UI: Credit-Wallet-Hub + Per-PM Add-ons im Backend-Pressekonto

Wallet-Oekonomie im Customer-Bereich sichtbar gemacht:

- Buchungen & Add-ons: Guthaben-Anzeige, Credit-Paket-Topup (Bonus-Staffel),
  Extra-PM-Kauf aus der Wallet mit kontextuellem Mini-Checkout-Hinweis,
  Pruefkontingent-Status (frei/Monat, heute/Tageslimit), Wallet-Verlauf
- PM-Detailseite: Add-ons-Panel fuer veroeffentlichte PMs -- Boost buchen
  (7/14/30 Tage, Gate nur gruen, Verlaengerung), Veroeffentlichungsnachweis
  kaufen + Download. Aktionen ueber BoostService/ProofPdfService

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/Feature/Billing/BookingsPageTest.php

@@ -5,6 +5,7 @@ use App\Models\Plan;
 use App\Models\SinglePurchase;
 use App\Models\User;
 use App\Models\UserPaymentOption;
+use App\Services\Billing\CreditWalletService;
 use App\Services\Billing\StripeCheckoutService;
 use Database\Seeders\RolesAndPermissionsSeeder;
 use Livewire\Volt\Volt as LivewireVolt;
@@ -162,3 +163,48 @@ test('the checkout success banner is shown after returning from stripe', functio
         ->assertOk()
         ->assertSee('Vielen Dank für Ihre Buchung!');
 });
+
+test('the wallet block shows the balance and the credit pack topup links', function () {
+    /** @var TestCase $this */
+    $user = bookingsTestCustomer();
+    app(CreditWalletService::class)->credit($user, 30);
+
+    $this->actingAs($user);
+
+    LivewireVolt::test('customer.bookings')
+        ->assertSee('Credit-Wallet & Add-ons')
+        ->assertSee('30')
+        ->assertSee('27 Credits') // Bonus-Paket
+        ->assertSee(route('me.checkout.credit-topup', ['pack' => 'p25']), false)
+        ->assertSee('Prüfkontingent')
+        ->assertSee('4 / 4'); // Einzel-Tier: 4 Freiprüfungen
+});
+
+test('buying an extra pm from the wallet succeeds with enough credits', function () {
+    /** @var TestCase $this */
+    $user = bookingsTestCustomer();
+    app(CreditWalletService::class)->credit($user, 25);
+
+    $this->actingAs($user);
+
+    LivewireVolt::test('customer.bookings')
+        ->call('buyExtraPm')
+        ->assertSee('Extra-Pressemitteilung gebucht');
+
+    expect($user->fresh()->creditBalance())->toBe(6); // 25 - 19 (Einzel-Tier)
+    expect($user->singlePurchases()->grantingSubmission()->count())->toBe(1);
+});
+
+test('buying an extra pm without enough credits shows the mini checkout hint', function () {
+    /** @var TestCase $this */
+    $user = bookingsTestCustomer();
+    app(CreditWalletService::class)->credit($user, 8);
+
+    $this->actingAs($user);
+
+    LivewireVolt::test('customer.bookings')
+        ->call('buyExtraPm')
+        ->assertSee('Bitte laden Sie mindestens 11 Credits nach');
+
+    expect($user->singlePurchases()->count())->toBe(0);
+});