// 👉 Shortcode zur Anzeige der Wetterdaten
add_shortcode('wetter_verlauf', function () {
    global $wpdb;
    $table = $wpdb->prefix . 'weather_log';

    $results = $wpdb->get_results("SELECT * FROM $table ORDER BY date DESC LIMIT 30");

    if (!$results) {
        return "Keine Wetterdaten vorhanden.";
    }

    $output = '<table border="1" style="border-collapse: collapse; width: 100%;">';
    $output .= '<tr>
        <th>Datum</th>
        <th>Temperatur (°C)</th>
        <th>Luftfeuchte (%)</th>
        <th>Beschreibung</th>
    </tr>';

    foreach ($results as $row) {
        $output .= '<tr>';
        $output .= '<td>' . esc_html($row->date) . '</td>';
        $output .= '<td>' . esc_html($row->temperature) . '</td>';
        $output .= '<td>' . esc_html($row->humidity) . '</td>';
        $output .= '<td>' . esc_html($row->description) . '</td>';
        $output .= '</tr>';
    }

    $output .= '</table>';

    return $output;
});