feat: 新增技能编排引擎和工作流构建器组件

refactor: 统一Hands系统常量到单个源文件
refactor: 更新Hands中文名称和描述

fix: 修复技能市场在连接状态变化时重新加载
fix: 修复身份变更提案的错误处理逻辑

docs: 更新多个功能文档的验证状态和实现位置
docs: 更新Hands系统文档

test: 添加测试文件验证工作区路径

desktop/package.json

@@ -31,10 +31,13 @@
     "typecheck": "tsc --noEmit"
   },
   "dependencies": {
+    "@dagrejs/dagre": "^3.0.0",
     "@tauri-apps/api": "^2",
     "@tauri-apps/plugin-opener": "^2",
     "@xstate/react": "^6.1.0",
+    "@xyflow/react": "^12.10.1",
     "clsx": "^2.1.1",
+    "dagre": "^0.8.5",
     "date-fns": "^4.1.0",
     "framer-motion": "^12.36.0",
     "lucide-react": "^0.577.0",
@@ -55,6 +58,7 @@
     "@tauri-apps/cli": "^2",
     "@testing-library/jest-dom": "6.6.3",
     "@testing-library/react": "16.1.0",
+    "@types/js-yaml": "^4.0.9",
     "@types/react": "^19.1.8",
     "@types/react-dom": "^19.1.6",
     "@types/react-window": "^2.0.0",