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/workbox-broadcast-update/responsesAreSame.d.ts

@@ -0,0 +1,14 @@
+import './_version.js';
+/**
+ * Given two `Response's`, compares several header values to see if they are
+ * the same or not.
+ *
+ * @param {Response} firstResponse
+ * @param {Response} secondResponse
+ * @param {Array<string>} headersToCheck
+ * @return {boolean}
+ *
+ * @memberof workbox-broadcast-update
+ */
+declare const responsesAreSame: (firstResponse: Response, secondResponse: Response, headersToCheck: string[]) => boolean;
+export { responsesAreSame };