E-Mails und Druckvorlage im neuen Design

E-Mail:
- Nachrichten werden in ein markentreues HTML-Gerüst gelegt (Tabellen +
  Inline-Styles, damit Outlook & Co. es zuverlässig darstellen); die
  Kopfleiste nutzt den eingestellten Markenverlauf
- neuer Platzhalter {VOUCHER_CARD} rendert den Code als hervorgehobene
  Karte; bestehende Vorlagen mit {VOUCHER_CODE} funktionieren unverändert
  weiter, sie werden lediglich eingerahmt
- Zeilenumbrüche der Vorlage werden vor dem Einsetzen der Platzhalter
  umgewandelt, Markup aus dem WYSIWYG-Editor bleibt unangetastet

Druck:
- neue Standardvorlage als Ticket mit QR-Code, Code, Gültigkeit und
  Anleitung; zentral in Ui::defaultPrintTemplate()
- neuer Platzhalter {QR_CODE}; der QR-Code wird lokal im Browser erzeugt
  (qrcodejs aus assets/vendor), auch bei Bulk-Erstellung für jede Karte
- die Druckvorlage ist am Bildschirm ausgeblendet und erscheint nur im
  Ausdruck

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

admin/settings.php

@@ -239,26 +239,10 @@ $cs = [
     'smtp_from_name'               => $db->getSetting('smtp_from_name', ''),
     'system_url'                   => $db->getSetting('system_url', $autoDetectedUrl),
     'email_voucher_subject'        => $db->getSetting('email_voucher_subject', '{APP_TITLE} - Ihr WLAN-Zugang'),
-    'email_voucher_body'           => $db->getSetting('email_voucher_body', "Hallo,\n\nIhr Code: {VOUCHER_CODE}\n\nGültigkeit: 8h\nGeräte: {MAX_USES}\nSite: {SITE_NAME}"),
+    'email_voucher_body'           => $db->getSetting('email_voucher_body', "Hallo,\n\nhier ist Ihr WLAN-Zugangscode:\n{VOUCHER_CARD}\n<strong>Maximale Geräte:</strong> {MAX_USES}<br>\n<strong>Standort:</strong> {SITE_NAME}\n\n{INSTRUCTIONS}\n\nViele Grüße\n{APP_TITLE}"),
     'email_user_notification_subject' => $db->getSetting('email_user_notification_subject', '{APP_TITLE} - Berechtigungen geändert'),
     'email_user_notification_body' => $db->getSetting('email_user_notification_body', "Hallo {USER_NAME},\n\n{CHANGES}"),
-    'print_template'               => $db->getSetting('print_template', '<div style="text-align:center;padding:40px"><h1>{APP_TITLE}</h1><h2>WLAN Code</h2><div style="font-size:48px;font-weight:bold;margin:30px 0;font-family:monospace">{VOUCHER_CODE}</div><p><strong>Gültig bis:</strong> {EXPIRY_DATE} {EXPIRY_TIME}</p><p><strong>Site:</strong> {SITE_NAME}</p><p><strong>Geräte:</strong> {MAX_USES}</p><hr style="margin:30px 0"><div>{INSTRUCTIONS}</div></div>'),
+    'print_template'               => $db->getSetting('print_template', Ui::defaultPrintTemplate()),
-    'brand_accent'                 => $db->getSetting('brand_accent', '') ?: Ui::DEFAULT_ACCENT,
-    'brand_accent_dark'            => $db->getSetting('brand_accent_dark', '') ?: Ui::DEFAULT_ACCENT_DARK,
-    'brand_gradient_from'          => $db->getSetting('brand_gradient_from', '') ?: Ui::DEFAULT_GRADIENT_FROM,
-    'brand_gradient_to'            => $db->getSetting('brand_gradient_to', '') ?: Ui::DEFAULT_GRADIENT_TO,
-    'brand_radius'                 => $db->getSetting('brand_radius', (string)Ui::DEFAULT_RADIUS),
-    'login_panel_enabled'          => $db->getSetting('login_panel_enabled', '1'),
-    'login_brand_name'             => $db->getSetting('login_brand_name', ''),
-    'login_logo_url'               => $db->getSetting('login_logo_url', ''),
-    'login_claim_title'            => $db->getSetting('login_claim_title', ''),
-    'login_claim_text'             => $db->getSetting('login_claim_text', ''),
-    'login_features'               => $db->getSetting('login_features', ''),
-    'login_footer'                 => $db->getSetting('login_footer', ''),
-    'login_bg_image'               => $db->getSetting('login_bg_image', ''),
-    'login_bg_from'                => $db->getSetting('login_bg_from', '#3b2f8f'),
-    'login_bg_to'                  => $db->getSetting('login_bg_to', '#6d5ce7'),
-    'login_bg_overlay'             => $db->getSetting('login_bg_overlay', '40'),
     'cron_token'                   => $db->getSetting('cron_token', ''),
     'last_cron_sync'               => $db->getSetting('last_cron_sync', ''),
 ];
@@ -644,12 +628,12 @@ $adminBase = '';
                 <div class="form-group"><label>System-URL</label><input type="url" name="system_url" value="<?= htmlspecialchars($cs['system_url']) ?>"><div class="help-text">Auto: <code><?= $autoDetectedUrl ?></code></div></div>
                 <hr class="section-divider">
                 <h3 style="margin-bottom:15px; color: var(--text-primary);"><?= __('settings_tpl_voucher_mail') ?></h3>
-                <div class="placeholder-info"><h4>Platzhalter:</h4><div class="placeholder-list"><code>{VOUCHER_CODE}</code><code>{SITE_NAME}</code><code>{MAX_USES}</code><code>{APP_TITLE}</code><code>{INSTRUCTIONS}</code></div></div>
+                <div class="placeholder-info"><h4><?= __('settings_placeholders') ?></h4><div class="placeholder-list"><code>{VOUCHER_CARD}</code><code>{VOUCHER_CODE}</code><code>{SITE_NAME}</code><code>{MAX_USES}</code><code>{APP_TITLE}</code><code>{INSTRUCTIONS}</code></div><p class="help-text"><?= __('settings_card_hint') ?></p></div>
                 <div class="form-group"><label>Betreff</label><input type="text" name="email_voucher_subject" value="<?= htmlspecialchars($cs['email_voucher_subject']) ?>"></div>
                 <div class="form-group"><label>E-Mail Text</label><textarea name="email_voucher_body" class="tinymce-editor"><?= htmlspecialchars($cs['email_voucher_body']) ?></textarea></div>
                 <hr class="section-divider">
                 <h3 style="margin-bottom:15px; color: var(--text-primary);"><?= __('settings_tpl_user_notify') ?></h3>
-                <div class="placeholder-info"><h4>Platzhalter:</h4><div class="placeholder-list"><code>{USER_NAME}</code><code>{CHANGES}</code><code>{APP_TITLE}</code><code>{SYSTEM_URL}</code></div></div>
+                <div class="placeholder-info"><h4><?= __('settings_placeholders') ?></h4><div class="placeholder-list"><code>{USER_NAME}</code><code>{CHANGES}</code><code>{APP_TITLE}</code><code>{SYSTEM_URL}</code></div></div>
                 <div class="form-group"><label>Betreff</label><input type="text" name="email_user_notification_subject" value="<?= htmlspecialchars($cs['email_user_notification_subject']) ?>"></div>
                 <div class="form-group"><label>E-Mail Text</label><textarea name="email_user_notification_body" class="tinymce-editor"><?= htmlspecialchars($cs['email_user_notification_body']) ?></textarea></div>
                 <button type="submit" name="save_settings" class="btn btn-primary"><i class="fas fa-save" aria-hidden="true"></i> <?= __('btn_save') ?></button>
@@ -669,7 +653,7 @@ $adminBase = '';
 
                 <hr class="section-divider">
                 <h3 style="margin-bottom:15px; color: var(--text-primary);">Druck-Template</h3>
-                <div class="placeholder-info"><h4>Platzhalter:</h4><div class="placeholder-list"><code>{VOUCHER_CODE}</code><code>{EXPIRY_DATE}</code><code>{EXPIRY_TIME}</code><code>{SITE_NAME}</code><code>{MAX_USES}</code><code>{APP_TITLE}</code><code>{INSTRUCTIONS}</code></div></div>
+                <div class="placeholder-info"><h4><?= __('settings_placeholders') ?></h4><div class="placeholder-list"><code>{QR_CODE}</code><code>{VOUCHER_CODE}</code><code>{EXPIRY_DATE}</code><code>{EXPIRY_TIME}</code><code>{SITE_NAME}</code><code>{MAX_USES}</code><code>{APP_TITLE}</code><code>{INSTRUCTIONS}</code></div><p class="help-text"><?= __('settings_qr_hint') ?></p></div>
                 <div class="form-group"><label><?= __('settings_print_template') ?></label><textarea name="print_template" class="tinymce-editor" style="min-height:250px;"><?= htmlspecialchars($cs['print_template']) ?></textarea></div>
                 <button type="submit" name="save_settings" class="btn btn-primary"><i class="fas fa-save" aria-hidden="true"></i> <?= __('btn_save') ?></button>
             </form>

assets/global.css

@@ -1531,6 +1531,10 @@ input.search-bar, .site-selector .search-bar { min-width: 240px; width: auto; fl
 .row3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
 @media (max-width: 720px) { .row, .row3 { grid-template-columns: 1fr; } }
 
+/* QR-Code auf der Druckkarte */
+.print-qr { display: flex; justify-content: center; line-height: 0; }
+.print-qr img, .print-qr canvas { display: block; }
+
 /* Sprungmarke zum Inhalt (nur bei Tastaturfokus sichtbar) */
 .skip-link {
     position: absolute;

includes/Mailer.php

@@ -172,6 +172,56 @@ class Mailer {
     }
     
     // Vordefinierte E-Mail-Templates
+    /**
+     * Legt den Nachrichtentext in ein schlichtes, markentreues HTML-Gerüst.
+     * Bewusst Tabellen + Inline-Styles: nur so rendern Outlook & Co. zuverlässig.
+     */
+    private function brandedHtml(string $title, string $contentHtml, string $footerNote = ''): string
+    {
+        $accent = $this->db->getSetting('brand_gradient_from', '') ?: '#5b5bd6';
+        $accent2 = $this->db->getSetting('brand_gradient_to', '') ?: '#8b5cf6';
+        if (!preg_match('/^#[0-9a-fA-F]{6}$/', $accent))  { $accent = '#5b5bd6'; }
+        if (!preg_match('/^#[0-9a-fA-F]{6}$/', $accent2)) { $accent2 = '#8b5cf6'; }
+
+        $safeTitle = htmlspecialchars($title, ENT_QUOTES, 'UTF-8');
+        $year = date('Y');
+        $footer = $footerNote !== '' ? '<div style="margin-top:8px;">' . htmlspecialchars($footerNote, ENT_QUOTES, 'UTF-8') . '</div>' : '';
+
+        return '<!DOCTYPE html><html><head><meta charset="UTF-8">'
+            . '<meta name="viewport" content="width=device-width, initial-scale=1.0">'
+            . '<title>' . $safeTitle . '</title></head>'
+            . '<body style="margin:0;padding:0;background:#f6f7f9;">'
+            . '<table role="presentation" width="100%" cellpadding="0" cellspacing="0" style="background:#f6f7f9;padding:28px 12px;">'
+            . '<tr><td align="center">'
+            . '<table role="presentation" width="600" cellpadding="0" cellspacing="0" style="max-width:600px;width:100%;background:#ffffff;border:1px solid #e5e8ee;border-radius:14px;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,\'Segoe UI\',Roboto,Helvetica,Arial,sans-serif;">'
+            . '<tr><td style="background:' . $accent . ';background-image:linear-gradient(135deg,' . $accent . ' 0%,' . $accent2 . ' 100%);padding:22px 26px;">'
+            . '<div style="color:#ffffff;font-size:16px;font-weight:600;letter-spacing:-0.01em;">' . $safeTitle . '</div>'
+            . '</td></tr>'
+            . '<tr><td style="padding:26px;color:#101625;font-size:15px;line-height:1.6;">' . $contentHtml . '</td></tr>'
+            . '<tr><td style="padding:16px 26px;background:#f8f9fb;border-top:1px solid #e5e8ee;color:#6b7280;font-size:12px;">'
+            . '&copy; ' . $year . ' ' . $safeTitle . $footer
+            . '</td></tr>'
+            . '</table></td></tr></table></body></html>';
+    }
+
+    /**
+     * Voucher-Code als hervorgehobene Karte für die E-Mail.
+     */
+    private function voucherCardHtml(string $code, string $siteName, $maxUses): string
+    {
+        return '<table role="presentation" width="100%" cellpadding="0" cellspacing="0" '
+            . 'style="margin:18px 0;background:#f8f9fb;border:1px solid #e5e8ee;border-radius:12px;">'
+            . '<tr><td align="center" style="padding:22px;">'
+            . '<div style="font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:#6b7280;">'
+            . htmlspecialchars($siteName, ENT_QUOTES, 'UTF-8') . '</div>'
+            . '<div style="margin:10px 0;font-family:Consolas,Menlo,monospace;font-size:28px;font-weight:700;letter-spacing:.12em;color:#101625;">'
+            . htmlspecialchars($code, ENT_QUOTES, 'UTF-8') . '</div>'
+            . '<div style="font-size:13px;color:#525c6e;">'
+            . htmlspecialchars((string)$maxUses, ENT_QUOTES, 'UTF-8') . ' '
+            . htmlspecialchars(function_exists('__') ? __('label_devices') : 'Geräte', ENT_QUOTES, 'UTF-8') . '</div>'
+            . '</td></tr></table>';
+    }
+
     public function sendVoucherEmail($to, $voucherCode, $siteName, $maxUses) {
         $appTitle = $this->db->getSetting('app_title', 'UniFi Voucher System');
         $instructionHeader = $this->db->getSetting('instruction_header', '');
@@ -189,7 +239,7 @@ class Mailer {
         
         // Template aus Datenbank laden
         $subjectTemplate = $this->db->getSetting('email_voucher_subject', '{APP_TITLE} - Ihr WLAN-Zugang');
-        $bodyTemplate = $this->db->getSetting('email_voucher_body', "Hallo,\n\nIhr WLAN-Zugangscode lautet:\n\n<strong>{VOUCHER_CODE}</strong>\n\nGültigkeit: 8 Stunden ab Erstellung\nMaximale Geräte: {MAX_USES}\nStandort: {SITE_NAME}\n\n{INSTRUCTIONS}\n\nMit freundlichen Grüßen\n{APP_TITLE}");
+        $bodyTemplate = $this->db->getSetting('email_voucher_body', "Hallo,\n\nhier ist Ihr WLAN-Zugangscode:\n{VOUCHER_CARD}\n<strong>Maximale Geräte:</strong> {MAX_USES}<br>\n<strong>Standort:</strong> {SITE_NAME}\n\n{INSTRUCTIONS}\n\nViele Grüße\n{APP_TITLE}");
         
         // Anleitung formatieren
         $instructions = '';
@@ -199,6 +249,7 @@ class Mailer {
         
         // Platzhalter ersetzen
         $placeholders = [
+            '{VOUCHER_CARD}' => $this->voucherCardHtml($voucherCode, (string)$siteName, $maxUses),
             '{VOUCHER_CODE}' => $voucherCode,
             '{SITE_NAME}' => $siteName,
             '{MAX_USES}' => $maxUses,
@@ -208,10 +259,16 @@ class Mailer {
         ];
 
         $subject = str_replace(array_keys($placeholders), array_values($placeholders), $subjectTemplate);
-        $body = str_replace(array_keys($placeholders), array_values($placeholders), $bodyTemplate);
 
-        // HTML oder Plain Text prüfen
+        // Umbrueche der Vorlage vor dem Einsetzen der Platzhalter umwandeln,
-        $isHtml = strip_tags($body) !== $body;
+        // sonst wuerde das Markup der Voucher-Karte die Erkennung stoeren.
+        $isHtml = strip_tags($bodyTemplate) !== $bodyTemplate || strpos($bodyTemplate, '{VOUCHER_CARD}') !== false;
+        $template = $isHtml ? $this->textToHtml($bodyTemplate) : $bodyTemplate;
+        $body = str_replace(array_keys($placeholders), array_values($placeholders), $template);
+
+        if ($isHtml) {
+            $body = $this->brandedHtml($appTitle, $body);
+        }
 
         return $this->send($to, $subject, $body, $isHtml);
     }
@@ -255,11 +312,28 @@ class Mailer {
         ];
         
         $subject = str_replace(array_keys($placeholders), array_values($placeholders), $subjectTemplate);
-        $body = str_replace(array_keys($placeholders), array_values($placeholders), $bodyTemplate);
 
-        // HTML oder Plain Text prüfen
+        $isHtml = strip_tags($bodyTemplate) !== $bodyTemplate;
-        $isHtml = strip_tags($body) !== $body;
+        $template = $isHtml ? $this->textToHtml($bodyTemplate) : $bodyTemplate;
+        $body = str_replace(array_keys($placeholders), array_values($placeholders), $template);
+
+        if ($isHtml) {
+            $body = $this->brandedHtml($appTitle, $body);
+        }
 
         return $this->send($to, $subject, $body, $isHtml);
     }
+
+    /**
+     * Zeilenumbrüche aus dem Vorlagentext in HTML übernehmen, ohne bereits
+     * vorhandenes Markup (z. B. aus dem WYSIWYG-Editor) zu zerstören.
+     */
+    private function textToHtml(string $body): string
+    {
+        if (preg_match('#<(p|div|ul|ol|h[1-6])[\s>]#i', $body)) {
+            return $body;
+        }
+
+        return nl2br($body, false);
+    }
 }

includes/Ui.php

@@ -116,6 +116,26 @@ class Ui
             . '</style>';
     }
 
+    /**
+     * Standard-Druckvorlage (wird nur verwendet, solange keine eigene
+     * Vorlage gespeichert ist). {QR_CODE} fuellt der Browser.
+     */
+    public static function defaultPrintTemplate(): string
+    {
+        $validUntil = function_exists('__') ? __('print_valid_until') : 'Gültig bis';
+        $devices    = function_exists('__') ? __('print_devices') : 'Geräte';
+
+        return '<div style="font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;'
+            . 'max-width:420px;margin:0 auto;padding:26px;border:1px dashed #9aa1ae;border-radius:14px;text-align:center;">'
+            . '<div style="font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:#6b7280;">{APP_TITLE}</div>'
+            . '<div style="margin:6px 0 18px;font-size:15px;color:#101625;">{SITE_NAME}</div>'
+            . '{QR_CODE}'
+            . '<div style="margin:18px 0 6px;font-family:Consolas,Menlo,monospace;font-size:30px;font-weight:700;letter-spacing:.14em;color:#101625;">{VOUCHER_CODE}</div>'
+            . '<div style="font-size:13px;color:#525c6e;">' . $validUntil . ' {EXPIRY_DATE} {EXPIRY_TIME} &middot; {MAX_USES} ' . $devices . '</div>'
+            . '<div style="margin-top:16px;padding-top:14px;border-top:1px solid #e5e8ee;font-size:12px;color:#525c6e;text-align:left;">{INSTRUCTIONS}</div>'
+            . '</div>';
+    }
+
     /**
      * URL eines Bildes aus den Einstellungen.
      * Hochgeladene Dateien liegen relativ zur Projektwurzel (uploads/…),

index.php

@@ -75,7 +75,7 @@ $instructionHeader = $db->getSetting('instruction_header', '');
 $instructionText   = $db->getSetting('instruction_text', '');
 $publicAccess      = $db->getSetting('public_access', 0);
 $smtpEnabled       = $db->getSetting('smtp_enabled', '0') === '1';
-$printTemplate     = $db->getSetting('print_template', '<div style="text-align:center;padding:40px;font-family:sans-serif;"><h1>{APP_TITLE}</h1><h2>WLAN Zugangscode</h2><div style="font-size:48px;font-weight:bold;margin:30px 0;font-family:monospace;letter-spacing:4px;">{VOUCHER_CODE}</div><p><strong>Gültig bis:</strong> {EXPIRY_DATE} {EXPIRY_TIME}</p><p><strong>Standort:</strong> {SITE_NAME}</p><p><strong>Maximale Geräte:</strong> {MAX_USES}</p><hr style="margin:30px 0;"><div style="font-size:14px;text-align:left;">{INSTRUCTIONS}</div></div>');
+$printTemplate     = $db->getSetting('print_template', Ui::defaultPrintTemplate());
 $defaultExpire     = max(1, (int)$db->getSetting('default_expire_minutes', 480));
 $defaultMaxUses    = max(1, (int)$db->getSetting('default_max_uses', 1));
 $maxUsesLimit      = max(1, (int)$db->getSetting('max_uses_limit', 10));
@@ -272,9 +272,12 @@ function buildPrintCard($template, $data, $instructionHeader, $instructionText,
     $instructions = $instructionHeader || $instructionText
         ? htmlspecialchars($instructionHeader) . "\n" . $instructionText
         : '';
+    // {QR_CODE} wird erst im Browser gefuellt (siehe renderPrintQr()).
+    $qr = '<div class="print-qr" data-code="' . htmlspecialchars(str_replace('-', '', (string)$data['code']), ENT_QUOTES) . '"></div>';
+
     return str_replace(
-        ['{VOUCHER_CODE}', '{SITE_NAME}', '{MAX_USES}', '{APP_TITLE}', '{INSTRUCTIONS}', '{EXPIRY_DATE}', '{EXPIRY_TIME}'],
+        ['{QR_CODE}', '{VOUCHER_CODE}', '{SITE_NAME}', '{MAX_USES}', '{APP_TITLE}', '{INSTRUCTIONS}', '{EXPIRY_DATE}', '{EXPIRY_TIME}'],
-        [$data['code'], htmlspecialchars($data['site_name']), $data['max_uses'], htmlspecialchars($appTitle), $instructions, $data['expiry_date'], $data['expiry_time']],
+        [$qr, $data['code'], htmlspecialchars($data['site_name']), $data['max_uses'], htmlspecialchars($appTitle), $instructions, $data['expiry_date'], $data['expiry_time']],
         $template
     );
 }
@@ -289,7 +292,7 @@ function buildPrintCard($template, $data, $instructionHeader, $instructionText,
     <?php if ($captchaMode === 'hcaptcha' && $hcaptchaSiteKey !== ''): ?>
     <script src="https://js.hcaptcha.com/1/api.js" async defer></script>
     <?php endif; ?>
-    <?php if ($voucherCreated): ?>
+    <?php if ($voucherCreated || $bulkCreated): ?>
     <?= Ui::script('assets/vendor/qrcodejs/qrcode.min.js') ?>
     <?php endif; ?>
     <style>
@@ -635,6 +638,23 @@ function buildPrintCard($template, $data, $instructionHeader, $instructionText,
 <div id="toast-container" role="status" aria-live="polite"></div>
 <script src="assets/global.js"></script>
 <script>
+    <?php if ($voucherCreated || $bulkCreated): ?>
+    // QR-Codes der Druckkarten erzeugen (im Browser, ohne externen Dienst)
+    function renderPrintQr() {
+        document.querySelectorAll('.print-qr').forEach(function (el) {
+            if (el.dataset.done) return;
+            el.dataset.done = '1';
+            new QRCode(el, {
+                text: el.dataset.code || '',
+                width: 132, height: 132,
+                colorDark: '#101625', colorLight: '#ffffff',
+                correctLevel: QRCode.CorrectLevel.M
+            });
+        });
+    }
+    document.addEventListener('DOMContentLoaded', renderPrintQr);
+    <?php endif; ?>
+
     <?php if ($voucherCreated): ?>
     document.addEventListener('DOMContentLoaded', function() {
         new QRCode(document.getElementById('qrcode'), {

lang/de.php

@@ -464,6 +464,11 @@ return [
     'vouchers_resend'              => 'Per E-Mail senden',
     'label_minutes_short'          => 'Min.',
     'js_copy'                      => 'Kopieren',
+    'settings_placeholders'        => 'Platzhalter:',
+    'settings_card_hint'           => '{VOUCHER_CARD} rendert den Code als hervorgehobene Karte im Marken-Layout.',
+    'settings_qr_hint'             => '{QR_CODE} fügt einen QR-Code mit dem Voucher-Code ein.',
+    'print_valid_until'            => 'Gültig bis',
+    'print_devices'                => 'Geräte',
     'settings_tab_general'  => 'Allgemein',
     'settings_tab_defaults' => 'Voucher-Standards',
     'settings_tab_cron'     => 'Cron-Sync',

lang/en.php

@@ -464,6 +464,11 @@ return [
     'vouchers_resend'              => 'Send by email',
     'label_minutes_short'          => 'min',
     'js_copy'                      => 'Copy',
+    'settings_placeholders'        => 'Placeholders:',
+    'settings_card_hint'           => '{VOUCHER_CARD} renders the code as a highlighted card in the branded layout.',
+    'settings_qr_hint'             => '{QR_CODE} inserts a QR code containing the voucher code.',
+    'print_valid_until'            => 'Valid until',
+    'print_devices'                => 'devices',
     'settings_tab_general'  => 'General',
     'settings_tab_defaults' => 'Voucher Defaults',
     'settings_tab_cron'     => 'Cron Sync',

tools/demo/overlay/includes/Database.php

@@ -18,7 +18,6 @@ class Database {
         'trusted_proxy' => '10.0.0.1, 172.18.0.1',
         'cleanup_expired_days' => '90', 'cleanup_audit_days' => '365', 'cleanup_login_days' => '30',
         'last_cleanup' => '2026-09-22 03:00:00',
-        'print_template' => '<div style="padding:20px;border:1px dashed #999;"><h2>{APP_TITLE}</h2><p>{SITE_NAME}</p><h1>{VOUCHER_CODE}</h1></div>',
     ];
     public function __construct()
     {