Separate bootstrap settings from runtime overrides with a dedicated runtime settings manager

backend/tests/test_main.py

@@ -288,10 +288,12 @@ async def test_startup_overrides_settings_from_persisted_setup(tmp_path: Path) -
         patch("app.tasks.history_sync.register"),
     ):
         async with _lifespan(app):
-            assert app.state.settings.database_path == runtime_db_path
-            assert app.state.settings.fail2ban_socket == "/tmp/persisted.sock"
-            assert app.state.settings.timezone == "Europe/Berlin"
-            assert app.state.settings.session_duration_minutes == 123
+            assert app.state.runtime_settings is not None
+            assert app.state.runtime_settings.database_path == runtime_db_path
+            assert app.state.runtime_settings.fail2ban_socket == "/tmp/persisted.sock"
+            assert app.state.runtime_settings.timezone == "Europe/Berlin"
+            assert app.state.runtime_settings.session_duration_minutes == 123
+            assert app.state.settings.database_path == str(tmp_path / "pointer.db")
             assert Path(runtime_db_path).exists()