Feature: Wurf-Buchstabe (A–Z) + Wurf-Name — DB, Backend, Formular, Kartenanzeige (SW by-v912)

backend/database.py

@@ -1353,6 +1353,13 @@ def _migrate(conn_factory):
             );
             CREATE INDEX IF NOT EXISTS idx_litters_breeder ON litters(breeder_id, created_at DESC);
             CREATE INDEX IF NOT EXISTS idx_litters_status  ON litters(status, sichtbar);
+            # wurf_rang + wurf_name Spalten nachrüsten
+            try:
+                conn.execute("ALTER TABLE litters ADD COLUMN wurf_rang TEXT")
+            except Exception: pass
+            try:
+                conn.execute("ALTER TABLE litters ADD COLUMN wurf_name TEXT")
+            except Exception: pass
 
             CREATE TABLE IF NOT EXISTS puppies (
                 id              INTEGER PRIMARY KEY AUTOINCREMENT,