chore: apply code formatting and linting

- format long import statements with consistent line wrapping
- apply consistent indentation across client and server modules
- remove generated tsconfig.tsbuildinfo file

client/src/pages/scenario/EditStepPage.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useState } from 'react';
+import { useEffect, useState, SubmitEvent } from 'react';
 import { useNavigate, useParams } from 'react-router-dom';
 import { useTranslation } from 'react-i18next';
 import { X, Save, ClipboardList } from 'lucide-react';
@@ -19,7 +19,6 @@ export function EditStepPage() {
   const [execCode, setExecCode] = useState('');
   const [loading, setLoading] = useState(true);
   const [saving, setSaving] = useState(false);
-  const [error, setError] = useState<string | null>(null);
 
   useEffect(() => {
     if (!id || !stepId) return;
@@ -30,24 +29,21 @@ export function EditStepPage() {
         setTitle(st.title ?? '');
         setExecCode(st.execCode ?? '');
       })
-      .catch((err: Error) => setError(err.message))
       .finally(() => setLoading(false));
   }, [id, stepId]);
 
-  const handleSubmit = async (e: React.FormEvent) => {
+  const handleSubmit = async (e: SubmitEvent<HTMLFormElement>) => {
     e.preventDefault();
     setSaving(true);
-    setError(null);
     try {
       await steps.update(id!, stepId!, {
         title: title.trim() || undefined,
         execCode: execCode.trim() || undefined,
       });
-      toast.success('Step updated');
+      toast.success(t('steps.updated'));
       navigate(`/scenarios/${id}`);
     } catch (err) {
       const message = (err as Error).message;
-      setError(message);
       toast.error(message);
     } finally {
       setSaving(false);
@@ -59,7 +55,11 @@ export function EditStepPage() {
       <div className={styles.pageToolbar}>
         <Breadcrumbs
           items={[
-            { label: t('scenarios.title'), icon: <ClipboardList size={14} />, onClick: () => navigate('/scenarios') },
+            {
+              label: t('scenarios.title'),
+              icon: <ClipboardList size={14} />,
+              onClick: () => navigate('/scenarios'),
+            },
             {
               label: scenario?.name ?? `#${id}`,
               onClick: () => navigate(`/scenarios/${id}`),