diff --git a/backend/routes/dogs.py b/backend/routes/dogs.py
index 9fb6b2c..9df065c 100644
--- a/backend/routes/dogs.py
+++ b/backend/routes/dogs.py
@@ -118,7 +118,9 @@ async def get_welcome_dashboard(dog_id: int, user=Depends(get_current_user)):
         ).fetchall()
         random_photo = None
         if photos:
-            chosen_url = _random.choice(photos)["url"]
+            import datetime as _dt2
+            day_num    = (_dt2.date.today() - _dt2.date(2024, 1, 1)).days
+            chosen_url = photos[day_num % len(photos)]["url"]
             random_photo = {
                 "url":         chosen_url,
                 "preview_url": preview_url_from(chosen_url),
diff --git a/backend/static/js/app.js b/backend/static/js/app.js
index ec1212e..343d915 100644
--- a/backend/static/js/app.js
+++ b/backend/static/js/app.js
@@ -3,7 +3,7 @@
    Router, State-Management, Navigation, Initialisierung.
    ============================================================ */
 
-const APP_VER = '459'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
+const APP_VER = '460'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
 
 const App = (() => {
 
diff --git a/backend/static/js/pages/welcome.js b/backend/static/js/pages/welcome.js
index 8b22aa4..6cac1f4 100644
--- a/backend/static/js/pages/welcome.js
+++ b/backend/static/js/pages/welcome.js
@@ -295,7 +295,7 @@ window.Page_welcome = (() => {
   const FEATURE_CARD_PAGES = new Set(FEATURE_CARDS.map(f => f.page));
 
   function _heroHTML(dog, dashData) {
-    const photoUrl = dashData?.random_photo?.url || null;
+    const photoUrl = dashData?.random_photo?.preview_url || dashData?.random_photo?.url || null;
     const avatarUrl = dog?.foto_url || null;
     const dogName   = dog ? UI.escape(dog.name) : 'Dein Hund';
     const dogRasse  = dog?.rasse ? UI.escape(dog.rasse) : '';
@@ -502,7 +502,7 @@ window.Page_welcome = (() => {
   function _updateHeroFromDash(dash, dog) {
     const heroBox = _container.querySelector('#wc-hero-box');
     if (!heroBox) return;
-    const photoUrl  = dash?.random_photo?.url;
+    const photoUrl  = dash?.random_photo?.preview_url || dash?.random_photo?.url;
     const avatarUrl = dog?.foto_url;
     const dogName   = dog ? UI.escape(dog.name) : 'Dein Hund';
     const dogRasse  = dog?.rasse ? UI.escape(dog.rasse) : '';
diff --git a/backend/static/sw.js b/backend/static/sw.js
index a973334..8b752dc 100644
--- a/backend/static/sw.js
+++ b/backend/static/sw.js
@@ -3,7 +3,7 @@
    Offline-Cache + Push Notifications + Tile-Cache
    ============================================================ */
 
-const CACHE_VERSION = 'by-v482';
+const CACHE_VERSION = 'by-v483';
 const CACHE_STATIC  = `${CACHE_VERSION}-static`;
 const CACHE_TILES   = 'ban-yaro-tiles-v1';  // bleibt über SW-Updates erhalten