fix: stale whie revalidate service worker cache

src/App.jsx

@@ -14,6 +14,7 @@ import BeanDetail from "./components/BeanDetail";
 import BrewCard from "./components/BrewCard";
 import BottomNav from "./components/BottomNav";
 import IosPromptModal from "./components/IosPromptModal";
+import UpdatePrompt from "./components/UpdatePrompt";
 
 
 // Import constants
@@ -343,6 +344,9 @@ export default function CoffeeLogbook() {
       
       {/* iOS/iPadOS PWA Install Prompt */}
       <IosPromptModal />
+
+      {/* PWA Update Prompt */}
+      <UpdatePrompt />
     </div>
   );
 }