fix: restore server XLS roster conversion

Dockerfile

@@ -13,7 +13,7 @@ FROM node:22-bookworm-slim AS runtime
 ENV NODE_ENV=production
 WORKDIR /app
 RUN apt-get update \
-  && apt-get install --no-install-recommends -y libreoffice-writer fonts-noto-cjk \
+  && apt-get install --no-install-recommends -y libreoffice-calc libreoffice-writer fonts-noto-cjk \
   && rm -rf /var/lib/apt/lists/*
 COPY package*.json ./
 RUN npm ci --omit=dev --no-audit --no-fund