Voeg loading-skeleton toe voor pakketten-sectie

Toont 3 pulserende placeholder-kaarten (zelfde afmetingen/structuur als
PackageCard) zolang de offerings-fetch nog bezig is, zodat de sectie
niet leeg oogt en de layout niet verspringt zodra de echte data binnenkomt.

src/features/landing/__tests__/PackagesSection.test.tsx

@@ -40,10 +40,11 @@ describe('PackagesSection', () => {
     renderWithQueryClient();
 
     await waitFor(() => {
-      expect(screen.getByTestId('packages-grid').children.length).toBe(packages.length);
+      expect(screen.queryByTestId('package-card-skeleton')).not.toBeInTheDocument();
     });
 
     expect(fetch).toHaveBeenCalledWith('/api/v1/offerings');
+    expect(screen.getByTestId('packages-grid').children.length).toBe(packages.length);
     for (const pkg of packages) {
       expect(screen.getByTestId(`package-card-${pkg.id}`)).toBeInTheDocument();
       expect(screen.getByText(pkg.title)).toBeInTheDocument();
@@ -60,6 +61,29 @@ describe('PackagesSection', () => {
     });
   });
 
+  it('shows skeleton placeholders while the request is in flight, reserving the grid space', async () => {
+    let resolveFetch: (response: Response) => void;
+    vi.stubGlobal(
+      'fetch',
+      vi.fn().mockReturnValue(
+        new Promise<Response>((resolve) => {
+          resolveFetch = resolve;
+        }),
+      ),
+    );
+
+    renderWithQueryClient();
+
+    expect(screen.getAllByTestId('package-card-skeleton')).toHaveLength(packages.length);
+
+    resolveFetch!(new Response(JSON.stringify(packages), { status: 200 }));
+
+    await waitFor(() => {
+      expect(screen.queryAllByTestId('package-card-skeleton')).toHaveLength(0);
+    });
+    expect(screen.getByTestId('packages-grid').children.length).toBe(packages.length);
+  });
+
   it('shows an error message when the API request fails', async () => {
     mockFetchOnce(new Response(null, { status: 500, statusText: 'Internal Server Error' }));
 

src/features/landing/components/PackageCardSkeleton.tsx

@@ -0,0 +1,26 @@
+// Mirrors PackageCard's structure/spacing 1-to-1 so the grid doesn't reflow once
+// real data arrives — only the content becomes pulsing placeholder blocks.
+export function PackageCardSkeleton() {
+  return (
+    <div
+      className="flex animate-pulse flex-col rounded border border-line bg-surface p-8"
+      data-testid="package-card-skeleton"
+      aria-hidden="true"
+    >
+      <div className="mb-3.5 h-[0.78rem] w-16 rounded bg-line" />
+      <div className="mb-2.5 h-6 w-3/4 rounded bg-line" />
+      <div className="mb-6 space-y-2">
+        <div className="h-4 w-full rounded bg-line" />
+        <div className="h-4 w-2/3 rounded bg-line" />
+      </div>
+      <div className="mb-1 h-8 w-24 rounded bg-line" />
+      <div className="mb-6 h-[0.78rem] w-28 rounded bg-line" />
+      <ul className="my-6 flex-1 list-none space-y-2.5">
+        {[1, 2, 3, 4].map((i) => (
+          <li key={i} className="h-4 w-full rounded bg-line" />
+        ))}
+      </ul>
+      <div className="h-[3.4rem] w-full rounded-lg bg-line" />
+    </div>
+  );
+}

src/features/landing/components/PackagesSection.tsx

@@ -1,5 +1,10 @@
 import { usePackagesQuery } from '../hooks/usePackagesQuery';
 import { PackageCard } from './PackageCard';
+import { PackageCardSkeleton } from './PackageCardSkeleton';
+
+// Matches the fixed number of packages (see content.ts) so the skeleton grid has the
+// same shape as the loaded grid — no layout shift once the real cards arrive.
+const SKELETON_COUNT = 3;
 
 export function PackagesSection() {
   const { data: packages, isLoading, isError } = usePackagesQuery();
@@ -27,7 +32,9 @@ export function PackagesSection() {
             <p className="col-span-full text-center text-muted" data-testid="packages-error">
               Pakketten konden niet worden geladen. Probeer het later opnieuw.
             </p>
-          ) : isLoading || !packages ? null : (
+          ) : isLoading || !packages ? (
+            Array.from({ length: SKELETON_COUNT }, (_, i) => <PackageCardSkeleton key={i} />)
+          ) : (
             packages.map((pkg) => <PackageCard key={pkg.id} pkg={pkg} />)
           )}
         </div>