Feat: Rechnungsadresse — Profil, Upgrade-Modal Hinweis, Rechnung-erstellen-Button in Upgrade-Cards (SW by-v967)

backend/database.py

@@ -2444,6 +2444,12 @@ def _migrate(conn_factory):
         except Exception as e:
             logger.warning(f"Migration invoices: {e}")
 
+        try:
+            conn.execute("ALTER TABLE users ADD COLUMN billing_address TEXT")
+            logger.info("Migration: billing_address bereit.")
+        except Exception:
+            pass
+
 
 def _seed_help_articles(conn):
     """Befüllt help_articles mit Starter-FAQs — nur wenn die Tabelle noch leer ist."""