fix(chats): resolve saved chat detail 500 by importing ChatMemberRead

tests/test_chat_message_flow.py

@@ -135,6 +135,28 @@ async def test_delete_saved_messages_chat_clears_messages_but_keeps_chat(client,
     assert messages_after_delete.json() == []
 
 
+async def test_saved_messages_chat_detail_returns_200(client, db_session):
+    user = await _create_verified_user(
+        client,
+        db_session,
+        "saved_detail_user@example.com",
+        "saved_detail_user",
+        "strongpass123",
+    )
+    auth = {"Authorization": f"Bearer {user['access_token']}"}
+
+    saved_chat_response = await client.get("/api/v1/chats/saved", headers=auth)
+    assert saved_chat_response.status_code == 200
+    saved_chat_id = saved_chat_response.json()["id"]
+
+    detail_response = await client.get(f"/api/v1/chats/{saved_chat_id}", headers=auth)
+    assert detail_response.status_code == 200
+    payload = detail_response.json()
+    assert payload["id"] == saved_chat_id
+    assert payload["is_saved"] is True
+    assert isinstance(payload["members"], list)
+
+
 async def test_chat_list_hides_duplicate_saved_chats_and_returns_single_saved_entry(client, db_session):
     user = await _create_verified_user(
         client,