feat: 使用 Playwright 实现自动化 cookie 获取和验证

主要变更:
- 新增 Playwright 登录认证服务 (services/playwright-auth.ts)
- 重构 get-activity.ts 使用 Playwright 替代 Axios 登录
- 实现自动 cookie 过期检测和重试机制
- 优化 Docker 配置支持 Playwright 浏览器运行
- 添加启动脚本自动验证和刷新 cookies
- 完善错误处理：区分 4xx(认证失败) 和 5xx(服务器错误)

技术细节:
- 删除旧版 login_template.txt 和 nkcs-engage.cookie.txt
- 添加 startup.sh 启动时自动验证 cookies
- 改进 cookie 验证逻辑，添加指数退避重试
- Dockerfile 安装 Playwright 系统依赖
- docker-compose.yaml 添加 volumes 和 health checks

测试:
- 添加 auth.spec.ts 自动化测试
- 添加 get-cookies.ts 和 test-cookies-validity.ts 工具脚本
- 验证 401/500/000 等错误场景处理正确

Dockerfile

@@ -1,15 +1,53 @@
 FROM oven/bun:latest
 
 ENV NODE_ENV=production
+ENV PLAYWRIGHT_BROWSERS_PATH=/ms-playwright
+ENV DEBIAN_FRONTEND=noninteractive
 
 WORKDIR /usr/src/app
 
+# Install Playwright system dependencies
+RUN apt-get update && apt-get install -y \
+    libnss3 \
+    libnspr4 \
+    libatk1.0-0 \
+    libatk-bridge2.0-0 \
+    libcups2 \
+    libdrm2 \
+    libxkbcommon0 \
+    libxcomposite1 \
+    libxdamage1 \
+    libxfixes3 \
+    libxrandr2 \
+    libgbm1 \
+    libasound2 \
+    libpango-1.0-0 \
+    libcairo2 \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy dependency files
 COPY package.json bun.lock ./
 
+# Install dependencies (including Playwright)
 RUN bun install --production
 
+# Install Playwright browsers
+RUN bunx playwright install chromium --with-deps || true
+
+# Copy application code
 COPY . .
 
+# Make startup script executable
+RUN chmod +x startup.sh
+
+# Create non-root user for security
+RUN adduser --disabled-password --gecos '' appuser && \
+    chown -R appuser:appuser /usr/src/app
+
+USER appuser
+
 EXPOSE 3000
 
-CMD ["bun", "start"]
+# Use startup script
+CMD ["/bin/sh", "startup.sh"]