feat: add secure auth, admin and postgres persistence

public/sw.js

@@ -1,7 +1,7 @@
 const CACHE_NAME = "roast-planner-static-v1";
 const APP_SHELL = [
   "/",
-  "/index.html",
+  "/landing.html",
   "/app.css",
   "/worksheet.css",
   "/manifest.webmanifest",
@@ -40,7 +40,8 @@ self.addEventListener("fetch", (event) => {
   if (request.method !== "GET" || url.origin !== self.location.origin || url.pathname.startsWith("/api/")) return;
 
   if (request.mode === "navigate") {
-    event.respondWith(fetch(request).catch(() => caches.match("/index.html")));
+    // Never serve authenticated application HTML from cache after logout.
+    event.respondWith(fetch(request).catch(() => caches.match("/landing.html")));
     return;
   }