fix: normalize host runtime service endpoints

backend/tests/test_config_runtime_resolution.py

@@ -0,0 +1,36 @@
+from app import config as config_module
+
+
+def test_settings_normalize_docker_aliases_for_host_runtime(monkeypatch):
+    monkeypatch.setattr(config_module, "_is_running_in_container", lambda: False)
+
+    settings = config_module.Settings(
+        postgres_host="postgres",
+        redis_url="redis://redis:6379/0",
+    )
+
+    assert settings.postgres_host == "localhost"
+    assert settings.redis_url == "redis://localhost:6379/0"
+    assert settings.database_url == "postgresql+asyncpg://hartomat:hartomat@localhost:5432/hartomat"
+
+
+def test_settings_preserve_service_aliases_inside_container(monkeypatch):
+    monkeypatch.setattr(config_module, "_is_running_in_container", lambda: True)
+
+    settings = config_module.Settings(
+        postgres_host="postgres",
+        redis_url="redis://redis:6379/0",
+    )
+
+    assert settings.postgres_host == "postgres"
+    assert settings.redis_url == "redis://redis:6379/0"
+
+
+def test_normalize_service_url_preserves_auth_and_query(monkeypatch):
+    monkeypatch.setattr(config_module, "_is_running_in_container", lambda: False)
+
+    normalized = config_module._normalize_service_url(
+        "redis://user:secret@redis:6380/1?ssl_cert_reqs=none"
+    )
+
+    assert normalized == "redis://user:secret@localhost:6380/1?ssl_cert_reqs=none"