add-utils-function

Add or modify utility functions in fe-tools. Use when the user asks to add a new utility/helper/validator (e.g., "新增utils函数", "add utility function", "新增SQL语句校验功能") or to extend existing utils in @fe-tools/utils, @fe-tools/web-utils, @fe-tools/node-utils, @fe-tools/canvas-utils, or @fe-tools/ai-utils.