Закрыты задачи бэклога по неочевидному поведению UI при ошибках отправки сообщений и блокировках со стороны Message-safety + добалено ограничение на размер сообщения

codebase/backend/api-backend/tests/unit/test_cli_settings.py

@@ -16,6 +16,7 @@ def test_production_like_seed_contains_all_mandatory_settings() -> None:
     assert values["otp.phone.code_length"] == "6"
     assert values["otp.phone.ttl_seconds"] == "60"
     assert values["otp.phone.sms_order_timeout_ms"] == "3000"
+    assert values["chat.message.max_length"] == "4000"
 
 
 def test_seed_rejects_invalid_typed_value(tmp_path: Path) -> None:
@@ -62,3 +63,16 @@ def test_seed_rejects_public_otp_setting(tmp_path: Path) -> None:
 
     with pytest.raises(ValueError, match="must not be public"):
         load_seed(path)
+
+
+@pytest.mark.parametrize("value", [0, 10001])
+def test_seed_rejects_invalid_chat_message_max_length(tmp_path: Path, value: int) -> None:
+    path = tmp_path / "settings.yaml"
+    path.write_text(
+        "schema_version: 1\nsettings:\n"
+        f"  chat.message.max_length: {{type: integer, value: {value}, public: true}}\n",
+        encoding="utf-8",
+    )
+
+    with pytest.raises(ValueError, match="value must be between 1 and 10000"):
+        load_seed(path)