feat(student-portal): 完整实现 student-portal 微前端

包含 src 全部实现、Dockerfile、配置文件、contracts 包等

apps/student-portal/Dockerfile

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+# 多阶段构建：student-portal 生产镜像（ai14，P6 硬化）
+# 用法：docker build -t edu/student-portal:latest -f apps/student-portal/Dockerfile .
+# 端口：4001（004 §1.2 强制 4 端 4000-4003）
+
+# ============ Stage 1: 装依赖 ============
+FROM node:22-alpine AS deps
+WORKDIR /app
+
+# 启用 pnpm
+RUN corepack enable && corepack prepare pnpm@9.12.0 --activate
+
+# 先拷依赖清单，利用缓存
+COPY package.json pnpm-lock.yaml* pnpm-workspace.yaml* ./
+COPY apps/student-portal/package.json ./apps/student-portal/
+# 安装依赖（含 devDependencies，构建需要）
+RUN pnpm install --filter @edu/student-portal... --frozen-lockfile || pnpm install --filter @edu/student-portal...
+
+# ============ Stage 2: 构建 ============
+FROM node:22-alpine AS builder
+WORKDIR /app
+
+RUN corepack enable && corepack prepare pnpm@9.12.0 --activate
+
+COPY --from=deps /app/node_modules ./node_modules
+COPY --from=deps /app/apps/student-portal/node_modules ./apps/student-portal/node_modules
+COPY package.json pnpm-lock.yaml* pnpm-workspace.yaml* ./
+COPY apps/student-portal ./apps/student-portal
+
+# 构建生产产物（禁用 telemetry）
+ENV NEXT_TELEMETRY_DISABLED=1
+RUN pnpm --filter @edu/student-portal run build
+
+# ============ Stage 3: 运行时 ============
+FROM node:22-alpine AS runner
+WORKDIR /app
+
+ENV NODE_ENV=production
+ENV NEXT_TELEMETRY_DISABLED=1
+ENV PORT=4001
+
+# 非 root 用户运行
+RUN addgroup -g 1001 -S nodejs && adduser -S nextjs -u 1001
+
+# 拷构建产物与必要清单
+COPY --from=builder /app/apps/student-portal/package.json ./package.json
+COPY --from=builder /app/apps/student-portal/.next ./.next
+COPY --from=builder /app/apps/student-portal/public ./public
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/apps/student-portal/next.config.js ./next.config.js
+
+USER nextjs
+EXPOSE 4001
+
+# 健康检查（liveness）
+HEALTHCHECK --interval=30s --timeout=5s --start-period=20s --retries=3 \
+  CMD wget --quiet --spider http://localhost:4001/api/health || exit 1
+
+CMD ["node_modules/.bin/next", "start", "-p", "4001"]