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/util/uniqueId.d.mts

@@ -0,0 +1,26 @@
+//#region src/compat/util/uniqueId.d.ts
+/**
+ * Generates a unique identifier, optionally prefixed with a given string.
+ *
+ * @param [prefix] - An optional string to prefix the unique identifier.
+ *                            If not provided or not a string, only the unique
+ *                            numeric identifier is returned.
+ * @returns A string containing the unique identifier, with the optional
+ *                   prefix if provided.
+ *
+ * @example
+ * // Generate a unique ID with a prefix
+ * uniqueId('user_');  // => 'user_1'
+ *
+ * @example
+ * // Generate a unique ID without a prefix
+ * uniqueId();  // => '2'
+ *
+ * @example
+ * // Subsequent calls increment the internal counter
+ * uniqueId('item_');  // => 'item_3'
+ * uniqueId();         // => '4'
+ */
+declare function uniqueId(prefix?: string): string;
+//#endregion
+export { uniqueId };