Added tax support

Reviewed-on: #13

.env.example

@@ -56,6 +56,8 @@ MAIL_PASSWORD=null
 MAIL_FROM_ADDRESS="hello@example.com"
 MAIL_FROM_NAME="${APP_NAME}"
 
+APP_ADMIN_MAIL=
+
 AWS_ACCESS_KEY_ID=
 AWS_SECRET_ACCESS_KEY=
 AWS_DEFAULT_REGION=us-east-1

CLAUDE.md

@@ -0,0 +1,17 @@
+# CLAUDE.md
+
+Laravel 12 + Inertia/Vue, mandantenfähig (custom `tenant`-Scoping über `app('tenant')`, gesetzt in
+`app/Middleware/IdentifyTenant.php`). PHP 8.5 — Tests/Artisan laufen im Container:
+`docker exec mareike-mareike-app-1 php artisan test`.
+
+## Projektkonventionen (verbindlich)
+
+Die verbindlichen Konventionen (Actions/Request-Command-Response, Controller, Repositories, Models/Resources, Tenant,
+Routing, Mails) stehen in `.ai/conventions.md` und werden hier eingebunden — **immer beachten**:
+
+@.ai/conventions.md
+
+## Bereichs-Dokumentation
+
+- [Zahlungsmodule](app/EventPaymentModules/CLAUDE.md) — interface-gesteuerte Zahlungsarten (Optionen, Config,
+  Anmelde-Zusammenfassung, GiroCode/Fähigkeits-Interfaces, neues Modul hinzufügen).

app/Domains/Admin/Actions/CreateTenant/CreateTenantAction.php

@@ -2,6 +2,8 @@
 
 namespace App\Domains\Admin\Actions\CreateTenant;
 
+use App\Models\AvailablePaymentMethod;
+use App\Models\PaymentMethod;
 use App\Models\Tenant;
 
 class CreateTenantAction
@@ -29,6 +31,20 @@ class CreateTenantAction
             'has_active_instance' => true,
         ]);
 
+        $paymentMethodDefaults = PaymentMethod::defaults();
+        foreach (PaymentMethod::all() as $paymentMethod) {
+            $defaults = $paymentMethodDefaults[$paymentMethod->slug] ?? ['name' => $paymentMethod->slug, 'description' => null, 'configuration' => []];
+
+            AvailablePaymentMethod::create([
+                'tenant' => $tenant->slug,
+                'slug' => $paymentMethod->slug,
+                'name' => $defaults['name'],
+                'description' => $defaults['description'],
+                'active' => true,
+                'configuration' => PaymentMethod::sanitizeConfiguration($paymentMethod->slug, $defaults['configuration'] ?? []),
+            ]);
+        }
+
         $response->success = true;
         $response->message = 'Stamm wurde angelegt.';
         $response->slug = $tenant->slug;

app/Domains/Admin/Actions/RemovePaymentMethodUsage/RemovePaymentMethodUsageAction.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Domains\Admin\Actions\RemovePaymentMethodUsage;
+
+use App\Mail\EventReportMails\PaymentMethodsExhaustedMail;
+use App\Models\AvailablePaymentMethod;
+use Illuminate\Support\Facades\Mail;
+
+class RemovePaymentMethodUsageAction
+{
+    public function execute(AvailablePaymentMethod $availablePaymentMethod): void
+    {
+        foreach ($availablePaymentMethod->events()->get() as $event) {
+            $event->paymentMethods()->detach($availablePaymentMethod->slug);
+
+            $remainingActive = $event->paymentMethods()->where('active', true)->count();
+            if ($remainingActive === 0 && $event->registration_allowed) {
+                $event->registration_allowed = false;
+                $event->save();
+
+                $recipients = $event->eventManagers;
+                if ($event->costUnit !== null) {
+                    $recipients = $recipients->merge($event->costUnit->treasurers);
+                }
+
+                foreach ($recipients->unique('id') as $recipient) {
+                    Mail::to($recipient->email)->send(new PaymentMethodsExhaustedMail($event));
+                }
+            }
+        }
+    }
+}

app/Domains/Admin/Actions/UpdateAvailablePaymentMethod/UpdateAvailablePaymentMethodAction.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace App\Domains\Admin\Actions\UpdateAvailablePaymentMethod;
+
+use App\Domains\Admin\Actions\RemovePaymentMethodUsage\RemovePaymentMethodUsageAction;
+use App\Models\PaymentMethod;
+
+class UpdateAvailablePaymentMethodAction
+{
+    public function __construct(private UpdateAvailablePaymentMethodRequest $request)
+    {
+    }
+
+    public function execute(): UpdateAvailablePaymentMethodResponse
+    {
+        $response = new UpdateAvailablePaymentMethodResponse();
+        $paymentMethod = $this->request->availablePaymentMethod;
+        $wasActive = $paymentMethod->active;
+
+        // Nur bekannte Options-Keys übernehmen -- das Options-Schema des Zahlungsmoduls ist die Autorität.
+        $configuration = PaymentMethod::sanitizeConfiguration($paymentMethod->slug, $this->request->configuration);
+
+        // Guard: Aktivierung nur erlaubt, wenn alle Pflicht-Optionen befüllt sind.
+        if ($this->request->active && !PaymentMethod::isConfigurationComplete($paymentMethod->slug, $configuration)) {
+            $response->success = false;
+            $response->message = 'Bitte zuerst alle Pflichtfelder ausfüllen, bevor die Zahlungsmethode aktiviert wird.';
+
+            return $response;
+        }
+
+        $paymentMethod->update([
+            'name' => $this->request->name,
+            'description' => $this->request->description,
+            'active' => $this->request->active,
+            'configuration' => $configuration,
+        ]);
+
+        if ($wasActive && !$this->request->active) {
+            (new RemovePaymentMethodUsageAction())->execute($paymentMethod);
+        }
+
+        $response->success = true;
+        $response->message = 'Zahlungsmethode wurde gespeichert.';
+
+        return $response;
+    }
+}

app/Domains/Admin/Actions/UpdateAvailablePaymentMethod/UpdateAvailablePaymentMethodRequest.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Domains\Admin\Actions\UpdateAvailablePaymentMethod;
+
+use App\Models\AvailablePaymentMethod;
+
+class UpdateAvailablePaymentMethodRequest
+{
+    /**
+     * @param array<string, mixed> $configuration
+     */
+    public function __construct(
+        public AvailablePaymentMethod $availablePaymentMethod,
+        public string $name,
+        public ?string $description,
+        public bool $active,
+        public array $configuration = [],
+    ) {
+    }
+}

app/Domains/Admin/Actions/UpdateAvailablePaymentMethod/UpdateAvailablePaymentMethodResponse.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace App\Domains\Admin\Actions\UpdateAvailablePaymentMethod;
+
+class UpdateAvailablePaymentMethodResponse
+{
+    public bool $success = false;
+    public string $message = '';
+}

app/Domains/Admin/Actions/UpdateTenantPayment/UpdateTenantPaymentAction.php

@@ -2,6 +2,10 @@
 
 namespace App\Domains\Admin\Actions\UpdateTenantPayment;
 
+use App\Models\AvailablePaymentMethod;
+use App\Models\PaymentMethod;
+use App\Scopes\SiteScope;
+
 class UpdateTenantPaymentAction
 {
     public function __construct(private UpdateTenantPaymentRequest $request)
@@ -18,9 +22,41 @@ class UpdateTenantPaymentAction
             'account_name' => $this->request->accountName,
         ]);
 
+        $this->syncTransferPaymentConfiguration();
+
         $response->success = true;
-        $response->message = 'Bezahldaten wurden gespeichert.';
+        $response->message = 'IBAN-Informationen wurden gespeichert.';
 
         return $response;
     }
+
+    /**
+     * Übernimmt die eingegebenen IBAN-Daten direkt in die Tenant-Config der Überweisungs-Zahlungsart
+     * (Kontoinhaber/IBAN/BIC), damit sie nicht doppelt gepflegt werden müssen. Bestehende weitere
+     * Config-Werte (z.B. Symbol) bleiben erhalten. Der Ziel-Tenant kann ein verwalteter sein, daher
+     * ohne SiteScope explizit auf den Tenant-Slug gefiltert.
+     */
+    private function syncTransferPaymentConfiguration(): void
+    {
+        $slug = PaymentMethod::PAYMENT_ACCOUNT_TRANSACTION;
+
+        $method = AvailablePaymentMethod::withoutGlobalScope(SiteScope::class)
+            ->where('tenant', $this->request->tenant->slug)
+            ->where('slug', $slug)
+            ->first();
+
+        if ($method === null) {
+            return;
+        }
+
+        $method->configuration = PaymentMethod::sanitizeConfiguration($slug, array_merge(
+            $method->configuration ?? [],
+            [
+                'account_owner' => $this->request->accountName,
+                'iban' => $this->request->accountIban,
+                'bic' => $this->request->accountBic,
+            ],
+        ));
+        $method->save();
+    }
 }

app/Domains/Admin/Actions/UpdateTenantTax/UpdateTenantTaxAction.php

@@ -0,0 +1,64 @@
+<?php
+
+namespace App\Domains\Admin\Actions\UpdateTenantTax;
+
+use App\Enumerations\TaxExemptionReason;
+
+class UpdateTenantTaxAction
+{
+    public function __construct(private UpdateTenantTaxRequest $request)
+    {
+    }
+
+    public function execute(): UpdateTenantTaxResponse
+    {
+        $response = new UpdateTenantTaxResponse();
+
+        if ($this->request->taxLiable) {
+            $this->request->tenant->update([
+                'tax_liable' => true,
+                'vat_rate' => $this->clampVatRate($this->request->vatRate),
+                'tax_exemption_reason' => null,
+                'tax_exemption_note' => null,
+            ]);
+
+            $response->success = true;
+            $response->message = 'Steuerinformationen wurden gespeichert.';
+
+            return $response;
+        }
+
+        $reason = TaxExemptionReason::tryFrom((string)$this->request->exemptionReason);
+
+        if ($reason === null) {
+            $response->message = 'Bitte einen gültigen Befreiungsgrund auswählen.';
+
+            return $response;
+        }
+
+        $note = trim((string)$this->request->exemptionNote);
+
+        if ($reason->requiresNote() && $note === '') {
+            $response->message = 'Bitte einen Text für den Befreiungsgrund angeben.';
+
+            return $response;
+        }
+
+        $this->request->tenant->update([
+            'tax_liable' => false,
+            'vat_rate' => 0,
+            'tax_exemption_reason' => $reason->value,
+            'tax_exemption_note' => $reason->requiresNote() ? $note : null,
+        ]);
+
+        $response->success = true;
+        $response->message = 'Steuerinformationen wurden gespeichert.';
+
+        return $response;
+    }
+
+    private function clampVatRate(int $vatRate): int
+    {
+        return max(0, min(100, $vatRate));
+    }
+}

app/Domains/Admin/Actions/UpdateTenantTax/UpdateTenantTaxRequest.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Domains\Admin\Actions\UpdateTenantTax;
+
+use App\Models\Tenant;
+
+class UpdateTenantTaxRequest
+{
+    public function __construct(
+        public Tenant  $tenant,
+        public bool    $taxLiable,
+        public int     $vatRate,
+        public ?string $exemptionReason,
+        public ?string $exemptionNote,
+    )
+    {
+    }
+}

app/Domains/Admin/Actions/UpdateTenantTax/UpdateTenantTaxResponse.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace App\Domains\Admin\Actions\UpdateTenantTax;
+
+class UpdateTenantTaxResponse
+{
+    public bool $success = false;
+    public string $message = '';
+}

app/Domains/Admin/Controllers/ManagedTenantTaxGetController.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Domains\Admin\Controllers;
+
+use App\Enumerations\TaxExemptionReason;
+use App\Scopes\CommonController;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class ManagedTenantTaxGetController extends CommonController
+{
+    public function __invoke(string $slug, Request $request): JsonResponse
+    {
+        $tenant = $this->adminTenants->findBySlug($slug);
+
+        return response()->json([
+            'tax_liable' => $tenant->tax_liable,
+            'vat_rate' => $tenant->vat_rate,
+            'tax_exemption_reason' => $tenant->tax_exemption_reason,
+            'tax_exemption_note' => $tenant->tax_exemption_note,
+            'exemption_reasons' => TaxExemptionReason::options(),
+            'saveEndpoint' => '/api/v1/admin/tenants/' . $slug . '/tax',
+        ]);
+    }
+}

app/Domains/Admin/Controllers/ManagedTenantTaxUpdateController.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Domains\Admin\Controllers;
+
+use App\Domains\Admin\Actions\UpdateTenantTax\UpdateTenantTaxAction;
+use App\Domains\Admin\Actions\UpdateTenantTax\UpdateTenantTaxRequest;
+use App\Scopes\CommonController;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class ManagedTenantTaxUpdateController extends CommonController
+{
+    public function __invoke(string $slug, Request $request): JsonResponse
+    {
+        $tenant = $this->adminTenants->findBySlug($slug);
+
+        $action = new UpdateTenantTaxAction(new UpdateTenantTaxRequest(
+            tenant: $tenant,
+            taxLiable: $request->boolean('tax_liable'),
+            vatRate: (int)$request->input('vat_rate', 0),
+            exemptionReason: $request->input('tax_exemption_reason'),
+            exemptionNote: $request->input('tax_exemption_note'),
+        ));
+
+        $response = $action->execute();
+
+        return response()->json([
+            'status' => $response->success ? 'success' : 'error',
+            'message' => $response->message,
+        ]);
+    }
+}

app/Domains/Admin/Controllers/TenantPaymentMethodsGetController.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Domains\Admin\Controllers;
+
+use App\Models\AvailablePaymentMethod;
+use App\Resources\AvailablePaymentMethodResource;
+use App\Scopes\CommonController;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class TenantPaymentMethodsGetController extends CommonController
+{
+    public function __invoke(Request $request): JsonResponse
+    {
+        return response()->json([
+            'paymentMethods' => AvailablePaymentMethod::all()
+                ->map(fn (AvailablePaymentMethod $method) => new AvailablePaymentMethodResource($method)->toArray($request)),
+            'saveEndpoint' => '/api/v1/admin/tenant/payment-methods',
+        ]);
+    }
+}

app/Domains/Admin/Controllers/TenantPaymentMethodsUpdateController.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Domains\Admin\Controllers;
+
+use App\Domains\Admin\Actions\UpdateAvailablePaymentMethod\UpdateAvailablePaymentMethodAction;
+use App\Domains\Admin\Actions\UpdateAvailablePaymentMethod\UpdateAvailablePaymentMethodRequest;
+use App\Models\AvailablePaymentMethod;
+use App\Scopes\CommonController;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class TenantPaymentMethodsUpdateController extends CommonController
+{
+    public function __invoke(int $id, Request $request): JsonResponse
+    {
+        $availablePaymentMethod = AvailablePaymentMethod::findOrFail($id);
+
+        $action = new UpdateAvailablePaymentMethodAction(new UpdateAvailablePaymentMethodRequest(
+            availablePaymentMethod: $availablePaymentMethod,
+            name: $request->input('name'),
+            description: $request->input('description'),
+            active: (bool) $request->input('active'),
+            configuration: (array) $request->input('configuration', []),
+        ));
+
+        $response = $action->execute();
+
+        return response()->json([
+            'status' => $response->success ? 'success' : 'error',
+            'message' => $response->message,
+        ]);
+    }
+}

app/Domains/Admin/Controllers/TenantTaxGetController.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Domains\Admin\Controllers;
+
+use App\Enumerations\TaxExemptionReason;
+use App\Scopes\CommonController;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class TenantTaxGetController extends CommonController
+{
+    public function __invoke(Request $request): JsonResponse
+    {
+        return response()->json([
+            'tax_liable' => $this->tenant->tax_liable,
+            'vat_rate' => $this->tenant->vat_rate,
+            'tax_exemption_reason' => $this->tenant->tax_exemption_reason,
+            'tax_exemption_note' => $this->tenant->tax_exemption_note,
+            'exemption_reasons' => TaxExemptionReason::options(),
+            'saveEndpoint' => '/api/v1/admin/tenant/tax',
+        ]);
+    }
+}

app/Domains/Admin/Controllers/TenantTaxUpdateController.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Domains\Admin\Controllers;
+
+use App\Domains\Admin\Actions\UpdateTenantTax\UpdateTenantTaxAction;
+use App\Domains\Admin\Actions\UpdateTenantTax\UpdateTenantTaxRequest;
+use App\Scopes\CommonController;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
+
+class TenantTaxUpdateController extends CommonController
+{
+    public function __invoke(Request $request): JsonResponse
+    {
+        $action = new UpdateTenantTaxAction(new UpdateTenantTaxRequest(
+            tenant: $this->tenant,
+            taxLiable: $request->boolean('tax_liable'),
+            vatRate: (int)$request->input('vat_rate', 0),
+            exemptionReason: $request->input('tax_exemption_reason'),
+            exemptionNote: $request->input('tax_exemption_note'),
+        ));
+
+        $response = $action->execute();
+
+        return response()->json([
+            'status' => $response->success ? 'success' : 'error',
+            'message' => $response->message,
+        ]);
+    }
+}

app/Domains/Admin/Routes/api.php

@@ -1,10 +1,5 @@
 <?php
 
-use App\Domains\Admin\Controllers\UserDetailGetController;
-use App\Domains\Admin\Controllers\UserListApiController;
-use App\Domains\Admin\Controllers\UserResetPasswordController;
-use App\Domains\Admin\Controllers\UserToggleActiveController;
-use App\Domains\Admin\Controllers\UserUpdateController;
 use App\Domains\Admin\Controllers\ManagedTenantContactGetController;
 use App\Domains\Admin\Controllers\ManagedTenantContactUpdateController;
 use App\Domains\Admin\Controllers\ManagedTenantGdprGetController;
@@ -13,6 +8,8 @@ use App\Domains\Admin\Controllers\ManagedTenantImpressGetController;
 use App\Domains\Admin\Controllers\ManagedTenantImpressUpdateController;
 use App\Domains\Admin\Controllers\ManagedTenantPaymentGetController;
 use App\Domains\Admin\Controllers\ManagedTenantPaymentUpdateController;
+use App\Domains\Admin\Controllers\ManagedTenantTaxGetController;
+use App\Domains\Admin\Controllers\ManagedTenantTaxUpdateController;
 use App\Domains\Admin\Controllers\TenantContactGetController;
 use App\Domains\Admin\Controllers\TenantContactUpdateController;
 use App\Domains\Admin\Controllers\TenantCreateController;
@@ -24,7 +21,16 @@ use App\Domains\Admin\Controllers\TenantImpressGetController;
 use App\Domains\Admin\Controllers\TenantImpressUpdateController;
 use App\Domains\Admin\Controllers\TenantListApiController;
 use App\Domains\Admin\Controllers\TenantPaymentGetController;
+use App\Domains\Admin\Controllers\TenantPaymentMethodsGetController;
+use App\Domains\Admin\Controllers\TenantPaymentMethodsUpdateController;
 use App\Domains\Admin\Controllers\TenantPaymentUpdateController;
+use App\Domains\Admin\Controllers\TenantTaxGetController;
+use App\Domains\Admin\Controllers\TenantTaxUpdateController;
+use App\Domains\Admin\Controllers\UserDetailGetController;
+use App\Domains\Admin\Controllers\UserListApiController;
+use App\Domains\Admin\Controllers\UserResetPasswordController;
+use App\Domains\Admin\Controllers\UserToggleActiveController;
+use App\Domains\Admin\Controllers\UserUpdateController;
 use App\Middleware\AdminRoleMiddleware;
 use App\Middleware\IdentifyTenant;
 use App\Middleware\LvOnlyMiddleware;
@@ -36,10 +42,14 @@ Route::middleware([IdentifyTenant::class, 'auth', AdminRoleMiddleware::class])->
         Route::post('/contact', TenantContactUpdateController::class);
         Route::get('/payment', TenantPaymentGetController::class);
         Route::post('/payment', TenantPaymentUpdateController::class);
+        Route::get('/payment-methods', TenantPaymentMethodsGetController::class);
+        Route::post('/payment-methods/{id}', TenantPaymentMethodsUpdateController::class);
         Route::get('/impress', TenantImpressGetController::class);
         Route::post('/impress', TenantImpressUpdateController::class);
         Route::get('/gdpr', TenantGdprGetController::class);
         Route::post('/gdpr', TenantGdprUpdateController::class);
+        Route::get('/tax', TenantTaxGetController::class);
+        Route::post('/tax', TenantTaxUpdateController::class);
     });
 
     Route::prefix('api/v1/admin/users')->group(function () {
@@ -65,6 +75,8 @@ Route::middleware([IdentifyTenant::class, 'auth', AdminRoleMiddleware::class])->
                 Route::post('/impress', ManagedTenantImpressUpdateController::class);
                 Route::get('/gdpr', ManagedTenantGdprGetController::class);
                 Route::post('/gdpr', ManagedTenantGdprUpdateController::class);
+                Route::get('/tax', ManagedTenantTaxGetController::class);
+                Route::post('/tax', ManagedTenantTaxUpdateController::class);
             });
         });
     });

app/Domains/Admin/Views/Partials/TenantPaymentMethods.vue

@@ -0,0 +1,264 @@
+<script setup>
+import {computed, ref} from 'vue';
+import FullScreenModal from "../../../../Views/Components/FullScreenModal.vue";
+import TextEditor from "../../../../Views/Components/TextEditor.vue";
+import RichSelectBox from "../../../../Views/Components/RichSelectBox.vue";
+import {PAYMENT_METHOD_ICONS} from "../../../../../resources/js/constants/paymentMethodIcons.js";
+import {useAjax} from "../../../../../resources/js/components/ajaxHandler.js";
+import {toast} from "vue3-toastify";
+
+const props = defineProps({
+    data: {
+        type: Object,
+        default: () => ({})
+    },
+})
+
+const { request } = useAjax()
+
+const paymentMethods = ref(props.data.paymentMethods ?? [])
+const editing = ref(null)
+const form = ref({ name: '', description: '', active: true, configuration: {} })
+
+// Sind alle Pflichtfelder des aktuell bearbeiteten Moduls befüllt? Der Server ist die
+// eigentliche Autorität (Guard), das hier dient nur der Bedienführung.
+const requiredComplete = computed(() => {
+    if (!editing.value) return true
+    return (editing.value.optionsSchema ?? [])
+        .filter(option => option.required)
+        .every(option => {
+            const value = form.value.configuration[option.name]
+            return value !== undefined && value !== null && value !== ''
+        })
+})
+
+function edit(paymentMethod) {
+    editing.value = paymentMethod
+    const configuration = {}
+    for (const option of paymentMethod.optionsSchema ?? []) {
+        configuration[option.name] = paymentMethod.configuration?.[option.name] ?? ''
+    }
+    form.value = {
+        name: paymentMethod.name,
+        description: paymentMethod.description ?? '',
+        active: paymentMethod.active,
+        configuration,
+    }
+}
+
+function close() {
+    editing.value = null
+}
+
+async function save() {
+    const response = await request('/api/v1/admin/tenant/payment-methods/' + editing.value.id, {
+        method: 'POST',
+        body: form.value,
+    })
+
+    if (response && response.status === 'success') {
+        toast.success(response.message)
+        Object.assign(editing.value, form.value)
+        close()
+    } else {
+        toast.error(response?.message ?? 'Fehler beim Speichern')
+    }
+}
+</script>
+
+<template>
+    <table class="payment-method-table">
+        <thead>
+            <tr>
+                <th>Name</th>
+                <th>Status</th>
+                <th class="empty"></th>
+            </tr>
+        </thead>
+        <tbody>
+            <tr v-for="paymentMethod in paymentMethods" :key="paymentMethod.id">
+                <td>{{ paymentMethod.name }}</td>
+                <td>
+                    <span :class="paymentMethod.active ? 'badge-active' : 'badge-inactive'">
+                        {{ paymentMethod.active ? 'Aktiv' : 'Inaktiv' }}
+                    </span>
+                </td>
+                <td>
+                    <button class="btn-edit" @click="edit(paymentMethod)">Bearbeiten</button>
+                </td>
+            </tr>
+        </tbody>
+    </table>
+
+    <FullScreenModal :show="editing !== null" @close="close">
+        <template v-if="editing">
+            <h2>Zahlungsmodul bearbeiten</h2>
+            <table class="data-table">
+                <tr><th>Name</th><td><input type="text" v-model="form.name" class="form-input" /></td></tr>
+                <tr><th>Beschreibung</th><td><textarea v-model="form.description" class="form-input"></textarea></td></tr>
+                <tr v-for="option in editing.optionsSchema ?? []" :key="option.name">
+                    <th>{{ option.label }}<span v-if="option.required" class="required-marker">*</span></th>
+                    <td>
+                        <RichSelectBox v-if="option.type === 'icon'" v-model="form.configuration[option.name]"
+                                       :options="PAYMENT_METHOD_ICONS" placeholder="Symbol wählen…"/>
+                        <TextEditor v-else-if="option.type === 'richtext'" v-model="form.configuration[option.name]"/>
+                        <input v-else type="text" v-model="form.configuration[option.name]" class="form-input"/>
+                        <span v-if="option.hint" class="option-hint">{{ option.hint }}</span>
+                    </td>
+                </tr>
+                <tr>
+                    <th>Aktiv</th>
+                    <td>
+                        <input type="checkbox" v-model="form.active" :disabled="!requiredComplete && !form.active" />
+                        <span v-if="!requiredComplete" class="hint">Bitte zuerst alle Pflichtfelder (*) ausfüllen, um zu aktivieren.</span>
+                    </td>
+                </tr>
+            </table>
+            <div class="btn-group">
+                <button class="btn-save" @click="save">Speichern</button>
+                <button class="btn-cancel" @click="close">Abbrechen</button>
+            </div>
+        </template>
+    </FullScreenModal>
+</template>
+
+<style scoped>
+.payment-method-table {
+    width: 100%;
+    border-collapse: collapse;
+    border: 1px solid #d1d5db;
+    border-radius: 8px;
+    overflow: hidden;
+}
+
+.payment-method-table thead th {
+    text-align: left;
+    padding: 10px 16px;
+    background-color: #f9fafb;
+    color: #374151;
+    font-weight: bold;
+    border-bottom: 2px solid #d1d5db;
+}
+
+.payment-method-table tbody td {
+    padding: 10px 16px;
+    border-bottom: 1px solid #e5e7eb;
+}
+
+.badge-active {
+    display: inline-block;
+    padding: 3px 12px;
+    border-radius: 12px;
+    font-size: 0.85rem;
+    font-weight: bold;
+    color: #166534;
+    background-color: #dcfce7;
+    border: 1px solid #22c55e;
+}
+
+.badge-inactive {
+    display: inline-block;
+    padding: 3px 12px;
+    border-radius: 12px;
+    font-size: 0.85rem;
+    font-weight: bold;
+    color: #991b1b;
+    background-color: #fee2e2;
+    border: 1px solid #ef4444;
+}
+
+.btn-edit {
+    padding: 6px 16px;
+    border: none;
+    border-radius: 6px;
+    cursor: pointer;
+    font-weight: bold;
+    font-size: 0.9rem;
+    background-color: #1d4899;
+    color: #ffffff;
+}
+
+.btn-edit:hover {
+    background-color: #163a7a;
+}
+
+.data-table {
+    width: 100%;
+    border-collapse: collapse;
+    margin-top: 15px;
+}
+
+.data-table th {
+    text-align: left;
+    padding: 8px 12px;
+    width: 200px;
+    color: #374151;
+    border-bottom: 1px solid #e5e7eb;
+}
+
+.data-table td {
+    padding: 8px 12px;
+    border-bottom: 1px solid #e5e7eb;
+}
+
+.form-input {
+    width: 100%;
+    padding: 6px 10px;
+    border: 1px solid #d1d5db;
+    border-radius: 6px;
+    font-size: 0.95rem;
+    box-sizing: border-box;
+}
+
+.required-marker {
+    color: #ef4444;
+    margin-left: 2px;
+}
+
+.hint {
+    display: block;
+    margin-top: 4px;
+    font-size: 0.8rem;
+    color: #b45309;
+}
+
+.option-hint {
+    display: block;
+    margin-top: 4px;
+    font-size: 0.8rem;
+    color: #6b7280;
+}
+
+.btn-group {
+    display: flex;
+    gap: 10px;
+    margin-top: 15px;
+}
+
+.btn-save, .btn-cancel {
+    padding: 8px 20px;
+    border: none;
+    border-radius: 6px;
+    cursor: pointer;
+    font-weight: bold;
+    font-size: 0.9rem;
+}
+
+.btn-save {
+    background-color: #16a34a;
+    color: #ffffff;
+}
+
+.btn-save:hover {
+    background-color: #15803d;
+}
+
+.btn-cancel {
+    background-color: #e5e7eb;
+    color: #374151;
+}
+
+.btn-cancel:hover {
+    background-color: #d1d5db;
+}
+</style>

app/Domains/Admin/Views/Partials/TenantTaxInfo.vue

@@ -0,0 +1,223 @@
+<script setup>
+import {computed, ref} from 'vue';
+import {useAjax} from "../../../../../resources/js/components/ajaxHandler.js";
+import RichSelectBox from "../../../../Views/Components/RichSelectBox.vue";
+import {toast} from "vue3-toastify";
+
+const props = defineProps({
+    data: {
+        type: Object,
+        default: () => ({})
+    },
+})
+
+const {request} = useAjax()
+
+const editing = ref(false)
+
+const reasons = computed(() => props.data.exemption_reasons ?? [])
+
+const liableOptions = [
+    {value: '1', label: 'Ja – Umsatzsteuer wird erhoben'},
+    {value: '0', label: 'Nein – umsatzsteuerbefreit'},
+]
+
+const form = ref({
+    tax_liable: props.data.tax_liable ? '1' : '0',
+    vat_rate: props.data.vat_rate ?? 0,
+    tax_exemption_reason: props.data.tax_exemption_reason ?? '',
+    tax_exemption_note: props.data.tax_exemption_note ?? '',
+})
+
+const isLiable = computed(() => form.value.tax_liable === '1')
+const isCustomReason = computed(() => form.value.tax_exemption_reason === 'custom')
+
+const selectedReason = computed(
+    () => reasons.value.find(r => r.value === form.value.tax_exemption_reason) ?? null
+)
+
+// Vorschau des Pflichthinweises nach § 14 Abs. 4 Nr. 8 UStG, der später auf der Rechnung erscheint.
+const invoiceHint = computed(() => {
+    if (isLiable.value) {
+        return `Umsatzsteuerpflichtig – USt-Satz: ${form.value.vat_rate || 0} %`
+    }
+    if (isCustomReason.value) {
+        return form.value.tax_exemption_note?.trim() || '—'
+    }
+    return selectedReason.value?.text || '—'
+})
+
+const reasonLabel = computed(() => selectedReason.value?.label ?? '—')
+
+async function save() {
+    const saveUrl = props.data.saveEndpoint ?? '/api/v1/admin/tenant/tax'
+    const response = await request(saveUrl, {
+        method: 'POST',
+        body: {
+            tax_liable: isLiable.value,
+            vat_rate: Number(form.value.vat_rate) || 0,
+            tax_exemption_reason: isLiable.value ? null : form.value.tax_exemption_reason,
+            tax_exemption_note: form.value.tax_exemption_note,
+        },
+    })
+
+    if (response && response.status === 'success') {
+        toast.success(response.message)
+        editing.value = false
+    } else {
+        toast.error(response?.message ?? 'Fehler beim Speichern')
+    }
+}
+</script>
+
+<template>
+    <div v-if="!editing">
+        <table class="data-table">
+            <tr>
+                <th>Steuerpflicht</th>
+                <td>{{ isLiable ? 'Ja – Umsatzsteuer wird erhoben' : 'Nein – umsatzsteuerbefreit' }}</td>
+            </tr>
+            <tr v-if="isLiable">
+                <th>USt-Satz</th>
+                <td>{{ form.vat_rate || 0 }} %</td>
+            </tr>
+            <tr v-else>
+                <th>Befreiungsgrund</th>
+                <td>{{ reasonLabel }}</td>
+            </tr>
+            <tr>
+                <th>Rechnungshinweis</th>
+                <td>{{ invoiceHint }}</td>
+            </tr>
+        </table>
+        <button class="btn-edit" @click="editing = true">Bearbeiten</button>
+    </div>
+
+    <div v-else>
+        <table class="data-table">
+            <tr>
+                <th>Steuerpflicht</th>
+                <td>
+                    <RichSelectBox v-model="form.tax_liable" :options="liableOptions"/>
+                </td>
+            </tr>
+
+            <tr v-if="isLiable">
+                <th>USt-Satz (%)</th>
+                <td><input type="number" min="0" max="100" v-model.number="form.vat_rate" class="form-input"/></td>
+            </tr>
+
+            <template v-else>
+                <tr>
+                    <th>Befreiungsgrund</th>
+                    <td>
+                        <RichSelectBox
+                            v-model="form.tax_exemption_reason"
+                            :options="reasons"
+                            placeholder="Grund auswählen…"
+                        />
+                    </td>
+                </tr>
+                <tr v-if="isCustomReason">
+                    <th>Freitext</th>
+                    <td>
+                        <textarea
+                            v-model="form.tax_exemption_note"
+                            class="form-input"
+                            rows="3"
+                            placeholder="Hinweistext für die Rechnung…"
+                        ></textarea>
+                    </td>
+                </tr>
+            </template>
+
+            <tr>
+                <th>Rechnungshinweis</th>
+                <td class="hint-preview">{{ invoiceHint }}</td>
+            </tr>
+        </table>
+        <div class="btn-group">
+            <button class="btn-save" @click="save">Speichern</button>
+            <button class="btn-cancel" @click="editing = false">Abbrechen</button>
+        </div>
+    </div>
+</template>
+
+<style scoped>
+.data-table {
+    width: 100%;
+    border-collapse: collapse;
+}
+
+.data-table th {
+    text-align: left;
+    padding: 8px 12px;
+    width: 200px;
+    color: #374151;
+    border-bottom: 1px solid #e5e7eb;
+    vertical-align: top;
+}
+
+.data-table td {
+    padding: 8px 12px;
+    border-bottom: 1px solid #e5e7eb;
+}
+
+.form-input {
+    width: 100%;
+    padding: 6px 10px;
+    border: 1px solid #d1d5db;
+    border-radius: 6px;
+    font-size: 0.95rem;
+    box-sizing: border-box;
+    font-family: inherit;
+}
+
+.hint-preview {
+    color: #6b7280;
+    font-style: italic;
+}
+
+.btn-edit, .btn-save, .btn-cancel {
+    margin-top: 15px;
+    padding: 8px 20px;
+    border: none;
+    border-radius: 6px;
+    cursor: pointer;
+    font-weight: bold;
+    font-size: 0.9rem;
+}
+
+.btn-edit {
+    background-color: #1d4899;
+    color: #ffffff;
+}
+
+.btn-edit:hover {
+    background-color: #163a7a;
+}
+
+.btn-save {
+    background-color: #16a34a;
+    color: #ffffff;
+}
+
+.btn-save:hover {
+    background-color: #15803d;
+}
+
+.btn-cancel {
+    background-color: #e5e7eb;
+    color: #374151;
+    margin-left: 10px;
+}
+
+.btn-cancel:hover {
+    background-color: #d1d5db;
+}
+
+.btn-group {
+    display: flex;
+    gap: 10px;
+}
+</style>

app/Domains/Admin/Views/TenantData.vue

@@ -6,6 +6,8 @@ import TenantContact from "./Partials/TenantContact.vue";
 import TenantPayment from "./Partials/TenantPayment.vue";
 import TenantImpress from "./Partials/TenantImpress.vue";
 import TenantGdpr from "./Partials/TenantGdpr.vue";
+import TenantPaymentMethods from "./Partials/TenantPaymentMethods.vue";
+import TenantTaxInfo from "./Partials/TenantTaxInfo.vue";
 
 const props = defineProps({
     tenant: Object,
@@ -18,10 +20,20 @@ const tabs = [
         endpoint: '/api/v1/admin/tenant/contact',
     },
     {
-        title: 'Bezahldaten',
+        title: 'IBAN-Informationen',
         component: TenantPayment,
         endpoint: '/api/v1/admin/tenant/payment',
     },
+    {
+        title: 'Zahlungsmodule',
+        component: TenantPaymentMethods,
+        endpoint: '/api/v1/admin/tenant/payment-methods',
+    },
+    {
+        title: 'Steuerinformationen',
+        component: TenantTaxInfo,
+        endpoint: '/api/v1/admin/tenant/tax',
+    },
     {
         title: 'Impressum',
         component: TenantImpress,

app/Domains/Admin/Views/TenantEdit.vue

@@ -7,6 +7,7 @@ import TenantContact from "./Partials/TenantContact.vue";
 import TenantPayment from "./Partials/TenantPayment.vue";
 import TenantImpress from "./Partials/TenantImpress.vue";
 import TenantGdpr from "./Partials/TenantGdpr.vue";
+import TenantTaxInfo from "./Partials/TenantTaxInfo.vue";
 
 const props = defineProps({
     tenant: Object,
@@ -26,10 +27,15 @@ const tabs = [
         endpoint: '/api/v1/admin/tenants/' + slug + '/contact',
     },
     {
-        title: 'Bezahldaten',
+        title: 'IBAN-Informationen',
         component: TenantPayment,
         endpoint: '/api/v1/admin/tenants/' + slug + '/payment',
     },
+    {
+        title: 'Steuerinformationen',
+        component: TenantTaxInfo,
+        endpoint: '/api/v1/admin/tenants/' + slug + '/tax',
+    },
     {
         title: 'Impressum',
         component: TenantImpress,

app/Domains/Event/Actions/CreateEvent/CreateEventCommand.php

@@ -3,10 +3,12 @@
 namespace App\Domains\Event\Actions\CreateEvent;
 
 use App\Enumerations\EatingHabit;
+use App\Models\AvailablePaymentMethod;
 use App\Models\Event;
 use App\Models\Tenant;
 use App\RelationModels\EventEatingHabits;
 use App\RelationModels\EventLocalGroups;
+use App\RelationModels\EventPaymentMethods;
 use Illuminate\Support\Str;
 
 class CreateEventCommand {
@@ -41,7 +43,7 @@ class CreateEventCommand {
             'account_iban' => $this->request->accountIban,
             'participation_fee_type' => $this->request->participationFeeType->slug,
             'pay_per_day' => $this->request->payPerDay,
-            'pay_direct' => $this->request->payDirect,
+            'pay_direct' => false,
             'total_max_amount' => 0,
             'support_per_person' => 0,
             'support_flat' => 0,
@@ -58,6 +60,14 @@ class CreateEventCommand {
                 'eating_habit_id' => EatingHabit::where('slug', EatingHabit::EATING_HABIT_VEGETARIAN)->first()->id,
             ]);
 
+            foreach (AvailablePaymentMethod::where('active', true)->get() as $availablePaymentMethod) {
+                EventPaymentMethods::create([
+                    'event_id' => $event->id,
+                    'slug' => $availablePaymentMethod->slug,
+                    'configuration' => $availablePaymentMethod->configuration ?? [],
+                ]);
+            }
+
             if (app('tenant')->slug === 'lv') {
                 foreach(Tenant::where(['is_active_local_group' => true])->get() as $tenant) {
                     EventLocalGroups::create(['event_id' => $event->id, 'local_group_id' => $tenant->id]);

app/Domains/Event/Actions/CreateEvent/CreateEventRequest.php

@@ -19,9 +19,8 @@ class CreateEventRequest {
     public string $accountOwner;
     public string $accountIban;
     public bool $payPerDay;
-    public bool $payDirect;
 
-    public function __construct(string $name, string $location, string $postalCode, string $email, DateTime $begin, DateTime $end, DateTime $earlyBirdEnd, DateTime $registrationFinalEnd, int $earlyBirdEndAmountIncrease, ParticipationFeeType $participationFeeType, string $accountOwner, string $accountIban, bool $payPerDay, bool $payDirect) {
+    public function __construct(string $name, string $location, string $postalCode, string $email, DateTime $begin, DateTime $end, DateTime $earlyBirdEnd, DateTime $registrationFinalEnd, int $earlyBirdEndAmountIncrease, ParticipationFeeType $participationFeeType, string $accountOwner, string $accountIban, bool $payPerDay) {
         $this->name = $name;
         $this->location = $location;
         $this->postalCode = $postalCode;
@@ -35,6 +34,5 @@ class CreateEventRequest {
         $this->accountOwner = $accountOwner;
         $this->accountIban = $accountIban;
         $this->payPerDay = $payPerDay;
-        $this->payDirect = $payDirect;
     }
 }

app/Domains/Event/Actions/SetPaymentMethods/SetPaymentMethodsCommand.php

@@ -0,0 +1,82 @@
+<?php
+
+namespace App\Domains\Event\Actions\SetPaymentMethods;
+
+use App\Models\AvailablePaymentMethod;
+use App\Models\PaymentMethod;
+use App\RelationModels\EventPaymentMethods;
+
+class SetPaymentMethodsCommand
+{
+    public SetPaymentMethodsRequest $request;
+
+    public function __construct(SetPaymentMethodsRequest $request)
+    {
+        $this->request = $request;
+    }
+
+    public function execute(): SetPaymentMethodsResponse
+    {
+        $response = new SetPaymentMethodsResponse();
+
+        if (count($this->request->paymentMethods) === 0) {
+            $response->success = false;
+            $response->message = 'Mindestens eine Zahlungsmöglichkeit muss ausgewählt sein.';
+            return $response;
+        }
+
+        $this->syncPaymentMethods();
+
+        $this->request->event->save();
+        $response->success = true;
+
+        return $response;
+    }
+
+    /**
+     * Differenzieller Sync der Zahlungsmethoden mit Snapshot-Copy-Semantik:
+     * - entfernte Methoden werden gelöscht,
+     * - neue Methoden erhalten einen Snapshot der Tenant-Config (oder eines expliziten Overrides),
+     * - bestehende Methoden behalten ihre pro-Event-Config, sofern kein Override übergeben wird.
+     */
+    private function syncPaymentMethods(): void
+    {
+        $event = $this->request->event;
+        $desiredSlugs = $this->request->paymentMethods;
+        $overrides = $this->request->paymentMethodConfigurations;
+
+        $existing = EventPaymentMethods::where('event_id', $event->id)->get()->keyBy('slug');
+
+        // Nicht mehr gewünschte Methoden entfernen.
+        foreach ($existing as $slug => $row) {
+            if (!in_array($slug, $desiredSlugs, true)) {
+                $row->delete();
+            }
+        }
+
+        // Tenant-Instanzen (für Snapshot-Kopie neuer Methoden) laden.
+        $tenantMethods = AvailablePaymentMethod::whereIn('slug', $desiredSlugs)->get()->keyBy('slug');
+
+        foreach ($desiredSlugs as $slug) {
+            $override = $overrides[$slug] ?? null;
+
+            if (isset($existing[$slug])) {
+                // Bestehende Zuweisung: Config nur bei explizitem Override anpassen, sonst unverändert lassen.
+                if ($override !== null) {
+                    $row = $existing[$slug];
+                    $row->configuration = PaymentMethod::sanitizeConfiguration($slug, $override);
+                    $row->save();
+                }
+                continue;
+            }
+
+            // Neue Zuweisung: expliziter Override oder Snapshot der Tenant-Config.
+            $snapshot = $override ?? ($tenantMethods[$slug]->configuration ?? []);
+            EventPaymentMethods::create([
+                'event_id' => $event->id,
+                'slug' => $slug,
+                'configuration' => PaymentMethod::sanitizeConfiguration($slug, $snapshot ?? []),
+            ]);
+        }
+    }
+}

app/Domains/Event/Actions/SetPaymentMethods/SetPaymentMethodsRequest.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Domains\Event\Actions\SetPaymentMethods;
+
+use App\Models\Event;
+
+class SetPaymentMethodsRequest
+{
+    public Event $event;
+
+    /**
+     * Gewünschte Zahlungsmethoden-Slugs für das Event.
+     *
+     * @var array<int, string>
+     */
+    public array $paymentMethods;
+
+    /**
+     * Optionale pro-Event-Config-Overrides je Zahlungsmethode: [slug => [option => value]].
+     * Fehlt ein Slug, bleibt die bestehende Config erhalten bzw. wird beim ersten Zuweisen
+     * aus der Tenant-Config als Snapshot kopiert.
+     *
+     * @var array<string, array<string, mixed>>
+     */
+    public array $paymentMethodConfigurations;
+
+    public function __construct(Event $event, array $paymentMethods, array $paymentMethodConfigurations = [])
+    {
+        $this->event = $event;
+        $this->paymentMethods = $paymentMethods;
+        $this->paymentMethodConfigurations = $paymentMethodConfigurations;
+    }
+}

app/Domains/Event/Actions/SetPaymentMethods/SetPaymentMethodsResponse.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace App\Domains\Event\Actions\SetPaymentMethods;
+
+class SetPaymentMethodsResponse
+{
+    public bool $success = false;
+    public string $message = '';
+}

app/Domains/Event/Actions/SignUp/SignUpCommand.php

@@ -4,6 +4,7 @@ namespace App\Domains\Event\Actions\SignUp;
 
 use App\Enumerations\EatingHabit;
 use App\Enumerations\EfzStatus;
+use App\EventPaymentModules\EventPaymentModuleRegistry;
 use App\ValueObjects\Age;
 use Illuminate\Support\Str;
 
@@ -14,6 +15,18 @@ class SignUpCommand {
     public function execute() : SignUpResponse {
         $response = new SignUpResponse();
 
+        // Teilnehmer-Eingaben der gewählten Zahlungsart gegen das Modul-Schema absichern.
+        $module = $this->request->paymentMethod !== null
+            ? EventPaymentModuleRegistry::forSlug($this->request->paymentMethod)
+            : null;
+        $paymentOptions = $module?->sanitizeParticipantOptions($this->request->paymentOptions) ?? [];
+
+        if ($module !== null && !$module->participantOptionsComplete($paymentOptions)) {
+            $response->success = false;
+            $response->message = 'Bitte alle erforderlichen Zahlungsangaben ausfüllen.';
+            return $response;
+        }
+
         $eatingHabit = match ($this->request->eating_habit) {
             'vegan' => EatingHabit::EATING_HABIT_VEGAN,
             'vegetarian' => EatingHabit::EATING_HABIT_VEGETARIAN,
@@ -21,6 +34,7 @@ class SignUpCommand {
         };
 
         $participantAge = new Age($this->request->birthday);
+
         $response->participant = $this->request->event->participants()->create(
             [
                 'tenant' => $this->request->event->tenant,
@@ -60,6 +74,8 @@ class SignUpCommand {
                 'notes' => $this->request->notes,
                 'amount' => $this->request->amount,
                 'payment_purpose' => $this->request->event->name . ' - Beitrag ' . $this->request->firstname . ' ' . $this->request->lastname,
+                'payment_method' => $this->request->paymentMethod,
+                'payment_options' => $paymentOptions,
                 'efz_status' => $participantAge->isfullAged() ? EfzStatus::EFZ_STATUS_NOT_CHECKED : EfzStatus::EFZ_STATUS_NOT_REQUIRED,
             ]
         );

app/Domains/Event/Actions/SignUp/SignUpRequest.php

@@ -2,7 +2,6 @@
 
 namespace App\Domains\Event\Actions\SignUp;
 
-use App\Enumerations\ParticipationType;
 use App\Models\Event;
 use App\Models\Tenant;
 use App\ValueObjects\Amount;
@@ -44,7 +43,9 @@ class SignUpRequest {
         public int $arrival_eating,
         public int $departure_eating,
         public ?string $notes,
-        public Amount $amount
+        public Amount $amount,
+        public ?string $paymentMethod,
+        public array $paymentOptions = [],
     ) {
     }
 }

app/Domains/Event/Actions/SignUp/SignUpResponse.php

@@ -7,6 +7,7 @@ use App\Models\EventParticipant;
 class SignUpResponse {
     public bool $success;
     public ?EventParticipant $participant;
+    public ?string $message = null;
 
     public function __construct() {
         $this->success = false;

app/Domains/Event/Actions/UpdateEvent/UpdateEventRequest.php

@@ -22,7 +22,8 @@ class UpdateEventRequest {
     public array $contributingLocalGroups;
     public array $eatingHabits;
 
-    public function __construct(Event $event, string $eventName, string $eventLocation, string $postalCode, string $email, DateTime $earlyBirdEnd, DateTime $registrationFinalEnd, int $alcoholicsAge, bool $sendWeeklyReports, bool $registrationAllowed, Amount $flatSupport, Amount $supportPerPerson, array $contributingLocalGroups, array $eatingHabits) {
+    public function __construct(Event $event, string $eventName, string $eventLocation, string $postalCode, string $email, DateTime $earlyBirdEnd, DateTime $registrationFinalEnd, int $alcoholicsAge, bool $sendWeeklyReports, bool $registrationAllowed, Amount $flatSupport, Amount $supportPerPerson, array $contributingLocalGroups, array $eatingHabits)
+    {
         $this->event = $event;
         $this->eventName = $eventName;
         $this->eventLocation = $eventLocation;

app/Domains/Event/Actions/UpdateEvent/UpdateEventResponse.php

@@ -4,9 +4,11 @@ namespace App\Domains\Event\Actions\UpdateEvent;
 
 class UpdateEventResponse {
     public bool $success;
+    public string $message;
 
     public function __construct() {
         $this->success = false;
+        $this->message = '';
     }
 
 }

app/Domains/Event/Actions/UpdateParticipant/UpdateParticipantCommand.php

@@ -42,6 +42,7 @@ class UpdateParticipantCommand {
         $p->departure_date    = DateTime::createFromFormat('Y-m-d', $this->request->departure);
         $p->participation_type = $this->request->participationType;
         $p->eating_habit      = $this->request->eatingHabit;
+        $p->payment_method    = $this->request->paymentMethod;
         $p->allergies         = $this->request->allergies;
         $p->intolerances      = $this->request->intolerances;
         $p->medications       = $this->request->medications;

app/Domains/Event/Actions/UpdateParticipant/UpdateParticipantRequest.php

@@ -25,6 +25,7 @@ class UpdateParticipantRequest {
         public string $departure,
         public string $participationType,
         public string $eatingHabit,
+        public ?string $paymentMethod,
         public ?string $allergies,
         public ?string $intolerances,
         public ?string $medications,

app/Domains/Event/Controllers/CreateController.php

@@ -39,7 +39,6 @@ class CreateController extends CommonController {
         $registrationFinalEnd = DateTime::createFromFormat('Y-m-d', $request->input('eventRegistrationFinalEnd'));
         $participationFeeType = ParticipationFeeType::where('slug', $request->input('eventParticipationFeeType'))->first();
         $payPerDay = $request->input('eventPayPerDay');
-        $payDirect = $request->input('eventPayDirectly');
 
         $billingDeadline = clone $eventEnd;
         $billingDeadline->modify('+6 weeks');
@@ -57,8 +56,7 @@ class CreateController extends CommonController {
             $participationFeeType,
             $request->input('eventAccount'),
             $request->input('eventIban'),
-            $payPerDay,
+            $payPerDay
-            $payDirect
         );
 
         $wasSuccessful = false;

app/Domains/Event/Controllers/DetailsController.php

@@ -4,22 +4,21 @@ namespace App\Domains\Event\Controllers;
 
 use App\Domains\Event\Actions\SetParticipationFees\SetParticipationFeesCommand;
 use App\Domains\Event\Actions\SetParticipationFees\SetParticipationFeesRequest;
+use App\Domains\Event\Actions\SetPaymentMethods\SetPaymentMethodsCommand;
+use App\Domains\Event\Actions\SetPaymentMethods\SetPaymentMethodsRequest;
 use App\Domains\Event\Actions\UpdateEvent\UpdateEventCommand;
 use App\Domains\Event\Actions\UpdateEvent\UpdateEventRequest;
 use App\Domains\Event\Actions\UpdateManagers\UpdateManagersCommand;
 use App\Domains\Event\Actions\UpdateManagers\UpdateManagersRequest;
 use App\Enumerations\ParticipationFeeType;
 use App\Enumerations\ParticipationType;
-use App\Models\EventParticipant;
 use App\Providers\InertiaProvider;
 use App\Providers\PdfGenerateAndDownloadProvider;
-use App\Resources\EventResource;
 use App\Scopes\CommonController;
 use App\ValueObjects\Amount;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
 use Illuminate\Http\Response;
-use function Symfony\Component\String\b;
 
 class DetailsController extends CommonController {
     public function __invoke(string $eventId) {
@@ -63,7 +62,21 @@ class DetailsController extends CommonController {
         $eventUpdateCommand = new UpdateEventCommand($eventUpdateRequest);
         $response = $eventUpdateCommand->execute();
 
-        return response()->json(['status' => $response->success ? 'success' : 'error']);
+        return response()->json(['status' => $response->success ? 'success' : 'error', 'message' => $response->message]);
+    }
+
+    public function updatePaymentMethods(int $eventId, Request $request): JsonResponse
+    {
+        $event = $this->events->getById($eventId);
+
+        $paymentMethods = $request->input('paymentMethods', []);
+        $paymentMethodConfigurations = (array)$request->input('paymentMethodConfigurations', []);
+
+        $setPaymentMethodsRequest = new SetPaymentMethodsRequest($event, $paymentMethods, $paymentMethodConfigurations);
+        $setPaymentMethodsCommand = new SetPaymentMethodsCommand($setPaymentMethodsRequest);
+        $response = $setPaymentMethodsCommand->execute();
+
+        return response()->json(['status' => $response->success ? 'success' : 'error', 'message' => $response->message]);
     }
 
     public function updateEventManagers(int $eventId, Request $request) : JsonResponse {

app/Domains/Event/Controllers/ParticipantUpdateController.php

@@ -33,6 +33,7 @@ class ParticipantUpdateController extends CommonController {
             departure: $request->input('departure'),
             participationType: $request->input('participationType'),
             eatingHabit: $request->input('eatingHabit'),
+            paymentMethod: $request->input('paymentMethod'),
             allergies: $request->input('allergies'),
             intolerances: $request->input('intolerances'),
             medications: $request->input('medications'),

app/Domains/Event/Controllers/SignupController.php

@@ -24,7 +24,10 @@ class SignupController extends CommonController {
             $availableEvents[] = $event->toResource()->toArray($request);
         };
 
-        $event = $this->events->getByIdentifier($eventId, false)?->toResource()->toArray($request);
+        $eventModel = $this->events->getByIdentifier($eventId, false);
+        $event = $eventModel?->toResource()->toArray($request);
+        // Die (aktiven) Zahlungsmethoden stehen dem Frontend über $event['paymentMethods'] zur Verfügung;
+        // die Auswahl trifft der/die Teilnehmer\*in im Anmeldeschritt "Zahlungsart".
 
         $participantData = [
             'firstname' => '',
@@ -136,12 +139,18 @@ class SignupController extends CommonController {
             $registrationData['anreise_essen'],
             $registrationData['abreise_essen'],
             $registrationData['anmerkungen'],
-            $amount
+            $amount,
+            $registrationData['paymentMethod'] ?? null,
+            (array)($registrationData['paymentOptions'] ?? []),
         );
 
         $signupCommand = new SignUpCommand($signupRequest);
         $signupResponse = $signupCommand->execute();
 
+        if (!$signupResponse->success) {
+            return response()->json(['status' => 'error', 'message' => $signupResponse->message], 422);
+        }
+
         // 4. Addons registrieren
 
 
@@ -175,14 +184,18 @@ class SignupController extends CommonController {
 
         $siblingReduction = $request->input('sibling') === 'true';
 
-        return response()->json(['amount' =>
+        $amount = $event->calculateAmount(
-            $event->calculateAmount(
+            $request->input('participationType'),
-                $request->input('participationType'),
+            $request->input('beitrag'),
-                $request->input('beitrag'),
+            \DateTime::createFromFormat('Y-m-d', $request->input('arrival')),
-                \DateTime::createFromFormat('Y-m-d', $request->input('arrival')),
+            \DateTime::createFromFormat('Y-m-d', $request->input('departure')),
-                \DateTime::createFromFormat('Y-m-d', $request->input('departure')),
+            $siblingReduction
-                $siblingReduction
+        );
-            )->toString()
+
+        // amountValue (numerisch) steuert im Frontend das Überspringen des Zahlungsart-Schritts bei 0 €.
+        return response()->json([
+            'amount' => $amount->toString(),
+            'amountValue' => $amount->getAmount(),
         ]);
     }
 }

app/Domains/Event/Routes/api.php

@@ -45,6 +45,7 @@ Route::prefix('api/v1')
                         Route::post('/event-managers', [DetailsController::class, 'updateEventManagers']);
                         Route::post('/participation-fees', [DetailsController::class, 'updateParticipationFees']);
                         Route::post('/common-settings', [DetailsController::class, 'updateCommonSettings']);
+                        Route::post('/payment-methods', [DetailsController::class, 'updatePaymentMethods']);
                     });
 
 

app/Domains/Event/Views/Create.vue

@@ -31,7 +31,6 @@
         eventRegistrationFinalEnd: '',
         eventAccount: props.eventAccount ? props.eventAccount : '',
         eventIban: props.eventIban ? props.eventIban : '',
-        eventPayDirectly: true,
         eventPayPerDay: props.eventPayPerDay ? props.eventPayPerDay : false,
         eventParticipationFeeType: props.participationFeeType ? props.participationFeeType : 'fixed',
     });
@@ -154,7 +153,6 @@
                 eventRegistrationFinalEnd: formData.eventRegistrationFinalEnd,
                 eventAccount: formData.eventAccount,
                 eventIban: formData.eventIban,
-                eventPayDirectly: formData.eventPayDirectly,
                 eventPayPerDay: formData.eventPayPerDay,
                 eventParticipationFeeType: formData.eventParticipationFeeType,
             }
@@ -262,13 +260,6 @@
                         <ErrorText :message="errors.eventIban" /></td>
                 </tr>
 
-                <tr style="vertical-align: top;">
-                    <td colspan="2" style="font-weight: bold;">
-                        <input type="checkbox" v-model="formData.eventPayDirectly">
-                        Teilnehmende zahlen direkt aufs Veranstaltungskonto
-                    </td>
-                </tr>
-
                 <tr style="vertical-align: top;">
                     <td colspan="2" style="font-weight: bold;">
                         <input type="checkbox" v-model="formData.eventPayPerDay">

app/Domains/Event/Views/Partials/CommonSettings.vue

@@ -1,11 +1,11 @@
 <script setup>
-    import {onMounted, reactive, ref} from "vue";
+import {onMounted, reactive, ref} from "vue";
-    import ErrorText from "../../../../Views/Components/ErrorText.vue";
+import ErrorText from "../../../../Views/Components/ErrorText.vue";
-    import AmountInput from "../../../../Views/Components/AmountInput.vue";
+import AmountInput from "../../../../Views/Components/AmountInput.vue";
-    import {request} from "../../../../../resources/js/components/HttpClient.js";
+import {request} from "../../../../../resources/js/components/HttpClient.js";
-    import {toast} from "vue3-toastify";
+import {toast} from "vue3-toastify";
 
-    const emit = defineEmits(['close'])
+const emit = defineEmits(['close'])
 
 
     const props = defineProps({
@@ -15,7 +15,7 @@
 
     const dynmicProps = reactive({
         localGroups: [],
-        eatingHabits:[]
+        eatingHabits:[],
     });
 
     const contributingLocalGroups = ref([])
@@ -75,7 +75,7 @@
             toast.success('Einstellungen wurden erfolgreich gespeichert.')
             emit('close')
         } else {
-            toast.error('Beim Speichern ist ein Fehler aufgetreten.')
+            toast.error(response.message ?? 'Beim Speichern ist ein Fehler aufgetreten.')
         }
     }
 

app/Domains/Event/Views/Partials/ParticipantData.vue

@@ -49,6 +49,7 @@ const form = reactive({
     departure: '',
     participationType: '',
     eatingHabit: '',
+    paymentMethod: '',
     allergies: '',
     intolerances: '',
     medications: '',
@@ -82,6 +83,7 @@ watch(
         form.departure = participant?.departureDate ?? '';
         form.participationType = participant?.participation_type ?? '';
         form.eatingHabit = participant?.eating_habit ?? '';
+        form.paymentMethod = participant?.payment_method ?? '';
         form.allergies = participant?.allergies ?? '';
         form.intolerances = participant?.intolerances ?? '';
         form.medications = participant?.medications ?? '';
@@ -206,7 +208,7 @@ function saveParticipant() {
                     <tr>
                         <th>Telefon</th>
                         <td>
-                            <DialableTelephoneNumber v-if="!staticProps.editMode" :number="props.participant.phone_1"</DialableTelephoneNumber>
+                            <DialableTelephoneNumber v-if="!staticProps.editMode" :number="props.participant.phone_1" />
                             <input v-else v-model="form.phone_1" type="text" />
                         </td>
                     </tr>
@@ -230,7 +232,7 @@ function saveParticipant() {
                     <tr>
                         <th>Ansprechperson Telefon</th>
                         <td>
-                            <DialableTelephoneNumber v-if="!staticProps.editMode" :number="props.participant.phone_2"</DialableTelephoneNumber>
+                            <DialableTelephoneNumber v-if="!staticProps.editMode" :number="props.participant.phone_2" />
                             <input v-else v-model="form.phone_2" type="text" />
                         </td>
                     </tr>
@@ -284,6 +286,20 @@ function saveParticipant() {
                             </select>
                         </td>
                     </tr>
+                    <tr>
+                        <th>Zahlungsmethode</th>
+                        <td>
+                            <span v-if="!staticProps.editMode">{{ props.participant.paymentMethod }}</span>
+                            <select v-else v-model="form.paymentMethod">
+                                <option
+                                    v-for="paymentMethod in staticProps.event.paymentMethods"
+                                    :value="paymentMethod.slug"
+                                >
+                                    {{ paymentMethod.name }}
+                                </option>
+                            </select>
+                        </td>
+                    </tr>
                     <tr>
                         <th>eFZ-Status</th>
                         <td>

app/Domains/Event/Views/Partials/ParticipantsList.vue

@@ -1,11 +1,11 @@
 <script setup>
-import { computed, reactive, ref } from "vue";
+import {computed, reactive, ref} from "vue";
 import Modal from "../../../../Views/Components/Modal.vue";
 import ParticipantData from "./ParticipantData.vue";
-import MailCompose   from "./MailCompose.vue";
+import MailCompose from "./MailCompose.vue";
 import {toast} from "vue3-toastify";
 import {useAjax} from "../../../../../resources/js/components/ajaxHandler.js";
-import {format, getDay, getMonth, getYear} from "date-fns";
+import {format} from "date-fns";
 import AmountInput from "../../../../Views/Components/AmountInput.vue";
 import FullScreenModal from "../../../../Views/Components/FullScreenModal.vue";
 import DialableTelephoneNumber from "../../../../Views/Components/DialableTelephoneNumber.vue";
@@ -344,6 +344,14 @@ function mailToGroup(groupKey) {
                                 <span class="link" style="font-size:10pt;" @click="paymentComplete(participant)">Zahlung buchen</span> &nbsp;
                                 <span class="link" style="font-size:10pt;" @click="openPartialPaymentDialog(participant)">Teilzahlung buchen</span>
                             </span>
+                            <br/><br/>
+                            <span :id="'participant-' + participant.identifier + '-paymentmethod'"
+                                  style="font-size:10pt;">
+                                Zahlungsweise: <label
+                                :id="'participant-' + participant.identifier + '-paymentmethod-name'">{{
+                                    participant.paymentMethod ?? '—'
+                                }}</label>
+                            </span>
                         </td>
 
                         <td class="pl-email">

app/Domains/Event/Views/Partials/ParticipationFees.vue

@@ -1,16 +1,59 @@
 <script setup>
-    import {reactive, watch} from "vue";
+import {onMounted, reactive, ref} from "vue";
-    import AmountInput from "../../../../Views/Components/AmountInput.vue";
+import AmountInput from "../../../../Views/Components/AmountInput.vue";
-    import ErrorText from "../../../../Views/Components/ErrorText.vue";
+import ErrorText from "../../../../Views/Components/ErrorText.vue";
-    import {toast} from "vue3-toastify";
+import TextEditor from "../../../../Views/Components/TextEditor.vue";
-    import {request} from "../../../../../resources/js/components/HttpClient.js";
+import Modal from "../../../../Views/Components/Modal.vue";
+import RichSelectBox from "../../../../Views/Components/RichSelectBox.vue";
+import {PAYMENT_METHOD_ICONS} from "../../../../../resources/js/constants/paymentMethodIcons.js";
+import {toast} from "vue3-toastify";
+import {request} from "../../../../../resources/js/components/HttpClient.js";
 
-    const emit = defineEmits(['close'])
+const emit = defineEmits(['close'])
 
     const props = defineProps({
         event: Object,
     })
 
+// Verfügbare (aktive) Zahlungsarten des Tenants inkl. optionsSchema + Default-Config.
+const availablePaymentMethods = ref([])
+// Auswahl der Zahlungsart-Slugs für dieses Event (Default: leer bei neuen Events).
+const paymentMethods = ref([])
+// pro-Event-Config je Zahlungsmethode: { slug: { option: value } }
+const paymentMethodConfigurations = reactive({})
+
+// Optionen-Modal
+const showOptionsModal = ref(false)
+const optionsMethod = ref(null)
+
+function openOptions(method) {
+    optionsMethod.value = method
+    showOptionsModal.value = true
+}
+
+onMounted(async () => {
+    const response = await fetch('/api/v1/core/retrieve-event-setting-data');
+    const data = await response.json();
+    availablePaymentMethods.value = data.paymentMethods ?? []
+
+    paymentMethods.value = props.event.paymentMethods?.map(t => t.slug) ?? []
+
+    // Pro-Event-Config vorbelegen: bereits gespeicherte Pivot-Config des Events hat Vorrang,
+    // sonst der Tenant-Standard (Snapshot-Quelle für neu zugewiesene Methoden).
+    const eventConfigBySlug = {}
+    for (const pm of props.event.paymentMethods ?? []) {
+        eventConfigBySlug[pm.slug] = pm.configuration ?? {}
+    }
+    for (const method of availablePaymentMethods.value) {
+        const source = eventConfigBySlug[method.slug] ?? method.configuration ?? {}
+        const config = {}
+        for (const option of method.optionsSchema ?? []) {
+            config[option.name] = source[option.name] ?? ''
+        }
+        paymentMethodConfigurations[method.slug] = config
+    }
+})
+
     const errors = reactive({})
     const formData = reactive({
         "pft_1_active": true,
@@ -75,6 +118,24 @@
             return;
         }
 
+        if (paymentMethods.value.length === 0) {
+            toast.error('Mindestens eine Zahlungsmöglichkeit muss ausgewählt sein.')
+            return;
+        }
+
+        const paymentResponse = await request('/api/v1/event/details/' + props.event.id + '/payment-methods', {
+            method: "POST",
+            body: {
+                paymentMethods: paymentMethods.value,
+                paymentMethodConfigurations: paymentMethodConfigurations,
+            }
+        })
+
+        if (paymentResponse.status !== 'success') {
+            toast.error(paymentResponse.message ?? 'Die Zahlungsmöglichkeiten konnten nicht gespeichert werden.')
+            return;
+        }
+
         const data = await request('/api/v1/event/details/' + props.event.id + '/participation-fees', {
             method: "POST",
             body: {
@@ -286,10 +347,81 @@
             </td>
         </tr>
 
+        <tr>
+            <td colspan="4" style="padding-top: 30px;">
+                <h4>Zahlungsmöglichkeiten</h4>
+                <div v-for="paymentMethod in availablePaymentMethods" :key="paymentMethod.slug"
+                     class="payment-method-row">
+                    <input type="checkbox" :id="'paymentmethod' + paymentMethod.id" :value="paymentMethod.slug"
+                           v-model="paymentMethods"/>
+                    <label style="padding-left: 5px;" :for="'paymentmethod' + paymentMethod.id">{{
+                            paymentMethod.name
+                        }}</label>
+                    <label
+                        v-if="paymentMethods.includes(paymentMethod.slug) && (paymentMethod.optionsSchema?.length ?? 0) > 0"
+                        class="link"
+                        style="padding-left: 15px; font-size: 10pt;"
+                        @click="openOptions(paymentMethod)"
+                    >Optionen</label>
+                </div>
+            </td>
+        </tr>
+
         <tr>
             <td colspan="4" style="padding-top: 20px;">
                 <input type="button" value="Speichern" @click="saveParticipationFees" />
             </td>
         </tr>
     </table>
+
+    <Modal
+        v-if="showOptionsModal"
+        :show="showOptionsModal"
+        :title="'Optionen: ' + (optionsMethod?.name ?? '')"
+        width="700px"
+        @close="showOptionsModal = false"
+    >
+        <div v-for="option in optionsMethod?.optionsSchema ?? []" :key="option.name" class="payment-method-config-row">
+            <label>{{ option.label }}<span v-if="option.required" class="required-marker">*</span></label>
+            <RichSelectBox v-if="option.type === 'icon'"
+                           v-model="paymentMethodConfigurations[optionsMethod.slug][option.name]"
+                           :options="PAYMENT_METHOD_ICONS"
+                           placeholder="Symbol wählen…"/>
+            <TextEditor v-else-if="option.type === 'richtext'"
+                        v-model="paymentMethodConfigurations[optionsMethod.slug][option.name]"/>
+            <input v-else type="text"
+                   v-model="paymentMethodConfigurations[optionsMethod.slug][option.name]"
+                   class="width-full"/>
+            <span v-if="option.hint" class="option-hint">{{ option.hint }}</span>
+        </div>
+    </Modal>
 </template>
+
+<style scoped>
+.payment-method-row {
+    margin-bottom: 6px;
+}
+
+.payment-method-config-row {
+    margin-bottom: 12px;
+}
+
+.payment-method-config-row label {
+    display: block;
+    font-size: 0.85rem;
+    color: #374151;
+    margin-bottom: 2px;
+}
+
+.required-marker {
+    color: #ef4444;
+    margin-left: 2px;
+}
+
+.option-hint {
+    display: block;
+    margin-top: 4px;
+    font-size: 0.8rem;
+    color: #6b7280;
+}
+</style>

app/Domains/Event/Views/Partials/SignUpForm/SignupForm.vue

@@ -1,5 +1,5 @@
 <script setup>
-import { useSignupForm } from './composables/useSignupForm.js'
+import {useSignupForm} from './composables/useSignupForm.js'
 import StepAge from './steps/StepAge.vue'
 import StepContactPerson from './steps/StepContactPerson.vue'
 import StepPersonalData from './steps/StepPersonalData.vue'
@@ -8,6 +8,7 @@ import StepArrival from './steps/StepArrival.vue'
 import StepAddons from './steps/StepAddons.vue'
 import StepPhotoPermissions from './steps/StepPhotoPermissions.vue'
 import StepAllergies from './steps/StepAllergies.vue'
+import StepPaymentMethod from './steps/StepPaymentMethod.vue'
 import StepSummary from './steps/StepSummary.vue'
 import SubmitSuccess from './after-submit/SubmitSuccess.vue'
 import SubmitAlreadyExists from './after-submit/SubmitAlreadyExists.vue'
@@ -22,7 +23,7 @@ const emit = defineEmits(['registrationDone'])
 
 const {
     currentStep, goToStep, formData, selectedAddons,
-    submit, submitting, submitResult, summaryLoading, summaryAmount
+    submit, submitting, submitResult, summaryLoading, summaryAmount, summaryAmountValue
 } = useSignupForm(props.event, props.participantData)
 
 const steps = [
@@ -34,7 +35,8 @@ const steps = [
     { step: 6, label: 'Zusatzoptionen' },
     { step: 7, label: 'Fotoerlaubnis' },
     { step: 8, label: 'Allergien' },
-    { step: 9, label: 'Zusammenfassung' },
+    {step: 9, label: 'Zahlungsart'},
+    {step: 10, label: 'Zusammenfassung'},
 ]
 </script>
 
@@ -93,11 +95,14 @@ const steps = [
                 <StepAddons         v-if="currentStep === 6" :formData="formData" :event="event" :selectedAddons="selectedAddons" @next="goToStep" @back="goToStep" />
                 <StepPhotoPermissions v-if="currentStep === 7" :formData="formData" :event="event" @next="goToStep" @back="goToStep" />
                 <StepAllergies      v-if="currentStep === 8" :formData="formData" :event="event" @next="goToStep" @back="goToStep" />
+                <StepPaymentMethod v-if="currentStep === 9" :formData="formData" :event="event" @next="goToStep"
+                                   @back="goToStep"/>
                 <StepSummary
-                    v-if="currentStep === 9"
+                    v-if="currentStep === 10"
                     :formData="formData"
                     :event="event"
                     :summaryAmount="summaryAmount"
+                    :summaryAmountValue="summaryAmountValue"
                     :summaryLoading="summaryLoading"
                     :submitting="submitting"
                     @back="goToStep"

app/Domains/Event/Views/Partials/SignUpForm/after-submit/SubmitSuccess.vue

@@ -26,31 +26,10 @@ const props = defineProps({
             Du hast noch kein erweitertes Führungszeugnis hinterlegt. Bitte reiche es umgehend ein.
         </div>
 
-        <template v-if="props.participant.needs_payment">
+        <!-- Zahlungs-Block kommt vollständig aus dem Zahlungsmodul (registrationSummary -> html). -->
-            <table class="form-table" style="margin-bottom: 16px;">
+        <div v-if="props.participant.paymentSummary?.hasPaymentInformation"
-                <tr>
+             v-html="props.participant.paymentSummary.html"
-                    <td>Kontoinhaber:</td><td>{{ props.event.accountOwner }}</td>
+             style="margin-bottom: 16px;"></div>
-                    <td rowspan="4" style="vertical-align: top; padding-left: 20px;" v-if="props.participant.identifier !== ''">
-                        <img :src="'/print-girocode/' + props.participant.identifier" alt="GiroCode" style="max-width: 180px;" />
-                        <span style="width: 180px; text-align: center; display: block; font-size: 0.8rem; color: #6b7280; margin-top: 4px;">Giro-Code</span>
-                    </td>
-                </tr>
-                <tr><td>IBAN:</td><td>{{ props.event.accountIban }}</td></tr>
-                <tr><td>Verwendungszweck:</td><td>{{ props.participant.payment_purpose }}</td></tr>
-                <tr><td>Betrag:</td><td><strong>{{ props.participant.amount_left_string }}</strong></td></tr>
-                <tr><td>&nbsp;</td><td>
-                    <a class="link" :href="`/api/v1/event/participant/${props.participant.identifier}/ical-payment`">Erinnerung in Kalender setzen</a>
-                </td></tr>
-            </table>
-
-            <p>
-                Bitte beachte, dass deine Anmeldung erst nach Zahlungseiongang vollständig ist.<br />
-                Wenn dieser nicht bis zum {{ props.event.registrationFinalEnd.formatted }} erfolgt, kann deine Anmeldung storniert werden.<br /><br />
-                Solltest du den Beitrag bis zu diesem Datum nicht oder nur teilweise überweisen können, kontaktiere bitte die Aktionsleitung, damit wir eine gemeinsame Lösiung finden können.
-            </p>
-
-
-        </template>
         <p v-else>
             Du musst keinen Beitrag überweisen. Deine Anmeldung ist bestätigt.
         </p>

app/Domains/Event/Views/Partials/SignUpForm/components/PaymentMethodInputs.vue

@@ -0,0 +1,53 @@
+<script setup>
+import TextEditor from "../../../../../../Views/Components/TextEditor.vue";
+
+// Generische, schema-getriebene Eingabefelder eines Zahlungsmoduls. Wiederverwendbar für künftige
+// Verfahren (SEPA, PayPal): das jeweilige Modul liefert das Schema, hier wird nur gerendert.
+const props = defineProps({
+    // [{ name, label, type, required }] -- z.B. aus participantOptionsSchema einer Zahlungsmethode.
+    schema: {type: Array, default: () => []},
+    // v-model: Objekt { optionName: value }
+    modelValue: {type: Object, default: () => ({})},
+})
+const emit = defineEmits(['update:modelValue'])
+
+function setValue(name, value) {
+    emit('update:modelValue', {...props.modelValue, [name]: value})
+}
+</script>
+
+<template>
+    <table class="form-table">
+        <tr v-for="option in schema" :key="option.name">
+            <td>
+                {{ option.label }}<span v-if="option.required" class="required-marker">*</span>:
+            </td>
+            <td>
+                <TextEditor
+                    v-if="option.type === 'richtext'"
+                    :modelValue="modelValue[option.name] ?? ''"
+                    @update:modelValue="value => setValue(option.name, value)"
+                />
+                <input
+                    v-else-if="option.type === 'checkbox'"
+                    type="checkbox"
+                    :checked="modelValue[option.name] ?? false"
+                    @change="event => setValue(option.name, event.target.checked)"
+                />
+                <input
+                    v-else
+                    type="text"
+                    :value="modelValue[option.name] ?? ''"
+                    @input="event => setValue(option.name, event.target.value)"
+                />
+            </td>
+        </tr>
+    </table>
+</template>
+
+<style scoped>
+.required-marker {
+    color: #ef4444;
+    margin-left: 2px;
+}
+</style>

app/Domains/Event/Views/Partials/SignUpForm/composables/useSignupForm.js

@@ -1,4 +1,4 @@
-import { ref, reactive, computed } from 'vue'
+import {reactive, ref} from 'vue'
 import axios from 'axios'
 
 export function useSignupForm(event, participantData) {
@@ -9,8 +9,13 @@ export function useSignupForm(event, participantData) {
 
     const selectedAddons = reactive({})
 
+    // Für die Aktion freigeschaltete Zahlungsmethoden; ist genau eine aktiv, wird sie vorausgewählt.
+    const activeMethods = (event.paymentMethods ?? []).filter(m => m.active)
+
     const formData = reactive({
         eatingHabit: 'EATING_HABIT_VEGAN',
+        paymentMethod: activeMethods.length === 1 ? activeMethods[0].slug : null,
+        paymentOptions: {},
         userId: participantData.id,
         eventId: event.id,
         vorname: participantData.firstname ?? '',
@@ -51,33 +56,52 @@ export function useSignupForm(event, participantData) {
     })
 
     const summaryAmount = ref('')
+    const summaryAmountValue = ref(0)
+
+    const fetchAmount = async () => {
+        summaryLoading.value = true
+        try {
+            const res = await axios.post('/api/v1/event/' + event.id + '/calculate-amount', {
+                arrival: formData.arrival,
+                departure: formData.departure,
+                event_id: event.id,
+                participation_group: formData.participant_group,
+                selected_amount: formData.beitrag,
+                addons: selectedAddons,
+                participationType: formData.participationType,
+                beitrag: formData.beitrag,
+                sibling: formData.sibling,
+            })
+            summaryAmount.value = res.data.amount
+            summaryAmountValue.value = Number(res.data.amountValue ?? 0)
+        } finally {
+            summaryLoading.value = false
+        }
+    }
+
+    // Steps: ... 8 Allergien, 9 Zahlungsart, 10 Zusammenfassung.
+    const STEP_PAYMENT = 9
+    const STEP_SUMMARY = 10
 
     const goToStep = async (step) => {
-        if (step === 9) {
+        if (step === STEP_PAYMENT) {
-            summaryLoading.value = true
+            // Betrag ermitteln: Bei 0 € wird die Zahlungsart-Auswahl übersprungen.
-            summaryAmount.value = ''
+            await fetchAmount()
-            try {
+            if (summaryAmountValue.value <= 0) {
-                const res = await axios.post('/api/v1/event/' + event.id + '/calculate-amount', {
+                formData.paymentMethod = null
-                    arrival: formData.arrival,
+                formData.paymentOptions = {}
-                    departure: formData.departure,
+                currentStep.value = STEP_SUMMARY
-                    event_id: event.id,
+                return
-                    participation_group: formData.participant_group,
-                    selected_amount: formData.beitrag,
-                    addons: selectedAddons,
-                    participationType: formData.participationType,
-                    beitrag: formData.beitrag,
-                    sibling: formData.sibling,
-                })
-               summaryAmount.value = res.data.amount
-            } finally {
-                summaryLoading.value = false
             }
+        } else if (step === STEP_SUMMARY) {
+            await fetchAmount()
         }
         currentStep.value = step
     }
 
     const submit = async () => {
-        if (!formData.summary_information_correct || !formData.summary_accept_terms || !formData.legal_accepted || !formData.payment) {
+        // Zahlungs-Bestätigung wird im Summary-Schritt kontextabhängig erzwungen (nur bei Überweisung).
+        if (!formData.summary_information_correct || !formData.summary_accept_terms || !formData.legal_accepted) {
             return
         }
         submitting.value = true
@@ -95,5 +119,16 @@ export function useSignupForm(event, participantData) {
         }
     }
 
-    return { currentStep, goToStep, formData, selectedAddons, submit, submitting, submitResult, summaryLoading, summaryAmount }
+    return {
+        currentStep,
+        goToStep,
+        formData,
+        selectedAddons,
+        submit,
+        submitting,
+        submitResult,
+        summaryLoading,
+        summaryAmount,
+        summaryAmountValue
+    }
 }

app/Domains/Event/Views/Partials/SignUpForm/steps/StepPaymentMethod.vue

@@ -0,0 +1,226 @@
+<script setup>
+import {computed} from "vue";
+import PaymentMethodInputs from "../components/PaymentMethodInputs.vue";
+import Icon from "../../../../../../Views/Components/Icon.vue";
+
+const props = defineProps({formData: Object, event: Object})
+const emit = defineEmits(['next', 'back'])
+
+// Für die Aktion freigeschaltete Zahlungsmethoden.
+const methods = computed(() => (props.event.paymentMethods ?? []).filter(m => m.active))
+
+const selectedMethod = computed(() =>
+    methods.value.find(m => m.slug === props.formData.paymentMethod) ?? null
+)
+
+const participantSchema = computed(() => selectedMethod.value?.participantOptionsSchema ?? [])
+
+// Font-Awesome-Icon je Zahlungsart: konfiguriertes Symbol hat Vorrang, sonst Slug-Default
+// (Fallback: generische Karte).
+function iconFor(method) {
+    const configured = method.configuration?.icon
+    if (configured) return configured
+    if (method.slug === 'PAYMENT_ACCOUNT_TRANSACTION') return 'building-columns'
+    if (method.slug === 'PAYMENT_NOT_DEFINED') return 'money-bill-wave'
+    return 'credit-card'
+}
+
+function selectMethod(slug) {
+    props.formData.paymentMethod = slug
+    // Eingaben zurücksetzen -- pro Methode eigene Felder.
+    props.formData.paymentOptions = {}
+}
+
+// "Weiter" ist erst möglich, wenn eine Methode gewählt und alle Pflicht-Eingaben befüllt sind.
+const canProceed = computed(() => {
+    if (!props.formData.paymentMethod) return false
+    return participantSchema.value
+        .filter(o => o.required)
+        .every(o => {
+            const value = props.formData.paymentOptions[o.name]
+            return value !== undefined && value !== null && String(value).trim() !== ''
+        })
+})
+</script>
+
+<template>
+    <div>
+        <h3 style="margin: 0 0 6px 0; color: #111827;">Zahlungsweise</h3>
+        <p style="margin: 0 0 24px 0; color: #6b7280; font-size: 0.95rem;">Bitte wähle, wie du deinen Teilnahmebeitrag
+            begleichen möchtest.</p>
+
+        <div class="pay-card-row">
+            <div
+                v-for="method in methods"
+                :key="method.slug"
+                class="pay-card"
+                :class="{ 'pay-card--active': formData.paymentMethod === method.slug }"
+                role="radio"
+                :aria-checked="formData.paymentMethod === method.slug"
+                tabindex="0"
+                @click="selectMethod(method.slug)"
+                @keydown.enter.prevent="selectMethod(method.slug)"
+                @keydown.space.prevent="selectMethod(method.slug)"
+            >
+                <div class="pay-card__badge">
+                    <Icon :name="iconFor(method)"/>
+                </div>
+                <div class="pay-card__body">
+                    <h4 class="pay-card__title">{{ method.name }}</h4>
+                    <p v-if="method.description" class="pay-card__desc">{{ method.description }}</p>
+                </div>
+                <div class="pay-card__check" aria-hidden="true">✓</div>
+            </div>
+        </div>
+
+        <div v-if="participantSchema.length > 0" class="pay-inputs">
+            <PaymentMethodInputs :schema="participantSchema" v-model="formData.paymentOptions"/>
+        </div>
+
+        <div class="btn-row">
+            <button type="button" class="btn-secondary" @click="emit('back', 8)">← Zurück</button>
+            <button type="button" class="btn-primary" :disabled="!canProceed" @click="emit('next', 10)">Weiter →
+            </button>
+        </div>
+    </div>
+</template>
+
+<style scoped>
+.pay-card-row {
+    display: flex;
+    gap: 20px;
+    flex-wrap: wrap;
+}
+
+.pay-card {
+    position: relative;
+    flex: 1 1 280px;
+    min-width: 0;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    background: #f8fafc;
+    border: 2px solid #e5e7eb;
+    border-radius: 12px;
+    padding: 28px 20px;
+    cursor: pointer;
+    transition: border-color 0.15s, box-shadow 0.15s, transform 0.1s;
+    text-align: center;
+}
+
+.pay-card:hover {
+    border-color: #2563eb;
+    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.12);
+    transform: translateY(-2px);
+}
+
+.pay-card--active {
+    border-color: #2563eb;
+    background: #eff6ff;
+    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.12);
+}
+
+.pay-card__badge {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    width: 64px;
+    height: 64px;
+    margin-bottom: 14px;
+    font-size: 1.6rem;
+    color: #2563eb;
+    background: #e0f2fe;
+    border-radius: 50%;
+}
+
+.pay-card--active .pay-card__badge {
+    background: #dbeafe;
+}
+
+.pay-card__body {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    gap: 6px;
+}
+
+.pay-card__title {
+    margin: 0;
+    font-size: 1.1rem;
+    font-weight: 700;
+    color: #111827;
+}
+
+.pay-card__desc {
+    margin: 0;
+    font-size: 0.9rem;
+    color: #374151;
+}
+
+.pay-card__check {
+    position: absolute;
+    top: 12px;
+    right: 12px;
+    width: 24px;
+    height: 24px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    border-radius: 50%;
+    background: #2563eb;
+    color: #fff;
+    font-size: 0.8rem;
+    font-weight: 700;
+    opacity: 0;
+    transform: scale(0.6);
+    transition: opacity 0.12s, transform 0.12s;
+}
+
+.pay-card--active .pay-card__check {
+    opacity: 1;
+    transform: scale(1);
+}
+
+.pay-inputs {
+    margin-top: 20px;
+    padding: 16px;
+    background: #f8fafc;
+    border: 1px solid #e5e7eb;
+    border-radius: 10px;
+}
+
+/* ─── Smartphone ─── */
+@media (max-width: 639px) {
+    .pay-card-row {
+        flex-direction: column;
+        gap: 12px;
+    }
+
+    .pay-card {
+        flex: 1 1 100%;
+        flex-direction: row;
+        text-align: left;
+        align-items: center;
+        gap: 14px;
+        padding: 16px 14px;
+    }
+
+    .pay-card__badge {
+        flex: 0 0 52px;
+        width: 52px;
+        height: 52px;
+        margin-bottom: 0;
+        font-size: 1.6rem;
+    }
+
+    .pay-card__body {
+        flex: 1;
+        align-items: flex-start;
+        text-align: left;
+    }
+
+    .pay-card__title {
+        font-size: 1rem;
+    }
+}
+</style>

app/Domains/Event/Views/Partials/SignUpForm/steps/StepSummary.vue

@@ -1,15 +1,48 @@
 <script setup>
+import {computed} from "vue";
 import {format, parseISO} from "date-fns";
 
+const PAYMENT_ACCOUNT_TRANSACTION = 'PAYMENT_ACCOUNT_TRANSACTION'
+
 const props = defineProps({
     formData: Object,
     event: Object,
     summaryAmount: String,
+    summaryAmountValue: {type: Number, default: 0},
     summaryLoading: Boolean,
     submitting: Boolean,
 })
 const emit = defineEmits(['back', 'submit'])
 
+const selectedMethod = computed(() =>
+    (props.event.paymentMethods ?? []).find(m => m.slug === props.formData.paymentMethod) ?? null
+)
+
+// Die Überweisungs-Bestätigung wird nur bei Banküberweisung verlangt (AC #6).
+const requiresPaymentConfirmation = computed(() =>
+    props.formData.paymentMethod === PAYMENT_ACCOUNT_TRANSACTION
+)
+
+// Bestätigungstext ist ein admin-konfigurierbarer Freitext ({amount}-Platzhalter), sonst Default.
+const paymentConfirmationText = computed(() => {
+    const configured = selectedMethod.value?.configuration?.summary_confirmation_text
+    const template = (configured && String(configured).trim() !== '')
+        ? configured
+        : 'Ich bestätige, den Betrag von {amount} zu überweisen.'
+    return template.replaceAll('{amount}', props.summaryAmount ?? '')
+})
+
+// Zurück führt zur Zahlungsart (9), sofern dieser Schritt gezeigt wurde; bei 0 € direkt zu Allergien (8).
+const backTarget = computed(() => props.summaryAmountValue > 0 ? 9 : 8)
+
+const canSubmit = computed(() =>
+    props.formData.summary_information_correct
+    && props.formData.summary_accept_terms
+    && props.formData.legal_accepted
+    && (!requiresPaymentConfirmation.value || props.formData.payment)
+    && !props.submitting
+)
+
 function formatDate(dateString) {
     if (!dateString) return ''
     return format(parseISO(dateString), 'dd.MM.yyyy')
@@ -129,18 +162,18 @@ function eatingHabit() {
                     <input type="checkbox" v-model="formData.legal_accepted" />
                     Ich stimme der Datenschutzerklärung zu.
                 </label>
-                <label style="display: flex; gap: 10px; cursor: pointer;">
+                <label v-if="requiresPaymentConfirmation" style="display: flex; gap: 10px; cursor: pointer;">
                     <input type="checkbox" v-model="formData.payment" />
-                    Ich bestätige, den Betrag von <strong>{{ summaryAmount }}</strong> zu überweisen.
+                    {{ paymentConfirmationText }}
                 </label>
             </div>
 
             <div class="btn-row">
-                <button type="button" class="btn-secondary" @click="emit('back', 8)">← Zurück</button>
+                <button type="button" class="btn-secondary" @click="emit('back', backTarget)">← Zurück</button>
                 <button
                     type="submit"
                     class="btn-primary"
-                    :disabled="!formData.summary_information_correct || !formData.summary_accept_terms || !formData.legal_accepted || !formData.payment || submitting"
+                    :disabled="!canSubmit"
                     style="background: #059669;"
                 >
                     {{ submitting ? 'Wird gesendet…' : 'Jetzt anmelden ✓' }}

app/Enumerations/PaymentStatus.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Enumerations;
+
+use App\Scopes\CommonModel;
+
+/**
+ * Lebenszyklus-Status einer Zahlung -- DB-gestützt, analog zu {@see InvoiceStatus}.
+ * Reine Steuersignale (z.B. Redirect) gehören NICHT hierher, sondern bleiben transiente
+ * Felder auf {@see \App\EventPaymentModules\DTO\DoPaymentResponse}.
+ */
+class PaymentStatus extends CommonModel
+{
+    public const PAYMENT_STATUS_PENDING = 'pending';
+    public const PAYMENT_STATUS_SCHEDULED = 'scheduled';
+    public const PAYMENT_STATUS_PAID = 'paid';
+    public const PAYMENT_STATUS_FAILED = 'failed';
+
+    protected $table = 'payment_status';
+
+    protected $fillable = [
+        'slug',
+    ];
+}

app/Enumerations/TaxExemptionReason.php

@@ -0,0 +1,67 @@
+<?php
+
+namespace App\Enumerations;
+
+/**
+ * Gründe für eine Umsatzsteuerbefreiung. Jeder Fall kapselt sein UI-Label und den auf der Rechnung
+ * verpflichtenden Hinweis nach § 14 Abs. 4 Nr. 8 UStG, damit Label und Text nur an einer Stelle
+ * gepflegt werden. Gemeinnützigkeit allein befreit nicht – die Befreiung braucht immer einen konkreten
+ * Rechtsgrund; die Vereins-Fälle sind über § 4 Nr. 22a / Nr. 25 abgedeckt.
+ */
+enum TaxExemptionReason: string
+{
+    case SmallBusiness = 'small_business';
+    case Education = 'education';
+    case YouthWelfare = 'youth_welfare';
+    case Custom = 'custom';
+
+    public function label(): string
+    {
+        return match ($this) {
+            self::SmallBusiness => 'Kleinunternehmer (§ 19 UStG)',
+            self::Education => 'Bildungs-/Kursleistung (§ 4 Nr. 22a UStG)',
+            self::YouthWelfare => 'Kinder- und Jugendhilfe (§ 4 Nr. 25 UStG)',
+            self::Custom => 'Sonstiger Grund (Freitext)',
+        };
+    }
+
+    /**
+     * Pflichthinweis für die Rechnung. Bei einem individuellen Grund (Custom) wird der hinterlegte
+     * Freitext des Tenants verwendet.
+     */
+    public function invoiceText(?string $customNote = null): string
+    {
+        return match ($this) {
+            self::SmallBusiness => 'Gemäß § 19 UStG wird keine Umsatzsteuer berechnet.',
+            self::Education => 'Die Leistung ist gemäß § 4 Nr. 22 Buchst. a UStG von der Umsatzsteuer befreit.',
+            self::YouthWelfare => 'Die Leistung ist gemäß § 4 Nr. 25 UStG von der Umsatzsteuer befreit.',
+            self::Custom => trim((string)$customNote),
+        };
+    }
+
+    /**
+     * Ob dieser Grund einen zusätzlichen Freitext des Tenants erfordert.
+     */
+    public function requiresNote(): bool
+    {
+        return $this === self::Custom;
+    }
+
+    /**
+     * Optionen für das Frontend inkl. Vorschau-Text. Bei Custom ist `text` leer, da der Text erst aus
+     * dem Freitext des Tenants entsteht.
+     *
+     * @return array<int, array{value: string, label: string, text: string}>
+     */
+    public static function options(): array
+    {
+        return array_map(
+            static fn(self $reason): array => [
+                'value' => $reason->value,
+                'label' => $reason->label(),
+                'text' => $reason->requiresNote() ? '' : $reason->invoiceText(),
+            ],
+            self::cases(),
+        );
+    }
+}

app/EventPaymentModules/AbstractEventPaymentModule.php

@@ -0,0 +1,176 @@
+<?php
+
+namespace App\EventPaymentModules;
+
+use App\Enumerations\PaymentStatus;
+use App\EventPaymentModules\DTO\CreateInvoiceRequest;
+use App\EventPaymentModules\DTO\CreateInvoiceResponse;
+use App\EventPaymentModules\DTO\DoPaymentRequest;
+use App\EventPaymentModules\DTO\DoPaymentResponse;
+use App\EventPaymentModules\DTO\RegistrationSummaryRequest;
+use App\EventPaymentModules\DTO\RegistrationSummaryResponse;
+
+/**
+ * Gemeinsame Basis aller Zahlungsmodule. Hält den geteilten Code und die aus {@see getOptions()}
+ * abgeleiteten Options-Helfer; konkrete Module definieren nur ihre Identität, ihr Options-Schema
+ * und -- später -- die je Zahlungsart variierenden Teile (z.B. den Rechnungs-Schlusssatz).
+ */
+abstract class AbstractEventPaymentModule implements EventPaymentModule
+{
+    public function defaultDescription(): ?string
+    {
+        return null;
+    }
+
+    /**
+     * Standard-Konfiguration beim Anlegen der Tenant-Instanz. Standard: leer.
+     *
+     * @return array<string, mixed>
+     */
+    public function defaultConfiguration(): array
+    {
+        return [];
+    }
+
+    /**
+     * Payer-seitige Eingaben, die eine Zahlungsart vom Teilnehmer benötigt (z.B. später SEPA-IBAN,
+     * PayPal-Mail). Standard: keine. Gleiche Form wie getOptions(): [{name,label,type,required}].
+     *
+     * @return array<int, array{name: string, label: string, type: string, required: bool}>
+     */
+    public function getParticipantOptions(): array
+    {
+        return [];
+    }
+
+    // -----------------------------------------------------------------------------------------
+    // Aus dem jeweiligen Schema abgeleitete Helfer (Admin-Config = getOptions(),
+    // Teilnehmer-Eingaben = getParticipantOptions()).
+    // -----------------------------------------------------------------------------------------
+
+    /** @return array<int, string> */
+    public function requiredOptionKeys(): array
+    {
+        return $this->requiredKeys($this->getOptions());
+    }
+
+    /**
+     * @param array<string, mixed> $config
+     * @return array<string, mixed>
+     */
+    public function sanitizeConfiguration(array $config): array
+    {
+        return $this->sanitizeAgainst($this->getOptions(), $config);
+    }
+
+    /** @param array<string, mixed> $config */
+    public function isConfigurationComplete(array $config): bool
+    {
+        return $this->allRequiredFilled($this->getOptions(), $config);
+    }
+
+    /**
+     * @param array<string, mixed> $input
+     * @return array<string, mixed>
+     */
+    public function sanitizeParticipantOptions(array $input): array
+    {
+        return $this->sanitizeAgainst($this->getParticipantOptions(), $input);
+    }
+
+    /** @param array<string, mixed> $input */
+    public function participantOptionsComplete(array $input): bool
+    {
+        return $this->allRequiredFilled($this->getParticipantOptions(), $input);
+    }
+
+    /**
+     * @param array<int, array{name: string, required?: bool}> $schema
+     * @return array<int, string>
+     */
+    private function requiredKeys(array $schema): array
+    {
+        return array_values(array_map(
+            static fn (array $option) => $option['name'],
+            array_filter($schema, static fn(array $option) => $option['required'] ?? false)
+        ));
+    }
+
+    /**
+     * Reduziert Eingaben auf die im Schema definierten Keys (unbekannte werden verworfen).
+     *
+     * @param array<int, array{name: string}> $schema
+     * @param array<string, mixed> $input
+     * @return array<string, mixed>
+     */
+    private function sanitizeAgainst(array $schema, array $input): array
+    {
+        $result = [];
+        foreach ($schema as $option) {
+            if (array_key_exists($option['name'], $input)) {
+                $result[$option['name']] = $input[$option['name']];
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * Sind alle Pflichtfelder des Schemas befüllt (non-empty)?
+     *
+     * @param array<int, array{name: string, required?: bool}> $schema
+     * @param array<string, mixed> $input
+     */
+    private function allRequiredFilled(array $schema, array $input): bool
+    {
+        foreach ($this->requiredKeys($schema) as $key) {
+            $value = $input[$key] ?? null;
+            if ($value === null || $value === '' || $value === []) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    // -----------------------------------------------------------------------------------------
+    // Operative Methoden -- in dieser Iteration bewusst als Stubs.
+    // -----------------------------------------------------------------------------------------
+
+    public function registrationSummary(RegistrationSummaryRequest $request): RegistrationSummaryResponse
+    {
+        // TODO: In einer Folge-Iteration ausformulieren (zahlungsspezifischer Teil der Zusammenfassung).
+        return new RegistrationSummaryResponse();
+    }
+
+    public function doPayment(DoPaymentRequest $request): DoPaymentResponse
+    {
+        // TODO: In einer Folge-Iteration ausformulieren. Default: nichts aktiv anzustoßen (Status offen).
+        $response = new DoPaymentResponse();
+        $response->success = true;
+        $response->status = PaymentStatus::PAYMENT_STATUS_PENDING;
+
+        return $response;
+    }
+
+    /**
+     * Template-Method: Der gemeinsame Rechnungs-Rumpf wird hier gebaut, der variierende Schlusssatz
+     * kommt aus {@see invoiceClosingStatement()} des jeweiligen Moduls.
+     */
+    public function createInvoice(CreateInvoiceRequest $request): CreateInvoiceResponse
+    {
+        $response = new CreateInvoiceResponse();
+        // TODO: In einer Folge-Iteration den gemeinsamen Rumpf (Betrag, Leistung, Teilnehmerdaten) befüllen
+        //       und an die Invoice-Domain anbinden.
+        $response->success = true;
+        $response->closingStatement = $this->invoiceClosingStatement($request);
+
+        return $response;
+    }
+
+    /**
+     * Der je Zahlungsart variierende Schlusssatz der Rechnung
+     * ("Bitte überweise bis ..." / "wird abgebucht ..." / "wurde per PayPal beglichen").
+     */
+    abstract protected function invoiceClosingStatement(CreateInvoiceRequest $request): string;
+}

app/EventPaymentModules/CLAUDE.md

@@ -0,0 +1,123 @@
+# Zahlungsmodule (`app/EventPaymentModules`)
+
+Interface-gesteuerte Strategie-Schicht: Das Verhalten je Zahlungsart (Optionen, Anmelde-Zusammenfassung, Zahlung,
+Rechnung) liegt gekapselt in einem Modul pro Zahlungsart. Aufgelöst wird über den Slug.
+
+## Aufbau
+
+- `EventPaymentModule` — **Core-Interface**. Hält nur das, was **jede** Zahlungsart hat:
+  `slug()`, `defaultName()/defaultDescription()`, `getOptions()`, `registrationSummary()`, `doPayment()`,
+  `createInvoice()`.
+- `AbstractEventPaymentModule` — Basisklasse (Template-Method). Liefert die aus `getOptions()` abgeleiteten Helfer
+  (`requiredOptionKeys()`, `sanitizeConfiguration()`, `isConfigurationComplete()`) und sinnvolle Default-/Stub-Bodies.
+- `Modules/` — konkrete Module (flach, eine Klasse je Zahlungsart):
+  `AccountTransferPaymentModule` (Überweisung), `UndefinedPaymentModule` (Barzahlung/Sonstiges).
+- `DTO/` — geteilte Request/Response-DTOs je Operation (`DoPayment*`, `CreateInvoice*`, `RegistrationSummary*`).
+- `EventPaymentModuleRegistry` — statische Map `slug → Modul-Instanz` (`forSlug()`, `all()`, `slugs()`). **Neue Module
+  hier eintragen.** Kein Container-Binding.
+- `ProvidesGiroCode` — **Fähigkeits-Interface** (siehe unten).
+
+## Kernregeln
+
+- **Zwei getrennte Options-Schemata (beide im Code, gleiche Form `['name','label','type','required']`):**
+    - `getOptions()` = **Admin-Config** (was der/die Veranstalter\*in pflegt, z.B. Empfänger-Konto). Werte in der DB
+      (`configuration`, s.u.).
+    - `getParticipantOptions()` = **Teilnehmer-Eingaben** beim Anmelden (payer-seitig, z.B. künftig
+      SEPA-IBAN/PayPal-Mail; beide Bestandsmodule: `[]`). Werte in `event_participants.payment_options` (JSON).
+      Abgesichert über
+      `sanitizeParticipantOptions()` / `participantOptionsComplete()` (Guard im `SignUpCommand`).
+    - `type` ist i.d.R. `'string'`; `'richtext'` wird über `Views/Components/TextEditor.vue` (TinyMCE, HTML) gerendert
+      und via `v-html`/`{!! !!}` ausgegeben; `'icon'` rendert die `Views/Components/RichSelectBox.vue` (kuratierte
+      FA-Symbol-Auswahl, Liste in `resources/js/constants/paymentMethodIcons.js`). Teilnehmer-Eingaben rendert die
+      generische `SignUpForm/components/PaymentMethodInputs.vue` schema-getrieben.
+  - Optionaler Schlüssel `'hint'` je Option: erklärender Hilfetext, den die Admin-Render-Stellen unter dem Feld anzeigen
+    (z.B. bei `payment_information`, dass der Text am Anmeldeende + in der Mail erscheint).
+  - `defaultConfiguration()` je Modul liefert die Start-Config beim Anlegen der Tenant-Instanz (`CreateTenantAction`),
+    aktuell das Default-Symbol (`icon`): Überweisung `building-columns`, Sonstiges `coins`.
+- **Aktivierungs-Guard:** Eine Tenant-Zahlungsmethode darf nur `active` werden, wenn alle `required`-Optionen befüllt
+  sind (`isConfigurationComplete()`), erzwungen in `UpdateAvailablePaymentMethodAction`.
+- **Config-Speicherung (JSON):** pro Tenant auf `available_payment_methods.configuration`, pro Event auf dem Pivot
+  `event_payment_methods.configuration`. Beim Zuweisen an ein Event wird die Tenant-Config als **Snapshot kopiert**
+  (Copy-on-Assign, spätere Tenant-Änderungen wirken NICHT nach). Sync erfolgt differenziell in
+  `SetPaymentMethodsCommand` (Endpoint `/api/v1/event/details/{event}/payment-methods`, ausgelöst aus dem
+  „Teilnahmegebühren"-Bereich).
+- **`PaymentMethod` ist nur eine Fassade:** `PaymentMethod::optionsFor/participantOptionsFor/requiredOptionKeys/`
+  `sanitizeConfiguration/isConfigurationComplete/defaults()` delegieren an die Registry. Bestehende Aufrufstellen
+  bleiben stabil.
+- **Zahlungsauswahl im Anmeldeprozess:** Nach „Allergien" wählt der/die Teilnehmer\*in aus den **aktiven**
+  Event-Methoden (`StepPaymentMethod.vue`); bei Beitrag 0 € wird der Schritt übersprungen. Die Wahl landet in
+  `event_participants.payment_method`, die Eingaben in `payment_options`. Der Überweisungs-Bestätigungstext in der
+  Zusammenfassung ist eine Admin-Config-Option `summary_confirmation_text` (`{amount}`-Platzhalter) und erscheint nur
+  bei
+  `PAYMENT_ACCOUNT_TRANSACTION`.
+- **`PaymentStatus`** ist ein DB-gestütztes Enumerations-Model (`app/Enumerations/PaymentStatus.php`, Tabelle
+  `payment_status`, geseedet in `ProductionDataSeeder`), analog zu `InvoiceStatus`. Reine Steuersignale (z.B. Redirect)
+  gehören NICHT ins Status-Vokabular, sondern als transiente Felder aufs Response-DTO.
+- `doPayment()` und `createInvoice()` sind aktuell **Stubs** (nur Struktur/DTOs vorhanden). `createInvoice()` ist als
+  Template-Method angelegt: gemeinsamer Rumpf in der Basis, `invoiceClosingStatement()` je Modul.
+
+## Zahlart-spezifisches Verhalten → Fähigkeits-Interfaces (Interface Segregation)
+
+Verhalten, das **nur eine** Zahlungsart hat, gehört **nicht** auf `EventPaymentModule` und **nicht** auf das generische
+`EventParticipant`-Model, sondern in ein schmales Fähigkeits-Interface, das nur das betreffende Modul implementiert.
+Aufrufer prüfen per `instanceof`.
+
+Beispiel GiroCode (nur Überweisung):
+
+- `ProvidesGiroCode::giroCode(EventParticipant, array $configuration): ?string` — implementiert **nur** von
+  `AccountTransferPaymentModule`.
+- Aufrufer (`GiroCodeGetController`, `EventSignUpSuccessfullMail`, `ParticipantPaymentMissingPaymentMail`) lösen inline
+  auf:
+  ```php
+  $module = $participant->paymentModule();
+  $binary = $module instanceof ProvidesGiroCode
+      ? $module->giroCode($participant, $participant->paymentConfiguration())
+      : null;
+  ```
+- Künftige Verfahren würden analog eigene Fähigkeiten mitbringen (z.B. `ProvidesRedirect` für PayPal,
+  `ProvidesMandate` für SEPA-Lastschrift) — **erst modellieren, wenn tatsächlich gebraucht.**
+
+## Anmelde-Zusammenfassung / Mail-Anzeige
+
+- `registrationSummary(RegistrationSummaryRequest): RegistrationSummaryResponse` liefert den zahlungsspezifischen
+  Anzeige-Block **fertig als HTML** (`hasPaymentInformation` + `html`). Jedes Modul rendert seinen Block über
+  eigene Blade-Templates unter `resources/views/payment-modules/{modul}/{web,mail}.blade.php` (Überweisung:
+  `account-transfer/`, Barzahlung: `undefined/` — Rahmen um den konfigurierten richtext). Die Render-Stellen geben
+  nur noch `v-html` / `{!! !!}` aus — **keine** zahlart-spezifische Logik im Frontend/Blade.
+- **Render-Kontext:** `RegistrationSummaryRequest` trägt einen `RegistrationRenderContext` (`Web`/`Mail`). Das Modul
+  wählt darüber (a) ein **medien-gerechtes Template** — `resources/views/payment-modules/{modul}/{web,mail}.blade.php`
+  (Web: SPA-Klassen `form-table`/`link`; Mail: E-Mail-taugliche Inline-Styles) und (b) die GiroCode-Bildquelle —
+  Web: `/print-girocode/{token}` (sessionlos, lazy), Mail: `cid:girocode.png` (inline via `$message->embedData(...)`,
+  bereitgestellt im dünnen Wrapper `emails/subparts/payment.blade.php`).
+  Hinweis: Das Web-Template darf globale (un-scoped) SPA-Klassen nutzen, da Vue-`scoped`-Styles nicht auf `v-html`
+  greifen.
+- Zugang über das Teilnehmer-Model: `EventParticipant::paymentModule()`, `paymentConfiguration()` (eager-load-fähig über
+  `->with('event.paymentMethods')`, kein statischer Cache), `paymentSummary(RegistrationRenderContext)`.
+- Konsumiert von `EventParticipantResource` (`paymentSummary` = `{hasPaymentInformation, html}`, Web-Kontext),
+  `SubmitSuccess.vue`, den Mails (`EventSignUpSuccessfullMail`/`ParticipantPaymentMissingPaymentMail` rufen
+  `paymentSummary(Mail)`), sowie `signup_complete`/`missing_amount` (nur umrahmende Prosa, gegated auf
+  `hasPaymentInformation`).
+
+## Neues Zahlungsmodul hinzufügen
+
+1. Klasse unter `Modules/` anlegen, `extends AbstractEventPaymentModule`; `slug()`, `defaultName()`, `getOptions()`
+   implementieren; `defaultConfiguration()` (z.B. Default-`icon`) sowie
+   `registrationSummary()`/`doPayment()`/`createInvoice()` überschreiben, wo nötig.
+2. Zahlart-spezifische Extras als **eigenes Fähigkeits-Interface** (nicht ins Core-Interface).
+3. In `EventPaymentModuleRegistry::MODULES` eintragen. `PaymentMethod::create(['slug' => …])` wird dann automatisch über
+   `ProductionDataSeeder` (iteriert `EventPaymentModuleRegistry::slugs()`) geseedet.
+4. Slug-Konstante bei Bedarf auf `PaymentMethod` ergänzen.
+
+## Datenübernahme
+
+`storage/app/2026_08_05_backfill_payment_method_configuration.sql` überführt einmalig Bestands-IBAN-Daten (Tenant/Event)
+**und** die Default-Symbole in die Modul-Config (idempotenter JSON-Merge, nichts wird überschrieben). Bei
+Live-Inbetriebnahme einmal gegen die Produktionsdatenbank ausführen — ersetzt das ältere PHP-Skript
+`sync_payment_bank_data.php`.
+
+## Tests
+
+`tests/Unit/PaymentMethodOptionsTest`, `tests/Unit/EventPaymentModuleRegistryTest`,
+`tests/Unit/RegistrationSummaryTest`, `tests/Feature/PaymentMethodConfigurationTest`,
+`tests/Feature/EventParticipantPaymentSummaryTest`. Ausführung im Container (PHP 8.5):
+`docker exec mareike-mareike-app-1 php artisan test`.

app/EventPaymentModules/DTO/CreateInvoiceRequest.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\EventPaymentModules\DTO;
+
+use App\Models\Event;
+use App\Models\EventParticipant;
+use App\ValueObjects\Amount;
+
+/**
+ * Eingabe für {@see \App\EventPaymentModules\EventPaymentModule::createInvoice()}.
+ * Von allen Modulen geteilt.
+ */
+final class CreateInvoiceRequest
+{
+    /**
+     * @param array<string, mixed> $configuration Aufgelöste (pro-Event-)Konfiguration des Moduls.
+     */
+    public function __construct(
+        public readonly Event $event,
+        public readonly EventParticipant $participant,
+        public readonly Amount $amount,
+        public readonly array $configuration = [],
+    ) {
+    }
+}

app/EventPaymentModules/DTO/CreateInvoiceResponse.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\EventPaymentModules\DTO;
+
+/**
+ * Ausgabe von {@see \App\EventPaymentModules\EventPaymentModule::createInvoice()}.
+ *
+ * Der gemeinsame Rechnungs-Rumpf (Betrag, Leistung, ...) wird von der Basisklasse befüllt,
+ * $closingStatement ist der je Modul variierende Schlusssatz
+ * ("Bitte überweise bis ..." / "wird abgebucht ..." / "wurde per PayPal beglichen").
+ */
+final class CreateInvoiceResponse
+{
+    public bool $success = false;
+
+    /** @var array<int, array<string, mixed>> Gemeinsame Rechnungspositionen (Rumpf). */
+    public array $lines = [];
+
+    public ?string $closingStatement = null;
+    public ?string $message = null;
+}

app/EventPaymentModules/DTO/DoPaymentRequest.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\EventPaymentModules\DTO;
+
+use App\Models\Event;
+use App\Models\EventParticipant;
+use App\ValueObjects\Amount;
+
+/**
+ * Eingabe für {@see \App\EventPaymentModules\EventPaymentModule::doPayment()}.
+ * Von allen Modulen geteilt.
+ */
+final class DoPaymentRequest
+{
+    /**
+     * @param array<string, mixed> $configuration Aufgelöste (pro-Event-)Konfiguration des Moduls.
+     */
+    public function __construct(
+        public readonly Event $event,
+        public readonly EventParticipant $participant,
+        public readonly Amount $amount,
+        public readonly array $configuration = [],
+    ) {
+    }
+}

app/EventPaymentModules/DTO/DoPaymentResponse.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace App\EventPaymentModules\DTO;
+
+use App\Enumerations\PaymentStatus;
+
+/**
+ * Ausgabe von {@see \App\EventPaymentModules\EventPaymentModule::doPayment()}.
+ * Von allen Modulen geteilt -- jedes Modul befüllt nur die für es relevanten Felder.
+ *
+ * $status ist ein Lebenszyklus-Status (PaymentStatus-Slug, DB-gestützt). Reine Steuersignale
+ * wie ein Redirect bleiben transiente Felder (redirectUrl), nicht Teil des Status-Vokabulars.
+ */
+final class DoPaymentResponse
+{
+    public bool $success = false;
+    public string $status = PaymentStatus::PAYMENT_STATUS_PENDING;
+    public ?string $redirectUrl = null;
+    public ?\DateTimeImmutable $scheduledFor = null;
+    public ?string $reference = null;
+    public ?string $message = null;
+}

app/EventPaymentModules/DTO/RegistrationRenderContext.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace App\EventPaymentModules\DTO;
+
+/**
+ * Render-Kontext der Anmelde-Zusammenfassung. Steuert die kontextabhängige Einbettung des GiroCodes:
+ * im Web über den Endpoint, in der Mail über eine inline-CID.
+ */
+enum RegistrationRenderContext
+{
+    case Web;
+    case Mail;
+}

app/EventPaymentModules/DTO/RegistrationSummaryRequest.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\EventPaymentModules\DTO;
+
+use App\Models\EventParticipant;
+
+/**
+ * Eingabe für {@see \App\EventPaymentModules\EventPaymentModule::registrationSummary()}.
+ *
+ * Anker ist der (bereits erstellte) Teilnehmer -- daraus leiten die Module Event, Betrag/Restbetrag
+ * und Verwendungszweck ab. $configuration ist die aufgelöste pro-Event-Config des Zahlungsmoduls,
+ * $context steuert die kontextabhängige Ausgabe (z.B. GiroCode-Einbettung Web vs. Mail).
+ */
+final class RegistrationSummaryRequest
+{
+    /**
+     * @param array<string, mixed> $configuration
+     */
+    public function __construct(
+        public readonly EventParticipant $participant,
+        public readonly array $configuration = [],
+        public readonly RegistrationRenderContext $context = RegistrationRenderContext::Web,
+    ) {
+    }
+}

app/EventPaymentModules/DTO/RegistrationSummaryResponse.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\EventPaymentModules\DTO;
+
+/**
+ * Ausgabe von {@see \App\EventPaymentModules\EventPaymentModule::registrationSummary()}.
+ *
+ * Das Modul erzeugt seinen Zahlungs-Block vollständig als HTML; die Render-Stellen (Anmeldeabschluss,
+ * Mails) geben ihn nur noch per `v-html` / `{!! !!}` aus.
+ */
+final class RegistrationSummaryResponse
+{
+    /** Gibt es überhaupt einen Zahlungs-Block darzustellen? */
+    public bool $hasPaymentInformation = false;
+
+    /** Fertig gerenderter HTML-Block der Zahlungsinformationen. */
+    public string $html = '';
+}

app/EventPaymentModules/EventPaymentModule.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace App\EventPaymentModules;
+
+use App\EventPaymentModules\DTO\CreateInvoiceRequest;
+use App\EventPaymentModules\DTO\CreateInvoiceResponse;
+use App\EventPaymentModules\DTO\DoPaymentRequest;
+use App\EventPaymentModules\DTO\DoPaymentResponse;
+use App\EventPaymentModules\DTO\RegistrationSummaryRequest;
+use App\EventPaymentModules\DTO\RegistrationSummaryResponse;
+
+/**
+ * Vertrag eines Zahlungsmoduls. Jede Zahlungsart (Überweisung, künftig SEPA-Lastschrift, PayPal, ...)
+ * kapselt ihr Verhalten in einer eigenen Implementierung. Aufgelöst wird ein Modul über seinen Slug
+ * via {@see EventPaymentModuleRegistry}.
+ *
+ * Die operativen Methoden (doPayment/createInvoice/registrationSummary) arbeiten mit geteilten
+ * Request/Response-DTOs -- das Modul stellt die polymorphe "Command"-Logik; schwere Arbeit
+ * (PayPal-API, SEPA-XML) wird später an reguläre Domain-Actions delegiert.
+ */
+interface EventPaymentModule
+{
+    /** Eindeutiger Slug der Zahlungsart (entspricht payment_methods.slug). */
+    public static function slug(): string;
+
+    /** Standard-Anzeigename beim Anlegen der Tenant-Instanz. */
+    public function defaultName(): string;
+
+    /** Standard-Beschreibung beim Anlegen der Tenant-Instanz. */
+    public function defaultDescription(): ?string;
+
+    /**
+     * Standard-Konfiguration beim Anlegen der Tenant-Instanz (z.B. Default-Symbol). Standard: leer.
+     *
+     * @return array<string, mixed>
+     */
+    public function defaultConfiguration(): array;
+
+    /**
+     * Admin-Options-Schema dieses Moduls (welche Konfigurationsfelder der/die Veranstalter\*in pflegt).
+     *
+     * @return array<int, array{name: string, label: string, type: string, required: bool}>
+     */
+    public function getOptions(): array;
+
+    /**
+     * Teilnehmer-Eingaben, die diese Zahlungsart beim Anmelden abfragt (payer-seitig; Standard: keine).
+     *
+     * @return array<int, array{name: string, label: string, type: string, required: bool}>
+     */
+    public function getParticipantOptions(): array;
+
+    /**
+     * Liefert den zahlungsspezifischen Teil der Anmelde-Zusammenfassung.
+     * (In dieser Iteration nur als Stub vorhanden.)
+     */
+    public function registrationSummary(RegistrationSummaryRequest $request): RegistrationSummaryResponse;
+
+    /**
+     * Stößt die Zahlung an (bzw. beschreibt, was zu tun ist -- z.B. Redirect, Lastschrift, manuelle Überweisung).
+     * (In dieser Iteration nur als Stub vorhanden.)
+     */
+    public function doPayment(DoPaymentRequest $request): DoPaymentResponse;
+
+    /**
+     * Erzeugt die Rechnung/Zahlungsaufforderung. Der gemeinsame Rumpf kommt aus der Basisklasse,
+     * nur der Schlusssatz variiert je Modul.
+     * (In dieser Iteration nur als Stub vorhanden.)
+     */
+    public function createInvoice(CreateInvoiceRequest $request): CreateInvoiceResponse;
+}

app/EventPaymentModules/EventPaymentModuleRegistry.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace App\EventPaymentModules;
+
+use App\EventPaymentModules\Modules\AccountTransferPaymentModule;
+use App\EventPaymentModules\Modules\UndefinedPaymentModule;
+
+/**
+ * Zentrale Auflösung Slug -> Zahlungsmodul. Neue Zahlungsarten werden hier eingetragen.
+ * Bewusst statisch + manuelle Instanziierung (kein Container-Binding), passend zum Projektstil.
+ */
+class EventPaymentModuleRegistry
+{
+    /**
+     * Alle registrierten Modul-Klassen. Reihenfolge bestimmt u.a. die Seed-Reihenfolge.
+     *
+     * @var array<int, class-string<EventPaymentModule>>
+     */
+    private const MODULES = [
+        AccountTransferPaymentModule::class,
+        UndefinedPaymentModule::class,
+    ];
+
+    /** @var array<string, EventPaymentModule>|null Lazy gecachte Instanzen (slug => Modul). */
+    private static ?array $instances = null;
+
+    /**
+     * @return array<string, EventPaymentModule>
+     */
+    public static function all(): array
+    {
+        if (self::$instances === null) {
+            self::$instances = [];
+            foreach (self::MODULES as $moduleClass) {
+                self::$instances[$moduleClass::slug()] = new $moduleClass();
+            }
+        }
+
+        return self::$instances;
+    }
+
+    public static function forSlug(string $slug): ?EventPaymentModule
+    {
+        return self::all()[$slug] ?? null;
+    }
+
+    /**
+     * @return array<int, string>
+     */
+    public static function slugs(): array
+    {
+        return array_keys(self::all());
+    }
+}

app/EventPaymentModules/Modules/AccountTransferPaymentModule.php

@@ -0,0 +1,112 @@
+<?php
+
+namespace App\EventPaymentModules\Modules;
+
+use App\EventPaymentModules\AbstractEventPaymentModule;
+use App\EventPaymentModules\DTO\CreateInvoiceRequest;
+use App\EventPaymentModules\DTO\RegistrationRenderContext;
+use App\EventPaymentModules\DTO\RegistrationSummaryRequest;
+use App\EventPaymentModules\DTO\RegistrationSummaryResponse;
+use App\EventPaymentModules\ProvidesGiroCode;
+use App\Models\EventParticipant;
+use App\Models\PaymentMethod;
+use App\Providers\GiroCodeProvider;
+
+/**
+ * Überweisung auf das Veranstaltungskonto -- die Zahlung erfolgt manuell durch die teilnehmende Person.
+ */
+class AccountTransferPaymentModule extends AbstractEventPaymentModule implements ProvidesGiroCode
+{
+    public static function slug(): string
+    {
+        return PaymentMethod::PAYMENT_ACCOUNT_TRANSACTION;
+    }
+
+    public function defaultName(): string
+    {
+        return 'Überweisung auf Veranstaltungskonto';
+    }
+
+    public function defaultConfiguration(): array
+    {
+        return ['icon' => 'building-columns'];
+    }
+
+    public function getOptions(): array
+    {
+        return [
+            ['name' => 'account_owner', 'label' => 'Kontoinhaber', 'type' => 'string', 'required' => true],
+            ['name' => 'iban', 'label' => 'IBAN', 'type' => 'string', 'required' => true],
+            ['name' => 'bic', 'label' => 'BIC', 'type' => 'string', 'required' => false],
+            ['name' => 'summary_confirmation_text', 'label' => 'Bestätigung durch Teilnehmende (Zusammenfassung, {amount} als Platzhalter)', 'type' => 'string', 'required' => false],
+            ['name' => 'icon', 'label' => 'Symbol', 'type' => 'icon', 'required' => false],
+        ];
+    }
+
+    public function registrationSummary(RegistrationSummaryRequest $request): RegistrationSummaryResponse
+    {
+        $participant = $request->participant;
+        $config = $request->configuration;
+
+        $amountLeft = clone $participant->amount;
+        if ($participant->amount_paid !== null) {
+            $amountLeft->subtractAmount($participant->amount_paid);
+        }
+
+        $hasPaymentInformation = $amountLeft->getAmount() > 0;
+
+        // GiroCode nur bei offenem Betrag; Bildquelle je Render-Kontext (Web-Endpoint vs. Mail-CID).
+        $giroCodeSrc = null;
+        if ($hasPaymentInformation) {
+            $giroCodeSrc = $request->context === RegistrationRenderContext::Mail
+                ? 'cid:girocode.png'
+                : '/print-girocode/' . $participant->identifier;
+        }
+
+        // Medien-gerechtes Template je Render-Kontext (Web: SPA-Klassen, Mail: E-Mail-tauglich).
+        $view = $request->context === RegistrationRenderContext::Mail
+            ? 'payment-modules.account-transfer.mail'
+            : 'payment-modules.account-transfer.web';
+
+        $response = new RegistrationSummaryResponse();
+        $response->hasPaymentInformation = $hasPaymentInformation;
+        $response->html = view($view, [
+            'accountOwner' => (string)($config['account_owner'] ?? ''),
+            'iban' => (string)($config['iban'] ?? ''),
+            'paymentPurpose' => (string)$participant->payment_purpose,
+            'amount' => $amountLeft->toString(),
+            'giroCodeSrc' => $giroCodeSrc,
+            'reminderUrl' => url('/api/v1/event/participant/' . $participant->identifier . '/ical-payment'),
+            'paymentDeadline' => $participant->event?->registration_final_end?->format('d.m.Y'),
+        ])->render();
+
+        return $response;
+    }
+
+    public function giroCode(EventParticipant $participant, array $configuration): ?string
+    {
+        $amountLeft = clone $participant->amount;
+        if ($participant->amount_paid !== null) {
+            $amountLeft->subtractAmount($participant->amount_paid);
+        }
+
+        if ($amountLeft->getAmount() <= 0) {
+            return null;
+        }
+
+        $provider = new GiroCodeProvider(
+            (string)($configuration['account_owner'] ?? ''),
+            (string)($configuration['iban'] ?? ''),
+            $amountLeft->getAmount(),
+            (string)$participant->payment_purpose,
+        );
+
+        return (string)$provider->create();
+    }
+
+    protected function invoiceClosingStatement(CreateInvoiceRequest $request): string
+    {
+        // TODO: In einer Folge-Iteration ausformulieren (z.B. "Bitte überweise bis zum ... auf IBAN ...").
+        return '';
+    }
+}

app/EventPaymentModules/Modules/UndefinedPaymentModule.php

@@ -0,0 +1,64 @@
+<?php
+
+namespace App\EventPaymentModules\Modules;
+
+use App\EventPaymentModules\AbstractEventPaymentModule;
+use App\EventPaymentModules\DTO\CreateInvoiceRequest;
+use App\EventPaymentModules\DTO\RegistrationRenderContext;
+use App\EventPaymentModules\DTO\RegistrationSummaryRequest;
+use App\EventPaymentModules\DTO\RegistrationSummaryResponse;
+use App\Models\PaymentMethod;
+
+/**
+ * Sonstiges (Barzahlung, Zahlung vor Ort) -- die anzuzeigende Zahlungsinformation ist nutzerdefiniert
+ * (mehrzeiliger Freitext) und wird als Option gepflegt.
+ */
+class UndefinedPaymentModule extends AbstractEventPaymentModule
+{
+    public static function slug(): string
+    {
+        return PaymentMethod::PAYMENT_NOT_DEFINED;
+    }
+
+    public function defaultName(): string
+    {
+        return 'Sonstiges (Barzahlung, Zahlung vor Ort)';
+    }
+
+    public function defaultConfiguration(): array
+    {
+        return ['icon' => 'coins'];
+    }
+
+    public function getOptions(): array
+    {
+        return [
+            ['name' => 'payment_information', 'label' => 'Zahlungsinformationen', 'type' => 'richtext', 'required' => true, 'hint' => 'Dieser Text wird der teilnehmenden Person am Ende der Anmeldung und in der Bestätigungs-E-Mail angezeigt.'],
+            ['name' => 'icon', 'label' => 'Symbol', 'type' => 'icon', 'required' => false],
+        ];
+    }
+
+    public function registrationSummary(RegistrationSummaryRequest $request): RegistrationSummaryResponse
+    {
+        $paymentInformation = (string)($request->configuration['payment_information'] ?? '');
+
+        $response = new RegistrationSummaryResponse();
+        $response->hasPaymentInformation = trim($paymentInformation) !== '';
+
+        if ($response->hasPaymentInformation) {
+            // Medien-gerechtes Template je Render-Kontext (Web: SPA, Mail: E-Mail-tauglich).
+            $view = $request->context === RegistrationRenderContext::Mail
+                ? 'payment-modules.undefined.mail'
+                : 'payment-modules.undefined.web';
+
+            $response->html = view($view, ['paymentInformation' => $paymentInformation])->render();
+        }
+
+        return $response;
+    }
+
+    protected function invoiceClosingStatement(CreateInvoiceRequest $request): string
+    {
+        return '';
+    }
+}

app/EventPaymentModules/ProvidesGiroCode.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\EventPaymentModules;
+
+use App\Models\EventParticipant;
+
+/**
+ * Fähigkeits-Interface (Interface Segregation): Nur Zahlungsarten mit einem GiroCode (SEPA-QR)
+ * implementieren dies -- aktuell ausschließlich die Überweisung. Das Core-Interface
+ * {@see EventPaymentModule} bleibt davon unberührt.
+ */
+interface ProvidesGiroCode
+{
+    /**
+     * Erzeugt den GiroCode (SEPA-QR) als PNG-Binary -- oder null, wenn (z.B. mangels offenem Betrag)
+     * kein GiroCode angeboten wird.
+     *
+     * @param array<string, mixed> $configuration
+     */
+    public function giroCode(EventParticipant $participant, array $configuration): ?string;
+}

app/Http/Controllers/GiroCodeGetController.php

@@ -2,8 +2,8 @@
 
 namespace App\Http\Controllers;
 
+use App\EventPaymentModules\ProvidesGiroCode;
 use App\Models\EventParticipant;
-use App\Providers\GiroCodeProvider;
 use Illuminate\Http\Request;
 
 class GiroCodeGetController {
@@ -14,18 +14,16 @@ class GiroCodeGetController {
             return response()->json(['message' => 'Participant not found'], 404);
         }
 
-        $amount = $participant->amount;
+        // Die GiroCode-Erzeugung gehört zum Zahlungsmodul; ohne diese Fähigkeit (z.B. Barzahlung) -> 404.
-        $amount->subtractAmount($participant->amount_paid);
+        $module = $participant->paymentModule();
+        $girocode = $module instanceof ProvidesGiroCode
+            ? $module->giroCode($participant, $participant->paymentConfiguration())
+            : null;
 
-        $girocodeProvider = new GiroCodeProvider(
+        if ($girocode === null) {
-            $participant->event()->first()->account_owner,
+            return response()->json(['message' => 'No giro code for this payment method'], 404);
-            $participant->event()->first()->account_iban,
+        }
-            $participant->amount->getAmount(),
-            $participant->payment_purpose
-        );
 
-        return response($girocodeProvider->create(),    200,
+        return response($girocode, 200, ['Content-Type' => 'image/png']);
-            ['Content-Type' => 'image/png']
-        );
     }
 }

app/Installer/ProductionDataSeeder.php

@@ -11,9 +11,12 @@ use App\Enumerations\InvoiceStatus;
 use App\Enumerations\InvoiceType;
 use App\Enumerations\ParticipationFeeType;
 use App\Enumerations\ParticipationType;
+use App\Enumerations\PaymentStatus;
 use App\Enumerations\SwimmingPermission;
 use App\Enumerations\UserRole;
+use App\EventPaymentModules\EventPaymentModuleRegistry;
 use App\Models\CronTask;
+use App\Models\PaymentMethod;
 use App\Models\Tenant;
 
 class ProductionDataSeeder {
@@ -28,6 +31,21 @@ class ProductionDataSeeder {
         $this->installParticipationFeeTypes();
         $this->installParticipationTypes();
         $this->installEfzStatus();
+        $this->installPaymentMethods();
+        $this->installPaymentStatus();
+    }
+
+    private function installPaymentStatus() {
+        PaymentStatus::create(['slug' => PaymentStatus::PAYMENT_STATUS_PENDING]);
+        PaymentStatus::create(['slug' => PaymentStatus::PAYMENT_STATUS_SCHEDULED]);
+        PaymentStatus::create(['slug' => PaymentStatus::PAYMENT_STATUS_PAID]);
+        PaymentStatus::create(['slug' => PaymentStatus::PAYMENT_STATUS_FAILED]);
+    }
+
+    private function installPaymentMethods() {
+        foreach (EventPaymentModuleRegistry::slugs() as $slug) {
+            PaymentMethod::create(['slug' => $slug]);
+        }
     }
 
     private function installEfzStatus() {

app/Mail/AdminMails/CostUnitInvalidBillingDeadlineMail.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace App\Mail\AdminMails;
+
+use Illuminate\Mail\Mailable;
+use Illuminate\Mail\Mailables\Attachment;
+use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Envelope;
+
+class CostUnitInvalidBillingDeadlineMail extends Mailable
+{
+    public function __construct(
+        private int|string $costUnitId,
+        private ?string    $costUnitName,
+        private ?string    $invalidBillingDeadline,
+    )
+    {
+        //
+    }
+
+    /**
+     * Get the message envelope.
+     */
+    public function envelope(): Envelope
+    {
+        return new Envelope(
+            subject: sprintf('Ungültiges Abrechnungsende für Kostenstelle #%s', $this->costUnitId),
+        );
+    }
+
+    /**
+     * Get the message content definition.
+     */
+    public function content(): Content
+    {
+        return new Content(
+            view: 'emails.admin.cost_unit_invalid_billing_deadline',
+            with: [
+                'costUnitId' => $this->costUnitId,
+                'costUnitName' => $this->costUnitName,
+                'invalidBillingDeadline' => $this->invalidBillingDeadline,
+            ],
+        );
+    }
+
+    /**
+     * Get the attachments for the message.
+     *
+     * @return array<int, Attachment>
+     */
+    public function attachments(): array
+    {
+        return [];
+    }
+}

app/Mail/EventReportMails/PaymentMethodsExhaustedMail.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace App\Mail\EventReportMails;
+
+use App\Models\Event;
+use Illuminate\Mail\Mailable;
+use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Envelope;
+
+class PaymentMethodsExhaustedMail extends Mailable
+{
+    public function __construct(
+        private Event $event,
+    )
+    {
+        //
+    }
+
+    /**
+     * Get the message envelope.
+     */
+    public function envelope(): Envelope
+    {
+        $subject = sprintf(
+            'Anmeldung deaktiviert – keine Zahlungsmethode verfügbar für %1$s',
+            $this->event->name
+        );
+
+        return new Envelope(
+            subject: $subject,
+        );
+    }
+
+    /**
+     * Get the message content definition.
+     */
+    public function content(): Content
+    {
+        return new Content(
+            view: 'emails.events.payment_methods_exhausted',
+            with: [
+                'eventTitle' => $this->event->name,
+            ],
+        );
+    }
+}

app/Mail/ParticipantParticipationMails/EventSignUpSuccessfullMail.php

@@ -8,6 +8,8 @@ use App\Domains\Event\Actions\GenerateIcal\GenerateIcalResponse;
 use App\Domains\Event\Actions\GenerateIcalForDeadline\GenerateIcalForDeadlineCommand;
 use App\Domains\Event\Actions\GenerateIcalForDeadline\GenerateIcalForDeadlineRequest;
 use App\Domains\Event\Actions\GenerateIcalForDeadline\GenerateIcalForDeadlineResponse;
+use App\EventPaymentModules\DTO\RegistrationRenderContext;
+use App\EventPaymentModules\ProvidesGiroCode;
 use App\Models\EventParticipant;
 use Illuminate\Bus\Queueable;
 use Illuminate\Http\Request;
@@ -62,13 +64,13 @@ class EventSignUpSuccessfullMail extends Mailable
         $event = $this->participant->event()->first()->toResource()->toArray(new Request());
         $participant = $this->participant->toResource()->toArray(new Request());
 
-        $girocodeProvider = new \App\Providers\GiroCodeProvider(
+        $module = $this->participant->paymentModule();
-            $event['accountOwner'],
+        $girocodeBinary = $module instanceof ProvidesGiroCode
-            $event['accountIban'],
+            ? $module->giroCode($this->participant, $this->participant->paymentConfiguration())
-            (float) $participant['amount_left_value'],
+            : null;
-            $participant['payment_purpose']
+
-        );
+        // Zahlungs-Block im Mail-Kontext erzeugen (GiroCode als cid: statt Web-Endpoint).
-        $girocodeBinary = (string)$girocodeProvider->create();
+        $paymentSummary = $this->participant->paymentSummary(RegistrationRenderContext::Mail);
 
         $participationIcal = $this->getParticipationIcal();
         $deadlineIcal = $this->getDeadlineIcal();
@@ -85,10 +87,7 @@ class EventSignUpSuccessfullMail extends Mailable
                 'departure' => $participant['departure'],
                 'amount' => $participant['amount_left_string'],
                 'paymentFinalDate' => $event['registrationFinalEnd']['formatted'],
-                'paymentRequired' => $participant['needs_payment'],
+                'paymentSummary' => ['hasPaymentInformation' => $paymentSummary->hasPaymentInformation, 'html' => $paymentSummary->html],
-                'accountOwner' => $event['accountOwner'],
-                'accountIban' => $event['accountIban'],
-                'paymentPurpose' => $participant['payment_purpose'],
                 'girocodeBinary' => $girocodeBinary,
                 'efzStatus' => $participant['efz_status'],
                 'participationIcalFilename' => $participationIcal->filename,

app/Mail/ParticipantPaymentMails/ParticipantPaymentMissingPaymentMail.php

@@ -2,6 +2,8 @@
 
 namespace App\Mail\ParticipantPaymentMails;
 
+use App\EventPaymentModules\DTO\RegistrationRenderContext;
+use App\EventPaymentModules\ProvidesGiroCode;
 use App\Models\EventParticipant;
 use Illuminate\Http\Request;
 use Illuminate\Mail\Mailable;
@@ -45,13 +47,13 @@ class ParticipantPaymentMissingPaymentMail extends Mailable
         $event = $this->participant->event()->first()->toResource()->toArray(new Request());
         $participant = $this->participant->toResource()->toArray(new Request());
 
-        $girocodeProvider = new \App\Providers\GiroCodeProvider(
+        $module = $this->participant->paymentModule();
-            $event['accountOwner'],
+        $girocodeBinary = $module instanceof ProvidesGiroCode
-            $event['accountIban'],
+            ? $module->giroCode($this->participant, $this->participant->paymentConfiguration())
-            (float) $participant['amount_left_value'],
+            : null;
-            $participant['payment_purpose']
+
-        );
+        // Zahlungs-Block im Mail-Kontext erzeugen (GiroCode als cid: statt Web-Endpoint).
-        $girocodeBinary = (string)$girocodeProvider->create();
+        $paymentSummary = $this->participant->paymentSummary(RegistrationRenderContext::Mail);
 
         return new Content(
             view: 'emails.participantPayments.missing_amount',
@@ -64,10 +66,7 @@ class ParticipantPaymentMissingPaymentMail extends Mailable
                 'departure' => $participant['departure'],
                 'amount' => $participant['amount_left_string'],
                 'paymentFinalDate' => $event['registrationFinalEnd']['formatted'],
-                'paymentRequired' => $participant['needs_payment'],
+                'paymentSummary' => ['hasPaymentInformation' => $paymentSummary->hasPaymentInformation, 'html' => $paymentSummary->html],
-                'accountOwner' => $event['accountOwner'],
-                'accountIban' => $event['accountIban'],
-                'paymentPurpose' => $participant['payment_purpose'],
                 'girocodeBinary' => $girocodeBinary,
             ],
         );

app/Models/AvailablePaymentMethod.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace App\Models;
+
+use App\Scopes\InstancedModel;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+
+/**
+ * @property int $id
+ * @property string $tenant
+ * @property string $slug
+ * @property string $name
+ * @property ?string $description
+ * @property bool $active
+ * @property ?array $configuration
+ */
+class AvailablePaymentMethod extends InstancedModel
+{
+    protected $table = 'available_payment_methods';
+
+    protected $fillable = [
+        'tenant',
+        'slug',
+        'name',
+        'description',
+        'active',
+        'configuration',
+    ];
+
+    protected $casts = [
+        'active' => 'boolean',
+        'configuration' => 'array',
+    ];
+
+    public function paymentMethod(): BelongsTo
+    {
+        return $this->belongsTo(PaymentMethod::class, 'slug', 'slug');
+    }
+
+    /**
+     * Sind alle Pflicht-Optionen dieses Moduls (siehe Options-Schema des Zahlungsmoduls) befüllt?
+     */
+    public function isComplete(): bool
+    {
+        return PaymentMethod::isConfigurationComplete($this->slug, $this->configuration ?? []);
+    }
+
+    public function events(): BelongsToMany
+    {
+        // Pivot verknüpft über den Slug -- Event::paymentMethods() greift daher automatisch nur
+        // auf Events des aktuell gebundenen Tenants zu (SiteScope auf Event + AvailablePaymentMethod).
+        return $this->belongsToMany(Event::class, 'event_payment_methods', 'slug', 'event_id', 'slug', 'id')->withTimestamps();
+    }
+}

app/Models/Event.php

@@ -7,6 +7,7 @@ use App\Casts\AmountCast;
 use App\Enumerations\EatingHabit;
 use App\Enumerations\ParticipationFeeType;
 use App\RelationModels\EventParticipationFee;
+use App\RelationModels\EventPaymentMethods;
 use App\Resources\EventResource;
 use App\Scopes\CommonModel;
 use App\Scopes\InstancedModel;
@@ -153,6 +154,16 @@ class Event extends InstancedModel
         return $this->belongsToMany(EatingHabit::class, 'event_allowed_eating_habits', 'event_id', 'eating_habit_id');
     }
 
+    public function paymentMethods() : BelongsToMany {
+        // Pivot verknüpft über den Slug (payment_methods.slug), nicht über die numerische id
+        // von available_payment_methods -- die tenant-spezifische Instanz wird dadurch implizit
+        // über den globalen SiteScope von AvailablePaymentMethod (gefiltert auf app('tenant')) aufgelöst.
+        return $this->belongsToMany(AvailablePaymentMethod::class, 'event_payment_methods', 'event_id', 'slug', 'id', 'slug')
+            ->using(EventPaymentMethods::class)
+            ->withPivot('configuration')
+            ->withTimestamps();
+    }
+
     public function resetContributingLocalGroups() {
         $this->localGroups()->detach();
         $this->save();
@@ -163,6 +174,11 @@ class Event extends InstancedModel
         $this->save();
     }
 
+    public function resetPaymentMethods() {
+        $this->paymentMethods()->detach();
+        $this->save();
+    }
+
     public function resetMangers() {
         $this->eventManagers()->detach();
         $this->save();

app/Models/EventParticipant.php

@@ -8,8 +8,12 @@ use App\Enumerations\EfzStatus;
 use App\Enumerations\FirstAidPermission;
 use App\Enumerations\ParticipationType;
 use App\Enumerations\SwimmingPermission;
+use App\EventPaymentModules\DTO\RegistrationRenderContext;
+use App\EventPaymentModules\DTO\RegistrationSummaryRequest;
+use App\EventPaymentModules\DTO\RegistrationSummaryResponse;
+use App\EventPaymentModules\EventPaymentModule;
+use App\EventPaymentModules\EventPaymentModuleRegistry;
 use App\Scopes\InstancedModel;
-use Illuminate\Database\Eloquent\Builder;
 
 
 class EventParticipant extends InstancedModel
@@ -64,6 +68,8 @@ class EventParticipant extends InstancedModel
         'amount',
         'amount_paid',
         'payment_purpose',
+        'payment_method',
+        'payment_options',
         'efz_status',
         'unregistered_at',
     ];
@@ -83,6 +89,7 @@ class EventParticipant extends InstancedModel
 
         'amount' => AmountCast::class,
         'amount_paid' => AmountCast::class,
+        'payment_options' => 'array',
     ];
 
     /*
@@ -126,6 +133,11 @@ class EventParticipant extends InstancedModel
         return $this->belongsTo(EatingHabit::class, 'eating_habits', 'slug');
     }
 
+    public function paymentMethod()
+    {
+        return $this->belongsTo(\App\Models\PaymentMethod::class, 'payment_method', 'slug');
+    }
+
     public function firstAidPermission()
     {
         return $this->belongsTo(FirstAidPermission::class, 'first_aid_permission', 'slug');
@@ -160,4 +172,47 @@ class EventParticipant extends InstancedModel
         return $this->nickname ?? $this->firstname;
     }
 
+    /*
+    |--------------------------------------------------------------------------
+    | Zahlungsmodul
+    |--------------------------------------------------------------------------
+    */
+
+    /** Das Zahlungsmodul der gewählten Zahlungsart des Teilnehmers. */
+    public function paymentModule(): ?EventPaymentModule
+    {
+        return $this->payment_method !== null
+            ? EventPaymentModuleRegistry::forSlug($this->payment_method)
+            : null;
+    }
+
+    /**
+     * Aufgelöste pro-Event-Konfiguration der gewählten Zahlungsart (event_payment_methods.configuration).
+     *
+     * Nutzt die Relation-Property, damit sie via `->with('event.paymentMethods')` eager geladen und in
+     * Teilnehmerlisten (gleiches Event teilt dieselbe Event-Instanz) ohne N+1 aufgelöst werden kann.
+     *
+     * @return array<string, mixed>
+     */
+    public function paymentConfiguration(): array
+    {
+        if ($this->payment_method === null) {
+            return [];
+        }
+
+        $method = $this->event?->paymentMethods->firstWhere('slug', $this->payment_method);
+
+        return $method?->pivot->configuration ?? [];
+    }
+
+    /** Zahlungs-Zusammenfassung (Anmeldeabschluss/Mail), vom Zahlungsmodul als fertiges HTML erzeugt. */
+    public function paymentSummary(RegistrationRenderContext $context = RegistrationRenderContext::Web): RegistrationSummaryResponse
+    {
+        $module = $this->paymentModule();
+        if ($module === null) {
+            return new RegistrationSummaryResponse();
+        }
+
+        return $module->registrationSummary(new RegistrationSummaryRequest($this, $this->paymentConfiguration(), $context));
+    }
 }

app/Models/PaymentMethod.php

@@ -0,0 +1,101 @@
+<?php
+
+namespace App\Models;
+
+use App\EventPaymentModules\EventPaymentModuleRegistry;
+use App\Scopes\CommonModel;
+use Illuminate\Database\Eloquent\Concerns\HasUuids;
+
+/**
+ * @property string $id
+ * @property string $slug
+ *
+ * Hinweis: Das Verhalten je Zahlungsart (Options-Schema, Defaults, Zahlung, Rechnung) liegt in den
+ * Zahlungsmodulen unter {@see \App\EventPaymentModules}. Dieses Model bleibt eine dünne Fassade, damit
+ * bestehende Aufrufstellen (PaymentMethod::optionsFor/... ) unverändert weiterlaufen.
+ */
+class PaymentMethod extends CommonModel
+{
+    use HasUuids;
+
+    public $incrementing = false;
+    protected $keyType = 'string';
+
+    public const string PAYMENT_ACCOUNT_TRANSACTION = 'PAYMENT_ACCOUNT_TRANSACTION';
+    public const string PAYMENT_NOT_DEFINED = 'PAYMENT_NOT_DEFINED';
+
+    protected $fillable = [
+        'slug',
+    ];
+
+    /**
+     * Standard-Werte (name/description/configuration) je Slug -- aus den Zahlungsmodulen aufgebaut.
+     *
+     * @return array<string, array{name: string, description: ?string, configuration: array<string, mixed>}>
+     */
+    public static function defaults(): array
+    {
+        $defaults = [];
+        foreach (EventPaymentModuleRegistry::all() as $slug => $module) {
+            $defaults[$slug] = [
+                'name' => $module->defaultName(),
+                'description' => $module->defaultDescription(),
+                'configuration' => $module->defaultConfiguration(),
+            ];
+        }
+
+        return $defaults;
+    }
+
+    /**
+     * Admin-Options-Schema für einen Slug.
+     *
+     * @return array<int, array{name: string, label: string, type: string, required: bool}>
+     */
+    public static function optionsFor(string $slug): array
+    {
+        return EventPaymentModuleRegistry::forSlug($slug)?->getOptions() ?? [];
+    }
+
+    /**
+     * Teilnehmer-Eingabe-Schema für einen Slug (payer-seitig).
+     *
+     * @return array<int, array{name: string, label: string, type: string, required: bool}>
+     */
+    public static function participantOptionsFor(string $slug): array
+    {
+        return EventPaymentModuleRegistry::forSlug($slug)?->getParticipantOptions() ?? [];
+    }
+
+    /**
+     * Namen aller Pflicht-Optionen eines Slugs.
+     *
+     * @return array<int, string>
+     */
+    public static function requiredOptionKeys(string $slug): array
+    {
+        return EventPaymentModuleRegistry::forSlug($slug)?->requiredOptionKeys() ?? [];
+    }
+
+    /**
+     * Reduziert eine Konfiguration auf die im Schema definierten Options-Keys des Slugs.
+     *
+     * @param array<string, mixed> $config
+     * @return array<string, mixed>
+     */
+    public static function sanitizeConfiguration(string $slug, array $config): array
+    {
+        return EventPaymentModuleRegistry::forSlug($slug)?->sanitizeConfiguration($config) ?? [];
+    }
+
+    /**
+     * Prüft, ob alle Pflicht-Optionen eines Slugs in der Konfiguration befüllt (non-empty) sind.
+     * Unbekannte Slugs (kein Modul) gelten als vollständig -- kein Modul, keine Pflichtfelder.
+     *
+     * @param array<string, mixed> $config
+     */
+    public static function isConfigurationComplete(string $slug, array $config): bool
+    {
+        return EventPaymentModuleRegistry::forSlug($slug)?->isConfigurationComplete($config) ?? true;
+    }
+}

app/Models/Tenant.php

@@ -21,6 +21,10 @@ use App\Scopes\CommonModel;
  * @property string $url_participation_rules
  * @property boolean $events_allowed
  * @property boolean $has_active_instance
+ * @property boolean $tax_liable
+ * @property int $vat_rate
+ * @property string|null $tax_exemption_reason
+ * @property string|null $tax_exemption_note
  */
 class Tenant extends CommonModel
 {
@@ -46,6 +50,15 @@ class Tenant extends CommonModel
         'impress_text',
         'url_participation_rules',
         'is_active_local_group',
-        'has_active_instance'
+        'has_active_instance',
+        'tax_liable',
+        'vat_rate',
+        'tax_exemption_reason',
+        'tax_exemption_note',
+    ];
+
+    protected $casts = [
+        'tax_liable' => 'boolean',
+        'vat_rate' => 'integer',
     ];
 }

app/Providers/GlobalDataProvider.php

@@ -5,10 +5,12 @@ namespace App\Providers;
 use App\Enumerations\EatingHabit;
 use App\Enumerations\InvoiceType;
 use App\Enumerations\UserRole;
+use App\Models\AvailablePaymentMethod;
 use App\Models\Tenant;
 use App\Models\User;
 use App\Repositories\EventRepository;
 use App\Repositories\PageTextRepository;
+use App\Resources\AvailablePaymentMethodResource;
 use App\Resources\UserResource;
 use Illuminate\Database\Eloquent\Collection;
 use Illuminate\Http\JsonResponse;
@@ -182,11 +184,13 @@ class GlobalDataProvider {
         return $activeUsers;
     }
 
-    public function getEventSettingData() : JsonResponse {
+    public function getEventSettingData(Request $request) : JsonResponse {
         return response()->json(
             [
                 'localGroups' => Tenant::where(['is_active_local_group' => true])->get(),
                 'eatingHabits' => EatingHabit::all(),
+                'paymentMethods' => AvailablePaymentMethod::where('active', true)->get()
+                    ->map(fn (AvailablePaymentMethod $method) => new AvailablePaymentMethodResource($method)->toArray($request)),
             ]);
     }
 

app/RelationModels/EventPaymentMethods.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\RelationModels;
+
+use Illuminate\Database\Eloquent\Relations\Pivot;
+
+/**
+ * @property int $event_id
+ * @property string $slug
+ * @property ?array $configuration
+ */
+class EventPaymentMethods extends Pivot
+{
+    protected $table = 'event_payment_methods';
+
+    public $incrementing = true;
+
+    protected $fillable = ['event_id', 'slug', 'configuration'];
+
+    protected $casts = [
+        'configuration' => 'array',
+    ];
+}

app/Resources/AvailablePaymentMethodResource.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Resources;
+
+use App\Models\AvailablePaymentMethod;
+use App\Models\PaymentMethod;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+class AvailablePaymentMethodResource extends JsonResource {
+    private AvailablePaymentMethod $availablePaymentMethod;
+
+    public function __construct(AvailablePaymentMethod $availablePaymentMethod) {
+        parent::__construct($availablePaymentMethod);
+        $this->availablePaymentMethod = $availablePaymentMethod;
+    }
+
+    public function toArray($request) : array {
+        // Wird die Instanz über Event::paymentMethods() geladen, liegt die pro-Event-Konfiguration
+        // im Pivot; ansonsten (Tenant-Kontext) gilt die Konfiguration der Instanz selbst.
+        $pivot = $this->availablePaymentMethod->pivot ?? null;
+        $configuration = $pivot !== null
+            ? ($pivot->configuration ?? [])
+            : ($this->availablePaymentMethod->configuration ?? []);
+
+        return [
+            'id' => $this->availablePaymentMethod->id,
+            'slug' => $this->availablePaymentMethod->slug,
+            'name' => $this->availablePaymentMethod->name,
+            'description' => $this->availablePaymentMethod->description,
+            'active' => $this->availablePaymentMethod->active,
+            'configuration' => (object) $configuration,
+            'optionsSchema' => PaymentMethod::optionsFor($this->availablePaymentMethod->slug),
+            'participantOptionsSchema' => PaymentMethod::participantOptionsFor($this->availablePaymentMethod->slug),
+        ];
+    }
+}

app/Resources/EventParticipantResource.php

@@ -5,7 +5,9 @@ namespace App\Resources;
 use App\Enumerations\EatingHabit;
 use App\Enumerations\EfzStatus;
 use App\Enumerations\ParticipationType;
+use App\Models\AvailablePaymentMethod;
 use App\Models\EventParticipant;
+use App\Models\PaymentMethod;
 use App\ValueObjects\Age;
 use Illuminate\Http\Resources\Json\JsonResource;
 
@@ -25,6 +27,8 @@ class EventParticipantResource extends JsonResource
             $amountLeft->subtractAmount($this->resource->amount_paid);
         }
 
+        $paymentSummary = $this->resource->paymentSummary();
+
         $presenceDays = $this->resource->arrival_date->diff($this->resource->departure_date)->days;
         if ($presenceDays === 0) {
             $presenceDays = 1;
@@ -52,7 +56,13 @@ class EventParticipantResource extends JsonResource
                 'tetanusVaccinationEdit' => $this->resource->tetanus_vaccination?->format('Y-m-d') ?? null,
                 'presenceDays' => ['real' => $presenceDays, 'support' => $presenceDaysSupport],
                 'participationType' => ParticipationType::where(['slug' => $this->resource->participation_type])->first()->name,
-                'needs_payment' => $this->resource->amount->getAmount() > 0 && $event->pay_direct && $this->resource->amount_paid?->getAmount() < $this->resource->amount->getAmount(),
+                'needs_payment' => $this->resource->amount->getAmount() > 0
+                    && $this->resource->payment_method === PaymentMethod::PAYMENT_ACCOUNT_TRANSACTION
+                    && $this->resource->amount_paid?->getAmount() < $this->resource->amount->getAmount(),
+                'paymentSummary' => [
+                    'hasPaymentInformation' => $paymentSummary->hasPaymentInformation,
+                    'html' => $paymentSummary->html,
+                ],
                 'nicename' => $this->resource->getNicename(),
                 'arrival' => $this->resource->arrival_date->format('d.m.Y'),
                 'departure' => $this->resource->departure_date->format('d.m.Y'),
@@ -68,6 +78,9 @@ class EventParticipantResource extends JsonResource
                 'localGroupState' => null !== $this->resource->localGroup()->first()?->postcode ? config('postCode.map.' . $this->resource->postcode) : '--',
                 'birthday' => $this->resource->birthday->format('d.m.Y'),
                 'eatingHabit' => EatingHabit::where('slug', $this->resource->eating_habit)->first()->name,
+                'paymentMethod' => $this->resource->payment_method !== null
+                    ? AvailablePaymentMethod::withoutGlobalScopes()->where('tenant', $this->resource->tenant)->where('slug', $this->resource->payment_method)->first()?->name ?? $this->resource->payment_method
+                    : null,
                 'cocColor' => match ($this->resource->efz_status) {
                     EfzStatus::EFZ_STATUS_CHECKED_VALID => 'bg-green',
                     EfzStatus::EFZ_STATUS_NOT_REQUIRED => 'bg-green',

app/Resources/EventResource.php

@@ -134,6 +134,9 @@ class EventResource extends JsonResource{
         $returnArray['eatingHabits'] = $this->event->eatingHabits()->get()->map(
             fn($eatingHabit) => new EatingHabitResource($eatingHabit))->toArray();
 
+        $returnArray['paymentMethods'] = $this->event->paymentMethods()->get()->map(
+            fn($paymentMethod) => new AvailablePaymentMethodResource($paymentMethod)->toArray($request))->toArray();
+
 
         $returnArray['participationTypes'] = [];
 

app/Tasks/CloseCostUnit.php

@@ -6,9 +6,11 @@ use App\Domains\CostUnit\Actions\ChangeCostUnitDetails\ChangeCostUnitDetailsComm
 use App\Domains\CostUnit\Actions\ChangeCostUnitDetails\ChangeCostUnitDetailsRequest;
 use App\Domains\CostUnit\Actions\ChangeCostUnitState\ChangeCostUnitStateCommand;
 use App\Domains\CostUnit\Actions\ChangeCostUnitState\ChangeCostUnitStateRequest;
+use App\Mail\AdminMails\CostUnitInvalidBillingDeadlineMail;
 use App\Models\CostUnit;
 use App\Repositories\CostUnitRepository;
 use App\ValueObjects\Amount;
+use Illuminate\Support\Facades\Mail;
 
 class CloseCostUnit implements CronTask {
     public function handle(): void
@@ -33,6 +35,27 @@ class CloseCostUnit implements CronTask {
             }
 
             $billingEndTime = \DateTime::createFromFormat('Y-m-d H:i:s', $billingEnd);
+            if (false === $billingEndTime) {
+                $billingEndTime = \DateTime::createFromFormat('Y-m-d', $billingEnd);
+            }
+
+            if (false === $billingEndTime) {
+                $recipients = config('app.admin_mail');
+                if (null === $recipients) {
+                    $recipients = CostUnit::where('id', $costUnit['id'])->first()
+                        ?->treasurers()->pluck('email')->all() ?? [];
+                }
+
+                if (!empty($recipients)) {
+                    Mail::to($recipients)->send(new CostUnitInvalidBillingDeadlineMail(
+                        costUnitId: $costUnit['id'],
+                        costUnitName: $costUnit['name'] ?? null,
+                        invalidBillingDeadline: $billingEnd,
+                    ));
+                }
+
+                continue;
+            }
             $billingEndTime->setTime(0,0,0);
             $billingEndTime->add(new \DateInterval('P1D'));
 

app/Views/Components/RichSelectBox.vue

@@ -0,0 +1,162 @@
+<script setup>
+import {computed, onBeforeUnmount, onMounted, ref} from 'vue'
+import Icon from './Icon.vue'
+
+// Generisches Custom-Dropdown, das je Option ein Icon + Label anzeigt (ein natives <select> kann
+// keine SVG-Icons rendern). Wiederverwendbar für Icon-/Rich-Selects.
+const props = defineProps({
+    // Ausgewählter Wert (value einer Option).
+    modelValue: {type: String, default: ''},
+    // [{ value, label, icon? }]
+    options: {type: Array, default: () => []},
+    placeholder: {type: String, default: 'Auswählen…'},
+})
+const emit = defineEmits(['update:modelValue'])
+
+const open = ref(false)
+const root = ref(null)
+
+const selected = computed(() => props.options.find(o => o.value === props.modelValue) ?? null)
+
+function toggle() {
+    open.value = !open.value
+}
+
+function select(option) {
+    emit('update:modelValue', option.value)
+    open.value = false
+}
+
+function onClickOutside(event) {
+    if (root.value && !root.value.contains(event.target)) {
+        open.value = false
+    }
+}
+
+function onKeydown(event) {
+    if (event.key === 'Escape' || event.key === 'Esc') {
+        open.value = false
+    }
+}
+
+onMounted(() => {
+    document.addEventListener('click', onClickOutside)
+    document.addEventListener('keydown', onKeydown)
+})
+onBeforeUnmount(() => {
+    document.removeEventListener('click', onClickOutside)
+    document.removeEventListener('keydown', onKeydown)
+})
+</script>
+
+<template>
+    <div ref="root" class="rich-select">
+        <button
+            type="button"
+            class="rich-select__trigger"
+            :aria-expanded="open"
+            @click="toggle"
+        >
+            <span class="rich-select__value">
+                <template v-if="selected">
+                    <Icon v-if="selected.icon" :key="selected.value" :name="selected.icon"/>
+                    <span>{{ selected.label }}</span>
+                </template>
+                <span v-else class="rich-select__placeholder">{{ placeholder }}</span>
+            </span>
+            <span class="rich-select__caret" aria-hidden="true">▾</span>
+        </button>
+
+        <ul v-if="open" class="rich-select__list" role="listbox">
+            <li
+                v-for="option in options"
+                :key="option.value"
+                class="rich-select__option"
+                :class="{ 'rich-select__option--active': option.value === modelValue }"
+                role="option"
+                :aria-selected="option.value === modelValue"
+                @click="select(option)"
+            >
+                <Icon v-if="option.icon" :name="option.icon"/>
+                <span>{{ option.label }}</span>
+            </li>
+        </ul>
+    </div>
+</template>
+
+<style scoped>
+.rich-select {
+    position: relative;
+    width: 100%;
+}
+
+.rich-select__trigger {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    width: 100%;
+    gap: 10px;
+    padding: 6px 10px;
+    border: 1px solid #d1d5db;
+    border-radius: 6px;
+    background: #fff;
+    cursor: pointer;
+    font-size: 0.95rem;
+    box-sizing: border-box;
+}
+
+.rich-select__trigger:hover {
+    border-color: #2563eb;
+}
+
+.rich-select__value {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    min-width: 0;
+}
+
+.rich-select__placeholder {
+    color: #9ca3af;
+}
+
+.rich-select__caret {
+    color: #6b7280;
+    font-size: 0.8rem;
+}
+
+.rich-select__list {
+    position: absolute;
+    z-index: 50;
+    top: calc(100% + 4px);
+    left: 0;
+    right: 0;
+    margin: 0;
+    padding: 4px;
+    list-style: none;
+    background: #fff;
+    border: 1px solid #d1d5db;
+    border-radius: 8px;
+    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
+    max-height: 260px;
+    overflow: auto;
+}
+
+.rich-select__option {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    padding: 8px 10px;
+    border-radius: 6px;
+    cursor: pointer;
+}
+
+.rich-select__option:hover {
+    background: #eff6ff;
+}
+
+.rich-select__option--active {
+    background: #dbeafe;
+    font-weight: 600;
+}
+</style>

config/app.php

@@ -15,6 +15,8 @@ return [
 
     'name' => env('APP_NAME', 'Laravel'),
 
+    'admin_mail' => env('APP_ADMIN_MAIL'),
+
     /*
     |--------------------------------------------------------------------------
     | Application Environment

database/dev-hacks/fix_event_payment_methods_slug.sql

@@ -0,0 +1,39 @@
+-- ---------------------------------------------------------------------------
+-- Dev-Hack: event_payment_methods von available_payment_method_id auf slug.
+--
+-- Nur für das lokale Dev-System, das noch die alte Drift-Struktur trägt.
+-- Bringt die Tabelle in den committeten Stand (2026_07_28_140020_create_event_payment_methods
+-- + 2026_07_29_140030_fix_event_payment_methods_slug), ohne migrate:fresh / Datenverlust.
+--
+-- Ausführen z.B.:
+--   docker exec -i mareike-mareike-app-1 sh -c 'mysql -h"$DB_HOST" -u"$DB_USERNAME" -p"$DB_PASSWORD" "$DB_DATABASE"' < database/dev-hacks/fix_event_payment_methods_slug.sql
+-- ---------------------------------------------------------------------------
+
+-- 1. slug nullable anlegen.
+ALTER TABLE `event_payment_methods`
+    ADD COLUMN `slug` VARCHAR(255) NULL AFTER `event_id`;
+
+-- 2. slug aus der verknüpften available_payment_methods-Zeile befüllen.
+UPDATE `event_payment_methods` epm
+    JOIN `available_payment_methods` apm ON apm.`id` = epm.`available_payment_method_id`
+    SET epm.`slug` = apm.`slug`;
+
+-- 3. Alte Spalte samt FK entfernen.
+ALTER TABLE `event_payment_methods`
+    DROP FOREIGN KEY `event_payment_methods_available_payment_method_id_foreign`;
+ALTER TABLE `event_payment_methods`
+    DROP COLUMN `available_payment_method_id`;
+
+-- 4. slug final absichern: NOT NULL, Unique (event_id, slug), FK auf payment_methods.slug.
+ALTER TABLE `event_payment_methods`
+    MODIFY `slug` VARCHAR(255) NOT NULL;
+ALTER TABLE `event_payment_methods`
+    ADD UNIQUE `event_payment_methods_event_id_slug_unique` (`event_id`, `slug`);
+ALTER TABLE `event_payment_methods`
+    ADD CONSTRAINT `event_payment_methods_slug_foreign`
+        FOREIGN KEY (`slug`) REFERENCES `payment_methods` (`slug`)
+        ON UPDATE CASCADE ON DELETE RESTRICT;
+
+-- Hinweis: Die Reparatur-Migration 2026_07_29_140030 bleibt danach "pending", ist aber ein
+-- sicherer No-Op (ihr Guard prüft available_payment_method_id) -- ein späteres
+-- `php artisan migrate` verbucht sie, ohne etwas zu verändern.

database/migrations/2026_07_28_140010_create_payment_methods.php

@@ -0,0 +1,38 @@
+<?php
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('payment_methods', function (Blueprint $table) {
+            $table->uuid('id')->primary();
+            $table->string('slug')->unique();
+            $table->timestamps();
+        });
+
+        Schema::create('available_payment_methods', function (Blueprint $table) {
+            $table->id();
+            $table->string('tenant');
+            $table->string('slug');
+            $table->string('name');
+            $table->string('description')->nullable();
+            $table->boolean('active')->default(true);
+            $table->timestamps();
+
+            $table->foreign('tenant')->references('slug')->on('tenants')->restrictOnDelete()->cascadeOnUpdate();
+            $table->foreign('slug')->references('slug')->on('payment_methods')->restrictOnDelete()->cascadeOnUpdate();
+            $table->unique(['tenant', 'slug']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('available_payment_methods');
+        Schema::dropIfExists('payment_methods');
+    }
+};

database/migrations/2026_07_28_140020_create_event_payment_methods.php

@@ -0,0 +1,27 @@
+<?php
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('event_payment_methods', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('event_id')->constrained('events', 'id')->restrictOnDelete()->cascadeOnUpdate();
+            $table->string('slug');
+            $table->timestamps();
+
+            $table->foreign('slug')->references('slug')->on('payment_methods')->restrictOnDelete()->cascadeOnUpdate();
+            $table->unique(['event_id', 'slug']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('event_payment_methods');
+    }
+};

database/migrations/2026_07_28_140030_add_payment_method_to_event_participants.php

@@ -0,0 +1,25 @@
+<?php
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('event_participants', function (Blueprint $table) {
+            $table->string('payment_method')->nullable()->after('payment_purpose');
+            $table->foreign('payment_method')->references('slug')->on('payment_methods')->restrictOnDelete()->cascadeOnUpdate();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('event_participants', function (Blueprint $table) {
+            $table->dropForeign(['payment_method']);
+            $table->dropColumn('payment_method');
+        });
+    }
+};

database/migrations/2026_07_29_140010_add_configuration_to_available_payment_methods.php

@@ -0,0 +1,23 @@
+<?php
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('available_payment_methods', function (Blueprint $table) {
+            $table->json('configuration')->nullable();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('available_payment_methods', function (Blueprint $table) {
+            $table->dropColumn('configuration');
+        });
+    }
+};

database/migrations/2026_07_29_140020_add_configuration_to_event_payment_methods.php

@@ -0,0 +1,23 @@
+<?php
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('event_payment_methods', function (Blueprint $table) {
+            $table->json('configuration')->nullable();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('event_payment_methods', function (Blueprint $table) {
+            $table->dropColumn('configuration');
+        });
+    }
+};

database/migrations/2026_07_29_140030_fix_event_payment_methods_slug.php

@@ -0,0 +1,84 @@
+<?php
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+/**
+ * Reparatur-Migration für eine Drift in event_payment_methods:
+ *
+ * Eine frühere Version von 2026_07_28_140020_create_event_payment_methods hatte die Verknüpfung
+ * über available_payment_method_id (FK auf available_payment_methods.id) modelliert. Die Migration
+ * wurde später in-place auf slug (FK auf payment_methods.slug) umgestellt -- Systeme, die noch die
+ * alte Version ausgeführt haben, tragen daher available_payment_method_id statt slug.
+ *
+ * Diese Migration konvertiert solche Systeme verlustfrei auf slug. Auf Systemen, die bereits die
+ * korrekte slug-Struktur haben (frische Installationen), ist sie ein No-Op.
+ */
+return new class extends Migration {
+    public function up(): void
+    {
+        // Frisch / bereits korrekt -> nichts zu tun.
+        if (!Schema::hasColumn('event_payment_methods', 'available_payment_method_id')
+            || Schema::hasColumn('event_payment_methods', 'slug')) {
+            return;
+        }
+
+        // 1. slug zunächst nullable anlegen (für den Backfill).
+        Schema::table('event_payment_methods', function (Blueprint $table) {
+            $table->string('slug')->nullable()->after('event_id');
+        });
+
+        // 2. slug aus der verknüpften available_payment_methods-Zeile übernehmen.
+        DB::statement('
+            UPDATE event_payment_methods epm
+            JOIN available_payment_methods apm ON apm.id = epm.available_payment_method_id
+            SET epm.slug = apm.slug
+        ');
+
+        // 3. Alte Spalte samt FK entfernen.
+        Schema::table('event_payment_methods', function (Blueprint $table) {
+            $table->dropForeign(['available_payment_method_id']);
+            $table->dropColumn('available_payment_method_id');
+        });
+
+        // 4. slug final absichern: NOT NULL, Unique (event_id, slug), FK auf payment_methods.slug.
+        Schema::table('event_payment_methods', function (Blueprint $table) {
+            $table->string('slug')->nullable(false)->change();
+            $table->unique(['event_id', 'slug']);
+            $table->foreign('slug')->references('slug')->on('payment_methods')->restrictOnDelete()->cascadeOnUpdate();
+        });
+    }
+
+    public function down(): void
+    {
+        // Nur umkehren, wenn tatsächlich die slug-Struktur vorliegt.
+        if (!Schema::hasColumn('event_payment_methods', 'slug')
+            || Schema::hasColumn('event_payment_methods', 'available_payment_method_id')) {
+            return;
+        }
+
+        Schema::table('event_payment_methods', function (Blueprint $table) {
+            $table->unsignedBigInteger('available_payment_method_id')->nullable()->after('event_id');
+        });
+
+        // Backfill über den Tenant des Events, da available_payment_methods pro (tenant, slug) eindeutig ist.
+        DB::statement('
+            UPDATE event_payment_methods epm
+            JOIN events e ON e.id = epm.event_id
+            JOIN available_payment_methods apm ON apm.slug = epm.slug AND apm.tenant = e.tenant
+            SET epm.available_payment_method_id = apm.id
+        ');
+
+        Schema::table('event_payment_methods', function (Blueprint $table) {
+            $table->dropForeign(['slug']);
+            $table->dropUnique(['event_id', 'slug']);
+            $table->dropColumn('slug');
+        });
+
+        Schema::table('event_payment_methods', function (Blueprint $table) {
+            $table->unsignedBigInteger('available_payment_method_id')->nullable(false)->change();
+            $table->foreign('available_payment_method_id')->references('id')->on('available_payment_methods')->cascadeOnUpdate();
+        });
+    }
+};

database/migrations/2026_07_29_140040_create_payment_status.php

@@ -0,0 +1,19 @@
+<?php
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    public function up(): void
+    {
+        Schema::create('payment_status', function (Blueprint $table) {
+            $table->string('slug')->primary();
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('payment_status');
+    }
+};

database/migrations/2026_08_05_140010_add_payment_options_to_event_participants.php

@@ -0,0 +1,22 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    public function up(): void
+    {
+        Schema::table('event_participants', function (Blueprint $table) {
+            // Payer-seitige Eingaben der gewählten Zahlungsart (Schema je Modul: getParticipantOptions()).
+            $table->json('payment_options')->nullable()->after('payment_method');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('event_participants', function (Blueprint $table) {
+            $table->dropColumn('payment_options');
+        });
+    }
+};

database/migrations/2026_08_06_150000_add_tax_information_to_tenants.php

@@ -0,0 +1,29 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    public function up(): void
+    {
+        Schema::table('tenants', function (Blueprint $table) {
+            $table->boolean('tax_liable')->default(false);
+            $table->unsignedTinyInteger('vat_rate')->default(0);
+            $table->string('tax_exemption_reason')->default('youth_welfare');
+            $table->text('tax_exemption_note')->nullable();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('tenants', function (Blueprint $table) {
+            $table->dropColumn([
+                'tax_liable',
+                'vat_rate',
+                'tax_exemption_reason',
+                'tax_exemption_note',
+            ]);
+        });
+    }
+};

public/css/app.css

@@ -144,6 +144,10 @@ th:after {
     content: ":";
 }
 
+.empty:after {
+    content: "";
+}
+
 #show_username {
     position: relative;
     top: -30px;

resources/js/constants/paymentMethodIcons.js

@@ -0,0 +1,17 @@
+// Kuratierte Liste zahlungsrelevanter Font-Awesome-Solid-Icons für die Symbol-Auswahl einer
+// Zahlungsart. Die Namen sind über app/Views/Components/Icon.vue (free-solid) gedeckt und werden
+// beim Build gebündelt (kein Netzwerk-Load). value === icon (FA-Solid-Name im kebab-case).
+export const PAYMENT_METHOD_ICONS = [
+    {value: 'building-columns', label: 'Bank / Überweisung', icon: 'building-columns'},
+    {value: 'money-bill-wave', label: 'Bargeld', icon: 'money-bill-wave'},
+    {value: 'credit-card', label: 'Kreditkarte', icon: 'credit-card'},
+    {value: 'wallet', label: 'Geldbörse', icon: 'wallet'},
+    {value: 'coins', label: 'Münzen', icon: 'coins'},
+    {value: 'euro-sign', label: 'Euro', icon: 'euro-sign'},
+    {value: 'hand-holding-dollar', label: 'Spende', icon: 'hand-holding-dollar'},
+    {value: 'sack-dollar', label: 'Geldsack', icon: 'sack-dollar'},
+    {value: 'money-check-dollar', label: 'Scheck', icon: 'money-check-dollar'},
+    {value: 'receipt', label: 'Beleg', icon: 'receipt'},
+    {value: 'piggy-bank', label: 'Sparschwein', icon: 'piggy-bank'},
+    {value: 'mobile-screen', label: 'Mobil / App', icon: 'mobile-screen'},
+]

resources/views/emails/admin/cost_unit_invalid_billing_deadline.blade.php

@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+<body>
+<p>
+    Für die Kostenstelle "{{ $costUnitName }}" (ID {{ $costUnitId }}) konnte das Abrechnungsende
+    nicht verarbeitet werden.
+</p>
+<p>
+    Der hinterlegte Wert "{{ $invalidBillingDeadline }}" ist weder ein gültiges Datum noch ein
+    Datum mit Uhrzeit. Die automatische Verarbeitung dieser Kostenstelle wurde deshalb übersprungen.
+</p>
+<p>
+    Bitte prüft und korrigiert das Abrechnungsende dieser Kostenstelle.
+</p>
+</body>
+</html>

resources/views/emails/events/payment_methods_exhausted.blade.php

@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+<body>
+<p>
+    Für die Veranstaltung "{{ $eventTitle }}" wurde die letzte aktive Zahlungsmöglichkeit deaktiviert.
+</p>
+<p>
+    Die Anmeldung für diese Veranstaltung wurde deshalb automatisch deaktiviert, da aktuell keine
+    Zahlungsmöglichkeit mehr zur Verfügung steht.
+</p>
+<p>
+    Bitte aktiviert mindestens eine Zahlungsmöglichkeit für diese Veranstaltung, um die Anmeldung wieder
+    zu ermöglichen.
+</p>
+</body>
+</html>

resources/views/emails/events/signup_complete.blade.php

@@ -38,14 +38,9 @@
     </tr>
 </table>
 
-@if ($paymentRequired)
+@if ($paymentSummary['hasPaymentInformation'])
     <p>
-        Deine Teilnahme ist <strong>noch nicht bestätigt,</strong> da dsies erst nach vollständigem Zahlungseingang der
+        Zu deiner Anmeldung liegen noch folgende Zahlungsinformationen vor:
-        Fall ist.
-        Bitte zahle den Betrag in Höhe von <strong>{{$amount}}</strong> bis zum <strong>{{$paymentFinalDate}},</strong>
-        da andernfalls die Stornierung deiner Anmeldung erfolgen kann.
-
-        Um deine Anmeldung zu vervollständigen, überweise den Betrag bitte zugunsten folgender Bankverbindung:
     </p>
 
     <p>