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/src/lib/llm-service.ts

@@ -14,6 +14,8 @@
  * Part of ZCLAW L4 Self-Evolution capability.
  */
 
+import { DEFAULT_MODEL_ID, DEFAULT_OPENAI_BASE_URL } from '../constants/models';
+
 // === Types ===
 
 export type LLMProvider = 'openai' | 'volcengine' | 'gateway' | 'mock';
@@ -54,8 +56,8 @@ export interface LLMServiceAdapter {
 const DEFAULT_CONFIGS: Record<LLMProvider, LLMConfig> = {
   openai: {
     provider: 'openai',
-    model: 'gpt-4o-mini',
-    apiBase: 'https://api.openai.com/v1',
+    model: DEFAULT_MODEL_ID,
+    apiBase: DEFAULT_OPENAI_BASE_URL,
     maxTokens: 2000,
     temperature: 0.7,
     timeout: 30000,