feat(scenarios): add timeoutSeconds to scenarios and steps

- add timeoutSeconds field to scenario and step entities
- add timeoutSeconds to create/update DTOs for scenario and step
- enforce timeout via scheduler: abort run if step exceeds limit
- expose timeoutSeconds in MCP create/update scenario and step tools
- add client-side type, API, i18n, and form support for timeoutSeconds
- add integration tests for timeout persistence via REST and MCP

client/src/pages/scenario/ScenarioDetailPage.tsx

@@ -288,7 +288,7 @@ export function ScenarioDetailPage() {
         </span>
       ),
     },
-    { key: 'order', header: t('scenarios.step_order'), render: (s) => s.order + 1, width: 60 },
+    { key: 'order', header: t('scenarios.step_order'), render: (s) => s.order, width: 60 },
     {
       key: 'title',
       header: t('scenarios.step_title'),