feat: Mailwizz overview vs wizard flow and wizard step guard

Load Weeztix config for coupon mapping context, redirect incomplete
configs to step one, and expand admin Mailwizz UI and tests.

Made-with: Cursor

app/Http/Controllers/Admin/MailwizzController.php

@@ -8,18 +8,29 @@ use App\Http\Controllers\Controller;
 use App\Http\Requests\Admin\UpdateMailwizzConfigRequest;
 use App\Models\PreregistrationPage;
 use Illuminate\Http\RedirectResponse;
+use Illuminate\Http\Request;
 use Illuminate\Support\Facades\DB;
 use Illuminate\View\View;
 
 class MailwizzController extends Controller
 {
-    public function edit(PreregistrationPage $page): View
+    public function edit(Request $request, PreregistrationPage $page): View|RedirectResponse
     {
         $this->authorize('update', $page);
 
-        $page->load('mailwizzConfig');
+        $page->load(['mailwizzConfig', 'weeztixConfig']);
 
-        return view('admin.mailwizz.edit', compact('page'));
+        $config = $page->mailwizzConfig;
+        $showWizard = $config === null || $request->boolean('wizard');
+        if ($showWizard && $config === null) {
+            $requestedStep = min(4, max(1, (int) $request->query('step', 1)));
+            if ($requestedStep !== 1) {
+                return redirect()
+                    ->route('admin.pages.mailwizz.edit', ['page' => $page, 'wizard' => 1, 'step' => 1]);
+            }
+        }
+
+        return view('admin.mailwizz.edit', compact('page', 'showWizard'));
     }
 
     public function update(UpdateMailwizzConfigRequest $request, PreregistrationPage $page): RedirectResponse