refactor: 删除版本更新功能 + 报表页自动刷新

删除版本与更新功能:
- routes/admin_api/update.py: 删除整个文件
- routes/admin_api/__init__.py: 移除 update 模块注册
- admin-frontend/src/pages/SystemPage.vue: 移除版本更新UI区块
- admin-frontend/src/api/update.js: 删除整个文件
- 删除 static/admin/assets/update-*.js

报表页自动刷新:
- admin-frontend/src/pages/ReportPage.vue: 添加 setInterval 每1秒刷新
- 在 onMounted 启动定时器，onUnmounted 清除
- 覆盖统计数据、运行中任务、系统信息等所有动态数据

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

routes/admin_api/__init__.py

@@ -8,7 +8,6 @@ admin_api_bp = Blueprint("admin_api", __name__, url_prefix="/yuyx/api")
 
 # Import side effects: register routes on blueprint
 from routes.admin_api import core as _core  # noqa: F401
-from routes.admin_api import update as _update  # noqa: F401
 
 # Export security blueprint for app registration
 from routes.admin_api.security import security_bp  # noqa: F401