[34588f42] Chore: Build-Artefakte und UI-Struktur-Fixes

- Frontend Produktions-Build aktualisiert.
- Syntax-Fehler in App.tsx korrigiert und Tabs-Layout stabilisiert.

fotograf-de-scraper/backend/database.py

@@ -42,6 +42,13 @@ class ReleaseParticipant(Base):
     first_name = Column(String)
     last_updated = Column(DateTime, default=datetime.datetime.utcnow, onupdate=datetime.datetime.utcnow)
 
+class ReleaseHistory(Base):
+    __tablename__ = "release_history"
+    id = Column(Integer, primary_key=True)
+    timestamp = Column(DateTime, default=datetime.datetime.utcnow)
+    recipient_count = Column(Integer)
+    scheduled_time = Column(String, nullable=True)
+
 Base.metadata.create_all(bind=engine)
 
 def get_db():