🚀 Fix: Correct user role value from manager to accountant to match DB enum

frontend/src/pages/staff/StaffPage.tsx

@@ -19,7 +19,7 @@ export const StaffPage = () => {
     const [name, setName] = useState('');
     const [email, setEmail] = useState('');
     const [password, setPassword] = useState('');
-    const [role, setRole] = useState('manager');
+    const [role, setRole] = useState('accountant');
     const [isSubmitting, setIsSubmitting] = useState(false);
 
     const fetchStaff = async () => {
@@ -237,7 +237,7 @@ export const StaffPage = () => {
                                         onChange={e => setRole(e.target.value)}
                                         className="w-full bg-slate-800 border border-slate-700 rounded-xl px-4 py-3 outline-none focus:border-emerald-500/50 transition-all text-white appearance-none cursor-pointer"
                                     >
-                                        <option value="manager">محاسب (عرض ومعالجة)</option>
+                                        <option value="accountant">محاسب (عرض ومعالجة)</option>
                                         <option value="admin">مدير نظام (صلاحيات كاملة)</option>
                                     </select>
                                 </div>