

@@ -0,0 +1,18 @@
+//#region src/compat/string/repeat.d.ts
+/**
+ * Repeats the given string n times.
+ *
+ * If n is less than 1, an empty string is returned, or if the string is an empty string,
+ * the original string is returned unchanged.
+ *
+ * @param str - The string to repeat.
+ * @param n - The number of times to repeat the string.
+ * @returns The repeated string, or an empty string if n is less than 1.
+ *
+ * @example
+ * repeat('abc', 0); // ''
+ * repeat('abc', 2); // 'abcabc'
+ */
+declare function repeat(str?: string, n?: number): string;
+//#endregion
+export { repeat };