feat: Check for service worker updates on feed load

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

webclient/src/Feed.js

@@ -20,6 +20,14 @@ function Feed({ updateCache }) {
 	useEffect(() => {
 		const controller = new AbortController();
 
+		if ('serviceWorker' in navigator) {
+			navigator.serviceWorker.getRegistration().then(reg => {
+				if (reg) {
+					reg.update();
+				}
+			});
+		}
+
 		fetch(filterSmallweb ? '/api?smallweb=true' : '/api', { signal: controller.signal })
 			.then(res => {
 				if (!res.ok) {