fix api integration quality baseline

app/ha/client.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import logging
 from dataclasses import dataclass
+from typing import Any
 
 import requests
 
@@ -24,10 +25,14 @@ class HaClient:
             "Content-Type": "application/json",
         })
 
-    def list_entities(self) -> list[dict[str, object]]:
+    def list_entities(self) -> list[dict[str, Any]]:
         response = self._session.get(
             f"{self._settings.url}/api/states",
             timeout=self._settings.timeout_seconds,
         )
         response.raise_for_status()
-        return response.json()
+        payload = response.json()
+        if not isinstance(payload, list):
+            msg = "Home Assistant states response must be a list."
+            raise TypeError(msg)
+        return payload