feat: add a hub for the client's own pages and gate mews:do action links

app/test/flutter_test_config.dart

@@ -0,0 +1,11 @@
+import 'dart:async';
+
+import 'package:drift/drift.dart';
+
+/// Each test builds its own in-memory database, which is safe because no two
+/// share an executor, but it trips drift's shared-executor warning and buries
+/// the rest of the output.
+Future<void> testExecutable(FutureOr<void> Function() testMain) async {
+  driftRuntimeOptions.dontWarnAboutMultipleDatabases = true;
+  await testMain();
+}