diff --git a/backend/data/recipes.db-shm b/backend/data/recipes.db-shm
index 6034303..626b8f9 100644
Binary files a/backend/data/recipes.db-shm and b/backend/data/recipes.db-shm differ
diff --git a/backend/data/recipes.db-wal b/backend/data/recipes.db-wal
index a4b8b97..78845cc 100644
Binary files a/backend/data/recipes.db-wal and b/backend/data/recipes.db-wal differ
diff --git a/backend/src/app.ts b/backend/src/app.ts
index 26a2b71..32c3cad 100644
--- a/backend/src/app.ts
+++ b/backend/src/app.ts
@@ -9,6 +9,7 @@ import { tagRoutes } from './routes/tags.js';
 import { imageRoutes } from './routes/images.js';
 import { botRoutes } from './routes/bot.js';
 import { ogScrapeRoutes } from './routes/og-scrape.js';
+import { authRoutes } from './routes/auth.js';
 
 export async function buildApp() {
   const app = Fastify({ logger: true });
@@ -43,5 +44,8 @@ export async function buildApp() {
   await app.register(ogScrapeRoutes);
   await app.after();
 
+  await app.register(authRoutes);
+  await app.after();
+
   return app;
 }
diff --git a/backend/src/middleware/auth.ts b/backend/src/middleware/auth.ts
new file mode 100644
index 0000000..d0705f6
--- /dev/null
+++ b/backend/src/middleware/auth.ts
@@ -0,0 +1,7 @@
+import type { FastifyRequest, FastifyReply } from 'fastify';
+
+// v2: Auth middleware — currently passes through everything
+export async function authMiddleware(request: FastifyRequest, _reply: FastifyReply) {
+  // TODO v2: Verify JWT token, set request.user
+  (request as any).user = { id: 'default', name: 'Luna' };
+}
diff --git a/backend/src/routes/auth.ts b/backend/src/routes/auth.ts
new file mode 100644
index 0000000..818ace3
--- /dev/null
+++ b/backend/src/routes/auth.ts
@@ -0,0 +1,15 @@
+import type { FastifyInstance } from 'fastify';
+
+export async function authRoutes(app: FastifyInstance) {
+  app.post('/api/auth/login', async (_request, reply) => {
+    reply.status(501).send({ error: 'not implemented' });
+  });
+
+  app.post('/api/auth/register', async (_request, reply) => {
+    reply.status(501).send({ error: 'not implemented' });
+  });
+
+  app.get('/api/auth/me', async (_request, reply) => {
+    reply.status(501).send({ error: 'not implemented' });
+  });
+}
diff --git a/features/AUTH-V2.md b/features/AUTH-V2.md
new file mode 100644
index 0000000..e628a76
--- /dev/null
+++ b/features/AUTH-V2.md
@@ -0,0 +1,63 @@
+# AUTH v2 — Spezifikation
+
+## Übersicht
+Simple Authentifizierung für Luna Recipes, damit mehrere User die App nutzen können.
+
+## Auth-Methode
+- **Email + Passwort** (primär)
+- **Optional: PIN-Login** (4-6 Ziffern, für schnellen Zugang auf vertrautem Gerät)
+- **Kein OAuth/Social Login** — zu komplex für v2
+
+## Token-Strategie
+- **JWT Access Token** — kurze Laufzeit (15 min)
+- **Refresh Token** — lange Laufzeit (30 Tage), httpOnly Cookie
+- Token-Rotation bei jedem Refresh
+- Logout invalidiert Refresh Token
+
+## Multi-User Support
+- Vorgesehene User: **Luna**, **Marc**, **Gäste**
+- Gast-Zugang: Read-only, kein Login nötig (Feature-Flag)
+- Jeder User hat eigene Favoriten und Notizen
+- Rezepte gehören einem User (created_by)
+- Einkaufsliste: Shared per Haushalt (alle sehen dieselbe)
+
+## Datenmodell-Änderungen
+```sql
+CREATE TABLE users (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  email TEXT UNIQUE NOT NULL,
+  name TEXT NOT NULL,
+  password_hash TEXT NOT NULL,
+  pin_hash TEXT,
+  created_at TIMESTAMPTZ DEFAULT NOW()
+);
+
+-- Bestehende Tabellen erweitern:
+ALTER TABLE recipes ADD COLUMN created_by UUID REFERENCES users(id);
+ALTER TABLE notes ADD COLUMN user_id UUID REFERENCES users(id);
+ALTER TABLE favorites ADD COLUMN user_id UUID REFERENCES users(id);
+```
+
+## API-Endpunkte
+- `POST /api/auth/register` — { email, password, name }
+- `POST /api/auth/login` — { email, password } → { accessToken, user }
+- `POST /api/auth/refresh` — Cookie → { accessToken }
+- `POST /api/auth/logout` — Invalidiert Refresh Token
+- `GET /api/auth/me` — Aktueller User
+
+## Sharing
+- Rezept-Links sind öffentlich teilbar (kein Login zum Ansehen nötig)
+- Format: `/recipe/:slug` (bleibt gleich)
+- Optional: "Rezept kopieren" Button für eingeloggte User
+
+## Migration
+- Alle bestehenden Rezepte werden dem Default-User (Luna) zugewiesen
+- Bestehende Favoriten/Notizen → Luna
+- Keine Breaking Changes für nicht-eingeloggte Nutzung in v2.0
+
+## Nicht in v2
+- Social Login (Google, Apple)
+- Email-Verifizierung
+- Passwort-Reset per Email
+- Admin-Panel
+- Rollen/Permissions
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 57978e3..7396592 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -4,6 +4,7 @@ import { HomePage } from './pages/HomePage'
 import { RecipePage } from './pages/RecipePage'
 import { SearchPage } from './pages/SearchPage'
 import { PlaceholderPage } from './pages/PlaceholderPage'
+import { ProfilePage } from './pages/ProfilePage'
 import { RecipeFormPage } from './pages/RecipeFormPage'
 import { ShoppingPage } from './pages/ShoppingPage'
 
@@ -18,7 +19,7 @@ export default function App() {
           <Route path="new" element={<RecipeFormPage />} />
           <Route path="recipe/:slug/edit" element={<RecipeFormPage />} />
           <Route path="shopping" element={<ShoppingPage />} />
-          <Route path="profile" element={<PlaceholderPage title="Profil" icon="👤" />} />
+          <Route path="profile" element={<ProfilePage />} />
         </Route>
       </Routes>
     </BrowserRouter>
diff --git a/frontend/src/api/auth.ts b/frontend/src/api/auth.ts
new file mode 100644
index 0000000..c1015f5
--- /dev/null
+++ b/frontend/src/api/auth.ts
@@ -0,0 +1,21 @@
+import { apiFetch } from './client'
+
+// v2: Auth API — placeholder functions
+
+export interface User {
+  id: string
+  name: string
+  email?: string
+}
+
+export function login(_email: string, _password: string) {
+  return apiFetch<User>('/auth/login', { method: 'POST', body: JSON.stringify({ email: _email, password: _password }) })
+}
+
+export function register(_email: string, _password: string, _name: string) {
+  return apiFetch<User>('/auth/register', { method: 'POST', body: JSON.stringify({ email: _email, password: _password, name: _name }) })
+}
+
+export function fetchMe() {
+  return apiFetch<User>('/auth/me')
+}
diff --git a/frontend/src/pages/HomePage.tsx b/frontend/src/pages/HomePage.tsx
index 5d87138..b1d3fe5 100644
--- a/frontend/src/pages/HomePage.tsx
+++ b/frontend/src/pages/HomePage.tsx
@@ -51,7 +51,7 @@ export function HomePage() {
   const handleRandomRecipe = async () => {
     try {
       const recipe = await fetchRandomRecipe()
-      if (recipe?.slug) navigate(`/recipe/${recipe.slug}`)
+      if (recipe?.slug) navigate(`/recipe/${recipe.slug}?from=random`)
     } catch {
       // no recipes
     }
diff --git a/frontend/src/pages/ProfilePage.tsx b/frontend/src/pages/ProfilePage.tsx
new file mode 100644
index 0000000..8370b9e
--- /dev/null
+++ b/frontend/src/pages/ProfilePage.tsx
@@ -0,0 +1,99 @@
+import { useQuery } from '@tanstack/react-query'
+import { motion } from 'framer-motion'
+import { fetchRecipes } from '../api/recipes'
+import { fetchShopping } from '../api/shopping'
+import { LogOut, Info, Heart, BookOpen, ShoppingCart } from 'lucide-react'
+
+export function ProfilePage() {
+  const { data: allRecipes } = useQuery({
+    queryKey: ['recipes', {}],
+    queryFn: () => fetchRecipes({}),
+  })
+
+  const { data: favRecipes } = useQuery({
+    queryKey: ['recipes', { favorite: true }],
+    queryFn: () => fetchRecipes({ favorite: true }),
+  })
+
+  const { data: shoppingGroups } = useQuery({
+    queryKey: ['shopping'],
+    queryFn: fetchShopping,
+  })
+
+  const totalRecipes = allRecipes?.total ?? 0
+  const totalFavorites = favRecipes?.total ?? 0
+  const totalShoppingItems = (shoppingGroups ?? []).reduce((acc, g) => acc + g.items.length, 0)
+
+  const stats = [
+    { icon: <BookOpen size={18} />, label: 'Rezepte', value: totalRecipes },
+    { icon: <Heart size={18} />, label: 'Favoriten', value: totalFavorites },
+    { icon: <ShoppingCart size={18} />, label: 'Einkauf', value: totalShoppingItems },
+  ]
+
+  return (
+    <div className="min-h-screen">
+      {/* Header */}
+      <div className="px-4 py-6 text-center">
+        <motion.div
+          className="w-20 h-20 rounded-full bg-primary-light flex items-center justify-center text-3xl mx-auto mb-3"
+          initial={{ scale: 0.8, opacity: 0 }}
+          animate={{ scale: 1, opacity: 1 }}
+        >
+          👤
+        </motion.div>
+        <h1 className="font-display text-2xl text-espresso">Luna</h1>
+        <p className="text-sm text-warm-grey mt-1">Hobbyköchin & Rezeptsammlerin</p>
+      </div>
+
+      {/* Stats */}
+      <div className="px-4 pb-6">
+        <div className="grid grid-cols-3 gap-3">
+          {stats.map((stat) => (
+            <motion.div
+              key={stat.label}
+              className="bg-surface rounded-2xl p-4 text-center shadow-sm"
+              initial={{ opacity: 0, y: 10 }}
+              animate={{ opacity: 1, y: 0 }}
+            >
+              <div className="flex justify-center text-primary mb-1">{stat.icon}</div>
+              <div className="font-display text-xl text-espresso">{stat.value}</div>
+              <div className="text-xs text-warm-grey">{stat.label}</div>
+            </motion.div>
+          ))}
+        </div>
+      </div>
+
+      {/* App Info */}
+      <div className="px-4 pb-6">
+        <div className="bg-surface rounded-2xl p-4 shadow-sm space-y-3">
+          <div className="flex items-center gap-2 text-espresso font-medium text-sm">
+            <Info size={16} className="text-primary" />
+            App-Info
+          </div>
+          <div className="text-sm text-warm-grey space-y-1">
+            <div className="flex justify-between">
+              <span>Version</span>
+              <span className="text-espresso">1.0</span>
+            </div>
+            <div className="flex justify-between">
+              <span>Erstellt</span>
+              <span className="text-espresso">Made with 💕 by Moldi</span>
+            </div>
+          </div>
+        </div>
+      </div>
+
+      {/* Logout Button */}
+      <div className="px-4 pb-8">
+        <button
+          disabled
+          title="Kommt in v2"
+          className="w-full flex items-center justify-center gap-2 bg-sand/50 text-warm-grey px-4 py-3 rounded-xl font-medium text-sm cursor-not-allowed opacity-60 min-h-[44px]"
+        >
+          <LogOut size={18} />
+          Abmelden — kommt in v2
+        </button>
+      </div>
+    </div>
+  )
+}
diff --git a/frontend/src/pages/RecipePage.tsx b/frontend/src/pages/RecipePage.tsx
index 3f277b7..3a304e2 100644
--- a/frontend/src/pages/RecipePage.tsx
+++ b/frontend/src/pages/RecipePage.tsx
@@ -1,10 +1,11 @@
-import { useState } from 'react'
-import { useParams, useNavigate, Link } from 'react-router'
+import { useState, useCallback } from 'react'
+import { useParams, useNavigate, useSearchParams, Link } from 'react-router'
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
 import { motion } from 'framer-motion'
 import toast from 'react-hot-toast'
 import { ArrowLeft, Heart, Clock, Users, ChefHat, ShoppingCart, Pencil, Minus, Plus, Send, Trash2 } from 'lucide-react'
-import { fetchRecipe, toggleFavorite } from '../api/recipes'
+import { Dices } from 'lucide-react'
+import { fetchRecipe, toggleFavorite, fetchRandomRecipe } from '../api/recipes'
 import { addFromRecipe } from '../api/shopping'
 import { createNote, deleteNote } from '../api/notes'
 import { Badge } from '../components/ui/Badge'
@@ -15,9 +16,21 @@ const gradients = ['from-primary/40 to-secondary/40', 'from-secondary/40 to-sage
 export function RecipePage() {
   const { slug } = useParams<{ slug: string }>()
   const navigate = useNavigate()
+  const [searchParams] = useSearchParams()
+  const fromRandom = searchParams.get('from') === 'random'
   const qc = useQueryClient()
   const [servingScale, setServingScale] = useState<number | null>(null)
   const [noteText, setNoteText] = useState('')
+  const [rerolling, setRerolling] = useState(false)
+
+  const handleReroll = useCallback(async () => {
+    setRerolling(true)
+    try {
+      const r = await fetchRandomRecipe()
+      if (r?.slug) navigate(`/recipe/${r.slug}?from=random`, { replace: true })
+    } catch { /* ignore */ }
+    setRerolling(false)
+  }, [navigate])
 
   const { data: recipe, isLoading } = useQuery({
     queryKey: ['recipe', slug],
@@ -298,6 +311,18 @@ export function RecipePage() {
           </div>
         </div>
       </div>
+
+      {/* Floating Re-Roll Button */}
+      {fromRandom && (
+        <button
+          onClick={handleReroll}
+          disabled={rerolling}
+          className="fixed bottom-20 right-4 z-50 w-12 h-12 rounded-full bg-gradient-to-r from-primary to-secondary text-white shadow-lg flex items-center justify-center active:scale-95 transition-transform disabled:opacity-50"
+          title="Nochmal würfeln"
+        >
+          <Dices size={20} className={rerolling ? 'animate-spin' : ''} />
+        </button>
+      )}
     </motion.div>
   )
 }
diff --git a/frontend/src/pages/ShoppingPage.tsx b/frontend/src/pages/ShoppingPage.tsx
index 294eb09..b9b2e07 100644
--- a/frontend/src/pages/ShoppingPage.tsx
+++ b/frontend/src/pages/ShoppingPage.tsx
@@ -52,7 +52,10 @@ export function ShoppingPage() {
   }
 
   const hasChecked = groups.some((g) => g.items.some((i) => i.checked))
-  const totalUnchecked = groups.reduce((acc, g) => acc + g.items.filter((i) => !i.checked).length, 0)
+  const totalItems = groups.reduce((acc, g) => acc + g.items.length, 0)
+  const totalChecked = groups.reduce((acc, g) => acc + g.items.filter((i) => i.checked).length, 0)
+  const totalUnchecked = totalItems - totalChecked
+  const recipeCount = groups.filter((g) => g.recipe_id).length
 
   // Sort items: unchecked first, checked last
   const sortItems = (items: ShoppingItem[]) => {
@@ -156,6 +159,27 @@ export function ShoppingPage() {
         </form>
       </div>
 
+      {/* Summary */}
+      {totalItems > 0 && (
+        <div className="px-4 pb-2">
+          <div className="bg-primary-light/30 rounded-2xl p-3">
+            <div className="flex items-center justify-between text-sm text-espresso">
+              <span>
+                {recipeCount > 0 && <>{recipeCount} Rezept{recipeCount !== 1 ? 'e' : ''} · </>}
+                {totalItems} Artikel · {totalChecked} erledigt
+              </span>
+              <span className="text-warm-grey text-xs">{totalItems > 0 ? Math.round((totalChecked / totalItems) * 100) : 0}%</span>
+            </div>
+            <div className="mt-2 h-1.5 bg-sand rounded-full overflow-hidden">
+              <div
+                className="h-full bg-primary rounded-full transition-all duration-300"
+                style={{ width: `${totalItems > 0 ? (totalChecked / totalItems) * 100 : 0}%` }}
+              />
+            </div>
+          </div>
+        </div>
+      )}
+
       {/* Content */}
       <div className="px-4 pb-24 space-y-4">
         {groups.length === 0 ? (
diff --git a/frontend/vite.config.ts b/frontend/vite.config.ts
index 9aac067..4207f70 100644
--- a/frontend/vite.config.ts
+++ b/frontend/vite.config.ts
@@ -9,6 +9,31 @@ export default defineConfig({
     tailwindcss(),
     VitePWA({
       registerType: 'autoUpdate',
+      workbox: {
+        globPatterns: ['**/*.{js,css,html,ico,png,svg,webp,woff2}'],
+        runtimeCaching: [
+          {
+            urlPattern: /\/api\/shopping/,
+            handler: 'NetworkFirst',
+            options: { cacheName: 'shopping-api', expiration: { maxEntries: 10, maxAgeSeconds: 86400 } },
+          },
+          {
+            urlPattern: /\/api\/recipes/,
+            handler: 'StaleWhileRevalidate',
+            options: { cacheName: 'recipes-api', expiration: { maxEntries: 50, maxAgeSeconds: 86400 } },
+          },
+          {
+            urlPattern: /\/api\/categories/,
+            handler: 'CacheFirst',
+            options: { cacheName: 'categories-api', expiration: { maxEntries: 10, maxAgeSeconds: 604800 } },
+          },
+          {
+            urlPattern: /\/images\//,
+            handler: 'CacheFirst',
+            options: { cacheName: 'recipe-images', expiration: { maxEntries: 100, maxAgeSeconds: 2592000 } },
+          },
+        ],
+      },
       manifest: {
         name: 'Luna Recipes',
         short_name: 'Luna',