nexus/partials/landingpages/users/settings.php

<?php
$themes = [
    'light' => 'Light',
    'ocean' => 'Ocean',
    'graphite' => 'Graphite',
];

require_auth();

$current = user_theme();
$timezoneOptions = modules()->timezones();
$nexusSettings = nexus_settings();
$isAdmin = auth_is_admin();
$notice = null;

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $settingsSection = trim((string) ($_POST['settings_section'] ?? 'theme'));
    if ($settingsSection === 'nexus' && $isAdmin) {
        $displayTimezoneCustom = isset($_POST['display_timezone_custom']) ? '1' : '0';
        $displayTimezone = trim((string) ($_POST['display_timezone'] ?? ''));
        $cronTimezone = trim((string) ($_POST['cron_timezone'] ?? ''));

        foreach (['displayTimezone' => $displayTimezone, 'cronTimezone' => $cronTimezone] as $key => $value) {
            if ($value !== '') {
                try {
                    new DateTimeZone($value);
                } catch (\Throwable) {
                    $$key = '';
                }
            }
        }

        $nexusSettings['display_timezone_custom'] = $displayTimezoneCustom;
        $nexusSettings['display_timezone'] = $displayTimezoneCustom === '1' ? $displayTimezone : '';
        $nexusSettings['cron_timezone'] = $cronTimezone;
        nexus_save_settings($nexusSettings);
        $nexusSettings = nexus_settings();
        $notice = 'Nexus-Einstellungen gespeichert.';
    } else {
        $theme = (string)($_POST['theme'] ?? 'light');
        if (!isset($themes[$theme])) {
            $theme = 'light';
        }
        set_user_theme($theme);
        $current = $theme;
        $notice = 'Theme gespeichert.';
    }
}

$systemTimezone = nexus_system_timezone_name();
$effectiveDisplayTimezone = nexus_display_timezone_name();
$effectiveCronTimezone = nexus_cron_timezone_name();
$displayTimezoneCustom = !empty($nexusSettings['display_timezone_custom']);
$savedDisplayTimezone = trim((string) ($nexusSettings['display_timezone'] ?? ''));
$savedCronTimezone = trim((string) ($nexusSettings['cron_timezone'] ?? ''));
?>
<div class="module-shell"><div class="module-page-bg"><div class="module-page-stack">
  <section class="section-box">
    <h1>Nexus Einstellungen</h1>
    <p class="muted">Persönliche Anzeige und systemweite Standardwerte.</p>

    <?php if ($notice): ?>
      <div class="section-box" style="margin-top:1rem; border-color:var(--accent-2);">
        <?= e($notice) ?>
      </div>
    <?php endif; ?>

    <div class="setup-form" style="margin-top:1rem;">
      <section class="section-box setup-panel">
        <div class="setup-panel__head">
          <div>
            <span class="pill">Benutzer</span>
            <h2>Persönliches Design</h2>
          </div>
        </div>
        <form method="post" class="setup-form">
          <input type="hidden" name="settings_section" value="theme">
          <div class="setup-grid">
            <label class="setup-field muted">
              <span>Farbpalette</span>
              <select name="theme">
                <?php foreach ($themes as $key => $label): ?>
                  <option value="<?= e($key) ?>" <?= $current === $key ? 'selected' : '' ?>>
                    <?= e($label) ?>
                  </option>
                <?php endforeach; ?>
              </select>
            </label>
          </div>
          <div class="setup-actions setup-actions--footer">
            <button class="cta-button" type="submit">Design speichern</button>
          </div>
        </form>
      </section>

      <?php if ($isAdmin): ?>
        <section class="section-box setup-panel">
          <div class="setup-panel__head">
            <div>
              <span class="pill">Nexus</span>
              <h2>Standard-Zeitzonen</h2>
              <p class="muted">Diese Werte werden von Modulen als Default übernommen, sofern dort kein eigener Override gesetzt ist.</p>
            </div>
          </div>
          <form method="post" class="setup-form">
            <input type="hidden" name="settings_section" value="nexus">
            <datalist id="nexus-timezone-options">
              <?php foreach ($timezoneOptions as $timezoneOption): ?>
                <option value="<?= e((string) $timezoneOption['value']) ?>"><?= e((string) $timezoneOption['label']) ?></option>
              <?php endforeach; ?>
            </datalist>
            <div class="setup-grid">
              <div class="setup-field muted">
                <span>System-Zeitzone</span>
                <div><?= e($systemTimezone) ?></div>
                <small class="muted">Diese Zeitzone wird genutzt, wenn keine globale Anzeige-Zeitzone gesetzt ist.</small>
              </div>
              <div class="setup-field muted">
                <span>Anzeige-Zeitzone</span>
                <label style="display:flex; align-items:center; gap:10px;">
                  <input type="checkbox" name="display_timezone_custom" value="1" <?= $displayTimezoneCustom ? 'checked' : '' ?> data-global-display-tz-toggle>
                  <span>Custom-Zeitzone verwenden</span>
                </label>
                <div class="setup-db-message setup-db-message--hint">Aktiv: <?= e($effectiveDisplayTimezone) ?></div>
              </div>
            </div>
            <div class="setup-grid" data-global-display-tz-panel <?= $displayTimezoneCustom ? '' : 'hidden' ?>>
              <label class="setup-field muted">
                <span>Custom Anzeige-Zeitzone</span>
                <input type="text" name="display_timezone" value="<?= e($savedDisplayTimezone !== '' ? $savedDisplayTimezone : $effectiveDisplayTimezone) ?>" list="nexus-timezone-options" autocomplete="off">
              </label>
            </div>
            <div class="setup-grid">
              <label class="setup-field muted">
                <span>Standard-Zeitzone für Crons</span>
                <input type="text" name="cron_timezone" value="<?= e($savedCronTimezone !== '' ? $savedCronTimezone : $effectiveCronTimezone) ?>" list="nexus-timezone-options" autocomplete="off">
                <small class="muted">Wird in Modul-Crons als Standard verwendet. Einzelne Module oder Einträge können das übersteuern.</small>
              </label>
            </div>
            <div class="setup-actions setup-actions--footer">
              <button class="cta-button" type="submit">Nexus-Einstellungen speichern</button>
            </div>
          </form>
        </section>
      <?php endif; ?>
    </div>
  </section>
</div></div></div>
<?php if ($isAdmin): ?>
  <script>
    (() => {
      const toggle = document.querySelector('[data-global-display-tz-toggle]');
      const panel = document.querySelector('[data-global-display-tz-panel]');
      if (!toggle || !panel) return;
      const sync = () => {
        panel.hidden = !toggle.checked;
      };
      toggle.addEventListener('change', sync);
      sync();
    })();
  </script>
<?php endif; ?>