improvement: a flow added for owner users to make it possible for them to participate in treatments or tasks.

frontend/src/components/staff/StaffWorkingHoursStep.tsx

@@ -1,6 +1,6 @@
 'use client';
 
-import { useEffect, useState } from 'react';
+import { useCallback, useEffect, useState } from 'react';
 import { useTranslations } from 'next-intl';
 import { WorkingHoursEditor } from '@/components/staff/WorkingHoursEditor';
 import {
@@ -87,6 +87,12 @@ export function useWorkingHoursForm(initial?: {
   const [autoRepeatWeekly, setAutoRepeatWeekly] = useState(initial?.autoRepeatWeekly ?? true);
   const [validationError, setValidationError] = useState<string | null>(null);
 
+  const reset = useCallback((next?: { days: WorkingHoursEditorDay[]; autoRepeatWeekly: boolean }) => {
+    setDays(next?.days ?? emptyWorkingHoursEditorDays());
+    setAutoRepeatWeekly(next?.autoRepeatWeekly ?? true);
+    setValidationError(null);
+  }, []);
+
   return {
     days,
     setDays,
@@ -94,10 +100,6 @@ export function useWorkingHoursForm(initial?: {
     setAutoRepeatWeekly,
     validationError,
     setValidationError,
-    reset(next?: { days: WorkingHoursEditorDay[]; autoRepeatWeekly: boolean }) {
-      setDays(next?.days ?? emptyWorkingHoursEditorDays());
-      setAutoRepeatWeekly(next?.autoRepeatWeekly ?? true);
-      setValidationError(null);
-    },
+    reset,
   };
 }