Harden lease lifecycle durability

web/Dockerfile

@@ -7,5 +7,8 @@ RUN npm run build
 
 FROM nginx:1.27-alpine
 COPY nginx.conf.template /etc/nginx/templates/default.conf.template
-COPY --from=build /src/dist/ /usr/share/nginx/html/
+# vite.config.ts deliberately emits into the Go embed directory so the API
+# and standalone browser image use the same compiled application. Copy that
+# fresh build, not the stale source-tree web/dist fallback.
+COPY --from=build /internal/webui/assets/ /usr/share/nginx/html/
 EXPOSE 8080