Simplify UI and add batch build endpoint

Dockerfile

@@ -0,0 +1,20 @@
+FROM node:20-alpine AS frontend-build
+WORKDIR /app
+ARG VITE_API_BASE=
+ENV VITE_API_BASE=$VITE_API_BASE
+COPY frontend/package.json frontend/package-lock.json ./
+RUN npm ci
+COPY frontend/ ./
+RUN npm run build
+
+FROM python:3.11-slim AS runtime
+WORKDIR /app
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+ENV STATIC_DIR=/app/static
+COPY backend/requirements.txt ./
+RUN pip install --no-cache-dir -r requirements.txt
+COPY backend/ ./backend/
+COPY --from=frontend-build /app/dist/ ./static/
+EXPOSE 8002
+CMD ["python", "-m", "uvicorn", "backend.app.main:app", "--host", "0.0.0.0", "--port", "8002"]