Remove built-in proxy from deploy scripts and show pip install progress.

Proxy is optional via manual env vars only; update.sh also drops quiet pip/npm flags.

Co-authored-by: Cursor <cursoragent@cursor.com>

deploy/update.sh

@@ -3,6 +3,8 @@ set -euo pipefail
 
 INSTALL_DIR="${INSTALL_DIR:-/opt/secondary-school-grade-archive}"
 BRANCH="${BRANCH:-main}"
+PIP_MIRROR="${PIP_MIRROR:-https://pypi.tuna.tsinghua.edu.cn/simple}"
+NPM_REGISTRY="${NPM_REGISTRY:-https://registry.npmmirror.com}"
 
 GREEN='\033[0;32m'
 NC='\033[0m'
@@ -19,17 +21,18 @@ git pull origin "${BRANCH}"
 log_info "更新后端依赖…"
 cd backend
 source venv/bin/activate
-pip install -r requirements.txt -q
+pip install -r requirements.txt --progress-bar on -i "${PIP_MIRROR}"
 deactivate
 
 log_info "重建前端…"
 cd ../frontend
-npm ci --silent
+npm config set registry "${NPM_REGISTRY}"
+npm ci
 npm run build
 
 log_info "更新网关…"
 cd ../deploy/pm2
-npm ci --silent
+npm ci
 
 log_info "重启 PM2…"
 cd "${INSTALL_DIR}"