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-precaching/matchPrecache.d.ts

@@ -0,0 +1,18 @@
+import './_version.js';
+/**
+ * Helper function that calls
+ * {@link PrecacheController#matchPrecache} on the default
+ * {@link PrecacheController} instance.
+ *
+ * If you are creating your own {@link PrecacheController}, then call
+ * {@link PrecacheController#matchPrecache} on that instance,
+ * instead of using this function.
+ *
+ * @param {string|Request} request The key (without revisioning parameters)
+ * to look up in the precache.
+ * @return {Promise<Response|undefined>}
+ *
+ * @memberof workbox-precaching
+ */
+declare function matchPrecache(request: string | Request): Promise<Response | undefined>;
+export { matchPrecache };