feat(admin): reorder handelingen with up/down arrows

apps/admin/src/api/activities.ts

@@ -47,3 +47,17 @@ export function useDeleteActivity() {
     },
   });
 }
+
+export function useReorderActivities() {
+  const queryClient = useQueryClient();
+  return useMutation({
+    mutationFn: (ids: number[]) =>
+      apiFetch<Activity[]>('/api/activities/reorder', {
+        method: 'PUT',
+        body: JSON.stringify({ ids }),
+      }),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['activities'] });
+    },
+  });
+}

apps/admin/src/screens/Activities.test.tsx

@@ -13,8 +13,27 @@ vi.mock('../lib/api', () => ({
 const mockApiFetch = vi.mocked(apiFetch);
 
 const existing: Activity[] = [
-  { id: 1, name: 'Frezen', insole_types: ['Kurk', 'Berk'], created_at: '2026-06-17T00:00:00.000Z' },
-  { id: 2, name: 'Lijmen', insole_types: ['3D'], created_at: '2026-06-17T00:00:00.000Z' },
+  {
+    id: 1,
+    name: 'Frezen',
+    insole_types: ['Kurk', 'Berk'],
+    created_at: '2026-06-17T00:00:00.000Z',
+    sort_order: 0,
+  },
+  {
+    id: 2,
+    name: 'Lijmen',
+    insole_types: ['3D'],
+    created_at: '2026-06-17T00:00:00.000Z',
+    sort_order: 1,
+  },
+  {
+    id: 3,
+    name: 'Polijsten',
+    insole_types: ['Kurk'],
+    created_at: '2026-06-17T00:00:00.000Z',
+    sort_order: 2,
+  },
 ];
 
 function renderActivities() {
@@ -103,4 +122,45 @@ describe('Activities', () => {
 
     expect(mockApiFetch).not.toHaveBeenCalledWith('/api/activities/1', { method: 'DELETE' });
   });
+
+  it('moving the second row up PUTs /api/activities/reorder with the swapped ids', async () => {
+    const user = userEvent.setup();
+    renderActivities();
+    await screen.findByText('Lijmen');
+
+    await user.click(screen.getByRole('button', { name: 'Verplaats Lijmen omhoog' }));
+
+    await waitFor(() => {
+      expect(mockApiFetch).toHaveBeenCalledWith('/api/activities/reorder', {
+        method: 'PUT',
+        body: JSON.stringify({ ids: [2, 1, 3] }),
+      });
+    });
+  });
+
+  it('moving the second row down PUTs /api/activities/reorder with the swapped ids', async () => {
+    const user = userEvent.setup();
+    renderActivities();
+    await screen.findByText('Lijmen');
+
+    await user.click(screen.getByRole('button', { name: 'Verplaats Lijmen omlaag' }));
+
+    await waitFor(() => {
+      expect(mockApiFetch).toHaveBeenCalledWith('/api/activities/reorder', {
+        method: 'PUT',
+        body: JSON.stringify({ ids: [1, 3, 2] }),
+      });
+    });
+  });
+
+  it('disables up on the first row and down on the last row', async () => {
+    renderActivities();
+    await screen.findByText('Frezen');
+
+    expect(screen.getByRole('button', { name: 'Verplaats Frezen omhoog' })).toBeDisabled();
+    expect(screen.getByRole('button', { name: 'Verplaats Polijsten omlaag' })).toBeDisabled();
+    // The opposite ends are enabled.
+    expect(screen.getByRole('button', { name: 'Verplaats Frezen omlaag' })).toBeEnabled();
+    expect(screen.getByRole('button', { name: 'Verplaats Polijsten omhoog' })).toBeEnabled();
+  });
 });

apps/admin/src/screens/Activities.tsx

@@ -4,6 +4,7 @@ import {
   useActivities,
   useCreateActivity,
   useDeleteActivity,
+  useReorderActivities,
   useUpdateActivity,
 } from '../api/activities';
 
@@ -71,6 +72,7 @@ export default function Activities() {
   const createActivity = useCreateActivity();
   const updateActivity = useUpdateActivity();
   const deleteActivity = useDeleteActivity();
+  const reorderActivities = useReorderActivities();
 
   // Add form state.
   const [newName, setNewName] = useState('');
@@ -127,6 +129,14 @@ export default function Activities() {
     if (ok) deleteActivity.mutate(id);
   }
 
+  function handleMove(index: number, direction: -1 | 1) {
+    const target = index + direction;
+    if (target < 0 || target >= activities.length) return;
+    const ids = activities.map((a) => a.id);
+    [ids[index], ids[target]] = [ids[target], ids[index]];
+    reorderActivities.mutate(ids);
+  }
+
   return (
     <div className="screen">
       <h1 className="screen-title">Handelingen</h1>
@@ -164,7 +174,7 @@ export default function Activities() {
         <p className="muted">Nog geen stappen. Voeg er een toe hierboven.</p>
       ) : (
         <ul className="activity-list">
-          {activities.map((activity) => (
+          {activities.map((activity, index) => (
             <li key={activity.id} className="activity-card">
               {editingId === activity.id ? (
                 <>
@@ -202,6 +212,24 @@ export default function Activities() {
                   <div className="activity-row">
                     <span className="activity-name">{activity.name}</span>
                     <div className="row-actions">
+                      <button
+                        type="button"
+                        className="icon-btn icon-move"
+                        aria-label={`Verplaats ${activity.name} omhoog`}
+                        disabled={index === 0 || reorderActivities.isPending}
+                        onClick={() => handleMove(index, -1)}
+                      >
+                        ↑
+                      </button>
+                      <button
+                        type="button"
+                        className="icon-btn icon-move"
+                        aria-label={`Verplaats ${activity.name} omlaag`}
+                        disabled={index === activities.length - 1 || reorderActivities.isPending}
+                        onClick={() => handleMove(index, 1)}
+                      >
+                        ↓
+                      </button>
                       <button
                         type="button"
                         className="icon-btn icon-edit"