Fix frontend build dependencies

start.sh

@@ -174,7 +174,11 @@ build_frontend() {
     echo ""
     echo -e "${CYAN}构建前端...${NC}"
     if [ -d "frontend" ] && command -v npm >/dev/null 2>&1; then
-        (cd frontend && npm install --legacy-peer-deps && npm run build)
+        if [ -f "frontend/package-lock.json" ]; then
+            (cd frontend && npm ci && npm run build)
+        else
+            (cd frontend && npm install && npm run build)
+        fi
         echo -e "${GREEN}前端构建完成: ${FRONTEND_DIST}${NC}"
     else
         echo -e "${RED}前端构建失败: 需要 npm 和 frontend 目录${NC}"