fix: stabilize Polygon config loading and sync

site/from_stands.py

@@ -309,6 +309,7 @@ def main():
 
     converted = 0
     errors = 0
+    converted_names = set()
 
     for fname in yaml_files:
         src = os.path.join(stands_dir, fname)
@@ -328,6 +329,7 @@ def main():
                     sort_keys=False,
                     width=200,
                 )
+            converted_names.add(fname)
 
             # Быстрая проверка результата
             svc_name = cfg.get("name", "?")
@@ -343,6 +345,16 @@ def main():
             print(f"  FAIL {fname}: {e}")
             errors += 1
 
+    if errors == 0:
+        stale_yaml = sorted(
+            fname
+            for fname in os.listdir(services_dir)
+            if fname.lower().endswith(YAML_EXTS) and fname not in converted_names
+        )
+        for fname in stale_yaml:
+            os.remove(os.path.join(services_dir, fname))
+            print(f"  REMOVE {fname}: not present in source")
+
     print()
     print(f"Done: {converted} converted, {errors} errors")