fix(docker): include install.html and wizard vendor assets in prod image

Dockerfile.prod

@@ -27,6 +27,13 @@ RUN pip install --no-cache-dir -r requirements.txt
 COPY server/ ./server/
 COPY web/agent/ ./web/agent/
 COPY --from=frontend /build/web/app ./web/app/
+# Install wizard (Alpine + Tailwind static page; not part of Vite build)
+COPY web/app/install.html ./web/app/install.html
+COPY web/app/vendor/tailwindcss-browser.js \
+     web/app/vendor/theme-init.js \
+     web/app/vendor/theme.css \
+     web/app/vendor/alpinejs.min.js \
+     ./web/app/vendor/
 COPY docker/entrypoint.sh ./docker/entrypoint.sh
 RUN chmod +x ./docker/entrypoint.sh