feat: patrol on-device integration smoke test

pubspec.yaml

@@ -12,6 +12,7 @@ dependencies:
   flutter:
     sdk: flutter
   crypto: ^3.0.3
+  ffi: ^2.1.0
   hive: ^2.2.3
   hive_flutter: ^1.1.0
   auto_route: ">=11.1.0 <11.2.0"
@@ -24,12 +25,25 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
+  integration_test:
+    sdk: flutter
+  patrol: ^4.10.0
   build_runner: ^2.4.6
   flutter_lints: ^6.0.0
   auto_route_generator: ^10.5.0
   flutter_native_splash: ^2.3.4
   flutter_launcher_icons: ^0.14.4
 
+# patrol test reads this block; android.package_name is the flavored
+# applicationId (the integration flavor adds the .integration suffix), and
+# patrol_cli refuses to run without it.
+patrol:
+  app_name: kirakira
+  flavor: integration
+  test_directory: integration_test
+  android:
+    package_name: com.app.smol_mail.integration
+
 flutter_launcher_icons:
   android: "launcher_icon"
   ios: false