- electron/database.cjs: migration v4 (workflows + workflow_executions表) + CRUD函数
- electron/workflow-engine.cjs: 引擎核心 — executeStep支持5种步骤类型
   (ai_call/tool_call/condition/transform/db_action) + 模板插值
- electron/ipc.cjs: 6个workflow IPC handler (list/get/save/delete/execute/executions)
- electron/preload.cjs: workflow API暴露给渲染进程
- src/pages/Workflows.tsx: 管理页面 — CRUD+执行+历史+JSON编辑器
- src/pages/AppEcosystem.tsx: 侧栏添加「工作流」tab
- 内置3个模板: 需求分析/文档总结/周报生成

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>