function view_dns_show(array $app, array $data): string
{
    $domain = $data['domain'];
    $zone = $data['zone'] ?? null;

    $recordRows = '';
    foreach (($zone['records'] ?? []) as $record) {
        $recordRows .= '
            <tr>
                <td>' . app_h($record['rr_name'] ?? '') . '</td>
                <td>' . app_h($record['rr_type'] ?? '') . '</td>
                <td>' . app_h($record['rr_content'] ?? '') . '</td>
                <td>' . app_h((string)($record['rr_ttl'] ?? '')) . '</td>
                <td>
                    <form method="post" action="/dns/record-delete">
                        <input type="hidden" name="_token" value="' . app_h($app['csrf']) . '">
                        <input type="hidden" name="domain_id" value="' . (int)$domain['id'] . '">
                        <input type="hidden" name="record_id" value="' . app_h((string)($record['provider_record_id'] ?? '')) . '">
                        <button class="btn btn-danger-soft btn-sm" type="submit" data-confirm="Record löschen?">Löschen</button>
                    </form>
                </td>
            </tr>
        ';
    }

    if ($recordRows === '') {
        $recordRows = '<tr><td colspan="5"><div class="empty-state">Keine DNS-Records vorhanden.</div></td></tr>';
    }

    return app_layout($app, [
        'title' => 'DNS',
        'content' => '
            <div class="page-wrap">
                <div class="page-head">
                    <div>
                        <h1 class="page-title">DNS für ' . app_h($domain['domain_name']) . '</h1>
                        <p class="page-text">Zone synchronisieren und Records verwalten.</p>
                    </div>
                    <div class="page-actions">
                        <form method="post" action="/dns/zone-sync">
                            <input type="hidden" name="_token" value="' . app_h($app['csrf']) . '">
                            <input type="hidden" name="domain_id" value="' . (int)$domain['id'] . '">
                            <button class="btn btn-secondary" type="submit">Zone synchronisieren</button>
                        </form>
                    </div>
                </div>

                <div class="grid grid-2" style="margin-bottom:18px;">
                    <div class="card">
                        <div class="card-header"><h2 class="card-title">Zoneninfo</h2></div>
                        <div class="card-body">
                            <div class="kv">
                                <div class="kv-key">Origin</div>
                                <div class="kv-value">' . app_h($zone['soa_origin'] ?? (string)$domain['domain_name']) . '</div>
                                <div class="kv-key">Serial</div>
                                <div class="kv-value">' . app_h($zone['provider_serial'] ?? '') . '</div>
                                <div class="kv-key">Quelle</div>
                                <div class="kv-value">' . app_h($zone['source'] ?? '') . '</div>
                                <div class="kv-key">Letzter Sync</div>
                                <div class="kv-value">' . app_h($zone['last_synced_at'] ?? '') . '</div>
                            </div>
                        </div>
                    </div>

                    <div class="card">
                        <div class="card-header"><h2 class="card-title">Record anlegen</h2></div>
                        <div class="card-body">
                            <form method="post" action="/dns/record-create" class="form-grid">
                                <input type="hidden" name="_token" value="' . app_h($app['csrf']) . '">
                                <input type="hidden" name="domain_id" value="' . (int)$domain['id'] . '">

                                <div class="col-6 form-field">
                                    <label class="form-label">Name</label>
                                    <input class="input" type="text" name="rr_name" value="@">
                                </div>

                                <div class="col-6 form-field">
                                    <label class="form-label">Typ</label>
                                    <select class="select" name="rr_type">
                                        ' . select_options_simple(['A','AAAA','CNAME','MX','TXT','NS','SRV'], 'A') . '
                                    </select>
                                </div>

                                <div class="col-6 form-field">
                                    <label class="form-label">Content</label>
                                    <input class="input" type="text" name="rr_content" required>
                                </div>

                                <div class="col-3 form-field">
                                    <label class="form-label">TTL</label>
                                    <input class="input" type="number" name="rr_ttl" value="3600">
                                </div>

                                <div class="col-3 form-field">
                                    <label class="form-label">Prio</label>
                                    <input class="input" type="number" name="rr_prio">
                                </div>

                                <div class="col-12">
                                    <button class="btn btn-primary" type="submit">Record anlegen</button>
                                </div>
                            </form>
                        </div>
                    </div>
                </div>

                <div class="card">
                    <div class="card-header"><h2 class="card-title">DNS-Records</h2></div>
                    <div class="card-body table-wrap">
                        <table class="table">
                            <thead>
                                <tr>
                                    <th>Name</th>
                                    <th>Typ</th>
                                    <th>Content</th>
                                    <th>TTL</th>
                                    <th></th>
                                </tr>
                            </thead>
                            <tbody>' . $recordRows . '</tbody>
                        </table>
                    </div>
                </div>
            </div>
        ',
    ]);
}

function view_price_list_index(array $app, array $data): string
{
    $prices = $data['prices'] ?? [];
    $resellers = $data['resellers'] ?? [];
    $resellerId = (int)($data['reseller_id'] ?? 0);

    $resellerOptions = '';
    foreach ($resellers as $reseller) {
        $selected = $resellerId === (int)$reseller['id'] ? ' selected' : '';
        $resellerOptions .= '<option value="' . (int)$reseller['id'] . '"' . $selected . '>' . app_h($reseller['name']) . '</option>';
    }

    $rows = '';
    foreach ($prices as $price) {
        $key = ($price['tld'] ?? '') . '|' . ($price['action_code'] ?? 'create');

        $rows .= '
            <tr>
                <td>' . app_h($price['tld'] ?? '') . '</td>
                <td>' . app_h($price['action_code'] ?? '') . '</td>
                <td><input class="input" type="text" name="prices[' . app_h($key) . '][supplier_price_net]" value="' . app_h(number_format((float)($price['supplier_price_net'] ?? 0), 2, '.', '')) . '"></td>
                <td>
                    <select class="select" name="prices[' . app_h($key) . '][reseller_markup_type]">
                        ' . select_options_assoc(['fixed' => 'fixed', 'percent' => 'percent'], (string)($price['reseller_markup_type'] ?? 'fixed')) . '
                    </select>
                </td>
                <td><input class="input" type="text" name="prices[' . app_h($key) . '][reseller_markup_value]" value="' . app_h(number_format((float)($price['reseller_markup_value'] ?? 0), 2, '.', '')) . '"></td>
                <td><input class="input" type="text" name="prices[' . app_h($key) . '][reseller_price_net]" value="' . app_h(number_format((float)($price['reseller_price_net'] ?? 0), 2, '.', '')) . '"></td>
            </tr>
        ';
    }

    if ($rows === '') {
        $rows = '<tr><td colspan="6"><div class="empty-state">Noch keine Preise vorhanden.</div></td></tr>';
    }

    return app_layout($app, [
        'title' => 'Preisliste',
        'content' => '
            <div class="page-wrap">
                <div class="page-head">
                    <div>
                        <h1 class="page-title">Preisliste</h1>
                        <p class="page-text">Providerpreise und Reseller-Margen pro TLD verwalten.</p>
                    </div>
                </div>

                ' . ((($app['user']['role'] ?? '') === 'admin') ? '
                <div class="card" style="margin-bottom:18px;">
                    <div class="card-body">
                        <form method="get" action="/price-list" class="stack">
                            <div class="form-field">
                                <label class="form-label">Reseller</label>
                                <select class="select" name="reseller_id" data-auto-submit>
                                    ' . $resellerOptions . '
                                </select>
                            </div>
                        </form>
                    </div>
                </div>
                ' : '') . '

                <div class="page-actions" style="margin-bottom:18px;">
                    <form method="post" action="/price-list/sync">
                        <input type="hidden" name="_token" value="' . app_h($app['csrf']) . '">
                        <input type="hidden" name="reseller_id" value="' . $resellerId . '">
                        <button class="btn btn-secondary" type="submit">Providerpreise synchronisieren</button>
                    </form>
                </div>

                <form method="post" action="/price-list/update">
                    <input type="hidden" name="_token" value="' . app_h($app['csrf']) . '">
                    <input type="hidden" name="reseller_id" value="' . $resellerId . '">

                    <div class="card">
                        <div class="card-body table-wrap">
                            <table class="table">
                                <thead>
                                    <tr>
                                        <th>TLD</th>
                                        <th>Aktion</th>
                                        <th>Provider netto</th>
                                        <th>Markup Typ</th>
                                        <th>Markup Wert</th>
                                        <th>Reseller netto</th>
                                    </tr>
                                </thead>
                                <tbody>' . $rows . '</tbody>
                            </table>
                        </div>
                    </div>

                    <div style="margin-top:18px;">
                        <button class="btn btn-primary" type="submit">Preise speichern</button>
                    </div>
                </form>
            </div>
        ',
    ]);
}

function view_billing_index(array $app, array $data): string
{
    $resellers = $data['resellers'] ?? [];
    $runs = $data['runs'] ?? [];
    $selectedResellerId = (int)($data['selected_reseller_id'] ?? 0);
    $selectedYear = (int)($data['selected_year'] ?? date('Y'));
    $selectedMonth = (int)($data['selected_month'] ?? date('n'));

    $resellerOptions = '<option value="0">Alle Reseller</option>';
    foreach ($resellers as $reseller) {
        $selected = $selectedResellerId === (int)$reseller['id'] ? ' selected' : '';
        $resellerOptions .= '<option value="' . (int)$reseller['id'] . '"' . $selected . '>' . app_h($reseller['name']) . '</option>';
    }

    $runRows = '';
    foreach ($runs as $run) {
        $runRows .= '
            <tr>
                <td><strong>' . app_h($run['reseller_name']) . '</strong></td>
                <td>' . app_h((string)$run['billing_month']) . '/' . app_h((string)$run['billing_year']) . '</td>
                <td>' . app_currency((float)$run['total_net']) . '</td>
                <td>' . app_currency((float)$run['total_gross']) . '</td>
                <td><span class="badge badge-neutral">' . app_h($run['status']) . '</span></td>
                <td><a class="btn btn-secondary btn-sm" href="/billing/show?id=' . (int)$run['id'] . '">Öffnen</a></td>
            </tr>
        ';
    }

    if ($runRows === '') {
        $runRows = '<tr><td colspan="6"><div class="empty-state">Keine Abrechnungsläufe gefunden.</div></td></tr>';
    }

    return app_layout($app, [
        'title' => 'Buchhaltung',
        'content' => '
            <div class="page-wrap">
                <div class="page-head">
                    <div>
                        <h1 class="page-title">Buchhaltung</h1>
                        <p class="page-text">Abrechnungsläufe je Reseller verwalten.</p>
                    </div>
                </div>

                <div class="grid grid-2" style="margin-bottom:18px;">
                    <div class="card">
                        <div class="card-header"><h2 class="card-title">Filtern</h2></div>
                        <div class="card-body">
                            <form method="get" action="/billing" class="form-grid">
                                <div class="col-6 form-field">
                                    <label class="form-label">Reseller</label>
                                    <select class="select" name="reseller_id">' . $resellerOptions . '</select>
                                </div>
                                <div class="col-3 form-field">
                                    <label class="form-label">Jahr</label>
                                    <input class="input" type="number" name="year" value="' . $selectedYear . '">
                                </div>
                                <div class="col-3 form-field">
                                    <label class="form-label">Monat</label>
                                    <input class="input" type="number" name="month" value="' . $selectedMonth . '">
                                </div>
                                <div class="col-12">
                                    <button class="btn btn-secondary" type="submit">Anzeigen</button>
                                </div>
                            </form>
                        </div>
                    </div>

                    <div class="card">
                        <div class="card-header"><h2 class="card-title">Abrechnungslauf erstellen</h2></div>
                        <div class="card-body">
                            <form method="post" action="/billing/create-run" class="form-grid">
                                <input type="hidden" name="_token" value="' . app_h($app['csrf']) . '">

                                <div class="col-6 form-field">
                                    <label class="form-label">Reseller</label>
                                    <select class="select" name="reseller_id" required>' . $resellerOptions . '</select>
                                </div>
                                <div class="col-3 form-field">
                                    <label class="form-label">Jahr</label>
                                    <input class="input" type="number" name="billing_year" value="' . $selectedYear . '" required>
                                </div>
                                <div class="col-3 form-field">
                                    <label class="form-label">Monat</label>
                                    <input class="input" type="number" name="billing_month" value="' . $selectedMonth . '" required>
                                </div>
                                <div class="col-12">
                                    <button class="btn btn-primary" type="submit">Lauf erstellen</button>
                                </div>
                            </form>
                        </div>
                    </div>
                </div>

                <div class="card">
                    <div class="card-header"><h2 class="card-title">Abrechnungsläufe</h2></div>
                    <div class="card-body table-wrap">
                        <table class="table">
                            <thead>
                                <tr>
                                    <th>Reseller</th>
                                    <th>Monat</th>
                                    <th>Netto</th>
                                    <th>Brutto</th>
                                    <th>Status</th>
                                    <th></th>
                                </tr>
                            </thead>
                            <tbody>' . $runRows . '</tbody>
                        </table>
                    </div>
                </div>
            </div>
        ',
    ]);
}

function view_billing_show(array $app, array $data): string
{
    $run = $data['run'];
    $customers = $data['customers'] ?? [];

    $rows = '';
    foreach ($customers as $customer) {
        $rows .= '
            <tr>
                <td><strong>' . app_h($customer['customer_name'] ?? 'Ohne Kunde') . '</strong></td>
                <td>' . app_h((string)($customer['domain_count'] ?? 0)) . '</td>
                <td>' . app_currency((float)$customer['total_net']) . '</td>
                <td>' . app_currency((float)$customer['total_gross']) . '</td>
                <td><a class="btn btn-secondary btn-sm" href="/billing/customer?run_id=' . (int)$run['id'] . '&customer_id=' . (int)$customer['customer_id'] . '">Details</a></td>
            </tr>
        ';
    }

    if ($rows === '') {
        $rows = '<tr><td colspan="5"><div class="empty-state">Keine Kundenpositionen vorhanden.</div></td></tr>';
    }

    return app_layout($app, [
        'title' => 'Abrechnung',
        'content' => '
            <div class="page-wrap">
                <div class="page-head">
                    <div>
                        <h1 class="page-title">' . app_h($run['reseller_name']) . '</h1>
                        <p class="page-text">Abrechnung ' . app_h((string)$run['billing_month']) . '/' . app_h((string)$run['billing_year']) . '</p>
                    </div>
                </div>

                <div class="grid grid-4" style="margin-bottom:18px;">
                    ' . dashboard_stat_card('Netto', app_currency((float)$run['total_net']), 'Summe netto', icon_price()) . '
                    ' . dashboard_stat_card('MwSt', app_currency((float)$run['total_vat']), 'Steuer', icon_receipt()) . '
                    ' . dashboard_stat_card('Brutto', app_currency((float)$run['total_gross']), 'Summe brutto', icon_receipt()) . '
                    ' . dashboard_stat_card('Status', app_h($run['status']), 'Laufstatus', icon_status()) . '
                </div>

                <div class="card" style="margin-bottom:18px;">
                    <div class="card-header"><h2 class="card-title">Metadaten</h2></div>
                    <div class="card-body">
                        <form method="post" action="/billing/update-run" class="form-grid">
                            <input type="hidden" name="_token" value="' . app_h($app['csrf']) . '">
                            <input type="hidden" name="run_id" value="' . (int)$run['id'] . '">

                            <div class="col-4 form-field">
                                <label class="form-label">Status</label>
                                <select class="select" name="status">' . billing_status_options((string)$run['status']) . '</select>
                            </div>

                            <div class="col-4 form-field">
                                <label class="form-label">Referenznummer</label>
                                <input class="input" type="text" name="reference_number" value="' . app_h($run['reference_number'] ?? '') . '">
                            </div>

                            <div class="col-12 form-field">
                                <label class="form-label">Notizen</label>
                                <textarea class="textarea" name="notes">' . app_h($run['notes'] ?? '') . '</textarea>
                            </div>

                            <div class="col-12">
                                <button class="btn btn-primary" type="submit">Speichern</button>
                            </div>
                        </form>
                    </div>
                </div>

                <div class="card">
                    <div class="card-header"><h2 class="card-title">Kundenpositionen</h2></div>
                    <div class="card-body table-wrap">
                        <table class="table">
                            <thead>
                                <tr>
                                    <th>Kunde</th>
                                    <th>Domains</th>
                                    <th>Netto</th>
                                    <th>Brutto</th>
                                    <th></th>
                                </tr>
                            </thead>
                            <tbody>' . $rows . '</tbody>
                        </table>
                    </div>
                </div>
            </div>
        ',
    ]);
}

function view_billing_customer_show(array $app, array $data): string
{
    $run = $data['run'];
    $positions = $data['positions'] ?? [];

    $customerName = $positions[0]['customer_name'] ?? 'Kunde';
    $rows = '';
    foreach ($positions as $position) {
        $rows .= '
            <tr>
                <td>' . app_h($position['domain_name'] ?? '') . '</td>
                <td>' . app_h($position['line_type'] ?? '') . '</td>
                <td>' . app_h((string)($position['quantity'] ?? 0)) . '</td>
                <td>' . app_currency((float)($position['line_net'] ?? 0)) . '</td>
                <td>' . app_currency((float)($position['line_gross'] ?? 0)) . '</td>
            </tr>
        ';
    }

    if ($rows === '') {
        $rows = '<tr><td colspan="5"><div class="empty-state">Keine Detailpositionen vorhanden.</div></td></tr>';
    }

    return app_layout($app, [
        'title' => 'Abrechnungsdetails',
        'content' => '
            <div class="page-wrap">
                <div class="page-head">
                    <div>
                        <h1 class="page-title">' . app_h($customerName) . '</h1>
                        <p class="page-text">Details zur Abrechnung ' . app_h((string)$run['billing_month']) . '/' . app_h((string)$run['billing_year']) . '</p>
                    </div>
                    <div class="page-actions">
                        <a class="btn btn-secondary" href="/billing/show?id=' . (int)$run['id'] . '">Zurück</a>
                    </div>
                </div>

                <div class="card">
                    <div class="card-header"><h2 class="card-title">Detailpositionen</h2></div>
                    <div class="card-body table-wrap">
                        <table class="table">
                            <thead>
                                <tr>
                                    <th>Domain</th>
                                    <th>Typ</th>
                                    <th>Menge</th>
                                    <th>Netto</th>
                                    <th>Brutto</th>
                                </tr>
                            </thead>
                            <tbody>' . $rows . '</tbody>
                        </table>
                    </div>
                </div>
            </div>
        ',
    ]);
}

function view_reseller_billing_index(array $app, array $data): string
{
    $runs = $data['runs'] ?? [];
    $domains = $data['domains'] ?? [];

    $runRows = '';
    foreach ($runs as $run) {
        $runRows .= '
            <tr>
                <td>' . app_h((string)$run['billing_month']) . '/' . app_h((string)$run['billing_year']) . '</td>
                <td>' . app_currency((float)$run['total_net']) . '</td>
                <td>' . app_currency((float)$run['total_gross']) . '</td>
                <td><span class="badge badge-neutral">' . app_h($run['status']) . '</span></td>
                <td><a class="btn btn-secondary btn-sm" href="/reseller/billing/show?id=' . (int)$run['id'] . '">Öffnen</a></td>
            </tr>
        ';
    }

    if ($runRows === '') {
        $runRows = '<tr><td colspan="5"><div class="empty-state">Keine Abrechnungen vorhanden.</div></td></tr>';
    }

    $domainRows = '';
    foreach ($domains as $domain) {
        $domainRows .= '
            <tr>
                <td><strong>' . app_h($domain['domain_name'] ?? '') . '</strong></td>
                <td>' . app_h($domain['customer_name'] ?? '') . '</td>
                <td>' . app_currency((float)($domain['reseller_price_net'] ?? 0)) . '</td>
                <td>' . app_h($domain['local_status'] ?? '') . '</td>
            </tr>
        ';
    }

    if ($domainRows === '') {
        $domainRows = '<tr><td colspan="4"><div class="empty-state">Keine Domains vorhanden.</div></td></tr>';
    }

    return app_layout($app, [
        'title' => 'Buchhaltung',
        'content' => '
            <div class="page-wrap">
                <div class="page-head">
                    <div>
                        <h1 class="page-title">Buchhaltung</h1>
                        <p class="page-text">Deine Abrechnungen und aktueller Domainbestand.</p>
                    </div>
                </div>

                <div class="grid grid-2">
                    <div class="card">
                        <div class="card-header"><h2 class="card-title">Abrechnungen</h2></div>
                        <div class="card-body table-wrap">
                            <table class="table">
                                <thead>
                                    <tr>
                                        <th>Monat</th>
                                        <th>Netto</th>
                                        <th>Brutto</th>
                                        <th>Status</th>
                                        <th></th>
                                    </tr>
                                </thead>
                                <tbody>' . $runRows . '</tbody>
                            </table>
                        </div>
                    </div>

                    <div class="card">
                        <div class="card-header"><h2 class="card-title">Aktueller Bestand</h2></div>
                        <div class="card-body table-wrap">
                            <table class="table">
                                <thead>
                                    <tr>
                                        <th>Domain</th>
                                        <th>Kunde</th>
                                        <th>Preis netto</th>
                                        <th>Status</th>
                                    </tr>
                                </thead>
                                <tbody>' . $domainRows . '</tbody>
                            </table>
                        </div>
                    </div>
                </div>
            </div>
        ',
    ]);
}

function view_reseller_billing_show(array $app, array $data): string
{
    return view_billing_show($app, $data);
}

function view_reseller_billing_customer_show(array $app, array $data): string
{
    return view_billing_customer_show($app, $data);
}

function view_account_index(array $app, array $data = []): string
{
    $user = $app['user'];
    $error = $data['error'] ?? '';

    return app_layout($app, [
        'title' => 'Konto',
        'content' => '
            <div class="page-wrap" style="max-width:900px;">
                <div class="page-head">
                    <div>
                        <h1 class="page-title">Konto</h1>
                        <p class="page-text">Passwort und Basisdaten.</p>
                    </div>
                </div>

                <div class="grid grid-2">
                    <div class="card">
                        <div class="card-header"><h2 class="card-title">Profil</h2></div>
                        <div class="card-body">
                            <div class="kv">
                                <div class="kv-key">Name</div>
                                <div class="kv-value">' . app_h($user['display_name'] ?? '') . '</div>
                                <div class="kv-key">E-Mail</div>
                                <div class="kv-value">' . app_h($user['email'] ?? '') . '</div>
                                <div class="kv-key">Rolle</div>
                                <div class="kv-value">' . app_h(role_label($app, $user['role'] ?? '')) . '</div>
                            </div>
                        </div>
                    </div>

                    <div class="card">
                        <div class="card-header"><h2 class="card-title">Passwort ändern</h2></div>
                        <div class="card-body">
                            ' . ($error ? '<div class="alert alert-danger" style="margin-bottom:14px;"><div>' . app_h($error) . '</div></div>' : '') . '

                            <form method="post" action="/account/password" class="stack">
                                <input type="hidden" name="_token" value="' . app_h($app['csrf']) . '">

                                <div class="form-field">
                                    <label class="form-label">Aktuelles Passwort</label>
                                    <input class="input" type="password" name="current_password" required>
                                </div>

                                <div class="form-field">
                                    <label class="form-label">Neues Passwort</label>
                                    <input class="input" id="new_password_account" type="password" name="new_password" required>
                                </div>

                                <div class="form-field">
                                    <label class="form-label">Neues Passwort wiederholen</label>
                                    <input class="input" type="password" name="confirm_password" data-must-match="new_password_account" required>
                                </div>

                                <button class="btn btn-primary" type="submit">Passwort speichern</button>
                            </form>
                        </div>
                    </div>
                </div>
            </div>
        ',
    ]);
}

/* -------------------- Helpers -------------------- */

function dashboard_stat_card(string $label, string $value, string $meta, string $icon, bool $raw = false, string $overrideValue = ''): string
{
    $valueHtml = $raw ? $overrideValue : app_h($value);

    return '
        <div class="card stat-card">
            <div class="stat-row">
                <div>
                    <div class="stat-label">' . app_h($label) . '</div>
                    <div class="stat-value">' . $valueHtml . '</div>
                </div>
                <div class="stat-icon">' . $icon . '</div>
            </div>
            <div class="stat-meta">' . app_h($meta) . '</div>
        </div>
    ';
}

function dashboard_customers_card(array $app, array $customers): string
{
    $rows = '';
    $isAdmin = ($app['user']['role'] ?? '') === 'admin';

    foreach (array_slice($customers, 0, 6) as $customer) {
        $rows .= '
            <tr>
                <td>
                    <strong>' . app_h($customer['name'] ?? '') . '</strong>
                    <span class="sub">' . app_h($customer['email'] ?? '') . '</span>
                </td>
                ' . ($isAdmin ? '<td>' . app_h($customer['reseller_name'] ?? '') . '</td>' : '') . '
            </tr>
        ';
    }

    if ($rows === '') {
        $rows = '<tr><td colspan="' . ($isAdmin ? '2' : '1') . '"><div class="empty-state">Keine Kunden vorhanden.</div></td></tr>';
    }

    return '
        <div class="card">
            <div class="card-header"><h2 class="card-title">Letzte Kunden</h2></div>
            <div class="card-body table-wrap">
                <table class="table">
                    <thead><tr><th>Kunde</th>' . ($isAdmin ? '<th>Reseller</th>' : '') . '</tr></thead>
                    <tbody>' . $rows . '</tbody>
                </table>
            </div>
        </div>
    ';
}

function dashboard_domains_card(array $app, array $domains): string
{
    $rows = '';
    $isAdmin = ($app['user']['role'] ?? '') === 'admin';

    foreach (array_slice($domains, 0, 6) as $domain) {
        $rows .= '
            <tr>
                <td>
                    <strong>' . app_h($domain['domain_name'] ?? '') . '</strong>
                    <span class="sub">' . app_h($domain['provider_status'] ?? '') . '</span>
                </td>
                <td>' . app_h($domain['customer_name'] ?? '') . '</td>
                ' . ($isAdmin ? '<td>' . app_h($domain['reseller_name'] ?? '') . '</td>' : '') . '
            </tr>
        ';
    }

    if ($rows === '') {
        $rows = '<tr><td colspan="' . ($isAdmin ? '3' : '2') . '"><div class="empty-state">Keine Domains vorhanden.</div></td></tr>';
    }

    return '
        <div class="card">
            <div class="card-header"><h2 class="card-title">Letzte Domains</h2></div>
            <div class="card-body table-wrap">
                <table class="table">
                    <thead><tr><th>Domain</th><th>Kunde</th>' . ($isAdmin ? '<th>Reseller</th>' : '') . '</tr></thead>
                    <tbody>' . $rows . '</tbody>
                </table>
            </div>
        </div>
    ';
}

function billing_status_options(string $current): string
{
    $items = ['open', 'reviewed', 'exported', 'closed'];
    $html = '';

    foreach ($items as $item) {
        $selected = $current === $item ? ' selected' : '';
        $html .= '<option value="' . app_h($item) . '"' . $selected . '>' . app_h($item) . '</option>';
    }

    return $html;
}

function role_label(array $app, string $role): string
{
    return $app['config']['roles'][$role] ?? ucfirst($role);
}

function select_options_assoc(array $items, string $current): string
{
    $html = '';
    foreach ($items as $value => $label) {
        $html .= '<option value="' . app_h((string)$value) . '"' . ($current === (string)$value ? ' selected' : '') . '>' . app_h((string)$label) . '</option>';
    }
    return $html;
}

function select_options_simple(array $items, string $current): string
{
    $assoc = [];
    foreach ($items as $item) {
        $assoc[(string)$item] = (string)$item;
    }
    return select_options_assoc($assoc, $current);
}

/* -------------------- Icons -------------------- */

function icon_wrap(string $path): string
{
    return '<svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">' . $path . '</svg>';
}

function icon_home(): string { return icon_wrap('<path d="M3 10.5 12 3l9 7.5"/><path d="M5 9.5V21h14V9.5"/>'); }
function icon_users(): string { return icon_wrap('<path d="M16 21v-2a4 4 0 0 0-4-4H6a4 4 0 0 0-4 4v2"/><circle cx="9" cy="7" r="4"/><path d="M22 21v-2a4 4 0 0 0-3-3.87"/><path d="M16 3.13a4 4 0 0 1 0 7.75"/>'); }
function icon_user_card(): string { return icon_wrap('<rect x="3" y="5" width="18" height="14" rx="2"/><circle cx="9" cy="10" r="2.5"/><path d="M6.5 15a3.5 3.5 0 0 1 5 0"/><path d="M14 9h4"/><path d="M14 13h4"/>'); }
function icon_settings(): string { return icon_wrap('<path d="M12 2v3"/><path d="M12 19v3"/><path d="m4.93 4.93 2.12 2.12"/><path d="m16.95 16.95 2.12 2.12"/><path d="M2 12h3"/><path d="M19 12h3"/><path d="m4.93 19.07 2.12-2.12"/><path d="m16.95 7.05 2.12-2.12"/><circle cx="12" cy="12" r="4"/>'); }
function icon_status(): string { return icon_wrap('<circle cx="12" cy="12" r="9"/><path d="m9 12 2 2 4-4"/>'); }
function icon_search(): string { return icon_wrap('<circle cx="11" cy="11" r="7"/><path d="m21 21-4.35-4.35"/>'); }
function icon_menu(): string { return icon_wrap('<path d="M4 7h16"/><path d="M4 12h16"/><path d="M4 17h16"/>'); }
function icon_price(): string { return icon_wrap('<path d="M12 1v22"/><path d="M17 5H9.5a3.5 3.5 0 0 0 0 7H14.5a3.5 3.5 0 0 1 0 7H6"/>'); }
function icon_receipt(): string { return icon_wrap('<path d="M6 3h12v18l-3-2-3 2-3-2-3 2V3z"/><path d="M9 8h6"/><path d="M9 12h6"/><path d="M9 16h4"/>'); }
function icon_domain(): string { return icon_wrap('<circle cx="12" cy="12" r="9"/><path d="M3 12h18"/><path d="M12 3a15 15 0 0 1 0 18"/><path d="M12 3a15 15 0 0 0 0 18"/>'); }
function icon_contact(): string { return icon_wrap('<path d="M5 4h14a2 2 0 0 1 2 2v12a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2z"/><path d="M8 9h8"/><path d="M8 13h5"/><circle cx="8" cy="17" r="1"/>'); }<br />
<b>Warning</b>:  http_response_code(): Cannot set response code - headers already sent (output started at /var/www/vhosts/domains.myhostpanel.de/httpdocs/views.php:1) in <b>/var/www/vhosts/domains.myhostpanel.de/httpdocs/app.php</b> on line <b>301</b><br />
<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function app_layout() in /var/www/vhosts/domains.myhostpanel.de/httpdocs/app.php:305
Stack trace:
#0 /var/www/vhosts/domains.myhostpanel.de/httpdocs/app.php(120): app_error_page()
#1 /var/www/vhosts/domains.myhostpanel.de/httpdocs/index.php(17): app_handle_request()
#2 {main}
  thrown in <b>/var/www/vhosts/domains.myhostpanel.de/httpdocs/app.php</b> on line <b>305</b><br />