节点验证。

frontend/src/pages/Workflow/Definition/Designer/components/Toolbar/index.tsx

@@ -308,12 +308,22 @@ const Toolbar: React.FC<ToolbarProps> = ({ graph }) => {
                     </Tooltip>
                 </Space>
                 <Space>
-                    <Tooltip title="验证流程">
+                    <Tooltip title="验证流程图是否符合规范">
                         <Button 
                             icon={<CheckCircleOutlined />} 
                             onClick={validateWorkflow}
                             type="primary"
-                        />
+                            size="middle"
+                            style={{
+                                backgroundColor: '#52c41a',
+                                borderColor: '#52c41a',
+                                fontWeight: 500,
+                                boxShadow: '0 2px 0 rgba(82, 196, 26, 0.1)',
+                                marginLeft: 8
+                            }}
+                        >
+                            验证流程
+                        </Button>
                     </Tooltip>
                 </Space>
             </Space>