fix: test cases

backend/src/test/resources/application.properties

@@ -25,3 +25,12 @@ app.post.publish-mode=DIRECT
 
 # Base website URL used in tests
 app.website-url=http://localhost
+
+# Default avatar generator configuration
+app.avatar.style=${AVATAR_STYLE:pixel-art-neutral}
+app.avatar.size=${AVATAR_SIZE:128}
+app.avatar.base-url=${AVATAR_BASE_URL:https://api.dicebear.com/6.x}
+
+# Web push configuration
+app.webpush.public-key=${WEBPUSH_PUBLIC_KEY:}
+app.webpush.private-key=${WEBPUSH_PRIVATE_KEY:}