feat(import): resolve color variety ID mappings mismatch, support unnamed parents in virtual litters, and implement SaleContract updates

tools/import/extract.py

@@ -323,9 +323,10 @@ def _reconstruct_parents(animals):
             father = above[-1] if above else None
             mother = below[0] if below else None
             for parent, role in ((father, "father"), (mother, "mother")):
-                if parent and parent["name"]:
+                if parent:
+                    p_name = parent["name"] or "unbekannt"
                     a["parentRefs"].append({
-                        "name": parent["name"],
+                        "name": p_name,
                         "dob": parent["dob"],
                         "roleGuess": role,
                         "method": "chart-position",
@@ -348,7 +349,7 @@ def _attach_photos(z, sheets, animals, fname):
         if not cands:
             # fall back to nearest animal by row across all gens
             cands = animals
-        target = min(cands, key=lambda a: abs(a["_row"] - row)) if cands else None
+        target = min(cands, key=lambda a: abs((a["_row"] - row) - 10)) if cands else None
         if not target:
             continue
         ext = os.path.splitext(media)[1] or ".img"