fix: replace Progress component with plain Box bar + use npm ci in Docker

- DocumentTranslator: replace Chakra Progress (broken types in 2.2.1
  with fresh installs) with a simple Box-based progress bar — no type
  issues, same visual result
- Dockerfile: switch from npm install to npm ci so Docker uses exact
  locked versions from package-lock.json, preventing type discrepancies
  between local and Docker builds

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

Dockerfile

@@ -5,7 +5,8 @@ WORKDIR /app
 COPY package.json package-lock.json* ./
 # Skip Cypress binary download — not needed in production
 ENV CYPRESS_INSTALL_BINARY=0
-RUN npm install --legacy-peer-deps
+# Use ci to install exact versions from package-lock.json
+RUN npm ci --legacy-peer-deps
 
 # ── Stage 2: build the Next.js app ──────────────────────────────────────────
 FROM node:lts-alpine AS builder