Add email templates, page layouts, and shop themes (template system)

- E-Mail-Templates: DB-gespeicherte HTML-Templates mit {{placeholder}}-System,
  Admin-UI zum Bearbeiten von Betreff und Body, alle 4 Mailables aktualisiert
- Seiten-Layouts: 4 Layouts für CMS-Seiten (Standard, Sidebar, Volle Breite, Landing),
  Layout-Auswahl im Admin-Formular
- Shop-Themes: 5 Farbthemen via CSS-Variablen, Picker in Einstellungen
- Deployment: EmailTemplateSeeder wird automatisch beim Deploy ausgeführt

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Http/Controllers/Admin/EmailTemplateController.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Http\Controllers\Admin;
+
+use App\Http\Controllers\Controller;
+use App\Models\EmailTemplate;
+use Illuminate\Http\Request;
+
+class EmailTemplateController extends Controller
+{
+    public function index()
+    {
+        $templates = EmailTemplate::orderBy('label')->get();
+        return view('admin.email-templates.index', compact('templates'));
+    }
+
+    public function edit(EmailTemplate $emailTemplate)
+    {
+        return view('admin.email-templates.edit', ['template' => $emailTemplate]);
+    }
+
+    public function update(Request $request, EmailTemplate $emailTemplate)
+    {
+        $request->validate([
+            'subject' => 'required|string|max:255',
+            'body'    => 'required|string',
+        ]);
+
+        $emailTemplate->update([
+            'subject' => $request->input('subject'),
+            'body'    => $request->input('body'),
+        ]);
+
+        return back()->with('success', 'E-Mail-Template gespeichert.');
+    }
+}

app/Http/Controllers/Admin/PageController.php

@@ -59,11 +59,13 @@ class PageController extends Controller
             'show_in_footer'   => 'boolean',
             'show_in_nav'      => 'boolean',
             'nav_sort'         => 'integer|min:0',
+            'layout'           => 'nullable|in:default,sidebar,full,landing',
         ]);
         $data['slug']           = $data['slug'] ? Str::slug($data['slug']) : Str::slug($data['title']);
         $data['published']      = $request->boolean('published');
         $data['show_in_footer'] = $request->boolean('show_in_footer');
         $data['show_in_nav']    = $request->boolean('show_in_nav');
+        $data['layout']         = $request->input('layout', 'default');
         return $data;
     }
 }

app/Http/Controllers/Admin/SettingsController.php

@@ -13,6 +13,7 @@ class SettingsController extends Controller
         'bank_name','bank_iban','bank_bic','invoice_payment_days',
         'smtp_host','smtp_port','smtp_user','smtp_password','smtp_from_name','smtp_from_email',
         'cookie_consent','google_analytics','require_customer_approval',
+        'theme_name',
     ];
 
     public function index()

app/Mail/OrderConfirmationMail.php

@@ -2,6 +2,7 @@
 
 namespace App\Mail;
 
+use App\Models\EmailTemplate;
 use App\Models\Order;
 use App\Models\Setting;
 use Illuminate\Bus\Queueable;
@@ -16,8 +17,71 @@ class OrderConfirmationMail extends Mailable
 
     public function build()
     {
+        $order    = $this->order;
+        $template = EmailTemplate::getByKey('order_confirmation');
+
+        if (!$template) {
+            return $this
+                ->subject('Bestellbestätigung ' . $order->order_number . ' – ' . Setting::get('shop_name'))
+                ->view('emails.order_confirmation');
+        }
+
+        $itemRows = '';
+        foreach ($order->items as $item) {
+            $variant  = $item->variant_label ? ' <small>(' . e($item->variant_label) . ')</small>' : '';
+            $itemRows .= '<tr>'
+                . '<td style="padding:8px;border-bottom:1px solid #eee">' . e($item->product_name) . $variant . '</td>'
+                . '<td style="padding:8px;border-bottom:1px solid #eee">' . $item->quantity . '</td>'
+                . '<td style="padding:8px;border-bottom:1px solid #eee">' . number_format($item->unit_price, 2, ',', '.') . ' €</td>'
+                . '<td style="padding:8px;border-bottom:1px solid #eee">' . number_format($item->line_total, 2, ',', '.') . ' €</td>'
+                . '</tr>';
+        }
+        $itemsTable = '<table style="width:100%;border-collapse:collapse">'
+            . '<thead><tr>'
+            . '<th style="padding:8px;background:#f8fafc;text-align:left">Artikel</th>'
+            . '<th style="padding:8px;background:#f8fafc;text-align:left">Menge</th>'
+            . '<th style="padding:8px;background:#f8fafc;text-align:left">Einzelpreis</th>'
+            . '<th style="padding:8px;background:#f8fafc;text-align:left">Gesamt</th>'
+            . '</tr></thead><tbody>' . $itemRows . '</tbody>'
+            . '<tfoot>'
+            . '<tr><td colspan="3" style="padding:8px">Zwischensumme</td><td style="padding:8px">' . number_format($order->subtotal, 2, ',', '.') . ' €</td></tr>'
+            . '<tr><td colspan="3" style="padding:8px">Versand</td><td style="padding:8px">' . number_format($order->shipping_cost, 2, ',', '.') . ' €</td></tr>'
+            . '<tr style="font-weight:bold"><td colspan="3" style="padding:8px">Gesamt (inkl. MwSt.)</td><td style="padding:8px">' . number_format($order->total, 2, ',', '.') . ' €</td></tr>'
+            . '</tfoot></table>';
+
+        if ($order->payment_method === 'prepayment') {
+            $paymentInfo = '<div style="background:#f8fafc;padding:16px;border-radius:8px;margin:16px 0">'
+                . '<strong>Bitte überweisen Sie den Betrag auf folgendes Konto:</strong><br>'
+                . 'Empfänger: ' . e(Setting::get('shop_owner')) . '<br>'
+                . 'Bank: ' . e(Setting::get('bank_name')) . '<br>'
+                . 'IBAN: ' . e(Setting::get('bank_iban')) . '<br>'
+                . 'BIC: ' . e(Setting::get('bank_bic')) . '<br>'
+                . 'Verwendungszweck: <strong>' . e($order->order_number) . '</strong><br>'
+                . 'Betrag: <strong>' . number_format($order->total, 2, ',', '.') . ' €</strong>'
+                . '</div>';
+        } else {
+            $days = Setting::get('invoice_payment_days', 14);
+            $paymentInfo = '<div style="background:#f8fafc;padding:16px;border-radius:8px;margin:16px 0">'
+                . 'Sie erhalten Ihre Rechnung separat per E-Mail.<br>'
+                . 'Zahlungsziel: ' . $days . ' Tage nach Rechnungserhalt.'
+                . '</div>';
+        }
+
+        $customerName = $order->billingAddress()?->full_name ?? $order->guest_email;
+
+        $data = [
+            'customer_name'      => $customerName,
+            'order_number'       => $order->order_number,
+            'order_total'        => number_format($order->total, 2, ',', '.'),
+            'payment_info'       => $paymentInfo,
+            'order_items_table'  => $itemsTable,
+            'shop_name'          => Setting::get('shop_name'),
+            'shop_email'         => Setting::get('shop_email'),
+            'shop_address'       => Setting::get('shop_address'),
+        ];
+
         return $this
-            ->subject('Bestellbestätigung ' . $this->order->order_number . ' – ' . Setting::get('shop_name'))
-            ->view('emails.order_confirmation');
+            ->subject($template->renderSubject($data))
+            ->html($template->renderBody($data));
     }
 }

app/Mail/OrderShippedMail.php

@@ -2,6 +2,7 @@
 
 namespace App\Mail;
 
+use App\Models\EmailTemplate;
 use App\Models\Order;
 use App\Models\Setting;
 use Illuminate\Bus\Queueable;
@@ -16,8 +17,32 @@ class OrderShippedMail extends Mailable
 
     public function build()
     {
+        $order    = $this->order;
+        $template = EmailTemplate::getByKey('order_shipped');
+
+        if (!$template) {
+            return $this
+                ->subject('Ihre Bestellung wurde versendet – ' . $order->order_number)
+                ->view('emails.order_shipped');
+        }
+
+        $trackingInfo = $order->tracking_code
+            ? '<div style="background:#f0fdf4;padding:16px;border-radius:8px;border:1px solid #86efac;margin:16px 0">'
+              . '<strong>Sendungsverfolgung:</strong><br>'
+              . 'Tracking-Nummer: <strong>' . e($order->tracking_code) . '</strong>'
+              . '</div>'
+            : '';
+
+        $data = [
+            'order_number'  => $order->order_number,
+            'tracking_code' => $order->tracking_code ?? '',
+            'tracking_info' => $trackingInfo,
+            'shop_name'     => Setting::get('shop_name'),
+            'shop_email'    => Setting::get('shop_email'),
+        ];
+
         return $this
-            ->subject('Ihre Bestellung wurde versendet – ' . $this->order->order_number)
-            ->view('emails.order_shipped');
+            ->subject($template->renderSubject($data))
+            ->html($template->renderBody($data));
     }
 }

app/Mail/PaymentReceivedMail.php

@@ -2,6 +2,7 @@
 
 namespace App\Mail;
 
+use App\Models\EmailTemplate;
 use App\Models\Order;
 use App\Models\Setting;
 use Illuminate\Bus\Queueable;
@@ -20,9 +21,29 @@ class PaymentReceivedMail extends Mailable
 
     public function build()
     {
+        $order    = $this->order;
+        $template = EmailTemplate::getByKey('payment_received');
+
+        if (!$template) {
+            return $this
+                ->subject('Ihre Rechnung – ' . $order->order_number . ' – ' . Setting::get('shop_name'))
+                ->view('emails.payment_received')
+                ->attachData($this->pdfContent, $this->pdfFilename, ['mime' => 'application/pdf']);
+        }
+
+        $customerName = $order->billingAddress()?->full_name ?? $order->guest_email;
+
+        $data = [
+            'customer_name' => $customerName,
+            'order_number'  => $order->order_number,
+            'order_total'   => number_format($order->total, 2, ',', '.'),
+            'shop_name'     => Setting::get('shop_name'),
+            'shop_email'    => Setting::get('shop_email'),
+        ];
+
         return $this
-            ->subject('Ihre Rechnung – ' . $this->order->order_number . ' – ' . Setting::get('shop_name'))
-            ->view('emails.payment_received')
+            ->subject($template->renderSubject($data))
+            ->html($template->renderBody($data))
             ->attachData($this->pdfContent, $this->pdfFilename, ['mime' => 'application/pdf']);
     }
 }

app/Mail/WiderrufsformularMail.php

@@ -2,6 +2,7 @@
 
 namespace App\Mail;
 
+use App\Models\EmailTemplate;
 use App\Models\Setting;
 use Illuminate\Bus\Queueable;
 use Illuminate\Mail\Mailable;
@@ -18,10 +19,32 @@ class WiderrufsformularMail extends Mailable
 
     public function build()
     {
-        $subject = $this->isConfirmation
-            ? 'Bestätigung Ihres Widerrufs – ' . Setting::get('shop_name')
-            : 'Neues Widerrufsformular eingegangen';
+        if (!$this->isConfirmation) {
+            $subject = 'Neues Widerrufsformular eingegangen';
+            return $this->subject($subject)->view('emails.widerruf');
+        }
 
-        return $this->subject($subject)->view('emails.widerruf');
+        $template = EmailTemplate::getByKey('widerruf_confirmation');
+
+        if (!$template) {
+            return $this
+                ->subject('Bestätigung Ihres Widerrufs – ' . Setting::get('shop_name'))
+                ->view('emails.widerruf');
+        }
+
+        $vars = [
+            'customer_name'          => $this->data['name'],
+            'widerruf_name'          => $this->data['name'],
+            'widerruf_email'         => $this->data['email'],
+            'widerruf_order_number'  => $this->data['order_number'] ?? '—',
+            'widerruf_product'       => $this->data['product'],
+            'widerruf_date'          => $this->data['date'],
+            'widerruf_reason'        => $this->data['reason'] ?? '—',
+            'shop_name'              => Setting::get('shop_name'),
+        ];
+
+        return $this
+            ->subject($template->renderSubject($vars))
+            ->html($template->renderBody($vars));
     }
 }

app/Models/EmailTemplate.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class EmailTemplate extends Model
+{
+    protected $fillable = ['key', 'label', 'subject', 'body', 'variables'];
+    protected $casts = ['variables' => 'array'];
+
+    public static function getByKey(string $key): ?self
+    {
+        return static::where('key', $key)->first();
+    }
+
+    public function renderBody(array $data): string
+    {
+        $body = $this->body;
+        foreach ($data as $k => $v) {
+            $body = str_replace('{{' . $k . '}}', (string) $v, $body);
+        }
+        return $body;
+    }
+
+    public function renderSubject(array $data): string
+    {
+        $subject = $this->subject;
+        foreach ($data as $k => $v) {
+            $subject = str_replace('{{' . $k . '}}', (string) $v, $subject);
+        }
+        return $subject;
+    }
+}

app/Models/Page.php

@@ -6,7 +6,7 @@ use Illuminate\Database\Eloquent\Model;
 
 class Page extends Model
 {
-    protected $fillable = ['slug','title','content','type','image','meta_title','meta_description','published','published_at','show_in_footer','show_in_nav','nav_sort'];
+    protected $fillable = ['slug','title','content','type','image','meta_title','meta_description','published','published_at','show_in_footer','show_in_nav','nav_sort','layout'];
 
     protected $casts = ['published' => 'boolean', 'published_at' => 'datetime', 'show_in_footer' => 'boolean', 'show_in_nav' => 'boolean'];
 }