chore: migrate frontend package manager from npm to pnpm

vite-frontend/Dockerfile

@@ -3,11 +3,11 @@ FROM node:20.19.0 AS builder
 
 WORKDIR /app
 
-COPY package*.json ./
-RUN npm install --legacy-peer-deps
+COPY package.json pnpm-lock.yaml* ./
+RUN corepack enable pnpm && pnpm install --frozen-lockfile
 
 COPY . .
-RUN npm run build
+RUN pnpm run build
 
 # 生产阶段
 FROM nginx:stable-alpine AS production-stage