diff --git a/frontend/index.html b/frontend/index.html
index e414c36..45e9fd5 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -15,6 +15,11 @@
     <link rel="apple-touch-icon" sizes="180x180" href="./apple-touch-icon.png" />
     <link rel="manifest" href="./site.webmanifest" />
     <script>
+      // Register minimal service worker for PWA installability.
+      if ('serviceWorker' in navigator) {
+        navigator.serviceWorker.register('./sw.js').catch(function() {});
+      }
+
       // Start critical data fetches before React/Vite JS loads.
       // Must be in <head> BEFORE the module script so the browser queues these
       // fetches before it discovers and starts downloading the JS bundle.
diff --git a/frontend/public/sw.js b/frontend/public/sw.js
new file mode 100644
index 0000000..61901c7
--- /dev/null
+++ b/frontend/public/sw.js
@@ -0,0 +1,12 @@
+// Minimal service worker required for PWA installability.
+// No caching — this app is network-dependent. All fetches pass through.
+
+self.addEventListener("install", function () {
+  self.skipWaiting();
+});
+
+self.addEventListener("activate", function (event) {
+  event.waitUntil(self.clients.claim());
+});
+
+self.addEventListener("fetch", function () {});
