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-recipes/src/warmStrategyCache.ts

@@ -0,0 +1,34 @@
+import {Strategy} from 'workbox-strategies/Strategy.js';
+
+import './_version.js';
+
+export interface WarmStrategyCacheOptions {
+  urls: Array<string>;
+  strategy: Strategy;
+}
+
+// Give TypeScript the correct global.
+declare let self: ServiceWorkerGlobalScope;
+
+/**
+ * @memberof workbox-recipes
+ 
+ * @param {Object} options 
+ * @param {string[]} options.urls Paths to warm the strategy's cache with
+ * @param {Strategy} options.strategy Strategy to use
+ */
+function warmStrategyCache(options: WarmStrategyCacheOptions): void {
+  self.addEventListener('install', (event) => {
+    const done = options.urls.map(
+      (path) =>
+        options.strategy.handleAll({
+          event,
+          request: new Request(path),
+        })[1],
+    );
+
+    event.waitUntil(Promise.all(done));
+  });
+}
+
+export {warmStrategyCache};