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/components/IdentityChangeProposal.tsx

@@ -30,6 +30,30 @@ import {
 import { useChatStore } from '../store/chatStore';
 import { Button, Badge } from './ui';
 
+// === Error Parsing Utility ===
+
+type ProposalOperation = 'approval' | 'rejection' | 'restore';
+
+function parseProposalError(err: unknown, operation: ProposalOperation): string {
+  const errorMessage = err instanceof Error ? err.message : String(err);
+
+  if (errorMessage.includes('not found') || errorMessage.includes('不存在')) {
+    return '提案不存在或已被处理，请刷新页面';
+  }
+  if (errorMessage.includes('not pending') || errorMessage.includes('已处理')) {
+    return '该提案已被处理，请刷新页面';
+  }
+  if (errorMessage.includes('network') || errorMessage.includes('fetch') || errorMessage.includes('网络')) {
+    return '网络连接失败，请检查网络后重试';
+  }
+  if (errorMessage.includes('timeout') || errorMessage.includes('超时')) {
+    return '操作超时，请重试';
+  }
+
+  const operationName = operation === 'approval' ? '审批' : operation === 'rejection' ? '拒绝' : '恢复';
+  return `${operationName}失败: ${errorMessage}`;
+}
+
 // === Diff View Component ===
 
 function DiffView({
@@ -331,8 +355,7 @@ export function IdentityChangeProposalPanel() {
       setSnapshots(agentSnapshots);
     } catch (err) {
       console.error('[IdentityChangeProposal] Failed to approve:', err);
-      const message = err instanceof Error ? err.message : '审批失败，请重试';
-      setError(`审批失败: ${message}`);
+      setError(parseProposalError(err, 'approval'));
     } finally {
       setProcessingId(null);
     }
@@ -349,8 +372,7 @@ export function IdentityChangeProposalPanel() {
       setProposals(pendingProposals);
     } catch (err) {
       console.error('[IdentityChangeProposal] Failed to reject:', err);
-      const message = err instanceof Error ? err.message : '拒绝失败，请重试';
-      setError(`拒绝失败: ${message}`);
+      setError(parseProposalError(err, 'rejection'));
     } finally {
       setProcessingId(null);
     }
@@ -367,8 +389,7 @@ export function IdentityChangeProposalPanel() {
       setSnapshots(agentSnapshots);
     } catch (err) {
       console.error('[IdentityChangeProposal] Failed to restore:', err);
-      const message = err instanceof Error ? err.message : '恢复失败，请重试';
-      setError(`恢复失败: ${message}`);
+      setError(parseProposalError(err, 'restore'));
     } finally {
       setProcessingId(null);
     }