Fix rose-ash test Dockerfile: copy sxc directory

The test app's bp/dashboard/routes.py imports from sxc.pages.renders
but the Dockerfile wasn't copying the sxc directory into the image.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

test/Dockerfile

@@ -28,6 +28,7 @@ COPY test/ ./test-app-tmp/
 RUN cp -r test-app-tmp/app.py test-app-tmp/path_setup.py \
          test-app-tmp/bp test-app-tmp/sx test-app-tmp/services \
          test-app-tmp/runner.py test-app-tmp/__init__.py ./ 2>/dev/null || true && \
+    ([ -d test-app-tmp/sxc ] && cp -r test-app-tmp/sxc ./ || true) && \
     rm -rf test-app-tmp
 
 # Sibling models for cross-domain SQLAlchemy imports