Merge pull request #40 from Terranom674/fix/09718-restore-pre-ui-behavior

0.9.7.18: konsistente Kernfunktionen und einheitliche NC-UI wiederherstellen
Restore single-path NC admin UI
2026-09-19 22:14:33 +00:00 · 2026-08-20 00:02:17 +02:00 · 2026-08-19 23:59:56 +02:00 · 2026-08-19 23:58:13 +02:00 · 2026-08-19 23:57:24 +02:00 · 2026-08-19 23:55:04 +02:00
31 changed files with 1548 additions and 1584 deletions
--- a/.ci-trigger-0977
+++ b/.ci-trigger-0977
@@ -0,0 +1 @@
+0.9.7.7
--- a/include/nc_connector_delete_safe.inc.php
+++ b/include/nc_connector_delete_safe.inc.php
@@ -4,42 +4,84 @@ if (!defined('PHPWG_ROOT_PATH'))
  die('Hacking attempt!');
 }

-function bratonien_tools_nc_connector_webdav_site_id(array $connection)
+function bratonien_tools_nc_connector_db_prefix_from_absolute($path)
 {
-  $config = isset($connection['config']) && is_array($connection['config']) ? $connection['config'] : array();
-  if ((string)($connection['adapter'] ?? '') !== 'remote') return 0;
-  if ((string)($config['source_mode'] ?? '') !== 'webdav-placeholder') return 0;
+  $path = rtrim(str_replace('\\', '/', (string)$path), '/');
+  $piwigo_root = rtrim(str_replace('\\', '/', PHPWG_ROOT_PATH), '/');
+  if ($path === '' || strpos($path, $piwigo_root.'/') !== 0) return '';

-  $gallery_root = rtrim((string)($config['parallel_gallery_root'] ?? ''), '/');
-  $piwigo_root = rtrim(PHPWG_ROOT_PATH, '/');
-  if ($gallery_root === '' || strpos($gallery_root, $piwigo_root.'/') !== 0) return 0;
+  $relative = ltrim(substr($path, strlen($piwigo_root)), '/');
+  return $relative === '' ? '' : './'.rtrim($relative, '/').'/';
+}

-  $relative = ltrim(substr($gallery_root, strlen($piwigo_root)), '/');
-  if ($relative === '') return 0;
-  $site_url = './'.rtrim($relative, '/').'/';
+function bratonien_tools_nc_connector_owned_db_prefixes(array $connection)
+{
+  $id = (int)($connection['id'] ?? 0);
+  if ($id < 1) return array();

-  $result = pwg_query(
-    "SELECT id FROM ".SITES_TABLE.
-    " WHERE galleries_url='".pwg_db_real_escape_string($site_url)."' LIMIT 1"
+  $prefixes = array(
+    './_data/bratonien-tools/nc-webdav-gallery/connection-'.$id.'/',
+    './_data/bratonien-tools/nc-webdav-source/connection-'.$id.'/',
+    './galleries/bratonien-webdav-'.$id.'/',
  );
-  if (!pwg_db_num_rows($result)) return 0;

-  $row = pwg_db_fetch_assoc($result);
-  return (int)$row['id'];
+  $config = isset($connection['config']) && is_array($connection['config']) ? $connection['config'] : array();
+  $configured = bratonien_tools_nc_connector_db_prefix_from_absolute($config['parallel_gallery_root'] ?? '');
+  if ($configured !== '') $prefixes[] = $configured;
+
+  return array_values(array_unique($prefixes));
+}
+
+function bratonien_tools_nc_connector_owned_site_urls(array $connection)
+{
+  $id = (int)($connection['id'] ?? 0);
+  if ($id < 1) return array();
+
+  $urls = array(
+    './_data/bratonien-tools/nc-webdav-gallery/connection-'.$id.'/',
+    './galleries/bratonien-webdav-'.$id.'/',
+  );
+
+  $config = isset($connection['config']) && is_array($connection['config']) ? $connection['config'] : array();
+  $configured = bratonien_tools_nc_connector_db_prefix_from_absolute($config['parallel_gallery_root'] ?? '');
+  if ($configured !== '') $urls[] = $configured;
+
+  return array_values(array_unique($urls));
 }

 function bratonien_tools_nc_connector_remove_webdav_piwigo_content(array $connection)
 {
-  $site_id = bratonien_tools_nc_connector_webdav_site_id($connection);
-  if ($site_id < 1) return array('site_id'=>0, 'images'=>0);
-
  include_once(PHPWG_ROOT_PATH.'admin/include/functions.php');

+  $prefixes = bratonien_tools_nc_connector_owned_db_prefixes($connection);
+  if (!$prefixes) return array('sites'=>0, 'images'=>0);
+
+  $where = array();
+  foreach ($prefixes as $prefix)
+  {
+    $escaped = pwg_db_real_escape_string(addcslashes($prefix, '_%\\'));
+    $where[] = "path LIKE '".$escaped."%' ESCAPE '\\\\'";
+  }
+
  $image_rows = array();
-  $query = '\nSELECT DISTINCT i.id, i.path, i.representative_ext\n  FROM '.IMAGES_TABLE.' AS i\n  LEFT JOIN '.CATEGORIES_TABLE.' AS sc ON sc.id = i.storage_category_id\n  LEFT JOIN '.IMAGE_CATEGORY_TABLE.' AS ic ON ic.image_id = i.id\n  LEFT JOIN '.CATEGORIES_TABLE.' AS vc ON vc.id = ic.category_id\n  WHERE sc.site_id = '.$site_id.' OR vc.site_id = '.$site_id.'\n;';
-  $result = pwg_query($query);
+  $result = pwg_query(
+    'SELECT id, path, representative_ext FROM '.IMAGES_TABLE.
+    ' WHERE '.implode(' OR ', $where)
+  );
  while ($row = pwg_db_fetch_assoc($result))
  {
+    $path = (string)$row['path'];
+    $owned = false;
+    foreach ($prefixes as $prefix)
+    {
+      if (strpos($path, $prefix) === 0)
+      {
+        $owned = true;
+        break;
+      }
+    }
+    if (!$owned) continue;
+
    $row['id'] = (int)$row['id'];
    $image_rows[$row['id']] = $row;
  }
@@ -56,24 +98,28 @@ function bratonien_tools_nc_connector_remove_webdav_piwigo_content(array $connec
    }
  }

-  delete_site($site_id);
-
  if ($image_rows)
  {
-    $ids = array_keys($image_rows);
-    $remaining = query2array(
-      'SELECT id FROM '.IMAGES_TABLE.' WHERE id IN ('.implode(',', array_map('intval', $ids)).')',
-      null,
-      'id'
+    delete_elements(array_map('intval', array_keys($image_rows)), false);
+  }
+
+  $site_count = 0;
+  foreach (bratonien_tools_nc_connector_owned_site_urls($connection) as $site_url)
+  {
+    $result = pwg_query(
+      "SELECT id FROM ".SITES_TABLE.
+      " WHERE galleries_url='".pwg_db_real_escape_string($site_url)."'"
    );
-    if ($remaining)
+    while ($row = pwg_db_fetch_assoc($result))
    {
-      delete_elements(array_map('intval', $remaining), false);
+      delete_site((int)$row['id']);
+      $site_count++;
    }
  }

+  update_category('all');
  invalidate_user_cache(true);
-  return array('site_id'=>$site_id, 'images'=>count($image_rows));
+  return array('sites'=>$site_count, 'images'=>count($image_rows));
 }

 /**
@@ -89,7 +135,7 @@ function bratonien_tools_nc_connector_delete_safe()
    throw new RuntimeException('Connector-Verbindung wurde nicht gefunden.');
  }

-  $cleanup = array('site_id'=>0, 'images'=>0);
+  $cleanup = array('sites'=>0, 'images'=>0);
  if (
    (string)($connection['adapter'] ?? '') === 'remote'
    && (string)($connection['config']['source_mode'] ?? '') === 'webdav-placeholder'
@@ -110,14 +156,7 @@ function bratonien_tools_nc_connector_delete_safe()
    @file_put_contents($status_dir.'/deleted-'.$id, date('c')."\n", LOCK_EX);
  }

-  if ((int)$cleanup['site_id'] > 0)
-  {
-    return array(
-      'message'=>'Verbindung wurde gelöscht. Die zugehörigen Piwigo-Alben und '.(int)$cleanup['images'].' Bilder wurden aus Piwigo entfernt. Nextcloud-Dateien blieben unverändert.',
-    );
-  }
-
  return array(
-    'message'=>'Verbindung wurde gelöscht. Verbliebene Laufzeitdaten werden automatisch bereinigt. Quelldateien blieben unverändert.',
+    'message'=>'Verbindung wurde gelöscht. '.(int)$cleanup['images'].' eindeutig zu dieser Verbindung gehörende Bilder wurden aus Piwigo entfernt. Nextcloud-Dateien blieben unverändert.',
  );
 }
--- a/include/nc_connector_scheduler.inc.php
+++ b/include/nc_connector_scheduler.inc.php
@@ -0,0 +1,210 @@
+<?php
+if (!defined('PHPWG_ROOT_PATH'))
+{
+  die('Hacking attempt!');
+}
+
+function bratonien_tools_nc_scheduler_paths()
+{
+  $base = rtrim(PHPWG_ROOT_PATH, '/').'/_data/bratonien-tools';
+  return array(
+    'base'=>$base,
+    'runtime'=>$base.'/nc-connector-runtime',
+    'state_root'=>$base.'/nc-connector-state',
+    'scheduler'=>$base.'/nc-connector-scheduler',
+    'state'=>$base.'/nc-connector-scheduler/state.json',
+    'trigger_lock'=>$base.'/nc-connector-scheduler/trigger.lock',
+    'worker_lock'=>$base.'/nc-connector-scheduler/worker.lock',
+    'log'=>$base.'/nc-connector-scheduler/last-worker.log',
+    'status_root'=>$base.'/nc-connector-status',
+  );
+}
+
+function bratonien_tools_nc_scheduler_interval()
+{
+  global $conf;
+  $interval = isset($conf['bratonien_nc_scheduler_interval']) ? (int)$conf['bratonien_nc_scheduler_interval'] : 60;
+  return max(60, $interval);
+}
+
+function bratonien_tools_nc_scheduler_ensure_dirs()
+{
+  foreach (bratonien_tools_nc_scheduler_paths() as $key=>$path)
+  {
+    if (in_array($key, array('state','trigger_lock','worker_lock','log'), true)) continue;
+    if (!is_dir($path) && !@mkdir($path, 0750, true) && !is_dir($path))
+    {
+      return false;
+    }
+  }
+  return true;
+}
+
+function bratonien_tools_nc_scheduler_read_state()
+{
+  $paths = bratonien_tools_nc_scheduler_paths();
+  if (!is_readable($paths['state'])) return array();
+  $decoded = json_decode((string)@file_get_contents($paths['state']), true);
+  return is_array($decoded) ? $decoded : array();
+}
+
+function bratonien_tools_nc_scheduler_write_state(array $state)
+{
+  $paths = bratonien_tools_nc_scheduler_paths();
+  if (!bratonien_tools_nc_scheduler_ensure_dirs()) return false;
+  $json = json_encode($state, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT);
+  if (!is_string($json)) return false;
+  $tmp = $paths['state'].'.tmp';
+  if (@file_put_contents($tmp, $json."\n", LOCK_EX) === false) return false;
+  @chmod($tmp, 0640);
+  return @rename($tmp, $paths['state']);
+}
+
+function bratonien_tools_nc_scheduler_write_connection_status($connection_id, $state, $message)
+{
+  $connection_id = (int)$connection_id;
+  if ($connection_id < 1) return false;
+  $paths = bratonien_tools_nc_scheduler_paths();
+  if (!bratonien_tools_nc_scheduler_ensure_dirs()) return false;
+  $target = $paths['status_root'].'/connection-'.$connection_id.'.json';
+  $existing = array();
+  if (is_readable($target))
+  {
+    $decoded = json_decode((string)@file_get_contents($target), true);
+    if (is_array($decoded)) $existing = $decoded;
+  }
+  $existing['state'] = (string)$state;
+  $existing['message'] = (string)$message;
+  $existing['timestamp'] = time();
+  $existing['connection_id'] = $connection_id;
+  $json = json_encode($existing, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT);
+  if (!is_string($json)) return false;
+  $tmp = $target.'.tmp';
+  if (@file_put_contents($tmp, $json."\n", LOCK_EX) === false) return false;
+  @chmod($tmp, 0644);
+  return @rename($tmp, $target);
+}
+
+function bratonien_tools_nc_scheduler_install()
+{
+  if (!bratonien_tools_nc_scheduler_ensure_dirs()) return false;
+  $state = bratonien_tools_nc_scheduler_read_state();
+  if (empty($state['next_due']))
+  {
+    $state['next_due'] = time();
+    $state['enabled'] = true;
+    $state['mode'] = 'piwigo-native';
+    bratonien_tools_nc_scheduler_write_state($state);
+  }
+  return true;
+}
+
+function bratonien_tools_nc_scheduler_php_binary()
+{
+  foreach (array('/usr/bin/php', '/usr/local/bin/php', PHP_BINARY) as $candidate)
+  {
+    if (is_string($candidate) && $candidate !== '' && is_executable($candidate)) return $candidate;
+  }
+  return '';
+}
+
+function bratonien_tools_nc_scheduler_spawn($force = false, $connection_id = 0)
+{
+  $connection_id = max(0, (int)$connection_id);
+  $paths = bratonien_tools_nc_scheduler_paths();
+  if (!bratonien_tools_nc_scheduler_ensure_dirs())
+  {
+    throw new RuntimeException('Der native NC-Scheduler kann sein Laufzeitverzeichnis nicht anlegen.');
+  }
+
+  $lock = @fopen($paths['trigger_lock'], 'c+');
+  if (!is_resource($lock) || !@flock($lock, LOCK_EX | LOCK_NB))
+  {
+    if (is_resource($lock)) fclose($lock);
+    return array('started'=>false, 'message'=>'Ein NC-Abgleich wird bereits vorbereitet.');
+  }
+
+  $state = bratonien_tools_nc_scheduler_read_state();
+  $now = time();
+  $next_due = (int)($state['next_due'] ?? 0);
+  if (!$force && $next_due > $now)
+  {
+    @flock($lock, LOCK_UN);
+    fclose($lock);
+    return array('started'=>false, 'message'=>'Der nächste NC-Abgleich ist noch nicht fällig.');
+  }
+
+  $php = bratonien_tools_nc_scheduler_php_binary();
+  if ($php === '')
+  {
+    @flock($lock, LOCK_UN);
+    fclose($lock);
+    throw new RuntimeException('Kein ausführbares PHP-CLI für den nativen NC-Scheduler gefunden.');
+  }
+
+  $state['enabled'] = true;
+  $state['mode'] = 'piwigo-native';
+  $state['state'] = 'queued';
+  $state['message'] = $connection_id > 0 ? 'NC-Abgleich für Verbindung #'.$connection_id.' wurde angefordert.' : 'NC-Abgleich für alle Verbindungen wurde angefordert.';
+  $state['queued_at'] = $now;
+  $state['timestamp'] = $now;
+  $state['connection_id'] = $connection_id;
+  $state['next_due'] = $now + bratonien_tools_nc_scheduler_interval();
+  bratonien_tools_nc_scheduler_write_state($state);
+  if ($connection_id > 0)
+  {
+    bratonien_tools_nc_scheduler_write_connection_status($connection_id, 'queued', 'Abgleich wurde angefordert.');
+  }
+
+  $runner = BRATONIEN_TOOLS_PATH.'runtime/native-runner.php';
+  $runner_args = $connection_id > 0 ? ' --connection-id='.escapeshellarg((string)$connection_id) : '';
+  $command = escapeshellarg($php).' '.escapeshellarg($runner).$runner_args.' >> '.escapeshellarg($paths['log']).' 2>&1 &';
+  $spec = array(
+    0=>array('file','/dev/null','r'),
+    1=>array('file','/dev/null','a'),
+    2=>array('file','/dev/null','a'),
+  );
+  $process = function_exists('proc_open') ? @proc_open(array('/bin/sh','-c',$command), $spec, $pipes) : false;
+  $exit = is_resource($process) ? proc_close($process) : 1;
+
+  @flock($lock, LOCK_UN);
+  fclose($lock);
+
+  if ($exit !== 0)
+  {
+    $state = bratonien_tools_nc_scheduler_read_state();
+    $state['state'] = 'error';
+    $state['message'] = 'Der native NC-Abgleich konnte nicht gestartet werden.';
+    $state['timestamp'] = time();
+    bratonien_tools_nc_scheduler_write_state($state);
+    if ($connection_id > 0)
+    {
+      bratonien_tools_nc_scheduler_write_connection_status($connection_id, 'error', 'Abgleich konnte nicht gestartet werden.');
+    }
+    throw new RuntimeException('Der native NC-Abgleich konnte nicht gestartet werden.');
+  }
+
+  return array('started'=>true, 'message'=>$connection_id > 0 ? 'Abgleich für Verbindung #'.$connection_id.' wurde angefordert.' : 'Abgleich für alle Verbindungen wurde angefordert.');
+}
+
+function bratonien_tools_nc_scheduler_tick()
+{
+  $state = bratonien_tools_nc_scheduler_read_state();
+  if (isset($state['enabled']) && !$state['enabled']) return;
+  $next_due = (int)($state['next_due'] ?? 0);
+  if ($next_due > time()) return;
+
+  try
+  {
+    bratonien_tools_nc_scheduler_spawn(false, 0);
+  }
+  catch (Throwable $e)
+  {
+    $state = bratonien_tools_nc_scheduler_read_state();
+    $state['state'] = 'error';
+    $state['message'] = $e->getMessage();
+    $state['timestamp'] = time();
+    $state['next_due'] = time() + bratonien_tools_nc_scheduler_interval();
+    bratonien_tools_nc_scheduler_write_state($state);
+  }
+}
--- a/include/nc_connector_system.inc.php
+++ b/include/nc_connector_system.inc.php
@@ -4,109 +4,13 @@ if (!defined('PHPWG_ROOT_PATH'))
  die('Hacking attempt!');
 }

-function bratonien_tools_nc_connector_systemctl_value(array $args)
-{
-  if (!function_exists('proc_open'))
-  {
-    return '';
-  }
-
-  $command = array_merge(array('/usr/bin/systemctl'), $args);
-  $spec = array(
-    0 => array('file', '/dev/null', 'r'),
-    1 => array('pipe', 'w'),
-    2 => array('pipe', 'w'),
-  );
-  $environment = array_merge($_ENV, array('LC_ALL'=>'C', 'LANG'=>'C'));
-  $process = @proc_open($command, $spec, $pipes, null, $environment);
-  if (!is_resource($process))
-  {
-    return '';
-  }
-  $stdout = stream_get_contents($pipes[1]);
-  stream_get_contents($pipes[2]);
-  fclose($pipes[1]);
-  fclose($pipes[2]);
-  $exit = proc_close($process);
-  return $exit === 0 ? trim((string)$stdout) : '';
-}
-
-function bratonien_tools_nc_connector_parse_systemd_time($value)
-{
-  $value = trim((string)$value);
-  if ($value === '' || strtolower($value) === 'n/a')
-  {
-    return 0;
-  }
-  $parsed = strtotime($value);
-  return $parsed === false ? 0 : (int)$parsed;
-}
-
-function bratonien_tools_nc_connector_monotonic_to_timestamp($value)
-{
-  $value = trim((string)$value);
-  if ($value === '' || $value === '0' || strtolower($value) === 'n/a')
-  {
-    return 0;
-  }
-
-  if (preg_match('/^([0-9]+)(?:us)?$/', $value, $matches))
-  {
-    $next_boot_seconds = ((float)$matches[1]) / 1000000;
-  }
-  else
-  {
-    return 0;
-  }
-
-  $uptime_raw = @file_get_contents('/proc/uptime');
-  if (!is_string($uptime_raw) || !preg_match('/^([0-9]+(?:\.[0-9]+)?)/', trim($uptime_raw), $uptime_match))
-  {
-    return 0;
-  }
-
-  $remaining = $next_boot_seconds - (float)$uptime_match[1];
-  if ($remaining < -1)
-  {
-    return 0;
-  }
-
-  return (int)round(time() + max(0, $remaining));
-}
-
-function bratonien_tools_nc_connector_next_from_timer_list($timer)
-{
-  $line = bratonien_tools_nc_connector_systemctl_value(array(
-    'list-timers', '--all', '--no-pager', '--no-legend', $timer,
-  ));
-  if ($line === '')
-  {
-    return 0;
-  }
-
-  $first_line = trim((string)strtok($line, "\n"));
-  if (preg_match('/^(\S+\s+\d{4}-\d{2}-\d{2}\s+\d{2}:\d{2}:\d{2}\s+\S+)/', $first_line, $matches))
-  {
-    $parsed = strtotime($matches[1]);
-    return $parsed === false ? 0 : (int)$parsed;
-  }
-
-  return 0;
-}
+require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_scheduler.inc.php');

 function bratonien_tools_nc_connector_connection_last_status(array $connection)
 {
  $empty = array(
-    'timestamp'=>0,
-    'label'=>'Nicht verfügbar',
-    'state'=>'',
-    'message'=>'',
-    'auth_mode'=>'',
-    'api_state'=>'',
-    'api_message'=>'',
-    'fallback_state'=>'',
-    'fallback_message'=>'',
-    'error_detail'=>'',
+    'timestamp'=>0,'label'=>'Nicht verfügbar','state'=>'','message'=>'','auth_mode'=>'',
+    'api_state'=>'','api_message'=>'','fallback_state'=>'','fallback_message'=>'','error_detail'=>'',
  );

  $connection_id = (int)($connection['id'] ?? 0);
@@ -114,42 +18,25 @@ function bratonien_tools_nc_connector_connection_last_status(array $connection)
  if ($connection_id > 0)
  {
    $candidates[] = rtrim(PHPWG_ROOT_PATH, '/').'/_data/bratonien-tools/nc-connector-status/connection-'.$connection_id.'.json';
+    $candidates[] = rtrim(PHPWG_ROOT_PATH, '/').'/_data/bratonien-tools/nc-connector-state/connection-'.$connection_id.'/connector-status.json';
  }

  $config = isset($connection['config']) && is_array($connection['config']) ? $connection['config'] : array();
  $state_dir = rtrim((string)($config['state_dir'] ?? ''), '/');
-  if ($state_dir === '' && $connection_id > 0)
-  {
-    $state_dir = '/var/lib/bratonien-tools/nc-connector/connection-'.$connection_id;
-  }
-  if ($state_dir !== '')
-  {
-    $candidates[] = $state_dir.'/connector-status.json';
-  }
+  if ($state_dir !== '') $candidates[] = $state_dir.'/connector-status.json';

  $decoded = null;
-  foreach ($candidates as $candidate)
+  foreach (array_unique($candidates) as $candidate)
  {
-    if (!is_readable($candidate))
-    {
-      continue;
-    }
+    if (!is_readable($candidate)) continue;
    $value = json_decode((string)@file_get_contents($candidate), true);
-    if (is_array($value))
-    {
-      $decoded = $value;
-      break;
-    }
-  }
-  if (!is_array($decoded))
-  {
-    return $empty;
+    if (is_array($value)) { $decoded = $value; break; }
  }
+  if (!is_array($decoded)) return $empty;

  $timestamp = (int)($decoded['timestamp'] ?? 0);
  $api = isset($decoded['api']) && is_array($decoded['api']) ? $decoded['api'] : array();
  $fallback = isset($decoded['fallback']) && is_array($decoded['fallback']) ? $decoded['fallback'] : array();
-
  return array(
    'timestamp'=>$timestamp,
    'label'=>$timestamp > 0 ? date('d.m.Y H:i:s', $timestamp) : 'Nicht verfügbar',
@@ -166,99 +53,88 @@ function bratonien_tools_nc_connector_connection_last_status(array $connection)

 function bratonien_tools_nc_connector_last_status(array $connections)
 {
-  $latest = array('timestamp'=>0, 'state'=>'', 'message'=>'', 'auth_mode'=>'', 'api_state'=>'', 'api_message'=>'', 'fallback_state'=>'', 'fallback_message'=>'', 'error_detail'=>'');
-
+  $latest = array('timestamp'=>0,'state'=>'','message'=>'','auth_mode'=>'','api_state'=>'','api_message'=>'','fallback_state'=>'','fallback_message'=>'','error_detail'=>'');
  foreach ($connections as $connection)
  {
-    if (empty($connection['enabled']))
-    {
-      continue;
-    }
-
+    if (empty($connection['enabled'])) continue;
    $status = bratonien_tools_nc_connector_connection_last_status($connection);
-    if ((int)$status['timestamp'] >= (int)$latest['timestamp'])
-    {
-      $latest = $status;
-    }
+    if ((int)$status['timestamp'] >= (int)$latest['timestamp']) $latest = $status;
  }
-
  return $latest;
 }

 function bratonien_tools_nc_connector_system_status(array $connections = array())
 {
-  $timer = 'bratonien-nc-connector.timer';
-  $service = 'bratonien-nc-connector.service';
-
-  $active = bratonien_tools_nc_connector_systemctl_value(array('is-active', $timer));
-  $enabled = bratonien_tools_nc_connector_systemctl_value(array('is-enabled', $timer));
-  $service_active_raw = bratonien_tools_nc_connector_systemctl_value(array('is-active', $service));
-  $service_active = in_array($service_active_raw, array('active', 'activating'), true);
-  $service_started_raw = bratonien_tools_nc_connector_systemctl_value(array('show', $service, '--property=ActiveEnterTimestamp', '--value'));
-  $service_started_timestamp = bratonien_tools_nc_connector_parse_systemd_time($service_started_raw);
-
-  $next_realtime_raw = bratonien_tools_nc_connector_systemctl_value(array('show', $timer, '--property=NextElapseUSecRealtime', '--value'));
-  $next_timestamp = bratonien_tools_nc_connector_parse_systemd_time($next_realtime_raw);
-
-  if ($next_timestamp <= 0)
-  {
-    $next_monotonic_raw = bratonien_tools_nc_connector_systemctl_value(array('show', $timer, '--property=NextElapseUSecMonotonic', '--value'));
-    $next_timestamp = bratonien_tools_nc_connector_monotonic_to_timestamp($next_monotonic_raw);
-  }
-
-  if ($next_timestamp <= 0)
-  {
-    $next_timestamp = bratonien_tools_nc_connector_next_from_timer_list($timer);
-  }
-
+  $scheduler = bratonien_tools_nc_scheduler_read_state();
+  $enabled = !isset($scheduler['enabled']) || !empty($scheduler['enabled']);
+  $scheduler_state = (string)($scheduler['state'] ?? '');
+  $running = $scheduler_state === 'running';
+  $queued = $scheduler_state === 'queued';
+  $started = (int)($scheduler['started_at'] ?? 0);
+  $next = (int)($scheduler['next_due'] ?? 0);
  $last = bratonien_tools_nc_connector_last_status($connections);
-  if ($last['timestamp'] <= 0)
-  {
-    $last_raw = bratonien_tools_nc_connector_systemctl_value(array('show', $service, '--property=ExecMainExitTimestamp', '--value'));
-    $last['timestamp'] = bratonien_tools_nc_connector_parse_systemd_time($last_raw);
-  }

-  if ($next_timestamp > 0)
+  if ($next > 0)
  {
-    $next_label = date('d.m.Y H:i:s', $next_timestamp);
-  }
-  elseif ($service_active && $active === 'active' && $enabled === 'enabled')
-  {
-    $next_label = 'Nach Abschluss des aktuellen Laufs';
-  }
-  elseif ($active === 'active' && $enabled === 'enabled')
-  {
-    $next_label = 'Wird von systemd neu geplant';
+    $next_label = date('d.m.Y H:i:s', $next).' (beim nächsten Piwigo-Aufruf)';
  }
  else
  {
-    $next_label = 'Nicht verfügbar';
+    $next_label = 'Beim nächsten Piwigo-Aufruf';
  }

+  $scheduler_timestamp = (int)($scheduler['timestamp'] ?? 0);
+  if ($scheduler_timestamp > (int)$last['timestamp'])
+  {
+    $last['timestamp'] = $scheduler_timestamp;
+    $last['state'] = $scheduler_state;
+    $last['message'] = (string)($scheduler['message'] ?? '');
+    if ($scheduler_state === 'error')
+    {
+      $detail = trim((string)($scheduler['stderr'] ?? ''));
+      if ($detail === '') $detail = trim((string)($scheduler['stdout'] ?? ''));
+      $last['error_detail'] = $detail;
+    }
+  }
+  elseif ((int)$last['timestamp'] <= 0 && !empty($scheduler['finished_at']))
+  {
+    $last['timestamp'] = (int)$scheduler['finished_at'];
+    $last['state'] = $scheduler_state;
+    $last['message'] = (string)($scheduler['message'] ?? '');
+    if ((string)$last['state'] === 'error')
+    {
+      $detail = trim((string)($scheduler['stderr'] ?? ''));
+      if ($detail === '') $detail = trim((string)($scheduler['stdout'] ?? ''));
+      $last['error_detail'] = $detail;
+    }
+  }
+
+  $current_label = 'Kein Lauf aktiv';
+  if ($queued) $current_label = 'Abgleich angefordert';
+  if ($running) $current_label = $started > 0 ? 'Läuft seit '.date('d.m.Y H:i:s', $started) : 'Läuft gerade';
+
  return array(
-    'timer_name' => $timer,
-    'timer_active' => $active === 'active',
-    'timer_enabled' => $enabled === 'enabled',
-    'service_active' => $service_active,
-    'current_run_timestamp' => $service_started_timestamp,
-    'current_run_label' => $service_active
-      ? ($service_started_timestamp > 0 ? 'Läuft seit '.date('d.m.Y H:i:s', $service_started_timestamp) : 'Läuft gerade')
-      : 'Kein Lauf aktiv',
-    'last_run_timestamp' => (int)$last['timestamp'],
-    'last_run_label' => $last['timestamp'] > 0 ? date('d.m.Y H:i:s', (int)$last['timestamp']) : 'Nicht verfügbar',
-    'last_run_state' => (string)$last['state'],
-    'last_run_message' => (string)$last['message'],
-    'last_run_auth_mode' => (string)$last['auth_mode'],
-    'last_run_api_state' => (string)$last['api_state'],
-    'last_run_api_message' => (string)$last['api_message'],
-    'last_run_fallback_state' => (string)$last['fallback_state'],
-    'last_run_fallback_message' => (string)$last['fallback_message'],
-    'last_run_error_detail' => (string)$last['error_detail'],
-    'next_run_timestamp' => $next_timestamp,
-    'next_run_label' => $next_label,
-    'legacy_runtime_exists' => is_dir('/opt/piwigo-sync'),
-    'legacy_config_exists' => is_dir('/etc/piwigo-sync'),
-    'legacy_service_exists' => is_file('/etc/systemd/system/piwigo-sync.service'),
-    'legacy_timer_exists' => is_file('/etc/systemd/system/piwigo-sync.timer'),
+    'timer_name'=>'Piwigo nativer NC-Scheduler',
+    'timer_active'=>$enabled,
+    'timer_enabled'=>$enabled,
+    'service_active'=>$running || $queued,
+    'current_run_timestamp'=>$queued ? (int)($scheduler['queued_at'] ?? 0) : $started,
+    'current_run_label'=>$current_label,
+    'last_run_timestamp'=>(int)$last['timestamp'],
+    'last_run_label'=>(int)$last['timestamp'] > 0 ? date('d.m.Y H:i:s', (int)$last['timestamp']) : 'Nicht verfügbar',
+    'last_run_state'=>(string)$last['state'],
+    'last_run_message'=>(string)$last['message'],
+    'last_run_auth_mode'=>(string)$last['auth_mode'],
+    'last_run_api_state'=>(string)$last['api_state'],
+    'last_run_api_message'=>(string)$last['api_message'],
+    'last_run_fallback_state'=>(string)$last['fallback_state'],
+    'last_run_fallback_message'=>(string)$last['fallback_message'],
+    'last_run_error_detail'=>(string)$last['error_detail'],
+    'next_run_timestamp'=>$next,
+    'next_run_label'=>$next_label,
+    'legacy_runtime_exists'=>is_dir('/opt/piwigo-sync'),
+    'legacy_config_exists'=>is_dir('/etc/piwigo-sync'),
+    'legacy_service_exists'=>is_file('/etc/systemd/system/piwigo-sync.service'),
+    'legacy_timer_exists'=>is_file('/etc/systemd/system/piwigo-sync.timer'),
  );
 }
--- a/include/nc_connector_wizard_webdav_flow.inc.php
+++ b/include/nc_connector_wizard_webdav_flow.inc.php
@@ -28,7 +28,7 @@ function bratonien_tools_nc_wizard_scan_webdav_first()
  {
    try
    {
-      $response = bratonien_tools_nc_wizard_http($candidate_url.'/status.php');
+      $response = bratonien_tools_nc_transport_http($candidate_url.'/status.php');
      if ($response['status'] < 200 || $response['status'] >= 300) continue;
      $candidate_status = json_decode($response['body'], true);
      if (!is_array($candidate_status) || empty($candidate_status['installed'])) continue;
@@ -44,7 +44,7 @@ function bratonien_tools_nc_wizard_scan_webdav_first()
    throw new RuntimeException('Unter dieser Adresse konnte keine Nextcloud erreicht werden. HTTP und HTTPS wurden automatisch geprüft.');
  }

-  $user_response = bratonien_tools_nc_wizard_http(
+  $user_response = bratonien_tools_nc_transport_http(
    $base_url.'/ocs/v2.php/cloud/user?format=json',
    $username,
    $password,
@@ -104,7 +104,7 @@ function bratonien_tools_nc_wizard_scan_webdav_first()
    'api_error'=>'',
  ));

-  bratonien_tools_nc_wizard_refresh_directory_state($state, '');
+  bratonien_tools_nc_transport_refresh_directory_state($state, '');
  bratonien_tools_nc_wizard_store($state);

  return array('message'=>'Nextcloud und WebDAV wurden bestätigt. Jetzt können die Verzeichnisse des angemeldeten Benutzers ausgewählt werden.');
--- a/include/nc_productive_ws.inc.php
+++ b/include/nc_productive_ws.inc.php
@@ -56,7 +56,6 @@ function bratonien_tools_nc_find_album($parent_id, $dir, $name, $excluded_site_i
 SELECT id, dir, name
  FROM '.CATEGORIES_TABLE.'
  WHERE '.$where_parent.'
-    AND (site_id IS NULL OR site_id <> '.(int)$excluded_site_id.')
    AND (
      dir = \''.$dir_sql.'\'
      OR LOWER(name) = LOWER(\''.$name_sql.'\')
@@ -122,10 +121,9 @@ function bratonien_tools_nc_managed_images($basedir)

 function bratonien_tools_nc_remove_storage_categories($site_id)
 {
-  $ids = query2array('SELECT id FROM '.CATEGORIES_TABLE.' WHERE site_id='.(int)$site_id.' AND dir IS NOT NULL', null, 'id');
-  if (!$ids) return 0;
-  delete_categories(array_map('intval', $ids));
-  return count($ids);
+  // Bestehende Piwigo-Alben gehoeren nicht automatisch dem Connector.
+  // Ohne eindeutige Connector-Eigentumsmarkierung darf hier nichts geloescht werden.
+  return 0;
 }

 function bratonien_tools_ws_nc_sync_productive($params, &$service)
@@ -169,8 +167,6 @@ function bratonien_tools_ws_nc_sync_productive($params, &$service)

  try
  {
-    $counts['removed_duplicate_categories'] = bratonien_tools_nc_remove_storage_categories($site_id);
-
    list($dbnow) = pwg_db_fetch_row(pwg_query('SELECT NOW()'));
    $fs_dirs = $site_reader->get_full_directories($basedir);
    usort($fs_dirs, function($a, $b)
@@ -199,20 +195,10 @@ function bratonien_tools_ws_nc_sync_productive($params, &$service)
    $db_elements = bratonien_tools_nc_managed_images($basedir);
    $db_by_path = array_flip($db_elements);

-    $to_delete = array();
-    foreach ($db_elements as $id=>$path)
-    {
-      if (!array_key_exists($path, $fs)) $to_delete[] = (int)$id;
-    }
-    if ($to_delete)
-    {
-      delete_elements($to_delete, false);
-      $counts['del_elements'] = count($to_delete);
-      foreach ($to_delete as $id)
-      {
-        if (isset($db_elements[$id])) unset($db_by_path[$db_elements[$id]], $db_elements[$id]);
-      }
-    }
+    // Nicht-destruktiver Schutz: Bestehende Piwigo-Bilder werden niemals allein
+    // deshalb geloescht, weil sie im aktuellen WebDAV-Scan nicht vorkommen.
+    // Das Entfernen ist erst wieder zulaessig, wenn Connector-Eigentum eindeutig
+    // und verbindungsbezogen gespeichert wird.

    $next_element_id = pwg_db_nextval('id', IMAGES_TABLE);
    $image_inserts = array();
@@ -232,13 +218,9 @@ function bratonien_tools_ws_nc_sync_productive($params, &$service)

      if (isset($db_by_path[$path]))
      {
-        $id = (int)$db_by_path[$path];
-        $all_ids[] = $id;
-        pwg_query('DELETE FROM '.IMAGE_CATEGORY_TABLE.' WHERE image_id='.$id);
-        if ($category_id !== null)
-        {
-          single_insert(IMAGE_CATEGORY_TABLE, array('image_id'=>$id, 'category_id'=>$category_id));
-        }
+        // Altbestand niemals umhaengen. Vorhandene Bild-Album-Zuordnungen bleiben
+        // exakt bestehen; der Connector darf nur neue Datensaetze ergaenzen.
+        $all_ids[] = (int)$db_by_path[$path];
        continue;
      }

@@ -276,8 +258,10 @@ function bratonien_tools_ws_nc_sync_productive($params, &$service)
      $counts['new_elements'] = count($new_ids);
    }

+    // Bestehende Bilder werden nicht durch den Connector aktualisiert. Nur neu
+    // angelegte Connector-Bilder erhalten die aus der Quelle ermittelten Attribute.
    $updates = array();
-    foreach ($all_ids as $id)
+    foreach ($new_ids as $id)
    {
      $path_result = pwg_query('SELECT path FROM '.IMAGES_TABLE.' WHERE id='.(int)$id.' LIMIT 1');
      if (!pwg_db_num_rows($path_result)) continue;
--- a/include/nc_transport.inc.php
+++ b/include/nc_transport.inc.php
@@ -0,0 +1,340 @@
+<?php
+
+function bratonien_tools_nc_transport_host($url)
+{
+  $host = trim((string)parse_url((string)$url, PHP_URL_HOST));
+  if ($host === '') throw new RuntimeException('Die Nextcloud-Adresse enthält keinen gültigen Hostnamen oder keine IP-Adresse.');
+  return trim($host, '[]');
+}
+
+function bratonien_tools_nc_transport_scheme($url)
+{
+  $scheme = strtolower(trim((string)parse_url((string)$url, PHP_URL_SCHEME)));
+  if (!in_array($scheme, array('http','https'), true)) throw new RuntimeException('Nextcloud muss per HTTP oder HTTPS angesprochen werden.');
+  return $scheme;
+}
+
+function bratonien_tools_nc_transport_is_ip($host)
+{
+  return filter_var(trim((string)$host, '[]'), FILTER_VALIDATE_IP) !== false;
+}
+
+function bratonien_tools_nc_transport_public_ip($host)
+{
+  static $cache = array();
+
+  $host = strtolower(trim((string)$host, '[]'));
+  if ($host === '') throw new RuntimeException('Für die Nextcloud-Verbindung fehlt der Hostname.');
+  if (bratonien_tools_nc_transport_is_ip($host)) return $host;
+  if (isset($cache[$host])) return $cache[$host];
+  if (!function_exists('curl_init')) throw new RuntimeException('Der öffentliche DNS-Abgleich benötigt PHP-cURL.');
+
+  $providers = array(
+    array('host'=>'dns.google', 'ips'=>array('8.8.8.8','8.8.4.4'), 'url'=>'https://dns.google/resolve?name='.rawurlencode($host).'&type=A'),
+    array('host'=>'cloudflare-dns.com', 'ips'=>array('1.1.1.1','1.0.0.1'), 'url'=>'https://cloudflare-dns.com/dns-query?name='.rawurlencode($host).'&type=A'),
+  );
+
+  foreach ($providers as $provider)
+  {
+    foreach ($provider['ips'] as $resolver_ip)
+    {
+      $ch = curl_init($provider['url']);
+      $options = array(
+        CURLOPT_RETURNTRANSFER=>true,
+        CURLOPT_FOLLOWLOCATION=>false,
+        CURLOPT_CONNECTTIMEOUT=>5,
+        CURLOPT_TIMEOUT=>10,
+        CURLOPT_HTTPHEADER=>array('Accept: application/dns-json'),
+        CURLOPT_USERAGENT=>'Bratonien-Tools-DNS/0.9.7.1',
+      );
+      if (defined('CURLOPT_RESOLVE'))
+      {
+        $options[CURLOPT_RESOLVE] = array($provider['host'].':443:'.$resolver_ip);
+      }
+      curl_setopt_array($ch, $options);
+      $body = curl_exec($ch);
+      $errno = curl_errno($ch);
+      $status = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
+      curl_close($ch);
+      if ($body === false || $errno !== 0 || $status < 200 || $status >= 300) continue;
+
+      $decoded = json_decode((string)$body, true);
+      if (!is_array($decoded) || !isset($decoded['Answer']) || !is_array($decoded['Answer'])) continue;
+      foreach ($decoded['Answer'] as $answer)
+      {
+        if ((int)($answer['type'] ?? 0) !== 1) continue;
+        $ip = trim((string)($answer['data'] ?? ''));
+        if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE) === false) continue;
+        return $cache[$host] = $ip;
+      }
+    }
+  }
+
+  throw new RuntimeException('Für '.$host.' konnte keine öffentliche IPv4-Adresse ermittelt werden.');
+}
+
+function bratonien_tools_nc_transport_resolve_entry($url)
+{
+  $scheme = bratonien_tools_nc_transport_scheme($url);
+  $host = bratonien_tools_nc_transport_host($url);
+  if (bratonien_tools_nc_transport_is_ip($host)) return null;
+
+  $port = (int)parse_url((string)$url, PHP_URL_PORT);
+  if ($port < 1) $port = $scheme === 'https' ? 443 : 80;
+  $ip = bratonien_tools_nc_transport_public_ip($host);
+  return $host.':'.$port.':'.$ip;
+}
+
+function bratonien_tools_nc_transport_apply_curl(array &$options, $url)
+{
+  $entry = bratonien_tools_nc_transport_resolve_entry($url);
+  if ($entry !== null)
+  {
+    if (!defined('CURLOPT_RESOLVE')) throw new RuntimeException('Diese cURL-Version unterstützt keine direkte Host-zu-IP-Zuordnung.');
+    $options[CURLOPT_RESOLVE] = array($entry);
+  }
+}
+
+function bratonien_tools_nc_transport_http($url, $username = '', $password = '', array $headers = array())
+{
+  if (!function_exists('curl_init')) throw new RuntimeException('Der Server kann Nextcloud derzeit nicht per HTTP prüfen.');
+
+  $ch = curl_init($url);
+  $options = array(
+    CURLOPT_RETURNTRANSFER=>true,
+    CURLOPT_FOLLOWLOCATION=>true,
+    CURLOPT_MAXREDIRS=>3,
+    CURLOPT_CONNECTTIMEOUT=>8,
+    CURLOPT_TIMEOUT=>15,
+    CURLOPT_HTTPHEADER=>array_merge(array('Accept: application/json'), $headers),
+    CURLOPT_USERAGENT=>'Bratonien-Tools-NC-Wizard/0.9.7.1',
+  );
+  bratonien_tools_nc_transport_apply_curl($options, $url);
+
+  if ($username !== '')
+  {
+    $options[CURLOPT_HTTPAUTH] = CURLAUTH_BASIC;
+    $options[CURLOPT_USERPWD] = $username.':'.$password;
+  }
+
+  curl_setopt_array($ch, $options);
+  $body = curl_exec($ch);
+  $errno = curl_errno($ch);
+  $error = curl_error($ch);
+  $status = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
+  curl_close($ch);
+
+  if ($body === false || $errno !== 0)
+  {
+    throw new RuntimeException('Verbindung fehlgeschlagen'.($error !== '' ? ': '.$error : '.'));
+  }
+
+  return array('status'=>$status, 'body'=>(string)$body);
+}
+
+function bratonien_tools_nc_transport_webdav_list(array $state, $path = '')
+{
+  if (empty($state['scan_ok']) || trim((string)$state['base_url']) === '' || trim((string)$state['username']) === '' || (string)$state['_password'] === '')
+  {
+    throw new RuntimeException('Die Nextcloud-Sitzung des Assistenten ist nicht vollständig.');
+  }
+  if (!function_exists('curl_init')) throw new RuntimeException('cURL ist für die Verzeichnisauswahl nicht verfügbar.');
+
+  $path = trim((string)$path, '/');
+  if ($path !== '' && preg_match('#(^|/)\.\.(/|$)#', $path)) throw new RuntimeException('Ungültiger Verzeichnispfad.');
+
+  $segments = $path === '' ? array() : array_map('rawurlencode', explode('/', $path));
+  $user = rawurlencode((string)$state['username']);
+  $url = rtrim((string)$state['base_url'], '/').'/remote.php/dav/files/'.$user.'/'.implode('/', $segments);
+  if (substr($url, -1) !== '/') $url .= '/';
+
+  $body = '<?xml version="1.0"?><d:propfind xmlns:d="DAV:" xmlns:oc="http://owncloud.org/ns"><d:prop><d:resourcetype/><d:displayname/><oc:fileid/></d:prop></d:propfind>';
+  $ch = curl_init($url);
+  $options = array(
+    CURLOPT_RETURNTRANSFER=>true,
+    CURLOPT_CUSTOMREQUEST=>'PROPFIND',
+    CURLOPT_POSTFIELDS=>$body,
+    CURLOPT_HTTPHEADER=>array('Depth: 1','Content-Type: application/xml; charset=utf-8'),
+    CURLOPT_HTTPAUTH=>CURLAUTH_BASIC,
+    CURLOPT_USERPWD=>(string)$state['username'].':'.(string)$state['_password'],
+    CURLOPT_CONNECTTIMEOUT=>8,
+    CURLOPT_TIMEOUT=>20,
+  );
+  bratonien_tools_nc_transport_apply_curl($options, $url);
+  curl_setopt_array($ch, $options);
+  $response = curl_exec($ch);
+  $errno = curl_errno($ch);
+  $error = curl_error($ch);
+  $status = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
+  curl_close($ch);
+
+  if ($response === false || $errno !== 0) throw new RuntimeException('Nextcloud-Verzeichnisse konnten nicht geladen werden'.($error !== '' ? ': '.$error : '.'));
+  if ($status === 401 || $status === 403) throw new RuntimeException('Nextcloud hat den Zugriff auf dieses Verzeichnis abgelehnt.');
+  if ($status !== 207) throw new RuntimeException('Nextcloud-Verzeichnisabfrage antwortete mit HTTP '.$status.'.');
+
+  libxml_use_internal_errors(true);
+  $xml = simplexml_load_string((string)$response);
+  if ($xml === false) throw new RuntimeException('Nextcloud hat eine ungültige WebDAV-Antwort geliefert.');
+  $xml->registerXPathNamespace('d', 'DAV:');
+  $xml->registerXPathNamespace('oc', 'http://owncloud.org/ns');
+
+  $children = array();
+  $fileids = array();
+  $current_fileid = 0;
+  $base_path = (string)parse_url($url, PHP_URL_PATH);
+
+  foreach ($xml->xpath('//d:response') as $item)
+  {
+    $item->registerXPathNamespace('d', 'DAV:');
+    $item->registerXPathNamespace('oc', 'http://owncloud.org/ns');
+    $hrefs = $item->xpath('d:href');
+    $collections = $item->xpath('d:propstat/d:prop/d:resourcetype/d:collection');
+    $ids = $item->xpath('d:propstat/d:prop/oc:fileid');
+    if (!$hrefs || !$collections || !$ids) continue;
+
+    $fileid = (int)trim((string)$ids[0]);
+    if ($fileid < 1) continue;
+    $href = rawurldecode((string)$hrefs[0]);
+    $href_path = (string)parse_url($href, PHP_URL_PATH);
+
+    if (rtrim($href_path, '/') === rtrim($base_path, '/'))
+    {
+      $current_fileid = $fileid;
+      continue;
+    }
+
+    $name = basename(rtrim($href_path, '/'));
+    if ($name === '') continue;
+    $child_path = $path === '' ? $name : $path.'/'.$name;
+    $children[$child_path] = $name;
+    $fileids[$child_path] = $fileid;
+  }
+  natcasesort($children);
+
+  if ($current_fileid < 1) throw new RuntimeException('Nextcloud hat für das aktuelle Verzeichnis keine eindeutige Datei-ID geliefert.');
+
+  $parent = '';
+  if ($path !== '')
+  {
+    $parts = explode('/', $path);
+    array_pop($parts);
+    $parent = implode('/', $parts);
+  }
+
+  return array(
+    'current'=>$path,
+    'parent'=>$parent,
+    'children'=>$children,
+    'current_fileid'=>$current_fileid,
+    'fileids'=>$fileids,
+  );
+}
+
+function bratonien_tools_nc_transport_refresh_directory_state(array &$state, $path = null)
+{
+  if ($path === null) $path = (string)($state['directory_path'] ?? '');
+  $listing = bratonien_tools_nc_transport_webdav_list($state, $path);
+  $state['directory_path'] = (string)$listing['current'];
+  $state['directory_parent'] = (string)$listing['parent'];
+  $state['directory_children'] = (array)$listing['children'];
+  $state['directory_current_fileid'] = (int)$listing['current_fileid'];
+  $state['directory_fileids'] = (array)$listing['fileids'];
+  if (!isset($state['directory_selected']) || !is_array($state['directory_selected'])) $state['directory_selected'] = array();
+  if (!isset($state['directory_selected_fileids']) || !is_array($state['directory_selected_fileids'])) $state['directory_selected_fileids'] = array();
+}
+
+function bratonien_tools_nc_transport_wizard_directory_browse()
+{
+  $state = bratonien_tools_nc_wizard_state();
+  if ((int)$state['step'] !== 2 || (string)$state['technical_stage'] !== 'mounts' || empty($state['directory_selection_ready'])) throw new RuntimeException('Die Verzeichnisauswahl ist in diesem Fenster nicht verfügbar.');
+  $path = trim((string)($_POST['nc_wizard_directory_path'] ?? ''), '/');
+  bratonien_tools_nc_transport_refresh_directory_state($state, $path);
+  bratonien_tools_nc_wizard_store($state);
+  return array('message'=>'Verzeichnis geöffnet.');
+}
+
+function bratonien_tools_nc_transport_edit_start()
+{
+  $id = (int)($_POST['connection_id'] ?? 0);
+  $connection = bratonien_tools_nc_connector_connection($id, true);
+  if (!$connection) throw new RuntimeException('Connector-Verbindung wurde nicht gefunden.');
+
+  $config = isset($connection['config']) && is_array($connection['config']) ? $connection['config'] : array();
+  $is_webdav = (string)$connection['adapter'] === 'remote'
+    && (string)($config['source_mode'] ?? '') === 'webdav-placeholder';
+  if (!$is_webdav) return bratonien_tools_nc_connector_edit_start();
+
+  $credentials = bratonien_tools_nc_connector_scoped_secret($connection);
+  $base_url = trim((string)($config['nextcloud_url'] ?? ''));
+  $username = trim((string)($credentials['nextcloud_user'] ?? ''));
+  if ($username === '') $username = trim((string)($config['nextcloud_access_user'] ?? $config['access_user'] ?? ''));
+  $password = (string)($credentials['nextcloud_password'] ?? '');
+
+  $roots = isset($config['roots']) && is_array($config['roots']) ? array_values($config['roots']) : array();
+  $selected = array();
+  $selected_ids = array();
+  foreach ($roots as $root)
+  {
+    $path = trim((string)($root['webdav_path'] ?? ''), '/');
+    $fileid = (int)($root['fileid'] ?? 0);
+    if ($fileid < 1) continue;
+    $selected[] = $path;
+    $selected_ids[$path] = $fileid;
+  }
+
+  $state = bratonien_tools_nc_wizard_state();
+  $state = array_merge($state, array(
+    'editing_connection_id'=>$id,
+    'editing_adapter'=>(string)$connection['adapter'],
+    'editing_mode'=>'update',
+    'connection_name'=>(string)$connection['name'],
+    'host_input'=>$base_url,
+    'base_url'=>$base_url,
+    'username'=>$username,
+    '_password'=>$password,
+    '_fallback_user'=>(string)($credentials['piwigo_user'] ?? ''),
+    '_fallback_password'=>(string)($credentials['piwigo_password'] ?? ''),
+    '_api_key_id'=>(string)($credentials['api_key_id'] ?? ''),
+    '_api_key_secret'=>(string)($credentials['api_key_secret'] ?? ''),
+    'api_status'=>trim((string)($credentials['api_key_id'] ?? '')) !== '' && trim((string)($credentials['api_key_secret'] ?? '')) !== '' ? 'ok' : 'pending',
+    'roots'=>$roots,
+    'directory_selected'=>$selected,
+    'directory_selected_fileids'=>$selected_ids,
+    'source_mode'=>'webdav-placeholder',
+    'transport'=>'webdav',
+  ));
+
+  if ($base_url !== '' && $username !== '' && $password !== '')
+  {
+    $state['step'] = 2;
+    $state['scan_ok'] = true;
+    $state['technical_stage'] = 'mounts';
+    $state['technical_source'] = 'WebDAV';
+    $state['technical_error'] = '';
+    $state['technical_complete'] = false;
+    $state['directory_selection_ready'] = true;
+    $state['directory_path'] = '';
+    $state['directory_parent'] = '';
+    $state['directory_children'] = array();
+    $state['directory_current_fileid'] = 0;
+
+    try
+    {
+      bratonien_tools_nc_transport_refresh_directory_state($state, '');
+    }
+    catch (Throwable $e)
+    {
+      $state['step'] = 1;
+      $state['scan_ok'] = false;
+      $state['technical_error'] = $e->getMessage();
+    }
+  }
+  else
+  {
+    $state['step'] = 1;
+    $state['scan_ok'] = false;
+  }
+
+  bratonien_tools_nc_wizard_store($state);
+  return array('message'=>'Verbindung #'.$id.' wurde zum Bearbeiten geöffnet.');
+}
--- a/include/tool_registry.inc.php
+++ b/include/tool_registry.inc.php
@@ -6,7 +6,7 @@ if (!defined('PHPWG_ROOT_PATH'))

 if (isset($GLOBALS['template']) && is_object($GLOBALS['template']) && method_exists($GLOBALS['template'], 'func_combine_script'))
 {
-  $script_version = function_exists('bratonien_tools_current_version') ? bratonien_tools_current_version() : '0.9.6.27';
+  $script_version = function_exists('bratonien_tools_current_version') ? bratonien_tools_current_version() : '0.9.7.1';
  $GLOBALS['template']->func_combine_script(array(
    'id'=>'bratonien_nc_connector_edit_v2',
    'path'=>BRATONIEN_TOOLS_PATH.'js/nc_connector_edit_v2.js',
@@ -41,57 +41,23 @@ require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_delete_safe.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_webdav.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_wizard_webdav_flow.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_edit.inc.php');
+require_once(BRATONIEN_TOOLS_PATH . 'include/nc_transport.inc.php');
+require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_scheduler.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_system.inc.php');

 function bratonien_tools_nc_connector_run_now()
 {
-  $service = 'bratonien-nc-connector.service';
-  $active = bratonien_tools_nc_connector_systemctl_value(array('is-active', $service));
-  if ($active === 'active' || $active === 'activating')
+  $connection_id = isset($_POST['connection_id']) ? max(0, (int)$_POST['connection_id']) : 0;
+  if ($connection_id > 0)
  {
-    return array('message'=>'Der NC-Abgleich läuft bereits.');
-  }
-
-  if (!function_exists('proc_open'))
-  {
-    throw new RuntimeException('Der NC-Abgleich konnte nicht gestartet werden: proc_open ist nicht verfügbar.');
-  }
-
-  $commands = array(
-    array('/usr/bin/sudo', '-n', '/usr/bin/systemctl', 'start', '--no-block', $service),
-    array('/usr/bin/systemctl', 'start', '--no-block', $service),
-  );
-  $last_error = '';
-
-  foreach ($commands as $command)
-  {
-    if (!is_executable($command[0]))
+    $connection = bratonien_tools_nc_connector_connection($connection_id, false);
+    if (!$connection)
    {
-      continue;
+      throw new RuntimeException('Die ausgewählte Verbindung existiert nicht.');
    }
-    $spec = array(
-      0=>array('file','/dev/null','r'),
-      1=>array('pipe','w'),
-      2=>array('pipe','w'),
-    );
-    $process = @proc_open($command, $spec, $pipes, null, array_merge($_ENV, array('LC_ALL'=>'C','LANG'=>'C')));
-    if (!is_resource($process))
-    {
-      continue;
-    }
-    $stdout = trim((string)stream_get_contents($pipes[1]));
-    $stderr = trim((string)stream_get_contents($pipes[2]));
-    fclose($pipes[1]);
-    fclose($pipes[2]);
-    $exit = proc_close($process);
-    if ($exit === 0)
-    {
-      return array('message'=>'NC-Abgleich wurde gestartet.');
-    }
-    $last_error = $stderr !== '' ? $stderr : $stdout;
  }
-
-  throw new RuntimeException('Der NC-Abgleich konnte nicht gestartet werden'.($last_error !== '' ? ': '.$last_error : '.'));
+  $result = bratonien_tools_nc_scheduler_spawn(true, $connection_id);
+  return array('message'=>(string)($result['message'] ?? ($connection_id > 0 ? 'Abgleich wurde gestartet.' : 'Abgleich für alle Verbindungen wurde gestartet.')));
 }

 function bratonien_tools_get_tools()
@@ -118,7 +84,7 @@ function bratonien_tools_get_tools()
    'album_share_regenerate_link' => array('handler' => 'bratonien_tools_regenerate_album_share_link'),
    'album_share_revoke' => array('handler' => 'bratonien_tools_revoke_album_share'),
    'nc_connector_create_webdav_parallel' => array('handler' => 'bratonien_tools_nc_connector_create_webdav_placeholder_from_wizard'),
-    'nc_connector_edit_start' => array('handler' => 'bratonien_tools_nc_connector_edit_start'),
+    'nc_connector_edit_start' => array('handler' => 'bratonien_tools_nc_transport_edit_start'),
    'nc_connector_update_local' => array('handler' => 'bratonien_tools_nc_connector_update_local_friendly'),
    'nc_connector_delete' => array('handler' => 'bratonien_tools_nc_connector_delete_safe'),
    'nc_connector_update_name' => array('handler' => 'bratonien_tools_nc_connector_update_name'),
@@ -126,7 +92,7 @@ function bratonien_tools_get_tools()
    'nc_connector_run_now' => array('handler' => 'bratonien_tools_nc_connector_run_now'),
    'nc_connector_wizard_scan' => array('handler' => 'bratonien_tools_nc_wizard_scan_webdav_first'),
    'nc_connector_wizard_save_technical' => array('handler' => 'bratonien_tools_nc_wizard_save_technical_flow'),
-    'nc_connector_wizard_directory_browse' => array('handler' => 'bratonien_tools_nc_wizard_directory_browse'),
+    'nc_connector_wizard_directory_browse' => array('handler' => 'bratonien_tools_nc_transport_wizard_directory_browse'),
    'nc_connector_wizard_directory_add' => array('handler' => 'bratonien_tools_nc_wizard_directory_add'),
    'nc_connector_wizard_directory_remove' => array('handler' => 'bratonien_tools_nc_wizard_directory_remove'),
    'nc_connector_wizard_save_mounts' => array('handler' => 'bratonien_tools_nc_wizard_save_sources_dispatch'),
--- a/include/watermark_engine.inc.php
+++ b/include/watermark_engine.inc.php
@@ -8,8 +8,17 @@ require_once(BRATONIEN_TOOLS_PATH . 'include/watermark_base.inc.php');

 function bratonien_tools_watermark_engine_enabled()
 {
+  static $initialized = false;
+  static $enabled = false;
+
+  if ($initialized)
+  {
+    return $enabled;
+  }
+
  $config = bratonien_tools_get_watermark_engine_config();
  $enabled = !empty($config['enabled']);
+  $initialized = true;

  // Piwigo recalculates use_watermark for custom derivatives from the native
  // watermark file itself. Therefore an active Bratonien engine must keep the
--- a/include/webdav_image_runtime.inc.php
+++ b/include/webdav_image_runtime.inc.php
@@ -7,6 +7,9 @@ if (!defined('PHPWG_ROOT_PATH'))
 function bratonien_tools_webdav_image_source_info($image_id)
 {
  static $cache = array();
+  static $connection_cache = array();
+  static $mapping_cache = array();
+
  $image_id = (int)$image_id;
  if ($image_id < 1) return null;
  if (array_key_exists($image_id, $cache)) return $cache[$image_id];
@@ -20,12 +23,12 @@ function bratonien_tools_webdav_image_source_info($image_id)
  $absolute = $path;
  if (strpos($absolute, '/') !== 0)
  {
-    $absolute = PHPWG_ROOT_PATH.ltrim(preg_replace('#^\./#', '', $absolute), '/');
+    $absolute = PHPWG_ROOT_PATH.ltrim(preg_replace('#^\\./#', '', $absolute), '/');
  }
  $resolved = realpath($absolute);
  if ($resolved === false) return $cache[$image_id] = null;

-  $normalized = str_replace('\\', '/', $resolved);
+  $normalized = str_replace('\\\\', '/', $resolved);
  if (!preg_match('#/nc-webdav-source/connection-([0-9]+)/root-([0-9]+)/(.*)$#', $normalized, $match))
  {
    return $cache[$image_id] = null;
@@ -36,60 +39,82 @@ function bratonien_tools_webdav_image_source_info($image_id)
  $relative_path = trim((string)$match[3], '/');
  if ($relative_path === '') return $cache[$image_id] = null;

-  $table = defined('BRATONIEN_TOOLS_NC_CONNECTIONS_TABLE')
-    ? BRATONIEN_TOOLS_NC_CONNECTIONS_TABLE
-    : $GLOBALS['prefixeTable'].'bratonien_tools_nc_connections';
-  $connection_result = pwg_query('SELECT config_json FROM `'.$table.'` WHERE id='.$connection_id.' LIMIT 1');
-  if (!pwg_db_num_rows($connection_result)) return $cache[$image_id] = null;
-  $connection_row = pwg_db_fetch_assoc($connection_result);
-  $config = json_decode((string)$connection_row['config_json'], true);
+  if (!array_key_exists($connection_id, $connection_cache))
+  {
+    $table = defined('BRATONIEN_TOOLS_NC_CONNECTIONS_TABLE')
+      ? BRATONIEN_TOOLS_NC_CONNECTIONS_TABLE
+      : $GLOBALS['prefixeTable'].'bratonien_tools_nc_connections';
+    $connection_result = pwg_query('SELECT config_json FROM `'.$table.'` WHERE id='.$connection_id.' LIMIT 1');
+    if (!pwg_db_num_rows($connection_result))
+    {
+      $connection_cache[$connection_id] = null;
+    }
+    else
+    {
+      $connection_row = pwg_db_fetch_assoc($connection_result);
+      $decoded = json_decode((string)$connection_row['config_json'], true);
+      $connection_cache[$connection_id] = is_array($decoded) ? $decoded : null;
+    }
+  }
+
+  $config = $connection_cache[$connection_id];
  if (!is_array($config) || (string)($config['source_mode'] ?? '') !== 'webdav-placeholder')
  {
    return $cache[$image_id] = null;
  }

  $root_path = '';
+  $root_found = false;
  $roots = isset($config['roots']) && is_array($config['roots']) ? $config['roots'] : array();
  foreach ($roots as $root)
  {
    if ((int)($root['fileid'] ?? 0) === $root_fileid)
    {
      $root_path = trim((string)($root['webdav_path'] ?? ''), '/');
+      $root_found = true;
      break;
    }
  }
-  if ($root_path === '') return $cache[$image_id] = null;
+  if (!$root_found) return $cache[$image_id] = null;

-  $webdav_path = $root_path.'/'.$relative_path;
+  $root_is_base = $root_path === '';
+  $webdav_path = $root_is_base ? $relative_path : $root_path.'/'.$relative_path;
  $content_type = '';
  $size = 0;
  $etag = '';

-  $state_dir = rtrim((string)($config['state_dir'] ?? ''), '/');
-  if ($state_dir !== '')
+  if (!array_key_exists($connection_id, $mapping_cache))
  {
-    $mapping_file = $state_dir.'/webdav-map.json';
-    if (is_readable($mapping_file))
+    $mapping_cache[$connection_id] = array();
+    $state_dir = rtrim((string)($config['state_dir'] ?? ''), '/');
+    if ($state_dir !== '')
    {
-      $mapping = json_decode((string)file_get_contents($mapping_file), true);
-      if (is_array($mapping) && isset($mapping['files']) && is_array($mapping['files']))
+      $mapping_file = $state_dir.'/webdav-map.json';
+      if (is_readable($mapping_file))
      {
-        $entry = $mapping['files'][$resolved] ?? $mapping['files'][$normalized] ?? null;
-        if (is_array($entry) && (string)($entry['kind'] ?? '') === 'file')
+        $mapping = json_decode((string)file_get_contents($mapping_file), true);
+        if (is_array($mapping) && isset($mapping['files']) && is_array($mapping['files']))
        {
-          $webdav_path = trim((string)($entry['webdav_path'] ?? $webdav_path), '/');
-          $content_type = (string)($entry['content_type'] ?? '');
-          $size = (int)($entry['size'] ?? 0);
-          $etag = (string)($entry['etag'] ?? '');
+          $mapping_cache[$connection_id] = $mapping['files'];
        }
      }
    }
  }

+  $entry = $mapping_cache[$connection_id][$resolved] ?? $mapping_cache[$connection_id][$normalized] ?? null;
+  if (is_array($entry) && (string)($entry['kind'] ?? '') === 'file')
+  {
+    $webdav_path = trim((string)($entry['webdav_path'] ?? $webdav_path), '/');
+    $content_type = (string)($entry['content_type'] ?? '');
+    $size = (int)($entry['size'] ?? 0);
+    $etag = (string)($entry['etag'] ?? '');
+  }
+
  return $cache[$image_id] = array(
    'image_id'=>$image_id,
    'connection_id'=>$connection_id,
    'webdav_path'=>$webdav_path,
+    'root_is_base'=>$root_is_base,
    'content_type'=>$content_type,
    'size'=>$size,
    'etag'=>$etag,
@@ -412,8 +437,16 @@ function bratonien_tools_filter_webdav_src_url($url, $src_image)
 function bratonien_tools_filter_webdav_derivative_url($url, $params, $src_image, $rel_url)
 {
  if (!is_object($src_image) || empty($src_image->id)) return $url;
-  $info = bratonien_tools_webdav_image_source_info((int)$src_image->id);
-  if (!$info) return $url;
+
+  // Hotpath: Bei einem bereits vorbereiteten WebDAV-Derivat keinerlei
+  // Connection-DB oder Mapping-Datei mehr anfassen. Der reale Quellpfad
+  // reicht aus, um Connector-Bilder sicher zu erkennen.
+  $source_path = $src_image->get_path();
+  $resolved_source = $source_path !== '' ? realpath($source_path) : false;
+  if ($resolved_source === false || !preg_match('#/nc-webdav-source/connection-[0-9]+/root-[0-9]+/#', str_replace('\\\\', '/', $resolved_source)))
+  {
+    return $url;
+  }

  try
  {
--- a/js/admin_tabs.js
+++ b/js/admin_tabs.js
@@ -1,94 +1,6 @@
 (function () {
  'use strict';

-  function initNcRouteStatus() {
-    var section = document.getElementById('nc-connector');
-    if (!section) return;
-
-    var statusCard = section.querySelector('.bratonien-grid .bratonien-card');
-    if (!statusCard) return;
-
-    var grid = statusCard.querySelector('.bratonien-form-grid');
-    if (!grid) return;
-
-    var routeLabel = document.createElement('span');
-    routeLabel.className = 'bratonien-label';
-    routeLabel.textContent = 'Aktiver Datenweg';
-
-    var routeValue = document.createElement('strong');
-    routeValue.setAttribute('data-nc-route-status', '');
-    routeValue.textContent = 'Noch kein Lauf erfasst';
-
-    var routeTimeLabel = document.createElement('span');
-    routeTimeLabel.className = 'bratonien-label';
-    routeTimeLabel.textContent = 'Datenweg zuletzt';
-
-    var routeTimeValue = document.createElement('strong');
-    routeTimeValue.setAttribute('data-nc-route-time', '');
-    routeTimeValue.textContent = 'Nicht verfügbar';
-
-    grid.appendChild(routeLabel);
-    grid.appendChild(routeValue);
-    grid.appendChild(routeTimeLabel);
-    grid.appendChild(routeTimeValue);
-
-    var detail = document.createElement('p');
-    detail.className = 'bratonien-base-note';
-    detail.setAttribute('data-nc-route-detail', '');
-    detail.textContent = 'Der Datenweg wird nach dem nächsten Connector-Lauf angezeigt.';
-    statusCard.appendChild(detail);
-
-    var basePath = window.location.pathname.replace(/admin\.php.*$/, '');
-    var statusUrl = basePath + '_data/bratonien-tools/nc-connector-status/route-status.json';
-
-    function formatTime(timestamp) {
-      if (!timestamp) return 'Nicht verfügbar';
-      var date = new Date(Number(timestamp) * 1000);
-      if (Number.isNaN(date.getTime())) return 'Nicht verfügbar';
-      return date.toLocaleString('de-DE');
-    }
-
-    function render(data) {
-      var label = data && data.label ? String(data.label) : 'Unbekannt';
-      var route = data && data.route ? String(data.route) : '';
-      routeValue.textContent = label;
-      routeTimeValue.textContent = formatTime(data && data.timestamp);
-
-      if (route === 'webdav') {
-        routeValue.textContent = 'WEBDAV PRIMÄR';
-        detail.textContent = 'Portierung läuft über WebDAV. Legacy wurde in diesem Lauf nicht benutzt.';
-      } else if (route === 'legacy_fallback') {
-        routeValue.textContent = 'LEGACY-FALLBACK AKTIV';
-        detail.textContent = 'WebDAV war nicht erfolgreich. Dieser Lauf wurde über die alte Struktur abgefangen.';
-      } else if (route === 'failed') {
-        routeValue.textContent = 'FEHLER - KEIN ERFOLGREICHER DATENWEG';
-        detail.textContent = data && data.detail ? String(data.detail) : 'WebDAV und Fallback sind fehlgeschlagen.';
-      } else {
-        detail.textContent = data && data.detail ? String(data.detail) : 'Unbekannter Datenweg.';
-      }
-    }
-
-    function refresh() {
-      fetch(statusUrl + '?t=' + Date.now(), {
-        cache: 'no-store',
-        credentials: 'same-origin'
-      })
-        .then(function (response) {
-          if (!response.ok) throw new Error('status unavailable');
-          return response.json();
-        })
-        .then(render)
-        .catch(function () {
-          routeValue.textContent = 'Noch kein Lauf erfasst';
-          routeTimeValue.textContent = 'Nicht verfügbar';
-          detail.textContent = 'Nach dem nächsten Connector-Lauf wird hier WebDAV oder Legacy-Fallback angezeigt.';
-        });
-    }
-
-    refresh();
-    window.setInterval(refresh, 10000);
-  }
-
  function initBratonienTabs() {
    var admin = document.querySelector('.bratonien-admin');
    if (!admin) return;
@@ -201,14 +113,9 @@
    activate(initial, false);
  }

-  function init() {
-    initBratonienTabs();
-    initNcRouteStatus();
-  }
-
  if (document.readyState === 'loading') {
-    document.addEventListener('DOMContentLoaded', init);
+    document.addEventListener('DOMContentLoaded', initBratonienTabs);
  } else {
-    init();
+    initBratonienTabs();
  }
 })();
--- a/js/nc_connector_edit_v2.js
+++ b/js/nc_connector_edit_v2.js
@@ -1,236 +1,6 @@
 (function () {
  'use strict';
-
-  function ready(callback) {
-    if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', callback);
-    else callback();
-  }
-
-  ready(function () {
-    var section = document.getElementById('nc-connector');
-    if (!section) return;
-
-    var tokenInput = section.querySelector('input[name="pwg_token"]');
-    var pwgToken = tokenInput ? tokenInput.value : '';
-
-    var technicalButton = document.getElementById('bratonien-nc-technical-open');
-    if (technicalButton) technicalButton.remove();
-    var technicalCreate = document.getElementById('bratonien-nc-technical-create');
-    if (technicalCreate) technicalCreate.remove();
-
-    var statusHeading = Array.prototype.find.call(section.querySelectorAll('h4'), function (heading) {
-      return heading.textContent.trim() === 'Status';
-    });
-    var statusCard = statusHeading ? statusHeading.closest('.bratonien-card') : null;
-    if (statusCard && pwgToken && !statusCard.querySelector('[data-nc-run-now]')) {
-      var runForm = document.createElement('form');
-      runForm.method = 'post';
-      runForm.className = 'bratonien-actions';
-      runForm.style.marginTop = '1rem';
-      runForm.setAttribute('data-nc-run-now', '1');
-      runForm.innerHTML = '<input type="hidden" name="pwg_token" value="'+escapeHtml(pwgToken)+'">'
-        + '<button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_run_now">Jetzt abgleichen</button>';
-      runForm.addEventListener('submit', function () {
-        var button = runForm.querySelector('button');
-        if (button) {
-          button.disabled = true;
-          button.textContent = 'Abgleich wird gestartet …';
-        }
-      });
-      statusCard.appendChild(runForm);
-    }
-
-    function escapeHtml(value) {
-      return String(value == null ? '' : value).replace(/[&<>"']/g, function (c) {
-        return {'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#039;'}[c];
-      });
-    }
-
-    function loadConnection(id) {
-      return fetch('plugins/bratonien_tools/nc-connector-edit-data.php?connection_id='+encodeURIComponent(id)+'&_='+Date.now(), {
-        credentials:'same-origin', cache:'no-store', headers:{'Accept':'application/json'}
-      }).then(function (response) {
-        return response.json().then(function (data) {
-          if (!response.ok) throw new Error(data.error || ('HTTP '+response.status));
-          return data;
-        });
-      });
-    }
-
-    function createPostForm(label, tool, id) {
-      var form = document.createElement('form');
-      form.method = 'post';
-      form.style.display = 'inline';
-      form.innerHTML = '<input type="hidden" name="pwg_token" value="'+escapeHtml(pwgToken)+'">'
-        + '<input type="hidden" name="connection_id" value="'+escapeHtml(id)+'">'
-        + '<button class="buttonLike" type="submit" name="bratonien_tool" value="'+escapeHtml(tool)+'">'+escapeHtml(label)+'</button>';
-      return form;
-    }
-
-    function dialog() {
-      var node = document.getElementById('bratonien-nc-connection-edit-v2');
-      if (node) return node;
-      node = document.createElement('dialog');
-      node.id = 'bratonien-nc-connection-edit-v2';
-      node.className = 'bratonien-edit-dialog';
-      node.innerHTML = '<div class="bratonien-edit-dialog__body">'
-        + '<div style="display:flex;align-items:flex-start;justify-content:space-between;gap:1rem">'
-        + '<div><h4 style="margin:0">Verbindung bearbeiten</h4><p class="bratonien-base-note" style="margin:.35rem 0 0">Die Einstellungen gelten nur für diese Verbindung.</p></div>'
-        + '<button type="button" class="buttonLike" data-edit-close>Schließen</button></div>'
-        + '<div data-edit-content style="margin-top:1rem"></div></div>';
-      document.body.appendChild(node);
-      node.querySelector('[data-edit-close]').addEventListener('click', function () { node.close(); });
-      node.addEventListener('click', function (event) { if (event.target === node) node.close(); });
-      return node;
-    }
-
-    function storageRow(storage) {
-      storage = storage || {};
-      return '<div class="bratonien-storage-row" data-storage-row>'
-        + '<label>Storage-ID<input name="nc_storage_id[]" value="'+escapeHtml(storage.storage_id || '')+'" required></label>'
-        + '<label>Quellordner<input name="nc_source_prefix[]" value="'+escapeHtml(storage.source_prefix || '')+'" placeholder="optional"></label>'
-        + '<label>Lokaler Speicherpfad<input name="nc_local_mount[]" value="'+escapeHtml(storage.local_mount || '')+'" required></label>'
-        + '<button type="button" class="buttonLike" data-remove-storage>Entfernen</button></div>';
-    }
-
-    function showError(form, data) {
-      var old = form.querySelector('[data-edit-error]');
-      if (old) old.remove();
-      var box = document.createElement('div');
-      box.dataset.editError = '1';
-      box.className = 'bratonien-main-cache__warning';
-      box.style.margin = '0 0 1rem';
-      box.textContent = (data && data.message) ? data.message : 'Die Verbindung konnte nicht gespeichert werden.';
-      form.insertBefore(box, form.firstChild);
-    }
-
-    function submitLocal(form, editDialog) {
-      if (!form.reportValidity()) return;
-      var button = form.querySelector('button[type="submit"]');
-      if (button) button.disabled = true;
-      fetch('plugins/bratonien_tools/nc-connector-edit-save.php', {
-        method:'POST', credentials:'same-origin', cache:'no-store', headers:{'Accept':'application/json'}, body:new FormData(form)
-      }).then(function (response) {
-        return response.json().then(function (data) {
-          if (!response.ok || !data.ok) { showError(form, data); return; }
-          editDialog.close();
-          window.location.reload();
-        });
-      }).catch(function (error) {
-        showError(form, {message:error.message || String(error)});
-      }).finally(function () {
-        if (button) button.disabled = false;
-      });
-    }
-
-    function openLocalEditor(id) {
-      var editDialog = dialog();
-      var content = editDialog.querySelector('[data-edit-content]');
-      content.innerHTML = '<p class="bratonien-base-note">Verbindung wird geladen …</p>';
-      if (typeof editDialog.showModal === 'function') editDialog.showModal();
-      else editDialog.setAttribute('open', 'open');
-
-      loadConnection(id).then(function (data) {
-        if (data.adapter !== 'local') throw new Error('Diese Verbindung wird über den WebDAV-Assistenten bearbeitet.');
-        var legacy = data.legacy || {};
-        var webdav = data.webdav || {};
-        var storages = Array.isArray(legacy.storages) ? legacy.storages : [];
-        var rows = storages.map(storageRow).join('') || storageRow({});
-
-        content.innerHTML = '<form method="post" data-edit-form>'
-          + '<input type="hidden" name="pwg_token" value="'+escapeHtml(pwgToken)+'">'
-          + '<input type="hidden" name="connection_id" value="'+escapeHtml(data.id)+'">'
-          + '<h5>Verbindung</h5><div class="bratonien-form-grid">'
-          + '<label class="bratonien-label">Name</label><input name="connection_name" value="'+escapeHtml(data.name)+'" required>'
-          + '</div>'
-          + '<h5 style="margin-top:1.2rem">Nextcloud</h5><div class="bratonien-form-grid">'
-          + '<label class="bratonien-label">Nextcloud-Adresse</label><input name="nc_nextcloud_url" value="'+escapeHtml(webdav.nextcloud_url || '')+'">'
-          + '<label class="bratonien-label">Nextcloud-Benutzer</label><input name="nc_nextcloud_user" value="'+escapeHtml(webdav.nextcloud_user || '')+'" autocomplete="username">'
-          + '<label class="bratonien-label">Nextcloud-Passwort</label><input name="nc_nextcloud_password" type="password" autocomplete="current-password" placeholder="'+(webdav.has_nextcloud_password ? 'gespeichert – leer = unverändert' : 'noch nicht gespeichert')+'">'
-          + '</div>'
-          + '<h5 style="margin-top:1.2rem">Piwigo-Zugang</h5><div class="bratonien-form-grid">'
-          + '<label class="bratonien-label">API-Schlüssel-ID</label><input name="nc_connection_api_key_id" value="'+escapeHtml(webdav.api_key_id || '')+'" autocomplete="off">'
-          + '<label class="bratonien-label">API-Geheimnis</label><input name="nc_connection_api_key_secret" type="password" autocomplete="new-password" placeholder="'+(webdav.has_api_key_secret ? 'gespeichert – leer = unverändert' : 'noch nicht gespeichert')+'">'
-          + '<label class="bratonien-label">Fallback-Benutzer</label><input name="nc_fallback_user" value="'+escapeHtml(webdav.fallback_user || '')+'" autocomplete="username">'
-          + '<label class="bratonien-label">Fallback-Passwort</label><input name="nc_fallback_password" type="password" autocomplete="current-password" placeholder="'+(webdav.has_fallback_password ? 'gespeichert – leer = unverändert' : 'noch nicht gespeichert')+'">'
-          + '</div>'
-          + '<h5 style="margin-top:1.2rem">Lokaler Connector</h5><div class="bratonien-form-grid">'
-          + '<label class="bratonien-label">Datenbank-Server</label><input name="nc_host" value="'+escapeHtml(legacy.host)+'" required>'
-          + '<label class="bratonien-label">Port</label><input name="nc_port" type="number" min="1" max="65535" value="'+escapeHtml(legacy.port || 5432)+'" required>'
-          + '<label class="bratonien-label">Datenbank</label><input name="nc_database" value="'+escapeHtml(legacy.database)+'" required>'
-          + '<label class="bratonien-label">Reader-Benutzer</label><input name="nc_user" value="'+escapeHtml(legacy.user)+'" required>'
-          + '<label class="bratonien-label">Reader-Passwort</label><input name="nc_db_password" type="password" autocomplete="new-password" placeholder="'+(legacy.has_db_password ? 'gespeichert – leer = unverändert' : 'noch nicht gespeichert')+'">'
-          + '</div>'
-          + '<h5 style="margin-top:1.2rem">Speicherorte</h5><div data-storage-list>'+rows+'</div>'
-          + '<button type="button" class="buttonLike" data-add-storage>Speicherort hinzufügen</button>'
-          + '<details style="margin-top:1rem"><summary>Erweiterte Einstellungen</summary><div class="bratonien-form-grid" style="margin-top:.75rem">'
-          + '<label class="bratonien-label">Source-View</label><input name="nc_source_view" value="'+escapeHtml(legacy.source_view)+'" required>'
-          + '<label class="bratonien-label">Activity-View</label><input name="nc_activity_view" value="'+escapeHtml(legacy.activity_view)+'" required>'
-          + '<label class="bratonien-label">Piwigo-Galerieordner</label><input name="nc_gallery_root" value="'+escapeHtml(legacy.gallery_root)+'" required>'
-          + '<label class="bratonien-label">Ruhezeit (Sek.)</label><input name="nc_quiet_seconds" type="number" min="0" value="'+escapeHtml(legacy.quiet_seconds)+'">'
-          + '<label class="bratonien-label">Maximale Wartezeit (Sek.)</label><input name="nc_max_wait_seconds" type="number" min="60" value="'+escapeHtml(legacy.max_wait_seconds)+'">'
-          + '<label class="bratonien-label">Vollprüfung nach (Sek.)</label><input name="nc_full_sync_seconds" type="number" min="300" value="'+escapeHtml(legacy.full_sync_seconds)+'">'
-          + '</div></details>'
-          + '<div class="bratonien-actions" style="margin-top:1rem"><button class="buttonLike" type="submit">Änderungen prüfen und speichern</button><button class="buttonLike" type="button" data-cancel>Abbrechen</button></div>'
-          + '</form>';
-
-        var form = content.querySelector('[data-edit-form]');
-        form.querySelector('[data-cancel]').addEventListener('click', function () { editDialog.close(); });
-        form.querySelector('[data-add-storage]').addEventListener('click', function () {
-          form.querySelector('[data-storage-list]').insertAdjacentHTML('beforeend', storageRow({}));
-        });
-        form.addEventListener('click', function (event) {
-          var remove = event.target.closest('[data-remove-storage]');
-          if (remove) {
-            var row = remove.closest('[data-storage-row]');
-            if (row) row.remove();
-          }
-        });
-        form.addEventListener('submit', function (event) {
-          event.preventDefault();
-          submitLocal(form, editDialog);
-        });
-      }).catch(function (error) {
-        content.innerHTML = '<p class="bratonien-main-cache__warning"><strong>Bearbeiten nicht möglich:</strong> '+escapeHtml(error.message || String(error))+'</p>';
-      });
-    }
-
-    [].slice.call(section.querySelectorAll('button[value="nc_connector_edit_start"]')).forEach(function (button) {
-      var form = button.closest('form');
-      if (form) form.remove();
-    });
-
-    [].slice.call(section.querySelectorAll('button[value="nc_connector_migrate_start"]')).forEach(function (button) {
-      var form = button.closest('form');
-      if (form) form.remove();
-    });
-
-    [].slice.call(section.querySelectorAll('button[value="nc_connector_delete"]')).forEach(function (deleteButton) {
-      var deleteForm = deleteButton.closest('form');
-      if (!deleteForm || !deleteForm.parentElement) return;
-      var idInput = deleteForm.querySelector('input[name="connection_id"]');
-      if (!idInput) return;
-      var id = idInput.value;
-      var actions = deleteForm.parentElement;
-
-      loadConnection(id).then(function (data) {
-        var edit;
-        if (data.adapter === 'local') {
-          edit = document.createElement('button');
-          edit.type = 'button';
-          edit.className = 'buttonLike';
-          edit.textContent = 'Bearbeiten';
-          edit.addEventListener('click', function () { openLocalEditor(id); });
-        } else {
-          edit = createPostForm('Bearbeiten', 'nc_connector_edit_start', id);
-        }
-        actions.insertBefore(edit, deleteForm);
-      }).catch(function (error) {
-        var info = document.createElement('span');
-        info.className = 'bratonien-main-cache__warning';
-        info.textContent = 'Verbindung konnte nicht geladen werden: '+(error.message || String(error));
-        actions.insertBefore(info, deleteForm);
-      });
-    });
-  });
+  // 0.9.7.18: Die parallele AJAX-Editor-Schicht ist absichtlich deaktiviert.
+  // Der NC Connector benutzt wieder ausschliesslich die vorhandenen
+  // Piwigo-Formulare, die Tool-Registry und den WebDAV-Wizard.
 })();
--- a/main.inc.php
+++ b/main.inc.php
@@ -1,7 +1,7 @@
 <?php
 /*
 Plugin Name: Bratonien Tools
-Version: 0.9.6.29
+Version: 0.9.7.18
 Description: Erweiterbare Administrationswerkzeuge fuer die Bratonien-Piwigo-Installation.
 Plugin URI: https://github.com/Terranom674/Piwigo_Bratonien_Tools
 Author: Bratonien
@@ -24,11 +24,11 @@ require_once(BRATONIEN_TOOLS_PATH . 'include/album_shares.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_ws.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/nc_orphan_ws.inc.php');
 require_once(BRATONIEN_TOOLS_PATH . 'include/nc_productive_ws.inc.php');
+require_once(BRATONIEN_TOOLS_PATH . 'include/nc_connector_scheduler.inc.php');

 add_event_handler('get_admin_plugin_menu_links', 'bratonien_tools_admin_menu');
 add_event_handler('get_derivative_url', 'bratonien_tools_filter_derivative_url', EVENT_HANDLER_PRIORITY_NEUTRAL, 4);
 add_event_handler('get_src_image_url', 'bratonien_tools_filter_webdav_src_url', EVENT_HANDLER_PRIORITY_NEUTRAL + 50, 2);
-add_event_handler('get_derivative_url', 'bratonien_tools_filter_webdav_derivative_url', EVENT_HANDLER_PRIORITY_NEUTRAL + 50, 4);
 add_event_handler('loc_end_element_set_global', 'bratonien_tools_batch_titles_register_action');
 add_event_handler('element_set_global_action', 'bratonien_tools_batch_titles_apply', EVENT_HANDLER_PRIORITY_NEUTRAL, 2);
 add_event_handler('init', 'bratonien_tools_prepare_connector_private_import', EVENT_HANDLER_PRIORITY_NEUTRAL - 30);
--- a/maintain.class.php
+++ b/maintain.class.php
@@ -8,6 +8,7 @@ require_once(dirname(__FILE__) . '/include/album_shares.inc.php');
 require_once(dirname(__FILE__) . '/include/database.class.php');
 require_once(dirname(__FILE__) . '/tools/watermark_profiles.inc.php');
 require_once(dirname(__FILE__) . '/include/dependencies.inc.php');
+require_once(dirname(__FILE__) . '/include/nc_connector_scheduler.inc.php');

 class bratonien_tools_maintain extends PluginMaintain
 {
@@ -18,9 +19,14 @@ class bratonien_tools_maintain extends PluginMaintain

    $dependency_messages = array();
    bratonien_tools_ensure_dependencies($dependency_messages);
+    if (!bratonien_tools_nc_scheduler_install())
+    {
+      $dependency_messages[] = 'Der native NC-Scheduler konnte sein Piwigo-Laufzeitverzeichnis nicht anlegen.';
+    }

    if (function_exists('conf_update_param'))
    {
+      conf_update_param('bratonien_nc_scheduler_interval', 60);
      conf_update_param('bratonien_dependency_status', json_encode(array(
        'checked_at' => time(),
        'messages' => $dependency_messages,
--- a/nc-connector-edit-data.php
+++ b/nc-connector-edit-data.php
@@ -1,93 +0,0 @@
-<?php
-$piwigo_root = realpath(dirname(__DIR__, 2));
-if ($piwigo_root === false)
-{
-  http_response_code(500);
-  exit;
-}
-define('PHPWG_ROOT_PATH', rtrim($piwigo_root, DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR);
-include_once(PHPWG_ROOT_PATH.'include/common.inc.php');
-
-header('Content-Type: application/json; charset=utf-8');
-header('Cache-Control: no-store, max-age=0');
-
-if (!defined('BRATONIEN_TOOLS_PATH'))
-{
-  http_response_code(404);
-  echo json_encode(array('error'=>'Bratonien Tools ist nicht aktiv.'));
-  exit;
-}
-if (!function_exists('is_admin') || !is_admin())
-{
-  http_response_code(403);
-  echo json_encode(array('error'=>'Administratorrechte erforderlich.'));
-  exit;
-}
-
-require_once(BRATONIEN_TOOLS_PATH.'include/nc_connector.inc.php');
-require_once(BRATONIEN_TOOLS_PATH.'include/nc_connector_manage.inc.php');
-require_once(BRATONIEN_TOOLS_PATH.'include/nc_connector_connection_scope.inc.php');
-
-$id = (int)($_GET['connection_id'] ?? 0);
-$connection = bratonien_tools_nc_connector_connection($id, true);
-if (!$connection)
-{
-  http_response_code(404);
-  echo json_encode(array('error'=>'Connector-Verbindung wurde nicht gefunden.'));
-  exit;
-}
-
-$config = isset($connection['config']) && is_array($connection['config']) ? $connection['config'] : array();
-$credentials = array();
-try
-{
-  $credentials = bratonien_tools_nc_connector_scoped_secret($connection);
-}
-catch (Throwable $e)
-{
-  $credentials = array();
-}
-
-$storages = array();
-foreach ((array)($config['storages'] ?? array()) as $storage)
-{
-  $storages[] = array(
-    'storage_id'=>(string)($storage['storage_id'] ?? ''),
-    'source_prefix'=>(string)($storage['source_prefix'] ?? ''),
-    'local_mount'=>(string)($storage['local_mount'] ?? ''),
-  );
-}
-
-$payload = array(
-  'id'=>(int)$connection['id'],
-  'name'=>(string)$connection['name'],
-  'adapter'=>(string)$connection['adapter'],
-  'enabled'=>(bool)$connection['enabled'],
-  'takeover_state'=>(string)$connection['takeover_state'],
-  'source_mode'=>(string)($config['source_mode'] ?? ''),
-  'legacy'=>array(
-    'host'=>(string)($config['host'] ?? ''),
-    'port'=>(string)($config['port'] ?? '5432'),
-    'database'=>(string)($config['database'] ?? ''),
-    'user'=>(string)($config['user'] ?? ''),
-    'has_db_password'=>trim((string)($credentials['db_password'] ?? '')) !== '',
-    'source_view'=>(string)($config['source_view'] ?? ''),
-    'activity_view'=>(string)($config['activity_view'] ?? ''),
-    'gallery_root'=>(string)($config['gallery_root'] ?? ''),
-    'quiet_seconds'=>(int)($config['quiet_seconds'] ?? 120),
-    'max_wait_seconds'=>(int)($config['max_wait_seconds'] ?? 900),
-    'full_sync_seconds'=>(int)($config['full_sync_seconds'] ?? 86400),
-    'storages'=>$storages,
-  ),
-  'webdav'=>array(
-    'nextcloud_url'=>(string)($config['nextcloud_url'] ?? ''),
-    'nextcloud_user'=>(string)($credentials['nextcloud_user'] ?? $config['nextcloud_access_user'] ?? $config['access_user'] ?? ''),
-    'has_nextcloud_password'=>(string)($credentials['nextcloud_password'] ?? '') !== '',
-    'api_key_id'=>(string)($credentials['api_key_id'] ?? ''),
-    'has_api_key_secret'=>trim((string)($credentials['api_key_secret'] ?? '')) !== '',
-    'fallback_user'=>(string)($credentials['piwigo_user'] ?? ''),
-    'has_fallback_password'=>(string)($credentials['piwigo_password'] ?? '') !== '',
-  ),
-);
-
-echo json_encode($payload, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
--- a/nc-connector-edit-save.php
+++ b/nc-connector-edit-save.php
@@ -1,356 +0,0 @@
-<?php
-$piwigo_root = realpath(dirname(__DIR__, 2));
-if ($piwigo_root === false)
-{
-  http_response_code(500);
-  exit;
-}
-define('PHPWG_ROOT_PATH', rtrim($piwigo_root, DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR);
-include_once(PHPWG_ROOT_PATH.'include/common.inc.php');
-
-header('Content-Type: application/json; charset=utf-8');
-header('Cache-Control: no-store, max-age=0');
-
-function bratonien_tools_nc_edit_json($status, array $payload)
-{
-  http_response_code((int)$status);
-  echo json_encode($payload, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
-  exit;
-}
-
-function bratonien_tools_nc_edit_fail($message, array $fields = array(), $stage = '', $detail = '')
-{
-  $visible = trim((string)$message);
-  if ($stage !== '') $visible = 'Bereich: '.$stage.' — '.$visible;
-  if ($detail !== '') $visible .= ' Technische Ursache: '.$detail;
-
-  bratonien_tools_nc_edit_json(422, array(
-    'ok'=>false,
-    'message'=>$visible,
-    'stage'=>(string)$stage,
-    'detail'=>(string)$detail,
-    'fields'=>array_values(array_unique($fields)),
-  ));
-}
-
-function bratonien_tools_nc_edit_probe($url, $username = '', $password = '', array $headers = array())
-{
-  if (!function_exists('curl_init'))
-  {
-    return array('ok'=>false, 'http'=>0, 'errno'=>-1, 'error'=>'cURL ist in PHP nicht verfügbar.', 'body'=>'');
-  }
-
-  $ch = curl_init($url);
-  $options = array(
-    CURLOPT_RETURNTRANSFER=>true,
-    CURLOPT_FOLLOWLOCATION=>true,
-    CURLOPT_MAXREDIRS=>3,
-    CURLOPT_CONNECTTIMEOUT=>8,
-    CURLOPT_TIMEOUT=>15,
-    CURLOPT_HTTPHEADER=>array_merge(array('Accept: application/json'), $headers),
-    CURLOPT_USERAGENT=>'Bratonien-Tools-NC-Editor/'.(function_exists('bratonien_tools_current_version') ? bratonien_tools_current_version() : 'dev'),
-  );
-  if ($username !== '')
-  {
-    $options[CURLOPT_HTTPAUTH] = CURLAUTH_BASIC;
-    $options[CURLOPT_USERPWD] = $username.':'.$password;
-  }
-  curl_setopt_array($ch, $options);
-  $body = curl_exec($ch);
-  $errno = curl_errno($ch);
-  $error = curl_error($ch);
-  $http = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
-  curl_close($ch);
-
-  return array(
-    'ok'=>$body !== false && $errno === 0,
-    'http'=>$http,
-    'errno'=>$errno,
-    'error'=>$error,
-    'body'=>$body === false ? '' : (string)$body,
-  );
-}
-
-if (!defined('BRATONIEN_TOOLS_PATH'))
-{
-  bratonien_tools_nc_edit_json(404, array('ok'=>false, 'message'=>'Bratonien Tools ist nicht aktiv.', 'fields'=>array()));
-}
-if (!function_exists('is_admin') || !is_admin())
-{
-  bratonien_tools_nc_edit_json(403, array('ok'=>false, 'message'=>'Administratorrechte erforderlich.', 'fields'=>array()));
-}
-if (($_SERVER['REQUEST_METHOD'] ?? '') !== 'POST')
-{
-  bratonien_tools_nc_edit_json(405, array('ok'=>false, 'message'=>'Nur POST ist erlaubt.', 'fields'=>array()));
-}
-
-try
-{
-  check_pwg_token();
-  require_once(BRATONIEN_TOOLS_PATH.'include/tool_registry.inc.php');
-
-  $id = (int)($_POST['connection_id'] ?? 0);
-  $connection = bratonien_tools_nc_connector_connection($id, true);
-  if (!$connection)
-  {
-    bratonien_tools_nc_edit_fail('Die zu bearbeitende Verbindung wurde nicht gefunden.', array(), 'Verbindung');
-  }
-
-  $config = isset($connection['config']) && is_array($connection['config']) ? $connection['config'] : array();
-  $credentials = bratonien_tools_nc_connector_scoped_secret($connection);
-
-  $nextcloud_input = trim((string)($_POST['nc_nextcloud_url'] ?? ($config['nextcloud_url'] ?? '')));
-  $nextcloud_user = trim((string)($_POST['nc_nextcloud_user'] ?? ($credentials['nextcloud_user'] ?? '')));
-  $submitted_nc_password = (string)($_POST['nc_nextcloud_password'] ?? '');
-  $nextcloud_password = $submitted_nc_password !== '' ? $submitted_nc_password : (string)($credentials['nextcloud_password'] ?? '');
-
-  $has_any_nextcloud = $nextcloud_input !== '' || $nextcloud_user !== '' || $nextcloud_password !== '';
-  if ($has_any_nextcloud)
-  {
-    $missing = array();
-    if ($nextcloud_input === '') $missing[] = 'nc_nextcloud_url';
-    if ($nextcloud_user === '') $missing[] = 'nc_nextcloud_user';
-    if ($nextcloud_password === '') $missing[] = 'nc_nextcloud_password';
-    if ($missing)
-    {
-      bratonien_tools_nc_edit_fail(
-        'Die WebDAV-Daten sind unvollständig. Adresse, Benutzer und Passwort werden gemeinsam benötigt.',
-        $missing,
-        'Nextcloud / WebDAV'
-      );
-    }
-
-    try
-    {
-      $candidate_urls = bratonien_tools_nc_wizard_candidate_urls($nextcloud_input);
-    }
-    catch (Throwable $e)
-    {
-      bratonien_tools_nc_edit_fail($e->getMessage(), array('nc_nextcloud_url'), 'Nextcloud / WebDAV');
-    }
-
-    $nextcloud_url = '';
-    $last_probe = null;
-    $last_status_url = '';
-    foreach ($candidate_urls as $candidate_url)
-    {
-      $status_url = $candidate_url.'/status.php';
-      $probe = bratonien_tools_nc_edit_probe($status_url);
-      $last_probe = $probe;
-      $last_status_url = $status_url;
-
-      if (!$probe['ok'] || $probe['http'] < 200 || $probe['http'] >= 300)
-      {
-        continue;
-      }
-
-      $status = json_decode($probe['body'], true);
-      if (!is_array($status) || empty($status['installed']))
-      {
-        continue;
-      }
-
-      $nextcloud_url = $candidate_url;
-      break;
-    }
-
-    if ($nextcloud_url === '')
-    {
-      $attempts = array();
-      foreach ($candidate_urls as $candidate_url)
-      {
-        $attempts[] = $candidate_url.'/status.php';
-      }
-      if (is_array($last_probe) && !$last_probe['ok'])
-      {
-        $technical = $last_probe['errno'] >= 0
-          ? 'cURL '.$last_probe['errno'].($last_probe['error'] !== '' ? ': '.$last_probe['error'] : '')
-          : $last_probe['error'];
-        bratonien_tools_nc_edit_fail(
-          'Die Nextcloud-Adresse ist vom Piwigo-Server aus nicht erreichbar. Ohne angegebenes Protokoll wurden HTTPS und HTTP geprüft.',
-          array('nc_nextcloud_url'),
-          'Nextcloud / WebDAV – Erreichbarkeit',
-          $technical.' · Geprüft: '.implode(' ; ', $attempts)
-        );
-      }
-
-      bratonien_tools_nc_edit_fail(
-        'Unter der angegebenen Adresse wurde keine erreichbare installierte Nextcloud gefunden. Ohne angegebenes Protokoll wurden HTTPS und HTTP geprüft.',
-        array('nc_nextcloud_url'),
-        'Nextcloud / WebDAV – Erkennung',
-        'Geprüft: '.implode(' ; ', $attempts).($last_probe ? ' · Letzter HTTP-Status: '.$last_probe['http'] : '')
-      );
-    }
-
-    $_POST['nc_nextcloud_url'] = $nextcloud_url;
-
-    $user_url = $nextcloud_url.'/ocs/v2.php/cloud/user?format=json';
-    $user_probe = bratonien_tools_nc_edit_probe($user_url, $nextcloud_user, $nextcloud_password, array('OCS-APIRequest: true'));
-    if (!$user_probe['ok'])
-    {
-      $technical = $user_probe['errno'] >= 0
-        ? 'cURL '.$user_probe['errno'].($user_probe['error'] !== '' ? ': '.$user_probe['error'] : '')
-        : $user_probe['error'];
-      bratonien_tools_nc_edit_fail(
-        'Die Nextcloud-Anmeldung konnte technisch nicht geprüft werden.',
-        array('nc_nextcloud_url','nc_nextcloud_user','nc_nextcloud_password'),
-        'Nextcloud / WebDAV – Anmeldung',
-        $technical.' · Ziel: '.$user_url
-      );
-    }
-    if ($user_probe['http'] === 401 || $user_probe['http'] === 403)
-    {
-      bratonien_tools_nc_edit_fail(
-        'Nextcloud hat Benutzername oder Passwort abgelehnt.',
-        array('nc_nextcloud_user','nc_nextcloud_password'),
-        'Nextcloud / WebDAV – Anmeldung',
-        'HTTP '.$user_probe['http']
-      );
-    }
-    if ($user_probe['http'] < 200 || $user_probe['http'] >= 300)
-    {
-      bratonien_tools_nc_edit_fail(
-        'Nextcloud ist erreichbar, aber die Benutzerprüfung wurde vom Server abgelehnt.',
-        array('nc_nextcloud_user','nc_nextcloud_password'),
-        'Nextcloud / WebDAV – Anmeldung',
-        'HTTP '.$user_probe['http'].' · Ziel: '.$user_url
-      );
-    }
-    try
-    {
-      bratonien_tools_nc_wizard_ocs_data($user_probe['body']);
-    }
-    catch (Throwable $e)
-    {
-      bratonien_tools_nc_edit_fail(
-        'Nextcloud antwortet auf die Benutzerprüfung, die Antwort ist aber nicht gültig: '.$e->getMessage(),
-        array('nc_nextcloud_user','nc_nextcloud_password'),
-        'Nextcloud / WebDAV – Anmeldung'
-      );
-    }
-  }
-
-  $api_key_id = trim((string)($_POST['nc_connection_api_key_id'] ?? ($credentials['api_key_id'] ?? '')));
-  $submitted_api_secret = trim((string)($_POST['nc_connection_api_key_secret'] ?? ''));
-  $api_key_secret = $submitted_api_secret !== '' ? $submitted_api_secret : trim((string)($credentials['api_key_secret'] ?? ''));
-  if (($api_key_id === '') !== ($api_key_secret === ''))
-  {
-    $missing = $api_key_id === '' ? array('nc_connection_api_key_id') : array('nc_connection_api_key_secret');
-    bratonien_tools_nc_edit_fail(
-      'API-Schlüssel-ID und API-Geheimnis müssen gemeinsam vollständig sein.',
-      $missing,
-      'Piwigo API'
-    );
-  }
-  if ($api_key_id !== '')
-  {
-    try
-    {
-      bratonien_tools_nc_connector_validate_scoped_api($api_key_id, $api_key_secret);
-    }
-    catch (Throwable $e)
-    {
-      bratonien_tools_nc_edit_fail(
-        'Der Piwigo-API-Zugang konnte nicht bestätigt werden: '.$e->getMessage(),
-        array('nc_connection_api_key_id','nc_connection_api_key_secret'),
-        'Piwigo API'
-      );
-    }
-  }
-
-  $fallback_user = trim((string)($_POST['nc_fallback_user'] ?? ($credentials['piwigo_user'] ?? '')));
-  $submitted_fallback_password = (string)($_POST['nc_fallback_password'] ?? '');
-  $fallback_password = $submitted_fallback_password !== '' ? $submitted_fallback_password : (string)($credentials['piwigo_password'] ?? '');
-  if (($fallback_user === '') !== ($fallback_password === ''))
-  {
-    bratonien_tools_nc_edit_fail(
-      'Fallback-Benutzer und Fallback-Passwort müssen gemeinsam vollständig sein.',
-      array('nc_fallback_user','nc_fallback_password'),
-      'Piwigo-Fallback'
-    );
-  }
-  if ($fallback_user !== '')
-  {
-    try
-    {
-      bratonien_tools_nc_connector_validate_fallback_credentials($fallback_user, $fallback_password);
-    }
-    catch (Throwable $e)
-    {
-      bratonien_tools_nc_edit_fail(
-        'Der Piwigo-Fallback wurde abgelehnt: '.$e->getMessage(),
-        array('nc_fallback_user','nc_fallback_password'),
-        'Piwigo-Fallback'
-      );
-    }
-  }
-
-  $result = bratonien_tools_nc_connector_update_local_friendly();
-
-  if (array_key_exists('nc_fallback_user', $_POST) || array_key_exists('nc_fallback_password', $_POST))
-  {
-    $updated = bratonien_tools_nc_connector_connection($id, true);
-    if (!$updated) throw new RuntimeException('Die Verbindung konnte nach dem Speichern nicht erneut geladen werden.');
-    $updated_credentials = bratonien_tools_nc_connector_scoped_secret($updated);
-    $updated_credentials['piwigo_user'] = $fallback_user;
-    $updated_credentials['piwigo_password'] = $fallback_password;
-    bratonien_tools_nc_connector_store_scoped_secret($id, $updated, $updated_credentials);
-  }
-
-  bratonien_tools_nc_edit_json(200, array(
-    'ok'=>true,
-    'message'=>(string)($result['message'] ?? 'Verbindung wurde gespeichert.'),
-    'fields'=>array(),
-  ));
-}
-catch (Throwable $e)
-{
-  $message = trim($e->getMessage());
-  if ($message === '') $message = 'Die Verbindung konnte nicht gespeichert werden.';
-
-  $fields = array();
-  $stage = 'Verbindung';
-  $add = function($name) use (&$fields)
-  {
-    if (!in_array($name, $fields, true)) $fields[] = $name;
-  };
-
-  if (stripos($message, 'Name') !== false && stripos($message, 'Datenbankname') === false) $add('connection_name');
-  if (stripos($message, 'Datenbank-Server') !== false) { $add('nc_host'); $stage = 'Legacy-Datenbank'; }
-  if (stripos($message, 'Datenbank-Port') !== false) { $add('nc_port'); $stage = 'Legacy-Datenbank'; }
-  if (stripos($message, 'Datenbankname') !== false) { $add('nc_database'); $stage = 'Legacy-Datenbank'; }
-  if (stripos($message, 'Reader-Benutzer') !== false) { $add('nc_user'); $stage = 'Legacy-Datenbank'; }
-  if (stripos($message, 'Datenbankpasswort') !== false) { $add('nc_db_password'); $stage = 'Legacy-Datenbank'; }
-  if (stripos($message, 'Storage-ID') !== false) { $add('nc_storage_id[]'); $stage = 'Speicherorte'; }
-  if (stripos($message, 'lokaler Pfad') !== false || stripos($message, 'Speicherort') !== false) { $add('nc_local_mount[]'); $stage = 'Speicherorte'; }
-  if (stripos($message, 'Galerieordner') !== false) { $add('nc_gallery_root'); $stage = 'Erweiterte Legacy-Einstellungen'; }
-  if (stripos($message, 'Datenbankansichten') !== false || stripos($message, 'Source-View') !== false) { $add('nc_source_view'); $stage = 'Erweiterte Legacy-Einstellungen'; }
-  if (stripos($message, 'Datenbankansichten') !== false || stripos($message, 'Activity-View') !== false) { $add('nc_activity_view'); $stage = 'Erweiterte Legacy-Einstellungen'; }
-
-  if (stripos($message, 'Nextcloud') !== false)
-  {
-    $stage = 'Nextcloud / WebDAV';
-    if (stripos($message, 'Adresse') !== false) $add('nc_nextcloud_url');
-    if (stripos($message, 'Benutzer') !== false) $add('nc_nextcloud_user');
-    if (stripos($message, 'Passwort') !== false) $add('nc_nextcloud_password');
-  }
-  if (stripos($message, 'API') !== false)
-  {
-    $stage = 'Piwigo API';
-    $add('nc_connection_api_key_id');
-    $add('nc_connection_api_key_secret');
-  }
-  if (stripos($message, 'Fallback') !== false)
-  {
-    $stage = 'Piwigo-Fallback';
-    $add('nc_fallback_user');
-    $add('nc_fallback_password');
-  }
-
-  bratonien_tools_nc_edit_fail(
-    $message,
-    $fields,
-    $stage,
-    'Interne Prüfung: '.get_class($e)
-  );
-}
--- a/nc-connector-source-picker-start.php
+++ b/nc-connector-source-picker-start.php
@@ -1,104 +0,0 @@
-<?php
-$piwigo_root = realpath(dirname(__DIR__, 2));
-if ($piwigo_root === false)
-{
-  http_response_code(500);
-  exit;
-}
-define('PHPWG_ROOT_PATH', rtrim($piwigo_root, DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR);
-include_once(PHPWG_ROOT_PATH.'include/common.inc.php');
-
-header('Content-Type: application/json; charset=utf-8');
-header('Cache-Control: no-store, max-age=0');
-
-function bratonien_tools_nc_source_picker_json($status, array $payload)
-{
-  http_response_code((int)$status);
-  echo json_encode($payload, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
-  exit;
-}
-
-function bratonien_tools_nc_source_picker_fail($message, array $fields = array())
-{
-  bratonien_tools_nc_source_picker_json(422, array(
-    'ok'=>false,
-    'message'=>(string)$message,
-    'fields'=>array_values(array_unique($fields)),
-  ));
-}
-
-if (!defined('BRATONIEN_TOOLS_PATH'))
-{
-  bratonien_tools_nc_source_picker_json(404, array('ok'=>false, 'message'=>'Bratonien Tools ist nicht aktiv.', 'fields'=>array()));
-}
-if (!function_exists('is_admin') || !is_admin())
-{
-  bratonien_tools_nc_source_picker_json(403, array('ok'=>false, 'message'=>'Administratorrechte erforderlich.', 'fields'=>array()));
-}
-if (($_SERVER['REQUEST_METHOD'] ?? '') !== 'POST')
-{
-  bratonien_tools_nc_source_picker_json(405, array('ok'=>false, 'message'=>'Nur POST ist erlaubt.', 'fields'=>array()));
-}
-
-try
-{
-  check_pwg_token();
-  require_once(BRATONIEN_TOOLS_PATH.'include/tool_registry.inc.php');
-
-  $id = (int)($_POST['connection_id'] ?? 0);
-  $connection = bratonien_tools_nc_connector_connection($id, true);
-  if (!$connection)
-  {
-    bratonien_tools_nc_source_picker_fail('Die zu bearbeitende Verbindung wurde nicht gefunden.');
-  }
-  if ((string)$connection['adapter'] !== 'local')
-  {
-    bratonien_tools_nc_source_picker_fail('Die automatische Migrationsauswahl ist nur für die bestehende Legacy-Verbindung vorgesehen.');
-  }
-
-  $config = isset($connection['config']) && is_array($connection['config']) ? $connection['config'] : array();
-  $credentials = bratonien_tools_nc_connector_scoped_secret($connection);
-
-  $base_url = trim((string)($config['nextcloud_url'] ?? ''));
-  $username = trim((string)($credentials['nextcloud_user'] ?? ''));
-  $password = (string)($credentials['nextcloud_password'] ?? '');
-
-  $missing = array();
-  if ($base_url === '') $missing[] = 'nc_nextcloud_url';
-  if ($username === '') $missing[] = 'nc_nextcloud_user';
-  if ($password === '') $missing[] = 'nc_nextcloud_password';
-  if ($missing)
-  {
-    bratonien_tools_nc_source_picker_fail(
-      'Für die automatische Ordnerauswahl müssen Nextcloud-Adresse, Benutzer und Passwort gespeichert sein.',
-      $missing
-    );
-  }
-
-  bratonien_tools_nc_connector_prepare_webdav_wizard_from_connection($connection, 'migrate');
-
-  $state = bratonien_tools_nc_wizard_state();
-  if ((int)($state['step'] ?? 0) !== 2 || empty($state['scan_ok']) || empty($state['directory_selection_ready']))
-  {
-    $detail = trim((string)($state['technical_error'] ?? ''));
-    bratonien_tools_nc_source_picker_fail(
-      $detail !== '' ? 'Die Nextcloud-Ordner konnten nicht geladen werden: '.$detail : 'Die Nextcloud-Ordner konnten nicht geladen werden.',
-      array('nc_nextcloud_url','nc_nextcloud_user','nc_nextcloud_password')
-    );
-  }
-
-  bratonien_tools_nc_source_picker_json(200, array(
-    'ok'=>true,
-    'message'=>'Nextcloud-Ordner wurden geladen. Die Auswahl wird geöffnet.',
-    'fields'=>array(),
-  ));
-}
-catch (Throwable $e)
-{
-  $message = trim($e->getMessage());
-  if ($message === '') $message = 'Die Nextcloud-Ordnerauswahl konnte nicht vorbereitet werden.';
-  bratonien_tools_nc_source_picker_fail(
-    $message,
-    array('nc_nextcloud_url','nc_nextcloud_user','nc_nextcloud_password')
-  );
-}
--- a/runtime/build-webdav-media.sh
+++ b/runtime/build-webdav-media.sh
@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 set -Eeuo pipefail
+umask 0002

 CONFIG_FILE="${PIWIGO_CONFIG:-}"
 [[ -n "$CONFIG_FILE" && -r "$CONFIG_FILE" ]] || { echo "WebDAV-Konfiguration fehlt: ${CONFIG_FILE:-<leer>}" >&2; exit 1; }
@@ -22,6 +23,47 @@ exec 9>"$LOCK_FILE"
 flock -n 9 || exit 0

 PREVIEW_CACHE="$PIWIGO_ROOT/_data/bratonien-tools/nc-webdav-preview/connection-$CONNECTION_ID"
+SOURCE_CACHE="$PIWIGO_ROOT/_data/bratonien-tools/nc-webdav-gallery/connection-$CONNECTION_ID"
+DERIVATIVE_CACHE="$PIWIGO_ROOT/_data/i/_data/bratonien-tools/nc-webdav-gallery/connection-$CONNECTION_ID"
+PIWIGO_DATA="$PIWIGO_ROOT/_data"
+
+normalize_connector_cache_permissions() {
+    [[ -d "$PIWIGO_DATA" ]] || return 0
+
+    local data_uid data_gid current_uid path
+    data_uid="$(stat -c '%u' "$PIWIGO_DATA")"
+    data_gid="$(stat -c '%g' "$PIWIGO_DATA")"
+    current_uid="$(id -u)"
+
+    for path in "$SOURCE_CACHE" "$PREVIEW_CACHE" "$DERIVATIVE_CACHE"; do
+        [[ -e "$path" ]] || continue
+
+        if [[ "$current_uid" -eq 0 ]]; then
+            chown -R "$data_uid:$data_gid" -- "$path"
+        fi
+
+        if ! find "$path" -type d -exec chmod 2775 {} + 2>/dev/null; then
+            echo "Hinweis: Verzeichnisrechte konnten ohne Root-Rechte nicht vollständig repariert werden: $path" >&2
+        fi
+        if ! find "$path" -type f -exec chmod 0664 {} + 2>/dev/null; then
+            echo "Hinweis: Dateirechte konnten ohne Root-Rechte nicht vollständig repariert werden: $path" >&2
+        fi
+    done
+}
+
+# Altbestände aus früheren root/systemd-Läufen werden repariert, sobald dieser
+# Lauf mit ausreichenden Rechten ausgeführt wird. Bei normalen Webserver-Läufen
+# werden zumindest alle eigenen Dateien gruppenschreibbar gehalten.
+normalize_connector_cache_permissions
+
+# Dieser Medienlauf wird erst nach einem erfolgreichen WebDAV-Aufbau und einer
+# erfolgreichen Piwigo-Synchronisierung gestartet. Deshalb darf erst hier aus
+# "lokale Connector-Datei fehlt" auf eine in Nextcloud entfernte Freigabe/Datei
+# geschlossen werden. Bei einer nicht erreichbaren Verbindung wird dieser Block
+# niemals ausgeführt und der vorhandene Piwigo-Bestand bleibt unverändert.
+php "$SCRIPT_DIR/cleanup-missing-webdav-images.php" \
+    --piwigo-root="$PIWIGO_ROOT" \
+    --connection-id="$CONNECTION_ID"

 php "$SCRIPT_DIR/lib/precache-webdav-previews.php" \
    --mapping="$WEBDAV_MAPPING_FILE" \
@@ -33,3 +75,5 @@ php "$SCRIPT_DIR/lib/precache-webdav-previews.php" \
 php "$SCRIPT_DIR/lib/build-webdav-derivatives.php" \
    --piwigo-root="$PIWIGO_ROOT" \
    --connection-id="$CONNECTION_ID"
+
+normalize_connector_cache_permissions
--- a/runtime/cleanup-missing-webdav-images.php
+++ b/runtime/cleanup-missing-webdav-images.php
@@ -0,0 +1,142 @@
+#!/usr/bin/env php
+<?php
+if (PHP_SAPI !== 'cli')
+{
+  fwrite(STDERR, "CLI only\n");
+  exit(1);
+}
+
+$options = getopt('', array('piwigo-root:', 'connection-id:'));
+$piwigo_root = rtrim((string)($options['piwigo-root'] ?? ''), '/');
+$connection_id = (int)($options['connection-id'] ?? 0);
+if ($piwigo_root === '' || $connection_id < 1)
+{
+  fwrite(STDERR, "Parameter --piwigo-root und --connection-id werden benoetigt.\n");
+  exit(1);
+}
+
+$db_config = $piwigo_root.'/local/config/database.inc.php';
+if (!is_readable($db_config))
+{
+  fwrite(STDERR, "Piwigo-Datenbankkonfiguration ist nicht lesbar.\n");
+  exit(1);
+}
+
+$conf = array();
+$prefixeTable = 'piwigo_';
+require $db_config;
+foreach (array('db_host','db_user','db_password','db_base') as $key)
+{
+  if (!isset($conf[$key]))
+  {
+    fwrite(STDERR, "Piwigo-Datenbankkonfiguration ist unvollstaendig: $key\n");
+    exit(1);
+  }
+}
+
+$db = new mysqli($conf['db_host'], $conf['db_user'], $conf['db_password'], $conf['db_base']);
+if ($db->connect_errno)
+{
+  fwrite(STDERR, "Piwigo-Datenbank ist nicht erreichbar: ".$db->connect_error."\n");
+  exit(1);
+}
+$db->set_charset('utf8mb4');
+
+$table = $prefixeTable.'bratonien_tools_nc_connections';
+$result = $db->query('SELECT config_json FROM `'.$table.'` WHERE id='.$connection_id.' LIMIT 1');
+if (!$result || !$result->num_rows)
+{
+  fwrite(STDERR, "Connector-Verbindung #$connection_id wurde nicht gefunden.\n");
+  exit(1);
+}
+$config = json_decode((string)$result->fetch_assoc()['config_json'], true);
+if (!is_array($config) || (string)($config['source_mode'] ?? '') !== 'webdav-placeholder')
+{
+  echo "Keine WebDAV-Bereinigung erforderlich.\n";
+  exit(0);
+}
+
+$prefixes = array(
+  './_data/bratonien-tools/nc-webdav-gallery/connection-'.$connection_id.'/',
+  './_data/bratonien-tools/nc-webdav-source/connection-'.$connection_id.'/',
+  './galleries/bratonien-webdav-'.$connection_id.'/',
+);
+
+$gallery_root = rtrim(str_replace('\\', '/', (string)($config['parallel_gallery_root'] ?? '')), '/');
+$normalized_piwigo_root = rtrim(str_replace('\\', '/', $piwigo_root), '/');
+if ($gallery_root !== '' && strpos($gallery_root, $normalized_piwigo_root.'/') === 0)
+{
+  $relative = ltrim(substr($gallery_root, strlen($normalized_piwigo_root)), '/');
+  if ($relative !== '') $prefixes[] = './'.rtrim($relative, '/').'/';
+}
+$prefixes = array_values(array_unique($prefixes));
+
+$where = array();
+foreach ($prefixes as $prefix)
+{
+  $escaped = $db->real_escape_string(addcslashes($prefix, "_%\\"));
+  $where[] = "path LIKE '{$escaped}%' ESCAPE '\\\\'";
+}
+
+$images_table = $prefixeTable.'images';
+$rows = $db->query("SELECT id, path FROM `{$images_table}` WHERE ".implode(' OR ', $where));
+if (!$rows)
+{
+  fwrite(STDERR, "Connector-Bilder konnten nicht gelesen werden: ".$db->error."\n");
+  exit(1);
+}
+
+$missing_ids = array();
+while ($row = $rows->fetch_assoc())
+{
+  $path = (string)$row['path'];
+  $owned = false;
+  foreach ($prefixes as $prefix)
+  {
+    if (strpos($path, $prefix) === 0)
+    {
+      $owned = true;
+      break;
+    }
+  }
+  if (!$owned) continue;
+
+  $absolute = $piwigo_root.'/'.ltrim(preg_replace('#^\./#', '', $path), '/');
+  if (!is_file($absolute))
+  {
+    $missing_ids[] = (int)$row['id'];
+  }
+}
+$db->close();
+
+if (!$missing_ids)
+{
+  echo "WebDAV-Bereinigung: keine fehlenden Piwigo-Bilder.\n";
+  exit(0);
+}
+
+// Dieser Prozess wird ausschliesslich nach einem erfolgreich abgeschlossenen
+// WebDAV-Aufbau und erfolgreicher Piwigo-Synchronisierung gestartet. Eine
+// nicht erreichbare Verbindung kann deshalb niemals ueber diesen Pfad Bilder
+// entfernen.
+define('PHPWG_ROOT_PATH', $piwigo_root.'/');
+$_SERVER['REMOTE_ADDR'] = '127.0.0.1';
+$_SERVER['SERVER_ADDR'] = '127.0.0.1';
+$_SERVER['SERVER_NAME'] = 'localhost';
+$_SERVER['HTTP_HOST'] = 'localhost';
+$_SERVER['SERVER_PORT'] = '80';
+$_SERVER['REQUEST_METHOD'] = 'GET';
+$_SERVER['REQUEST_URI'] = '/';
+$_SERVER['SCRIPT_NAME'] = '/plugins/bratonien_tools/runtime/cleanup-missing-webdav-images.php';
+$_SERVER['PHP_SELF'] = $_SERVER['SCRIPT_NAME'];
+$_SERVER['QUERY_STRING'] = '';
+$_SERVER['HTTPS'] = 'off';
+
+require_once(PHPWG_ROOT_PATH.'include/common.inc.php');
+include_once(PHPWG_ROOT_PATH.'admin/include/functions.php');
+
+$deleted = delete_elements(array_values(array_unique(array_map('intval', $missing_ids))), false);
+update_category('all');
+invalidate_user_cache(true);
+
+echo 'WebDAV-Bereinigung: '.(int)$deleted." nicht mehr freigegebene/vorhandene Bilder aus Piwigo entfernt.\n";
--- a/runtime/cleanup-webdav-piwigo.php
+++ b/runtime/cleanup-webdav-piwigo.php
@@ -47,24 +47,31 @@ function bratonien_cleanup_tree($path, $allowed_root)
  @rmdir($path);
 }

-function bratonien_webdav_site_images($site_id)
+function bratonien_connection_id_from_owned_path($path)
 {
-  $rows = array();
-  $query = '
-SELECT DISTINCT i.id, i.path, i.representative_ext
-  FROM '.IMAGES_TABLE.' AS i
-  LEFT JOIN '.CATEGORIES_TABLE.' AS sc ON sc.id = i.storage_category_id
-  LEFT JOIN '.IMAGE_CATEGORY_TABLE.' AS ic ON ic.image_id = i.id
-  LEFT JOIN '.CATEGORIES_TABLE.' AS vc ON vc.id = ic.category_id
-  WHERE sc.site_id = '.(int)$site_id.' OR vc.site_id = '.(int)$site_id.'
-;';
-  $result = pwg_query($query);
-  while ($row = pwg_db_fetch_assoc($result))
+  $path = (string)$path;
+  foreach (array(
+    '#^\./_data/bratonien-tools/nc-webdav-gallery/connection-([0-9]+)/#',
+    '#^\./_data/bratonien-tools/nc-webdav-source/connection-([0-9]+)/#',
+    '#^\./galleries/bratonien-webdav-([0-9]+)/#',
+  ) as $pattern)
  {
-    $row['id'] = (int)$row['id'];
-    $rows[$row['id']] = $row;
+    if (preg_match($pattern, $path, $match)) return (int)$match[1];
  }
-  return $rows;
+  return 0;
+}
+
+function bratonien_connection_id_from_site_url($url)
+{
+  $url = (string)$url;
+  foreach (array(
+    '#^\./_data/bratonien-tools/nc-webdav-gallery/connection-([0-9]+)/$#',
+    '#^\./galleries/bratonien-webdav-([0-9]+)/$#',
+  ) as $pattern)
+  {
+    if (preg_match($pattern, $url, $match)) return (int)$match[1];
+  }
+  return 0;
 }

 try
@@ -84,24 +91,24 @@ try
    }
  }

-  $site_prefix = './_data/bratonien-tools/nc-webdav-gallery/connection-';
-  $result = pwg_query(
-    "SELECT id, galleries_url FROM ".SITES_TABLE.
-    " WHERE galleries_url LIKE '".pwg_db_real_escape_string($site_prefix)."%'"
-  );
-
-  $removed_sites = 0;
  $removed_images = 0;
-  while ($site = pwg_db_fetch_assoc($result))
+  $stale_by_connection = array();
+  $result = pwg_query(
+    "SELECT id, path, representative_ext FROM ".IMAGES_TABLE.
+    " WHERE path LIKE './_data/bratonien-tools/nc-webdav-gallery/connection-%'".
+    " OR path LIKE './_data/bratonien-tools/nc-webdav-source/connection-%'".
+    " OR path LIKE './galleries/bratonien-webdav-%'"
+  );
+  while ($row = pwg_db_fetch_assoc($result))
  {
-    $site_id = (int)$site['id'];
-    $site_url = (string)$site['galleries_url'];
-    if (!preg_match('#^\./_data/bratonien-tools/nc-webdav-gallery/connection-([0-9]+)/$#', $site_url, $match)) continue;
-
-    $connection_id = (int)$match[1];
+    $connection_id = bratonien_connection_id_from_owned_path($row['path'] ?? '');
    if ($connection_id < 1 || isset($active[$connection_id])) continue;
+    $row['id'] = (int)$row['id'];
+    $stale_by_connection[$connection_id][$row['id']] = $row;
+  }

-    $images = bratonien_webdav_site_images($site_id);
+  foreach ($stale_by_connection as $connection_id=>$images)
+  {
    foreach ($images as $row)
    {
      try
@@ -114,48 +121,60 @@ try
      }
    }

-    delete_site($site_id);
-
-    if ($images)
-    {
-      $ids = array_keys($images);
-      $remaining = query2array(
-        'SELECT id FROM '.IMAGES_TABLE.' WHERE id IN ('.implode(',', array_map('intval', $ids)).')',
-        null,
-        'id'
-      );
-      if ($remaining)
-      {
-        delete_elements(array_map('intval', $remaining), false);
-      }
-    }
-
-    $removed_sites++;
+    delete_elements(array_map('intval', array_keys($images)), false);
    $removed_images += count($images);
-    echo 'NC WebDAV: entferne verwaiste Piwigo-Site '.$site_id.' für gelöschte Verbindung '.$connection_id.".\n";
+    echo 'NC WebDAV: entferne '.count($images).' verwaiste Bilder der gelöschten Verbindung '.$connection_id.".\n";
+  }

-    $gallery_root = PHPWG_ROOT_PATH.'_data/bratonien-tools/nc-webdav-gallery';
-    $source_root = PHPWG_ROOT_PATH.'_data/bratonien-tools/nc-webdav-source';
-    $preview_root = PHPWG_ROOT_PATH.'_data/bratonien-tools/nc-webdav-preview';
+  $removed_sites = 0;
+  $result = pwg_query('SELECT id, galleries_url FROM '.SITES_TABLE);
+  $stale_sites = array();
+  while ($site = pwg_db_fetch_assoc($result))
+  {
+    $connection_id = bratonien_connection_id_from_site_url($site['galleries_url'] ?? '');
+    if ($connection_id < 1 || isset($active[$connection_id])) continue;
+    $stale_sites[] = array('id'=>(int)$site['id'], 'connection_id'=>$connection_id);
+  }
+
+  foreach ($stale_sites as $site)
+  {
+    delete_site($site['id']);
+    $removed_sites++;
+    echo 'NC WebDAV: entferne verwaiste Piwigo-Site '.$site['id'].' der gelöschten Verbindung '.$site['connection_id'].".\n";
+  }
+
+  $stale_connection_ids = array_unique(array_merge(
+    array_map('intval', array_keys($stale_by_connection)),
+    array_map(function($site) { return (int)$site['connection_id']; }, $stale_sites)
+  ));
+
+  $gallery_root = PHPWG_ROOT_PATH.'_data/bratonien-tools/nc-webdav-gallery';
+  $source_root = PHPWG_ROOT_PATH.'_data/bratonien-tools/nc-webdav-source';
+  $preview_root = PHPWG_ROOT_PATH.'_data/bratonien-tools/nc-webdav-preview';
+  $legacy_root = PHPWG_ROOT_PATH.'galleries';
+  $state_root = '/var/lib/bratonien-tools/nc-connector';
+  $status_root = PHPWG_ROOT_PATH.'_data/bratonien-tools/nc-connector-status';
+
+  foreach ($stale_connection_ids as $connection_id)
+  {
+    if ($connection_id < 1) continue;
    bratonien_cleanup_tree($gallery_root.'/connection-'.$connection_id, $gallery_root);
    bratonien_cleanup_tree($source_root.'/connection-'.$connection_id, $source_root);
    bratonien_cleanup_tree($preview_root.'/connection-'.$connection_id, $preview_root);
-
-    $state_root = '/var/lib/bratonien-tools/nc-connector';
+    bratonien_cleanup_tree($legacy_root.'/bratonien-webdav-'.$connection_id, $legacy_root);
    bratonien_cleanup_tree($state_root.'/connection-'.$connection_id, $state_root);

    foreach (glob('/etc/bratonien-tools/nc-connector/webdav-connection-'.$connection_id.'.*') ?: array() as $file)
    {
      @unlink($file);
    }
-
-    $status_root = PHPWG_ROOT_PATH.'_data/bratonien-tools/nc-connector-status';
    @unlink($status_root.'/connection-'.$connection_id.'.json');
    @unlink($status_root.'/deleted-'.$connection_id);
  }

-  if ($removed_sites > 0)
+  if ($removed_sites > 0 || $removed_images > 0)
  {
+    update_category('all');
    invalidate_user_cache(true);
  }

--- a/runtime/lib/build-webdav-derivatives.php
+++ b/runtime/lib/build-webdav-derivatives.php
@@ -6,8 +6,6 @@ if (PHP_SAPI !== 'cli')
  exit(1);
 }

-const BRATONIEN_WEBDAV_DERIVATIVE_BUILDER_VERSION = '0.9.6.1';
-
 $options = getopt('', array('piwigo-root:', 'connection-id:'));
 $piwigo_root = rtrim((string)($options['piwigo-root'] ?? ''), '/');
 $connection_id = (int)($options['connection-id'] ?? 0);
@@ -33,14 +31,11 @@ $_SERVER['REQUEST_URI'] = '/';
 $_SERVER['SCRIPT_NAME'] = '/plugins/bratonien_tools/runtime/lib/build-webdav-derivatives.php';
 $_SERVER['PHP_SELF'] = $_SERVER['SCRIPT_NAME'];
 $_SERVER['QUERY_STRING'] = '';
-$_SERVER['HTTP_USER_AGENT'] = 'Bratonien-WebDAV-Derivative-Builder/'.BRATONIEN_WEBDAV_DERIVATIVE_BUILDER_VERSION;
 $_SERVER['HTTPS'] = 'off';

 require_once(PHPWG_ROOT_PATH.'include/common.inc.php');
-require_once(PHPWG_ROOT_PATH.'include/derivative.inc.php');
-require_once(PHPWG_ROOT_PATH.'admin/include/image.class.php');

-if (!function_exists('bratonien_tools_webdav_image_source_info') || !function_exists('bratonien_tools_webdav_generate_derivative'))
+if (!function_exists('bratonien_tools_webdav_image_source_info') || !function_exists('bratonien_tools_webdav_preview_path'))
 {
  fwrite(STDERR, "Bratonien WebDAV-Bildruntime ist nicht aktiv.\n");
  exit(1);
@@ -48,20 +43,12 @@ if (!function_exists('bratonien_tools_webdav_image_source_info') || !function_ex

 try
 {
-  $variants = bratonien_tools_webdav_derivative_variants();
-  if (!$variants)
-  {
-    throw new RuntimeException('Keine Piwigo-Derivate konfiguriert.');
-  }
-
  $images = 0;
-  $generated_or_ready = 0;
-  $identity = 0;
-  $metadata_repaired = 0;
+  $updated = 0;
  $errors = 0;
  $error_lines = array();

-  $result = pwg_query('SELECT * FROM '.IMAGES_TABLE.' ORDER BY id');
+  $result = pwg_query('SELECT id, width, height, rotation FROM '.IMAGES_TABLE.' ORDER BY id');
  while ($row = pwg_db_fetch_assoc($result))
  {
    $image_id = (int)$row['id'];
@@ -77,14 +64,6 @@ try
      continue;
    }

-    $preview_ext = strtolower(pathinfo($preview, PATHINFO_EXTENSION));
-    if (!in_array($preview_ext, array('jpg', 'jpeg', 'png', 'gif'), true))
-    {
-      $errors++;
-      $error_lines[] = 'Bild #'.$image_id.': Preview-Format '.$preview_ext.' ist nicht Piwigo-kompatibel; Precache muss neu erzeugt werden.';
-      continue;
-    }
-
    $size = @getimagesize($preview);
    if (!is_array($size) || empty($size[0]) || empty($size[1]))
    {
@@ -93,82 +72,41 @@ try
      continue;
    }

-    $preview_width = (int)$size[0];
-    $preview_height = (int)$size[1];
-    if ((int)($row['width'] ?? 0) !== $preview_width || (int)($row['height'] ?? 0) !== $preview_height || (int)($row['rotation'] ?? 0) !== 0)
+    $width = (int)$size[0];
+    $height = (int)$size[1];
+    if ((int)($row['width'] ?? 0) === $width && (int)($row['height'] ?? 0) === $height && (int)($row['rotation'] ?? 0) === 0)
    {
-      pwg_query(
-        'UPDATE '.IMAGES_TABLE.
-        ' SET width='.$preview_width.', height='.$preview_height.', rotation=0'.
-        ' WHERE id='.$image_id
-      );
-      $row['width'] = $preview_width;
-      $row['height'] = $preview_height;
-      $row['rotation'] = 0;
-      $metadata_repaired++;
+      continue;
    }

-    $src = new SrcImage($row);
-    foreach ($variants as $variant_name => $params)
-    {
-      try
-      {
-        $probe = new DerivativeImage($params, $src);
-        if ($probe->same_as_source())
-        {
-          $identity++;
-          continue;
-        }
-
-        $detail = '';
-        if (bratonien_tools_webdav_generate_derivative($params, $src, $detail))
-        {
-          $generated_or_ready++;
-        }
-        else
-        {
-          $errors++;
-          $error_lines[] = 'Bild #'.$image_id.' '.$variant_name.': '.($detail !== '' ? $detail : 'Derivat konnte nicht erzeugt werden.');
-        }
-      }
-      catch (Throwable $e)
-      {
-        $errors++;
-        $error_lines[] = 'Bild #'.$image_id.' '.$variant_name.': '.get_class($e).': '.$e->getMessage();
-      }
-    }
+    pwg_query(
+      'UPDATE '.IMAGES_TABLE.
+      ' SET width='.$width.', height='.$height.', rotation=0'.
+      ' WHERE id='.$image_id
+    );
+    $updated++;
  }

-  if ($metadata_repaired > 0)
+  if ($updated > 0)
  {
    update_category('all');
    invalidate_user_cache(true);
  }

-  if ($errors > 0)
+  foreach (array_slice($error_lines, 0, 30) as $line)
  {
-    foreach (array_slice($error_lines, 0, 30) as $line)
-    {
-      fwrite(STDERR, $line."\n");
-    }
-    if (count($error_lines) > 30)
-    {
-      fwrite(STDERR, 'Weitere Fehler: '.(count($error_lines) - 30)."\n");
-    }
+    fwrite(STDERR, $line."\n");
+  }
+  if (count($error_lines) > 30)
+  {
+    fwrite(STDERR, 'Weitere Fehler: '.(count($error_lines) - 30)."\n");
  }

-  echo 'WebDAV-Derivative-Builder: version='.BRATONIEN_WEBDAV_DERIVATIVE_BUILDER_VERSION.
-    ' bilder='.$images.
-    ' varianten='.count($variants).
-    ' bereit='.$generated_or_ready.
-    ' identisch='.$identity.
-    ' metadaten_repariert='.$metadata_repaired.
-    ' fehler='.$errors."\n";
-
+  echo 'WebDAV-Metadaten: bilder='.$images.' aktualisiert='.$updated.' fehler='.$errors."\n";
  exit($errors > 0 ? 1 : 0);
 }
 catch (Throwable $e)
 {
-  fwrite(STDERR, 'WebDAV-Derivate: '.get_class($e).': '.$e->getMessage()."\n");
+  fwrite(STDERR, 'WebDAV-Metadaten: '.get_class($e).': '.$e->getMessage()."\n");
  exit(1);
 }
--- a/runtime/lib/build_webdav_placeholder_source.py
+++ b/runtime/lib/build_webdav_placeholder_source.py
@@ -14,6 +14,7 @@ import getpass
 import json
 import os
 import shutil
+import socket
 import ssl
 import sys
 import tempfile
@@ -21,6 +22,7 @@ import urllib.error
 import urllib.parse
 import urllib.request
 import xml.etree.ElementTree as ET
+from contextlib import contextmanager
 from pathlib import Path, PurePosixPath

 DAV = "DAV:"
@@ -52,9 +54,37 @@ def safe_local_name(name: str) -> str:
    return name


+@contextmanager
+def pinned_resolution(host: str, ip: str):
+    host = host.strip("[]").lower()
+    ip = ip.strip("[]")
+    if not host or not ip or host == ip:
+        yield
+        return
+
+    original = socket.getaddrinfo
+
+    def resolve(name, port, family=0, type=0, proto=0, flags=0):
+        normalized = str(name).strip("[]").lower()
+        if normalized == host:
+            return original(ip, port, family, type, proto, flags)
+        return original(name, port, family, type, proto, flags)
+
+    socket.getaddrinfo = resolve
+    try:
+        yield
+    finally:
+        socket.getaddrinfo = original
+
+
 class WebDavClient:
-    def __init__(self, base_url: str, user: str, password: str, timeout: int = 30) -> None:
+    def __init__(self, base_url: str, user: str, password: str, timeout: int = 30, connect_ip: str = "") -> None:
        self.base_url = base_url.rstrip("/")
+        parsed = urllib.parse.urlparse(self.base_url)
+        if parsed.scheme not in {"http", "https"} or not parsed.hostname:
+            fail("Nextcloud base URL must use HTTP or HTTPS and contain a host")
+        self.host = parsed.hostname.strip("[]")
+        self.connect_ip = connect_ip.strip("[]") or self.host
        self.user = user
        self.password = password
        self.timeout = timeout
@@ -84,9 +114,10 @@ class WebDavClient:
        request.add_header("Depth", "1")
        request.add_header("Content-Type", "application/xml; charset=utf-8")
        try:
-            with urllib.request.urlopen(request, timeout=self.timeout, context=self.context) as response:
-                status = response.status
-                payload = response.read()
+            with pinned_resolution(self.host, self.connect_ip):
+                with urllib.request.urlopen(request, timeout=self.timeout, context=self.context) as response:
+                    status = response.status
+                    payload = response.read()
        except urllib.error.HTTPError as error:
            if error.code in {401, 403}:
                fail("Nextcloud rejected the WebDAV credentials or directory access")
@@ -96,14 +127,14 @@ class WebDavClient:
        if status != 207:
            fail(f"Nextcloud PROPFIND returned HTTP {status}")

+        base_path = urllib.parse.unquote(urllib.parse.urlparse(url).path).rstrip("/")
+        current: dict[str, object] | None = None
+        children: list[dict[str, object]] = []
        try:
            root = ET.fromstring(payload)
        except ET.ParseError as error:
            raise RuntimeError("Nextcloud returned invalid WebDAV XML") from error

-        base_path = urllib.parse.unquote(urllib.parse.urlparse(url).path).rstrip("/")
-        current: dict[str, object] | None = None
-        children: list[dict[str, object]] = []
        for response in root.findall(f"{{{DAV}}}response"):
            href = response.findtext(f"{{{DAV}}}href", default="")
            href_path = urllib.parse.unquote(urllib.parse.urlparse(href).path).rstrip("/")
@@ -213,6 +244,7 @@ def atomic_text(path: Path, text: str) -> None:
 def main() -> int:
    parser = argparse.ArgumentParser()
    parser.add_argument("--base-url", required=True)
+    parser.add_argument("--connect-ip", default="", help="IP address used for the TCP connection while preserving the URL host for HTTP Host and TLS SNI")
    parser.add_argument("--user", required=True)
    parser.add_argument("--password-file", type=Path)
    parser.add_argument("--root", action="append", required=True, help="WebDAV path relative to the authenticated user's files root")
@@ -241,7 +273,7 @@ def main() -> int:
            shutil.rmtree(staging)
        staging.mkdir(parents=True)

-        client = WebDavClient(args.base_url, args.user, password, max(1, args.timeout))
+        client = WebDavClient(args.base_url, args.user, password, max(1, args.timeout), args.connect_ip)
        mapping: dict[str, dict[str, object]] = {}
        manifest: list[str] = []
        total_files = total_folders = total_skipped = 0
@@ -303,6 +335,7 @@ def main() -> int:
        atomic_json(args.mapping, {
            "version": 1,
            "base_url": args.base_url.rstrip("/"),
+            "connect_ip": client.connect_ip,
            "user": args.user,
            "files": final_mapping,
        })
@@ -311,6 +344,7 @@ def main() -> int:
            "files": total_files,
            "folders": total_folders,
            "skipped": total_skipped,
+            "connect_ip": client.connect_ip,
            "source_dir": str(source_dir),
            "manifest": str(args.manifest),
            "mapping": str(args.mapping),
--- a/runtime/lib/precache-webdav-previews.php
+++ b/runtime/lib/precache-webdav-previews.php
@@ -6,6 +6,8 @@ if (PHP_SAPI !== 'cli')
  exit(1);
 }

+require_once(dirname(__DIR__, 2).'/include/nc_transport.inc.php');
+
 const BRATONIEN_WEBDAV_PREVIEW_VERSION = 2;
 const BRATONIEN_WEBDAV_PREVIEW_MAX_EDGE = 4096;
 const BRATONIEN_WEBDAV_PREVIEW_JPEG_QUALITY = 88;
@@ -24,7 +26,7 @@ function quote_webdav_path($path)
 function fetch_remote_blob($url, $user, $password)
 {
  $ch = curl_init($url);
-  curl_setopt_array($ch, array(
+  $options = array(
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_FOLLOWLOCATION => false,
    CURLOPT_CONNECTTIMEOUT => 10,
@@ -32,8 +34,10 @@ function fetch_remote_blob($url, $user, $password)
    CURLOPT_HTTPAUTH => CURLAUTH_BASIC,
    CURLOPT_USERPWD => $user.':'.$password,
    CURLOPT_FAILONERROR => false,
-    CURLOPT_USERAGENT => 'Bratonien-Tools-WebDAV-Precache/0.9.6.1',
-  ));
+    CURLOPT_USERAGENT => 'Bratonien-Tools-WebDAV-Precache/0.9.7.16',
+  );
+  bratonien_tools_nc_transport_apply_curl($options, $url);
+  curl_setopt_array($ch, $options);
  $body = curl_exec($ch);
  $errno = curl_errno($ch);
  $error = curl_error($ch);
@@ -48,12 +52,11 @@ function fetch_remote_blob($url, $user, $password)

 function preview_extension_for_entry(array $entry)
 {
-  $content_type = strtolower(trim((string)($entry['content_type'] ?? '')));
  $path = strtolower((string)($entry['webdav_path'] ?? ''));
-  if ($content_type === 'image/png' || preg_match('/\.png$/', $path))
-  {
-    return 'png';
-  }
+  $extension = strtolower(pathinfo($path, PATHINFO_EXTENSION));
+  if ($extension === 'png') return 'png';
+  if ($extension === 'gif') return 'gif';
+  if ($extension === 'webp') return 'webp';
  return 'jpg';
 }

@@ -64,7 +67,7 @@ function preview_target_for_entry($cache_dir, $key, array $entry)

 function remove_other_preview_format($cache_dir, $key, $keep_target)
 {
-  foreach (array('jpg', 'png', 'webp') as $ext)
+  foreach (array('jpg', 'png', 'gif', 'webp') as $ext)
  {
    $candidate = $cache_dir.'/'.$key.'.'.$ext;
    if ($candidate !== $keep_target && is_file($candidate)) @unlink($candidate);
@@ -86,13 +89,19 @@ function write_preview_imagick($blob, $target, $extension)
    {
      $image->setImageFormat('png');
    }
+    elseif ($extension === 'gif')
+    {
+      $image->setImageFormat('gif');
+    }
+    elseif ($extension === 'webp')
+    {
+      $image->setImageFormat('webp');
+      $image->setImageCompressionQuality(BRATONIEN_WEBDAV_PREVIEW_JPEG_QUALITY);
+    }
    else
    {
      $image->setImageBackgroundColor('white');
-      if (method_exists($image, 'mergeImageLayers'))
-      {
-        $image = $image->mergeImageLayers(Imagick::LAYERMETHOD_FLATTEN);
-      }
+      if (method_exists($image, 'mergeImageLayers')) $image = $image->mergeImageLayers(Imagick::LAYERMETHOD_FLATTEN);
      $image->setImageFormat('jpeg');
      $image->setImageCompression(Imagick::COMPRESSION_JPEG);
      $image->setImageCompressionQuality(BRATONIEN_WEBDAV_PREVIEW_JPEG_QUALITY);
@@ -127,7 +136,7 @@ function write_preview_gd($blob, $target, $extension)

    try
    {
-      if ($extension === 'png')
+      if (in_array($extension, array('png', 'gif', 'webp'), true))
      {
        imagealphablending($preview, false);
        imagesavealpha($preview, true);
@@ -145,10 +154,12 @@ function write_preview_gd($blob, $target, $extension)
        fail_preview('GD konnte das Preview nicht skalieren.');
      }

-      $written = $extension === 'png'
-        ? imagepng($preview, $target, 6)
-        : imagejpeg($preview, $target, BRATONIEN_WEBDAV_PREVIEW_JPEG_QUALITY);
-      if (!$written) fail_preview('GD konnte das Preview nicht schreiben.');
+      if ($extension === 'png') $written = imagepng($preview, $target, 6);
+      elseif ($extension === 'gif') $written = function_exists('imagegif') ? imagegif($preview, $target) : false;
+      elseif ($extension === 'webp') $written = function_exists('imagewebp') ? imagewebp($preview, $target, BRATONIEN_WEBDAV_PREVIEW_JPEG_QUALITY) : false;
+      else $written = imagejpeg($preview, $target, BRATONIEN_WEBDAV_PREVIEW_JPEG_QUALITY);
+
+      if (!$written) fail_preview('GD konnte das Preview im Format '.$extension.' nicht schreiben.');
    }
    finally
    {
@@ -164,7 +175,7 @@ function write_preview_gd($blob, $target, $extension)
 function write_preview($blob, $target, $extension)
 {
  $dir = dirname($target);
-  if (!is_dir($dir) && !mkdir($dir, 0755, true) && !is_dir($dir)) fail_preview('Preview-Verzeichnis konnte nicht angelegt werden.');
+  if (!is_dir($dir) && !mkdir($dir, 0775, true) && !is_dir($dir)) fail_preview('Preview-Verzeichnis konnte nicht angelegt werden.');

  if (class_exists('Imagick'))
  {
@@ -186,7 +197,48 @@ function write_preview($blob, $target, $extension)
    @unlink($target);
    fail_preview('Das erzeugte Preview ist ungültig.');
  }
-  @chmod($target, 0644);
+  @chmod($target, 0664);
+}
+
+function local_source_is_hydrated($source_path, $preview)
+{
+  if (!is_file($source_path) || !is_readable($source_path)) return false;
+  $source_size = @getimagesize($source_path);
+  $preview_size = @getimagesize($preview);
+  if (!is_array($source_size) || !is_array($preview_size)) return false;
+  if ((int)$source_size[0] !== (int)$preview_size[0] || (int)$source_size[1] !== (int)$preview_size[1]) return false;
+  $source_bytes = @filesize($source_path);
+  $preview_bytes = @filesize($preview);
+  return $source_bytes !== false && $preview_bytes !== false && (int)$source_bytes === (int)$preview_bytes;
+}
+
+function hydrate_local_source($source_path, $preview)
+{
+  $normalized = str_replace('\\', '/', (string)$source_path);
+  if (!preg_match('#/nc-webdav-source/connection-[0-9]+/root-[0-9]+/#', $normalized))
+  {
+    fail_preview('Unsicherer lokaler Connector-Quellpfad: '.$source_path);
+  }
+  if (!is_file($preview) || !is_readable($preview)) fail_preview('Preview für lokale Quelle fehlt: '.$preview);
+  if (local_source_is_hydrated($source_path, $preview)) return false;
+
+  $dir = dirname($source_path);
+  if (!is_dir($dir) && !mkdir($dir, 0775, true) && !is_dir($dir)) fail_preview('Lokales Connector-Verzeichnis konnte nicht angelegt werden: '.$dir);
+
+  $tmp = $source_path.'.bratonien-next-'.getmypid();
+  if (!@copy($preview, $tmp)) fail_preview('Preview konnte nicht in lokale Piwigo-Quelle kopiert werden: '.$source_path);
+  @chmod($tmp, 0664);
+  $mtime = @filemtime($preview);
+  if ($mtime) @touch($tmp, $mtime);
+  if (!@rename($tmp, $source_path))
+  {
+    @unlink($tmp);
+    fail_preview('Lokale Piwigo-Quelle konnte nicht ersetzt werden: '.$source_path);
+  }
+  clearstatcache(true, $source_path);
+  $size = @getimagesize($source_path);
+  if (!is_array($size) || empty($size[0]) || empty($size[1])) fail_preview('Lokale Piwigo-Quelle ist nach dem Ersetzen ungültig: '.$source_path);
+  return true;
 }

 try
@@ -208,8 +260,8 @@ try
  $mapping = json_decode((string)file_get_contents($mapping_file), true);
  if (!is_array($mapping) || !isset($mapping['files']) || !is_array($mapping['files'])) fail_preview('WebDAV-Mapping ist ungültig.');

-  if (!is_dir($cache_dir) && !mkdir($cache_dir, 0755, true) && !is_dir($cache_dir)) fail_preview('Preview-Cache konnte nicht angelegt werden.');
-  @chmod($cache_dir, 0755);
+  if (!is_dir($cache_dir) && !mkdir($cache_dir, 0775, true) && !is_dir($cache_dir)) fail_preview('Preview-Cache konnte nicht angelegt werden.');
+  @chmod($cache_dir, 2775);

  $state_file = $cache_dir.'/state.json';
  $old_state = array();
@@ -222,9 +274,10 @@ try
  $new_state = array();
  $generated = 0;
  $cached = 0;
+  $hydrated = 0;
  $errors = 0;

-  foreach ($mapping['files'] as $entry)
+  foreach ($mapping['files'] as $local_path=>$entry)
  {
    if (!is_array($entry) || (string)($entry['kind'] ?? '') !== 'file') continue;
    $webdav_path = trim((string)($entry['webdav_path'] ?? ''), '/');
@@ -241,26 +294,29 @@ try
      'version' => BRATONIEN_WEBDAV_PREVIEW_VERSION,
    );

-    $old = $old_state[$key] ?? null;
-    if (
-      is_file($target)
-      && is_array($old)
-      && (string)($old['etag'] ?? '') === $etag
-      && (string)($old['format'] ?? '') === $extension
-      && (int)($old['version'] ?? 0) === BRATONIEN_WEBDAV_PREVIEW_VERSION
-    )
-    {
-      $cached++;
-      continue;
-    }
-
    try
    {
-      $url = $base_url.'/remote.php/dav/files/'.rawurlencode($user).'/'.quote_webdav_path($webdav_path);
-      $blob = fetch_remote_blob($url, $user, $password);
-      write_preview($blob, $target, $extension);
-      remove_other_preview_format($cache_dir, $key, $target);
-      $generated++;
+      $old = $old_state[$key] ?? null;
+      $valid_cached = is_file($target)
+        && is_array($old)
+        && (string)($old['etag'] ?? '') === $etag
+        && (string)($old['format'] ?? '') === $extension
+        && (int)($old['version'] ?? 0) === BRATONIEN_WEBDAV_PREVIEW_VERSION;
+
+      if (!$valid_cached)
+      {
+        $url = $base_url.'/remote.php/dav/files/'.rawurlencode($user).'/'.quote_webdav_path($webdav_path);
+        $blob = fetch_remote_blob($url, $user, $password);
+        write_preview($blob, $target, $extension);
+        remove_other_preview_format($cache_dir, $key, $target);
+        $generated++;
+      }
+      else
+      {
+        $cached++;
+      }
+
+      if (hydrate_local_source((string)$local_path, $target)) $hydrated++;
    }
    catch (Throwable $e)
    {
@@ -273,14 +329,14 @@ try
  {
    if (!is_file($file) || basename($file) === 'state.json') continue;
    $name = basename($file);
-    if (!preg_match('/^([a-f0-9]{40})\.(jpg|png|webp)$/', $name, $m)) continue;
+    if (!preg_match('/^([a-f0-9]{40})\.(jpg|png|gif|webp)$/', $name, $m)) continue;
    if (!isset($new_state[$m[1]])) @unlink($file);
  }

  file_put_contents($state_file, json_encode($new_state, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT)."\n", LOCK_EX);
-  @chmod($state_file, 0644);
+  @chmod($state_file, 0664);

-  echo 'WebDAV-Previews: erzeugt='.$generated.' vorhanden='.$cached.' fehler='.$errors."\n";
+  echo 'WebDAV-Previews: erzeugt='.$generated.' vorhanden='.$cached.' lokale_quellen='.$hydrated.' fehler='.$errors."\n";
  exit($errors > 0 ? 1 : 0);
 }
 catch (Throwable $e)
--- a/runtime/lib/resolve-nextcloud-target.php
+++ b/runtime/lib/resolve-nextcloud-target.php
@@ -0,0 +1,24 @@
+#!/usr/bin/env php
+<?php
+if (PHP_SAPI !== 'cli')
+{
+  fwrite(STDERR, "CLI only\n");
+  exit(1);
+}
+
+require_once(dirname(__DIR__, 2).'/include/nc_transport.inc.php');
+
+try
+{
+  if ($argc !== 2) throw new RuntimeException('Aufruf: resolve-nextcloud-target.php <nextcloud-url>');
+  $url = rtrim(trim((string)$argv[1]), '/');
+  bratonien_tools_nc_transport_scheme($url);
+  $host = bratonien_tools_nc_transport_host($url);
+  echo bratonien_tools_nc_transport_public_ip($host)."\n";
+  exit(0);
+}
+catch (Throwable $e)
+{
+  fwrite(STDERR, $e->getMessage()."\n");
+  exit(1);
+}
--- a/runtime/native-runner.php
+++ b/runtime/native-runner.php
@@ -0,0 +1,108 @@
+#!/usr/bin/env php
+<?php
+if (PHP_SAPI !== 'cli')
+{
+  fwrite(STDERR, "CLI only\n");
+  exit(1);
+}
+
+$options = getopt('', array('connection-id::'));
+$connectionId = isset($options['connection-id']) ? (int)$options['connection-id'] : 0;
+
+$pluginRoot = dirname(__DIR__);
+$piwigoRoot = dirname($pluginRoot, 2);
+$base = rtrim($piwigoRoot, '/').'/_data/bratonien-tools';
+$schedulerDir = $base.'/nc-connector-scheduler';
+$stateFile = $schedulerDir.'/state.json';
+$runtimeDir = $base.'/nc-connector-runtime';
+$stateRoot = $base.'/nc-connector-state';
+
+function native_scheduler_state($path)
+{
+  if (!is_readable($path)) return array();
+  $decoded = json_decode((string)@file_get_contents($path), true);
+  return is_array($decoded) ? $decoded : array();
+}
+
+function native_scheduler_write($path, array $state)
+{
+  $json = json_encode($state, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT);
+  if (!is_string($json)) return false;
+  $tmp = $path.'.tmp';
+  if (@file_put_contents($tmp, $json."\n", LOCK_EX) === false) return false;
+  @chmod($tmp, 0640);
+  return @rename($tmp, $path);
+}
+
+foreach (array($schedulerDir, $runtimeDir, $stateRoot) as $dir)
+{
+  if (!is_dir($dir) && !@mkdir($dir, 0750, true) && !is_dir($dir))
+  {
+    fwrite(STDERR, "Runtime-Verzeichnis konnte nicht angelegt werden: {$dir}\n");
+    exit(1);
+  }
+}
+
+$state = native_scheduler_state($stateFile);
+$state['enabled'] = true;
+$state['mode'] = 'piwigo-native';
+$state['state'] = 'running';
+$state['message'] = $connectionId > 0 ? 'NC-Abgleich für Verbindung #'.$connectionId.' läuft.' : 'NC-Abgleich läuft.';
+$state['started_at'] = time();
+$state['timestamp'] = time();
+$state['connection_id'] = $connectionId;
+native_scheduler_write($stateFile, $state);
+
+$env = $_ENV;
+$env['PATH'] = '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin';
+$env['BRATONIEN_NC_NATIVE'] = '1';
+$env['BRATONIEN_NC_PIWIGO_ROOT'] = $piwigoRoot;
+$env['BRATONIEN_NC_CONFIG_DIR'] = $runtimeDir;
+$env['BRATONIEN_NC_STATE_ROOT'] = $stateRoot;
+$env['BRATONIEN_NC_CONNECTION_ID'] = (string)$connectionId;
+$env['LC_ALL'] = 'C';
+$env['LANG'] = 'C';
+
+$bash = is_executable('/usr/bin/bash') ? '/usr/bin/bash' : '/bin/bash';
+$command = array($bash, $pluginRoot.'/runtime/run-all.sh');
+$spec = array(
+  0=>array('file','/dev/null','r'),
+  1=>array('pipe','w'),
+  2=>array('pipe','w'),
+);
+$process = @proc_open($command, $spec, $pipes, null, $env);
+$stdout = '';
+$stderr = '';
+$exit = 1;
+if (is_resource($process))
+{
+  $stdout = (string)stream_get_contents($pipes[1]);
+  $stderr = (string)stream_get_contents($pipes[2]);
+  fclose($pipes[1]);
+  fclose($pipes[2]);
+  $exit = proc_close($process);
+}
+else
+{
+  $stderr = 'run-all.sh konnte nicht gestartet werden.';
+}
+
+$state = native_scheduler_state($stateFile);
+$state['enabled'] = true;
+$state['mode'] = 'piwigo-native';
+$state['state'] = $exit === 0 ? 'success' : 'error';
+$state['message'] = $exit === 0
+  ? ($connectionId > 0 ? 'NC-Abgleich für Verbindung #'.$connectionId.' erfolgreich abgeschlossen.' : 'NC-Abgleich erfolgreich abgeschlossen.')
+  : ($connectionId > 0 ? 'NC-Abgleich für Verbindung #'.$connectionId.' fehlgeschlagen.' : 'NC-Abgleich fehlgeschlagen.');
+$state['timestamp'] = time();
+$state['finished_at'] = time();
+$state['exit_code'] = $exit;
+$state['connection_id'] = $connectionId;
+$state['stdout'] = trim($stdout);
+$state['stderr'] = trim($stderr);
+if (empty($state['next_due']) || (int)$state['next_due'] < time())
+{
+  $state['next_due'] = time() + 60;
+}
+native_scheduler_write($stateFile, $state);
+exit($exit === 0 ? 0 : 1);
--- a/runtime/reconcile-webdav.php
+++ b/runtime/reconcile-webdav.php
@@ -78,8 +78,11 @@ function webdav_source_fingerprint($baseUrl, $user, array $roots)
 $pluginRoot = dirname(__DIR__);
 $piwigoRoot = dirname($pluginRoot, 2);
 $dbConfig = $piwigoRoot.'/local/config/database.inc.php';
-$configDir = '/etc/bratonien-tools/nc-connector';
-$stateRoot = '/var/lib/bratonien-tools/nc-connector';
+$nativeMode = getenv('BRATONIEN_NC_NATIVE') === '1';
+$configDir = trim((string)getenv('BRATONIEN_NC_CONFIG_DIR'));
+if ($configDir === '') $configDir = $nativeMode ? rtrim($piwigoRoot, '/').'/_data/bratonien-tools/nc-connector-runtime' : '/etc/bratonien-tools/nc-connector';
+$stateRoot = trim((string)getenv('BRATONIEN_NC_STATE_ROOT'));
+if ($stateRoot === '') $stateRoot = $nativeMode ? rtrim($piwigoRoot, '/').'/_data/bratonien-tools/nc-connector-state' : '/var/lib/bratonien-tools/nc-connector';
 $publicSourceRoot = rtrim($piwigoRoot, '/').'/_data/bratonien-tools/nc-webdav-source';
 $publicGalleryRoot = rtrim($piwigoRoot, '/').'/_data/bratonien-tools/nc-webdav-gallery';
 $legacyGalleryRoot = rtrim($piwigoRoot, '/').'/galleries';
@@ -107,11 +110,12 @@ try
  $rows = $db->query("SELECT id,name,adapter,config_json,secret_blob FROM `{$table}` ORDER BY id DESC");
  if (!$rows) fail_webdav_reconcile('Connector-Verbindungen konnten nicht gelesen werden: '.$db->error);

-  foreach (array($configDir, $publicSourceRoot, $publicGalleryRoot) as $dir)
+  foreach (array($configDir, $stateRoot, $publicSourceRoot, $publicGalleryRoot) as $dir)
  {
-    if (!is_dir($dir) && !mkdir($dir, $dir === $configDir ? 0700 : 0755, true)) fail_webdav_reconcile('Runtime-Verzeichnis konnte nicht angelegt werden: '.$dir);
+    if (!is_dir($dir) && !mkdir($dir, $dir === $configDir ? 0700 : 0750, true)) fail_webdav_reconcile('Runtime-Verzeichnis konnte nicht angelegt werden: '.$dir);
  }
  @chmod($configDir, 0700);
+  @chmod($stateRoot, 0750);
  @chmod($publicSourceRoot, 0755);
  @chmod($publicGalleryRoot, 0755);

@@ -150,7 +154,7 @@ try
      $seenFingerprints[$fingerprint] = $id;
      $known[$id] = true;

-      $stateDir = rtrim((string)($config['state_dir'] ?? ''), '/');
+      $stateDir = $nativeMode ? $stateRoot.'/connection-'.$id : rtrim((string)($config['state_dir'] ?? ''), '/');
      if ($stateDir === '') $stateDir = $stateRoot.'/connection-'.$id;
      if (!is_dir($stateDir) && !mkdir($stateDir, 0750, true)) fail_webdav_reconcile('State-Verzeichnis konnte nicht angelegt werden.');
      @chmod($stateDir, 0750);
@@ -219,7 +223,7 @@ try
      $config['parallel_gallery_root'] = $galleryRoot;
      $config['source_fingerprint'] = $fingerprint;
      $config['runtime'] = array(
-        'mode'=>'webdav',
+        'mode'=>$nativeMode ? 'piwigo-native-webdav' : 'webdav',
        'config'=>$configPath,
        'piwigo_sync_enabled'=>true,
        'reconciled_at'=>date('Y-m-d H:i:s'),
--- a/runtime/repair-webdav-cache-permissions.sh
+++ b/runtime/repair-webdav-cache-permissions.sh
@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+PIWIGO_ROOT="${1:-/var/www/piwigo}"
+PIWIGO_ROOT="${PIWIGO_ROOT%/}"
+DATA_DIR="$PIWIGO_ROOT/_data"
+
+[[ -d "$DATA_DIR" ]] || { echo "Piwigo-_data wurde nicht gefunden: $DATA_DIR" >&2; exit 1; }
+[[ "$(id -u)" -eq 0 ]] || { echo "Die Reparatur muss als root ausgeführt werden." >&2; exit 1; }
+
+DATA_UID="$(stat -c '%u' "$DATA_DIR")"
+DATA_GID="$(stat -c '%g' "$DATA_DIR")"
+
+PATHS=(
+  "$DATA_DIR/bratonien-tools/nc-webdav-gallery"
+  "$DATA_DIR/bratonien-tools/nc-webdav-preview"
+  "$DATA_DIR/i/_data/bratonien-tools/nc-webdav-gallery"
+  "$DATA_DIR/i/bratonien-watermark"
+)
+
+found=0
+for path in "${PATHS[@]}"; do
+  [[ -e "$path" ]] || continue
+  found=1
+  echo "Repariere: $path"
+  chown -R "$DATA_UID:$DATA_GID" -- "$path"
+  find "$path" -type d -exec chmod 2775 {} +
+  find "$path" -type f -exec chmod 0664 {} +
+done
+
+if [[ "$found" -eq 0 ]]; then
+  echo "Keine Bratonien-Cache-Verzeichnisse gefunden."
+  exit 0
+fi
+
+echo "Bratonien-Cache-Rechte wurden an $DATA_DIR angeglichen (UID $DATA_UID, GID $DATA_GID)."
--- a/runtime/run-all.sh
+++ b/runtime/run-all.sh
@@ -1,10 +1,26 @@
 #!/usr/bin/env bash
 set -Eeuo pipefail

-CONFIG_DIR="/etc/bratonien-tools/nc-connector"
 SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
+PIWIGO_ROOT_DEFAULT="${BRATONIEN_NC_PIWIGO_ROOT:-$(cd -- "$SCRIPT_DIR/../../.." && pwd)}"
+CONFIG_DIR="${BRATONIEN_NC_CONFIG_DIR:-/etc/bratonien-tools/nc-connector}"
+NATIVE_MODE="${BRATONIEN_NC_NATIVE:-0}"
+TARGET_CONNECTION_ID="${BRATONIEN_NC_CONNECTION_ID:-0}"
+GLOBAL_LOCK_DIR="${PIWIGO_ROOT_DEFAULT%/}/_data/bratonien-tools/nc-connector-scheduler"
+GLOBAL_LOCK_FILE="$GLOBAL_LOCK_DIR/worker.lock"
+mkdir -p -- "$GLOBAL_LOCK_DIR"
+exec 8>"$GLOBAL_LOCK_FILE"
+if ! flock -n 8; then
+    echo "NC Connector: ein Lauf ist bereits aktiv."
+    exit 0
+fi
 shopt -s nullglob

+if [[ ! "$TARGET_CONNECTION_ID" =~ ^[0-9]+$ ]]; then
+    echo "NC Connector: ungültige Ziel-Verbindungs-ID: $TARGET_CONNECTION_ID" >&2
+    exit 1
+fi
+
 read_config_value() {
    local key="$1"
    local file="$2"
@@ -39,10 +55,14 @@ write_route_status() {
    ' "$ROUTE_STATUS_FILE" "$route" "$label" "$detail" "$success"
 }

-php "$SCRIPT_DIR/reconcile.php"
+if [[ "$NATIVE_MODE" != "1" ]]; then
+    php "$SCRIPT_DIR/reconcile.php"
+fi
 php "$SCRIPT_DIR/reconcile-webdav.php"
 php "$SCRIPT_DIR/cleanup-webdav-piwigo.php"
-php "$SCRIPT_DIR/cleanup-stale.php"
+if [[ "$NATIVE_MODE" != "1" ]]; then
+    php "$SCRIPT_DIR/cleanup-stale.php"
+fi

 configs=("$CONFIG_DIR"/connection-*.conf)
 webdav_configs=("$CONFIG_DIR"/webdav-connection-*.conf)
@@ -55,16 +75,21 @@ fi
 route_piwigo_root=""
 for candidate in "${webdav_configs[@]}" "${configs[@]}"; do
    [[ -f "$candidate" ]] || continue
+    candidate_id="$(read_config_value CONNECTION_ID "$candidate")"
+    if [[ "$TARGET_CONNECTION_ID" -gt 0 && "$candidate_id" != "$TARGET_CONNECTION_ID" ]]; then
+        continue
+    fi
    route_piwigo_root="$(read_config_value PIWIGO_ROOT "$candidate")"
    [[ -n "$route_piwigo_root" ]] && break
 done
-[[ -n "$route_piwigo_root" ]] || route_piwigo_root="/var/www/piwigo"
+[[ -n "$route_piwigo_root" ]] || route_piwigo_root="$PIWIGO_ROOT_DEFAULT"
 ROUTE_STATUS_FILE="${route_piwigo_root%/}/_data/bratonien-tools/nc-connector-status/route-status.json"

 failure_count=0
 webdav_count=0
 local_count=0
 summary_parts=()
+matched_count=0

 for config in "${webdav_configs[@]}"; do
    [[ -f "$config" ]] || continue
@@ -76,7 +101,11 @@ for config in "${webdav_configs[@]}"; do
        summary_parts+=("$name: ungueltige Verbindungs-ID")
        continue
    fi
+    if [[ "$TARGET_CONNECTION_ID" -gt 0 && "$connection_id" != "$TARGET_CONNECTION_ID" ]]; then
+        continue
+    fi

+    matched_count=$((matched_count + 1))
    webdav_count=$((webdav_count + 1))
    echo "NC Connector WebDAV #$connection_id: $name"
    output=""
@@ -91,43 +120,55 @@ for config in "${webdav_configs[@]}"; do
    fi
 done

-for config in "${configs[@]}"; do
-    [[ -f "$config" ]] || continue
-    name="$(basename "$config")"
-    connection_id="0"
-    if [[ "$name" =~ ^connection-([0-9]+)\.conf$ ]]; then
-        connection_id="${BASH_REMATCH[1]}"
-    fi
-    if [[ "$connection_id" -lt 1 ]]; then
-        echo "NC Connector: $name besitzt keine gueltige Verbindungs-ID." >&2
-        failure_count=$((failure_count + 1))
-        summary_parts+=("$name: ungueltige Verbindungs-ID")
-        continue
-    fi
+if [[ "$NATIVE_MODE" != "1" ]]; then
+    for config in "${configs[@]}"; do
+        [[ -f "$config" ]] || continue
+        name="$(basename "$config")"
+        connection_id="0"
+        if [[ "$name" =~ ^connection-([0-9]+)\.conf$ ]]; then
+            connection_id="${BASH_REMATCH[1]}"
+        fi
+        if [[ "$connection_id" -lt 1 ]]; then
+            echo "NC Connector: $name besitzt keine gueltige Verbindungs-ID." >&2
+            failure_count=$((failure_count + 1))
+            summary_parts+=("$name: ungueltige Verbindungs-ID")
+            continue
+        fi
+        if [[ "$TARGET_CONNECTION_ID" -gt 0 && "$connection_id" != "$TARGET_CONNECTION_ID" ]]; then
+            continue
+        fi

-    piwigo_root="$(read_config_value PIWIGO_ROOT "$config")"
-    [[ -n "$piwigo_root" ]] || piwigo_root="/var/www/piwigo"
-    tombstone_dir="${piwigo_root%/}/_data/bratonien-tools/nc-connector-status"
-    if [[ -f "$tombstone_dir/deleted-$connection_id" ]]; then
-        echo "NC Connector: Verbindung $connection_id wurde geloescht; Laufzeitdateien werden entfernt."
-        rm -f -- "$CONFIG_DIR/connection-$connection_id.conf" \
-            "$CONFIG_DIR/connection-$connection_id.db-password" \
-            "$CONFIG_DIR/connection-$connection_id.piwigo-password" \
-            "$CONFIG_DIR/connection-$connection_id.storages.tsv" \
-            "$CONFIG_DIR/connection-$connection_id.roots.tsv"
-        rm -f -- "$tombstone_dir/deleted-$connection_id"
-        continue
-    fi
+        matched_count=$((matched_count + 1))
+        piwigo_root="$(read_config_value PIWIGO_ROOT "$config")"
+        [[ -n "$piwigo_root" ]] || piwigo_root="$PIWIGO_ROOT_DEFAULT"
+        tombstone_dir="${piwigo_root%/}/_data/bratonien-tools/nc-connector-status"
+        if [[ -f "$tombstone_dir/deleted-$connection_id" ]]; then
+            echo "NC Connector: Verbindung $connection_id wurde geloescht; Laufzeitdateien werden entfernt."
+            rm -f -- "$CONFIG_DIR/connection-$connection_id.conf" \
+                "$CONFIG_DIR/connection-$connection_id.db-password" \
+                "$CONFIG_DIR/connection-$connection_id.piwigo-password" \
+                "$CONFIG_DIR/connection-$connection_id.storages.tsv" \
+                "$CONFIG_DIR/connection-$connection_id.roots.tsv"
+            rm -f -- "$tombstone_dir/deleted-$connection_id"
+            continue
+        fi

-    local_count=$((local_count + 1))
-    echo "NC Connector Local #$connection_id: $name"
-    if env PIWIGO_CONFIG="$config" bash "$SCRIPT_DIR/sync.sh"; then
-        summary_parts+=("Local #$connection_id erfolgreich")
-    else
-        failure_count=$((failure_count + 1))
-        summary_parts+=("Local #$connection_id fehlgeschlagen")
-    fi
-done
+        local_count=$((local_count + 1))
+        echo "NC Connector Local #$connection_id: $name"
+        if env PIWIGO_CONFIG="$config" bash "$SCRIPT_DIR/sync.sh"; then
+            summary_parts+=("Local #$connection_id erfolgreich")
+        else
+            failure_count=$((failure_count + 1))
+            summary_parts+=("Local #$connection_id fehlgeschlagen")
+        fi
+    done
+fi
+
+if [[ "$TARGET_CONNECTION_ID" -gt 0 && "$matched_count" -eq 0 ]]; then
+    write_route_status "failed" "FEHLER - Verbindung #$TARGET_CONNECTION_ID" "Keine Laufzeitkonfiguration für Verbindung #$TARGET_CONNECTION_ID gefunden." "0"
+    echo "NC Connector: keine Laufzeitkonfiguration für Verbindung #$TARGET_CONNECTION_ID gefunden." >&2
+    exit 1
+fi

 summary_detail="$(IFS='; '; printf '%s' "${summary_parts[*]}")"
 [[ -n "$summary_detail" ]] || summary_detail="Keine Verbindung wurde ausgefuehrt."
@@ -144,10 +185,10 @@ if [[ "$failure_count" -eq 0 ]]; then
        label="Local"
    fi
    write_route_status "$route" "$label" "$summary_detail" "1"
-    echo "NC Connector: alle Verbindungen wurden erfolgreich verarbeitet."
+    echo "NC Connector: angeforderte Verbindung wurde erfolgreich verarbeitet."
    exit 0
 fi

-write_route_status "failed" "FEHLER - mindestens eine Verbindung" "$summary_detail" "0"
-echo "NC Connector: mindestens eine Verbindung ist fehlgeschlagen." >&2
+write_route_status "failed" "FEHLER - angeforderte Verbindung" "$summary_detail" "0"
+echo "NC Connector: die angeforderte Verbindung ist fehlgeschlagen." >&2
 exit 1
--- a/runtime/sync-webdav.sh
+++ b/runtime/sync-webdav.sh
@@ -75,8 +75,12 @@ done < "$WEBDAV_ROOTS_FILE"

 [[ ${#ROOT_ARGS[@]} -gt 0 ]] || { write_status error "Keine WebDAV-Wurzeln konfiguriert"; exit 1; }

+WEBDAV_CONNECT_IP="$(php "$SCRIPT_DIR/lib/resolve-nextcloud-target.php" "$WEBDAV_BASE_URL")"
+[[ -n "$WEBDAV_CONNECT_IP" ]] || { write_status error "Nextcloud-Zieladresse konnte nicht ermittelt werden"; exit 1; }
+
 python3 "$SCRIPT_DIR/lib/build_webdav_placeholder_source.py" \
    --base-url "$WEBDAV_BASE_URL" \
+    --connect-ip "$WEBDAV_CONNECT_IP" \
    --user "$WEBDAV_USER" \
    --password-file "$WEBDAV_PASSWORD_FILE" \
    "${ROOT_ARGS[@]}" \
@@ -134,21 +138,33 @@ if [[ "${PIWIGO_SYNC_ENABLED:-0}" == "1" ]]; then
        exit "$PIWIGO_EXIT"
    fi

-    MEDIA_UNIT="bratonien-nc-media-${CONNECTION_ID}-$(date +%s)"
-    if ! systemd-run \
-        --quiet \
-        --collect \
-        --unit="$MEDIA_UNIT" \
-        --property=RuntimeMaxSec=30min \
-        --setenv="PIWIGO_CONFIG=$CONFIG_FILE" \
-        /usr/bin/env bash "$SCRIPT_DIR/build-webdav-media.sh"; then
-        write_status error "Bildaufbereitung konnte nicht im Hintergrund gestartet werden"
-        exit 1
+    if [[ "${BRATONIEN_NC_NATIVE:-0}" == "1" ]]; then
+        if command -v timeout >/dev/null 2>&1; then
+            if ! timeout 30m env PIWIGO_CONFIG="$CONFIG_FILE" bash "$SCRIPT_DIR/build-webdav-media.sh"; then
+                write_status error "Bildaufbereitung ist fehlgeschlagen oder hat das 30-Minuten-Limit erreicht"
+                exit 1
+            fi
+        elif ! env PIWIGO_CONFIG="$CONFIG_FILE" bash "$SCRIPT_DIR/build-webdav-media.sh"; then
+            write_status error "Bildaufbereitung ist fehlgeschlagen"
+            exit 1
+        fi
+    else
+        MEDIA_UNIT="bratonien-nc-media-${CONNECTION_ID}-$(date +%s)"
+        if ! systemd-run \
+            --quiet \
+            --collect \
+            --unit="$MEDIA_UNIT" \
+            --property=RuntimeMaxSec=30min \
+            --setenv="PIWIGO_CONFIG=$CONFIG_FILE" \
+            /usr/bin/env bash "$SCRIPT_DIR/build-webdav-media.sh"; then
+            write_status error "Bildaufbereitung konnte nicht im Hintergrund gestartet werden"
+            exit 1
+        fi
    fi

    if grep -q 'Piwigo-Synchronisierung per API erfolgreich' <<<"$PIWIGO_OUTPUT"; then
        write_status ok \
-            "WebDAV eingelesen und Piwigo synchronisiert; Bildaufbereitung läuft im Hintergrund" \
+            "WebDAV eingelesen und Piwigo synchronisiert; Bildaufbereitung abgeschlossen" \
            "" \
            "api" \
            "ok" \
@@ -157,7 +173,7 @@ if [[ "${PIWIGO_SYNC_ENABLED:-0}" == "1" ]]; then
            "Fallback wurde nicht benötigt"
    elif grep -q 'Piwigo-Datenbanksynchronisierung per Benutzername/Passwort-Fallback erfolgreich' <<<"$PIWIGO_OUTPUT"; then
        write_status ok \
-            "WebDAV eingelesen und Piwigo über Fallback synchronisiert; Bildaufbereitung läuft im Hintergrund" \
+            "WebDAV eingelesen und Piwigo über Fallback synchronisiert; Bildaufbereitung abgeschlossen" \
            "" \
            "fallback" \
            "not_used" \
@@ -165,7 +181,7 @@ if [[ "${PIWIGO_SYNC_ENABLED:-0}" == "1" ]]; then
            "ok" \
            "Benutzername/Passwort-Fallback erfolgreich"
    else
-        write_status ok "WebDAV eingelesen und Piwigo synchronisiert; Bildaufbereitung läuft im Hintergrund"
+        write_status ok "WebDAV eingelesen und Piwigo synchronisiert; Bildaufbereitung abgeschlossen"
    fi
 else
    write_status ok "WebDAV eingelesen; Piwigo-Synchronisierung ist für diese Verbindung deaktiviert"
--- a/template/admin_tabs.tpl
+++ b/template/admin_tabs.tpl
@@ -9,13 +9,7 @@
 .bratonien-tab-panel { width:100%; max-width:none; margin-left:0 !important; margin-right:0 !important; }
 .bratonien-tab-panel[hidden] { display:none !important; }
 .bratonien-card { margin-left:0; margin-right:0; }
-.bratonien-edit-dialog { width:min(920px,calc(100vw - 3rem)); max-height:88vh; overflow:auto; background:#444; color:inherit; border:1px solid #777; border-radius:4px; padding:0; box-shadow:0 18px 60px rgba(0,0,0,.55); }
-.bratonien-edit-dialog::backdrop { background:rgba(0,0,0,.55); }
-.bratonien-edit-dialog__body { padding:1.25rem 1.5rem; }
-.bratonien-storage-row { display:grid; grid-template-columns:minmax(120px,.7fr) minmax(150px,1fr) minmax(240px,1.5fr) auto; gap:.5rem; align-items:end; margin:.5rem 0; }
-.bratonien-storage-row label { display:flex; flex-direction:column; gap:.25rem; }
-.bratonien-storage-row input { width:100%; box-sizing:border-box; }
-@media (max-width:760px) { .bratonien-tabs{gap:5px}.bratonien-tab{border-bottom:1px solid rgba(255,255,255,.16);border-radius:4px;margin-bottom:0;padding:9px 11px}.bratonien-storage-row{grid-template-columns:1fr} }
+@media (max-width:760px) { .bratonien-tabs{gap:5px}.bratonien-tab{border-bottom:1px solid rgba(255,255,255,.16);border-radius:4px;margin-bottom:0;padding:9px 11px} }
 </style>
 <div id="bratonien-tabs-anchor"></div>
 <script>
@@ -59,19 +53,15 @@

    function token(){var input=section.querySelector('input[name="pwg_token"]');return input?input.value:'';}
    function setOpen(value){try{if(value)sessionStorage.setItem(storageKey,'1');else sessionStorage.removeItem(storageKey);}catch(e){}}
+    function setMode(value){try{if(value)sessionStorage.setItem(modeKey,value);else sessionStorage.removeItem(modeKey);}catch(e){}}
    function mode(){try{return sessionStorage.getItem(modeKey)||'';}catch(e){return '';}}
-    function clearMode(){try{sessionStorage.removeItem(modeKey);}catch(e){}}
    function applyMode(){
      if(!dialog)return;
-      var current=mode();
      var heading=dialog.querySelector('h4');
      var finish=dialog.querySelector('button[value="nc_connector_wizard_finish"]');
-      if(current==='edit'){
+      if(mode()==='edit'){
        if(heading)heading.textContent='Verbindung bearbeiten';
        if(finish)finish.textContent='Änderungen speichern';
-      }else if(current==='migrate'){
-        if(heading)heading.textContent='Auf WebDAV migrieren';
-        if(finish)finish.textContent='Migration starten';
      }else{
        if(heading)heading.textContent='Neue Verbindung';
        if(finish)finish.textContent='Verbindung anlegen';
@@ -90,13 +80,13 @@
      return fetch(window.location.href,{method:'POST',credentials:'same-origin',cache:'no-store',headers:{'Content-Type':'application/x-www-form-urlencoded;charset=UTF-8'},body:body.toString()});
    }
    function closeAfterReset(){
-      if(resetBusy)return;resetBusy=true;setOpen(false);clearMode();
+      if(resetBusy)return;resetBusy=true;setOpen(false);setMode('');
      resetServer().catch(function(){}).finally(function(){resetBusy=false;if(dialog){if(typeof dialog.close==='function'&&dialog.open)dialog.close();else dialog.removeAttribute('open');}});
    }

    if(openButton){
      openButton.addEventListener('click',function(event){
-        event.preventDefault();event.stopImmediatePropagation();clearMode();showWizard();
+        event.preventDefault();event.stopImmediatePropagation();setMode('');showWizard();
      },true);
    }
    if(closeButton){
@@ -105,111 +95,33 @@
    if(dialog){
      dialog.addEventListener('cancel',function(event){event.preventDefault();event.stopImmediatePropagation();closeAfterReset();},true);
      dialog.addEventListener('click',function(event){if(event.target===dialog){event.preventDefault();event.stopImmediatePropagation();closeAfterReset();}},true);
+
      [].slice.call(dialog.querySelectorAll('form[data-bratonien-wizard-form]')).forEach(function(form){
        form.addEventListener('submit',function(event){
          var submitter=event.submitter;
          setOpen(true);
          if(submitter&&submitter.hasAttribute('data-bratonien-wizard-end')){
            setOpen(false);
-            if(submitter.value==='nc_connector_wizard_reset')clearMode();
+            if(submitter.value==='nc_connector_wizard_reset'||submitter.value==='nc_connector_wizard_finish')setMode('');
          }
        },true);
      });
+
+      [].slice.call(section.querySelectorAll('form')).forEach(function(form){
+        var editButton=form.querySelector('button[value="nc_connector_edit_start"]');
+        if(!editButton)return;
+        form.addEventListener('submit',function(event){
+          if(event.submitter&&event.submitter.value==='nc_connector_edit_start'){
+            setMode('edit');setOpen(true);
+          }
+        },true);
+      });
+
      try{if(sessionStorage.getItem(storageKey)==='1')showWizard();}catch(e){}
      applyMode();
    }
  }

-  function initNCConnectionEditing(){
-    var section=document.getElementById('nc-connector');if(!section)return;
-    var modeKey='bratonienNcWizardMode';
-    var pwgTokenInput=section.querySelector('input[name="pwg_token"]');
-    var pwgToken=pwgTokenInput?pwgTokenInput.value:'';
-
-    function setMode(value){try{sessionStorage.setItem(modeKey,value);}catch(e){}}
-    function makePostButton(label,tool,id,modeValue){
-      var form=document.createElement('form');form.method='post';form.style.display='inline';
-      var token=document.createElement('input');token.type='hidden';token.name='pwg_token';token.value=pwgToken;form.appendChild(token);
-      var connection=document.createElement('input');connection.type='hidden';connection.name='connection_id';connection.value=String(id);form.appendChild(connection);
-      var button=document.createElement('button');button.type='submit';button.className='buttonLike';button.name='bratonien_tool';button.value=tool;button.textContent=label;
-      if(modeValue)form.addEventListener('submit',function(){setMode(modeValue);});
-      form.appendChild(button);return form;
-    }
-    function escapeHtml(value){return String(value==null?'':value).replace(/[&<>"']/g,function(c){return {'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#039;'}[c];});}
-    function localEditorDialog(){
-      var dialog=document.getElementById('bratonien-nc-local-edit-dialog');
-      if(dialog)return dialog;
-      dialog=document.createElement('dialog');dialog.id='bratonien-nc-local-edit-dialog';dialog.className='bratonien-edit-dialog';
-      dialog.innerHTML='<div class="bratonien-edit-dialog__body"><div style="display:flex;align-items:center;justify-content:space-between;gap:1rem"><div><h4 style="margin:0">Verbindung bearbeiten</h4><p class="bratonien-base-note" style="margin:.35rem 0 0">Bestehende Legacy-Verbindung. Änderungen werden in derselben Verbindung gespeichert.</p></div><button type="button" class="buttonLike" data-local-edit-close>Schließen</button></div><div data-local-edit-content style="margin-top:1rem"></div></div>';
-      document.body.appendChild(dialog);
-      dialog.querySelector('[data-local-edit-close]').addEventListener('click',function(){dialog.close();});
-      dialog.addEventListener('click',function(event){if(event.target===dialog)dialog.close();});
-      return dialog;
-    }
-    function storageRow(storage){
-      return '<div class="bratonien-storage-row" data-storage-row>'+
-        '<label>Storage-ID<input name="nc_storage_id[]" value="'+escapeHtml(storage.storage_id||'')+'" required></label>'+
-        '<label>Quellordner<input name="nc_source_prefix[]" value="'+escapeHtml(storage.source_prefix||'')+'" placeholder="optional"></label>'+
-        '<label>Lokaler Speicherpfad<input name="nc_local_mount[]" value="'+escapeHtml(storage.local_mount||'')+'" required></label>'+
-        '<button type="button" class="buttonLike" data-remove-storage>Entfernen</button></div>';
-    }
-    function openLocalEditor(id){
-      var dialog=localEditorDialog();
-      var content=dialog.querySelector('[data-local-edit-content]');
-      content.innerHTML='<p class="bratonien-base-note">Verbindung wird geladen …</p>';
-      if(typeof dialog.showModal==='function')dialog.showModal();else dialog.setAttribute('open','open');
-      fetch('plugins/bratonien_tools/nc-connector-edit-data.php?connection_id='+encodeURIComponent(id)+'&_='+Date.now(),{credentials:'same-origin',cache:'no-store',headers:{'Accept':'application/json'}})
-        .then(function(response){return response.json().then(function(data){if(!response.ok)throw new Error(data.error||('HTTP '+response.status));return data;});})
-        .then(function(data){
-          if(data.adapter!=='local')throw new Error('Diese Verbindung ist keine Legacy-Verbindung.');
-          var legacy=data.legacy||{};var storages=Array.isArray(legacy.storages)?legacy.storages:[];
-          var rows=storages.map(storageRow).join('');
-          if(!rows)rows=storageRow({});
-          content.innerHTML='<form method="post" data-local-edit-form>'+
-            '<input type="hidden" name="pwg_token" value="'+escapeHtml(pwgToken)+'">'+
-            '<input type="hidden" name="connection_id" value="'+escapeHtml(data.id)+'">'+
-            '<div class="bratonien-form-grid">'+
-              '<label class="bratonien-label">Name</label><input name="connection_name" value="'+escapeHtml(data.name)+'" required>'+
-              '<label class="bratonien-label">Datenbank-Server</label><input name="nc_host" value="'+escapeHtml(legacy.host)+'" required>'+
-              '<label class="bratonien-label">Port</label><input name="nc_port" type="number" min="1" max="65535" value="'+escapeHtml(legacy.port||5432)+'" required>'+
-              '<label class="bratonien-label">Datenbank</label><input name="nc_database" value="'+escapeHtml(legacy.database)+'" required>'+
-              '<label class="bratonien-label">Reader-Benutzer</label><input name="nc_user" value="'+escapeHtml(legacy.user)+'" required>'+
-              '<label class="bratonien-label">Reader-Passwort</label><input name="nc_db_password" type="password" autocomplete="new-password" placeholder="leer = unverändert">'+
-            '</div>'+
-            '<h5 style="margin-top:1rem">Speicherorte</h5><p class="bratonien-base-note">Jeder Speicherort wird einzeln bearbeitet. Es ist kein Pipe-/Textformat erforderlich.</p><div data-storage-list>'+rows+'</div><button type="button" class="buttonLike" data-add-storage>Speicherort hinzufügen</button>'+
-            '<details style="margin-top:1rem"><summary>Erweiterte Legacy-Einstellungen</summary><div class="bratonien-form-grid" style="margin-top:.75rem">'+
-              '<label class="bratonien-label">Source-View</label><input name="nc_source_view" value="'+escapeHtml(legacy.source_view)+'" required>'+
-              '<label class="bratonien-label">Activity-View</label><input name="nc_activity_view" value="'+escapeHtml(legacy.activity_view)+'" required>'+
-              '<label class="bratonien-label">Piwigo-Galerieordner</label><input name="nc_gallery_root" value="'+escapeHtml(legacy.gallery_root)+'" required>'+
-              '<label class="bratonien-label">Ruhezeit (Sek.)</label><input name="nc_quiet_seconds" type="number" min="0" value="'+escapeHtml(legacy.quiet_seconds)+'">'+
-              '<label class="bratonien-label">Maximale Wartezeit (Sek.)</label><input name="nc_max_wait_seconds" type="number" min="60" value="'+escapeHtml(legacy.max_wait_seconds)+'">'+
-              '<label class="bratonien-label">Vollprüfung nach (Sek.)</label><input name="nc_full_sync_seconds" type="number" min="300" value="'+escapeHtml(legacy.full_sync_seconds)+'">'+
-            '</div></details>'+
-            '<div class="bratonien-actions" style="margin-top:1rem"><button class="buttonLike" type="submit" name="bratonien_tool" value="nc_connector_update_local">Änderungen speichern</button><button class="buttonLike" type="button" data-local-edit-cancel>Abbrechen</button></div></form>';
-          var form=content.querySelector('[data-local-edit-form]');
-          form.querySelector('[data-local-edit-cancel]').addEventListener('click',function(){dialog.close();});
-          form.querySelector('[data-add-storage]').addEventListener('click',function(){form.querySelector('[data-storage-list]').insertAdjacentHTML('beforeend',storageRow({}));});
-          form.addEventListener('click',function(event){var remove=event.target.closest('[data-remove-storage]');if(remove){var row=remove.closest('[data-storage-row]');if(row)row.remove();}});
-        })
-        .catch(function(error){content.innerHTML='<p class="bratonien-main-cache__warning"><strong>Bearbeiten nicht möglich:</strong> '+escapeHtml(error.message||String(error))+'</p>';});
-    }
-
-    [].slice.call(section.querySelectorAll('button[value="nc_connector_edit_start"]')).forEach(function(button){var form=button.closest('form');if(form)form.remove();});
-
-    [].slice.call(section.querySelectorAll('button[value="nc_connector_delete"]')).forEach(function(deleteButton){
-      var deleteForm=deleteButton.closest('form');var card=deleteButton.closest('details');if(!deleteForm||!card)return;
-      var idInput=deleteForm.querySelector('input[name="connection_id"]');if(!idInput)return;var id=idInput.value;
-      var actions=deleteForm.parentElement;if(!actions)return;
-      var text=card.textContent||'';var isLocal=text.indexOf('bestehende Legacy-Konfiguration')!==-1;
-      if(isLocal){
-        var edit=document.createElement('button');edit.type='button';edit.className='buttonLike';edit.textContent='Bearbeiten';edit.addEventListener('click',function(){openLocalEditor(id);});actions.insertBefore(edit,deleteForm);
-        actions.insertBefore(makePostButton('Auf WebDAV migrieren','nc_connector_migrate_start',id,'migrate'),deleteForm);
-      }else{
-        actions.insertBefore(makePostButton('Bearbeiten','nc_connector_edit_start',id,'edit'),deleteForm);
-      }
-    });
-  }
-
  function initNCConnectorPolling(){
    var section=document.getElementById('nc-connector');if(!section)return;
    var endpoint='plugins/bratonien_tools/nc-connector-status.php';
@@ -262,7 +174,7 @@
    poll();schedule();
  }

-  function initAll(){initBratonienTabs();initNCWizardLifecycle();initNCConnectionEditing();initNCConnectorPolling();}
+  function initAll(){initBratonienTabs();initNCWizardLifecycle();initNCConnectorPolling();}
  if(document.readyState==='loading')document.addEventListener('DOMContentLoaded',initAll);else initAll();
 })();
 </script>
--- a/webdav-image.php
+++ b/webdav-image.php
@@ -8,6 +8,7 @@ if (!defined('BRATONIEN_TOOLS_PATH'))
  define('BRATONIEN_TOOLS_PATH', PHPWG_ROOT_PATH.'plugins/'.BRATONIEN_TOOLS_ID.'/');
 }
 require_once(BRATONIEN_TOOLS_PATH.'include/webdav_image_runtime.inc.php');
+require_once(BRATONIEN_TOOLS_PATH.'include/nc_transport.inc.php');

 function bratonien_tools_webdav_image_abort($status, $message)
 {
@@ -120,7 +121,7 @@ $options = array(
  CURLOPT_USERPWD => $user.':'.$password,
  CURLOPT_RETURNTRANSFER => false,
  CURLOPT_FAILONERROR => false,
-  CURLOPT_USERAGENT => 'Bratonien-Tools-WebDAV-Image/0.9.6.1',
+  CURLOPT_USERAGENT => 'Bratonien-Tools-WebDAV-Image/0.9.7.16',
  CURLOPT_HEADERFUNCTION => function($ch, $line)
  {
    $length = strlen($line);
@@ -147,6 +148,7 @@ $options = array(
    return strlen($data);
  },
 );
+bratonien_tools_nc_transport_apply_curl($options, $url);
 if (!empty($_SERVER['HTTP_RANGE']))
 {
  $range = trim((string)$_SERVER['HTTP_RANGE']);
Author	SHA1	Message	Date
Terranom674	0adcc5ca54	Merge pull request #40 from Terranom674/fix/09718-restore-pre-ui-behavior 0.9.7.18: konsistente Kernfunktionen und einheitliche NC-UI wiederherstellen	2026-08-20 00:02:17 +02:00
Terranom674	61988db337	Restore single-path NC admin UI	2026-08-19 23:59:56 +02:00
Terranom674	bdfea105cf	Keep request-local watermark performance cache	2026-08-19 23:58:13 +02:00
Terranom674	6f64cb9fe6	Restore stable admin tab behavior	2026-08-19 23:57:24 +02:00
Terranom674	65b068814f	Unify stale WebDAV cleanup across historical connector paths	2026-08-19 23:55:04 +02:00
Terranom674	e58d2c700a	Clean missing images across all connection path generations	2026-08-19 23:54:35 +02:00
Terranom674	afaea3b424	Delete all known path variants for one WebDAV connection	2026-08-19 23:54:17 +02:00
Terranom674	7a763ba62a	Reduce WebDAV builder to metadata refresh only	2026-08-19 23:53:38 +02:00
Terranom674	31e29db7c2	Remove obsolete destructive legacy reset	2026-08-19 23:53:11 +02:00
Terranom674	ab116d29c2	Remove destructive legacy reset from updates	2026-08-19 23:49:54 +02:00
Terranom674	46924db618	Remove parallel NC source picker endpoint	2026-08-19 23:49:36 +02:00
Terranom674	6e96b0adc3	Remove parallel NC edit save endpoint	2026-08-19 23:49:28 +02:00
Terranom674	b8f3ed44a3	Remove parallel NC edit data endpoint	2026-08-19 23:49:21 +02:00
Terranom674	cb3b2f258c	Disable parallel NC editor layer	2026-08-19 23:49:13 +02:00
Terranom674	ef1c1265a9	0.9.7.18: restore stable non-connector hooks	2026-08-19 23:48:40 +02:00
Terranom674	47d7000cc8	Restore stable watermark settings	2026-08-19 23:48:16 +02:00
Terranom674	c358c157e4	Restore stable watermark profile behavior	2026-08-19 23:48:06 +02:00
Terranom674	1d62dc17e8	Restore stable album watermark rules	2026-08-19 23:47:46 +02:00
Terranom674	ad4c281fdc	Restore stable watermark engine	2026-08-19 23:47:31 +02:00
Terranom674	a43a15a9d3	Restore stable watermark runtime	2026-08-19 23:47:13 +02:00
Terranom674	31b8590e4a	Merge pull request #39 from Terranom674/fix/09717-remove-missing-webdav-images 0.9.7.17: entfernte Freigaben sicher aus Piwigo bereinigen	2026-08-19 23:28:36 +02:00
Terranom674	c772010137	Version 0.9.7.17	2026-08-19 23:27:41 +02:00
Terranom674	d075d05708	0.9.7.17: Verbindungsloeschung ueber eigene Gallery-Root	2026-08-19 23:27:09 +02:00
Terranom674	a4fb7421f0	0.9.7.17: Bereinigung nur nach erfolgreichem WebDAV-Abruf	2026-08-19 23:26:53 +02:00
Terranom674	9da08b5d8e	0.9.7.17: fehlende Connector-Bilder nach erfolgreichem Abruf bereinigen	2026-08-19 23:26:37 +02:00
Terranom674	f28365b0ca	Merge pull request #38 from Terranom674/fix/09716-native-piwigo-source 0.9.7.16: WebDAV-Bilder wieder über Piwigos nativen Derivatpfad laden	2026-08-19 23:07:42 +02:00
Terranom674	fb6c1a03d2	0.9.7.16: vorhandene Preview-Caches ohne Massendownload weiterverwenden	2026-08-19 23:06:11 +02:00
Terranom674	98d0471683	0.9.7.16: WebDAV-Bildendpoint wieder auf Originalauslieferung begrenzen	2026-08-19 23:05:14 +02:00
Terranom674	63eba888f8	0.9.7.16: native Piwigo-Derivatlogik wiederherstellen	2026-08-19 23:04:51 +02:00
Terranom674	748b0e986d	0.9.7.16: widersprüchlichen WebDAV-Derivat-Hook entfernen	2026-08-19 23:04:34 +02:00
Terranom674	c1281ad077	0.9.7.16: eigenen WebDAV-Derivat-Endpunkt entfernen	2026-08-19 23:04:26 +02:00
Terranom674	bc0593642c	0.9.7.16: echte NC-Previews als lokale Piwigo-Quelle verwenden	2026-08-19 23:04:06 +02:00
Terranom674	9052076fd7	Merge pull request #37 from Terranom674/fix/09715-piwigo-ajax-loader 0.9.7.15: Piwigo-AJAX-Lader für WebDAV-Bilder reparieren	2026-08-19 22:59:33 +02:00
Terranom674	5772a59b55	Bump version to 0.9.7.15	2026-08-19 22:58:34 +02:00
Terranom674	84762154d6	Return JSON for Piwigo AJAX image loader	2026-08-19 22:58:17 +02:00
Terranom674	1580c235a8	Fix Piwigo AJAX loader response for WebDAV derivatives	2026-08-19 22:57:56 +02:00
Terranom674	4aac5ca4a2	Merge pull request #36 from Terranom674/fix/09714-cache-permissions 0.9.7.14: WebDAV-Cache-Rechte reparieren	2026-08-19 22:48:56 +02:00
Terranom674	ab1f20beef	0.9.7.14: Einmalige Cache-Rechtereparatur	2026-08-19 22:48:00 +02:00
Terranom674	f94a001006	Version 0.9.7.14	2026-08-19 22:47:45 +02:00
Terranom674	3f64895f8e	0.9.7.14: Connector-Cache-Rechte normalisieren	2026-08-19 22:47:20 +02:00
Terranom674	48f1eacce7	Merge pull request #35 from Terranom674/fix/09713-watermark-album-overview 0.9.7.13: Wasserzeichen in Albumübersicht nach Albumregel	2026-08-19 22:43:07 +02:00
Terranom674	7c8c7ab98a	Purge stale watermark cache once on 0.9.7.13	2026-08-19 22:42:24 +02:00
Terranom674	ade38ff2d1	Clear watermark cache after profile changes	2026-08-19 22:42:01 +02:00
Terranom674	6a013fe875	Clear watermark cache after album rule changes	2026-08-19 22:41:36 +02:00
Terranom674	c71112d94e	Invalidate watermark cache on rule changes	2026-08-19 22:41:20 +02:00
Terranom674	7d97e1b515	Register album overview watermark context	2026-08-19 22:39:08 +02:00
Terranom674	47afbc7f43	Fix watermark context for album overview covers	2026-08-19 22:38:54 +02:00
Terranom674	706639a57e	Merge pull request #34 from Terranom674/fix/09712-ondemand-missing-preview 0.9.7.12: On-Demand-Altbilder nicht mehr auf 404 hängen lassen	2026-08-19 22:36:50 +02:00
Terranom674	c7b14add33	0.9.7.12: Version anheben	2026-08-19 22:35:53 +02:00
Terranom674	f9e87df305	0.9.7.12: fehlende On-Demand-Previews auf echtes WebDAV-Bild zurueckfallen	2026-08-19 22:35:25 +02:00
Terranom674	6ba5eb4d7f	Merge pull request #33 from Terranom674/fix/09711-fotorama-ondemand 0.9.7.11: Fotorama-Derivate on demand erzeugen	2026-08-19 22:32:15 +02:00
Terranom674	85369fa15e	Version 0.9.7.11	2026-08-19 22:31:13 +02:00
Terranom674	981ba6c18b	0.9.7.11: On-Demand WebDAV Derivat Endpoint	2026-08-19 22:30:52 +02:00
Terranom674	77e20af977	0.9.7.11: Fotorama Derivate erst bei Abruf erzeugen	2026-08-19 22:30:34 +02:00
Terranom674	e187c517da	Merge pull request #32 from Terranom674/fix/09710-never-serve-connector-placeholders 0.9.7.10: Connector-Platzhalter nie im Frontend ausliefern	2026-08-19 22:27:47 +02:00
Terranom674	28e34d6c73	0.9.7.10: Version anheben	2026-08-19 22:26:54 +02:00
Terranom674	b8852310bd	0.9.7.10: Connector-Platzhalter nie als Derivat ausliefern	2026-08-19 22:26:37 +02:00
Terranom674	ae96fc2e3e	Merge pull request #31 from Terranom674/fix/0979-picture-derivatives 0.9.7.9: Picture-Viewer lädt WebDAV-Derivate lokal	2026-08-19 22:17:54 +02:00
Terranom674	ebf4fc7e74	0.9.7.9: Plugin-Version anheben	2026-08-19 22:16:46 +02:00
Terranom674	d798b82ec7	0.9.7.9: Picture-Derivate lokal aus NC-Preview erzeugen	2026-08-19 22:16:26 +02:00
Terranom674	9e282af1b4	Merge pull request #30 from Terranom674/fix/0978-modus-gallery-derivative 0.9.7.8: Modus-Galeriederivat beim Sync vorbauen	2026-08-19 22:03:53 +02:00
Terranom674	d7628d1dac	Version auf 0.9.7.8 setzen	2026-08-19 22:02:59 +02:00
Terranom674	7e9c3ae05f	0.9.7.8: Modus-Galeriederivat vorab erzeugen	2026-08-19 22:02:43 +02:00
Terranom674	b64e46a549	Merge pull request #29 from Terranom674/fix/0974-gallery-derivative-only 0.9.7.7: Connector-Altbestand einmalig zurücksetzen	2026-08-19 21:50:57 +02:00
Terranom674	779ba80dfe	Jetzt-abgleichen global und verbindungsbezogen erlauben	2026-08-19 21:50:18 +02:00
Terranom674	ebbc183f87	Globalen Jetzt-abgleichen-Lauf erhalten	2026-08-19 21:49:45 +02:00
Terranom674	f3b5002f4d	run-all auf angeforderte Verbindung filtern	2026-08-19 21:48:05 +02:00
Terranom674	6c393bbcfc	Native Runner auf einzelne Verbindung begrenzen	2026-08-19 21:47:40 +02:00
Terranom674	829381676d	Manuellen Abgleich auf ausgewählte Verbindung begrenzen	2026-08-19 21:47:25 +02:00
Terranom674	6382cee491	Jetzt-abgleichen verbindungsbezogen starten	2026-08-19 21:47:01 +02:00
Terranom674	69c3932e9b	CI für 0.9.7.7 auslösen	2026-08-19 21:45:16 +02:00
Terranom674	747a76c066	Altbestand beim Update auf 0.9.7.7 einmalig bereinigen	2026-08-19 21:45:06 +02:00
Terranom674	5024757136	Einmaligen Connector-Altbestand-Reset ergänzen	2026-08-19 21:44:52 +02:00
Terranom674	5125d2e247	0.9.7.7 vorbereiten	2026-08-19 21:44:39 +02:00
Terranom674	6607c4aefe	Merge pull request #28 from Terranom674/fix/0974-gallery-derivative-only 0.9.7.6: Galerie-Hotpath entlasten	2026-08-19 21:38:09 +02:00
Terranom674	32f2ceaaec	cleanup: temporaeren CI-Trigger entfernen	2026-08-19 21:37:19 +02:00
Terranom674	5a5669d976	ci: trigger 0.9.7.6	2026-08-19 21:36:46 +02:00
Terranom674	e4ab277cfc	0.9.7.6: Wasserzeichen-Engine pro Request nur einmal initialisieren	2026-08-19 21:36:37 +02:00
Terranom674	9e07cd8042	0.9.7.6: Request-Scheduler aus Galeriepfad entfernen	2026-08-19 21:35:50 +02:00
Terranom674	588f1fc100	0.9.7.6: WebDAV-Hotpath pro Request cachen	2026-08-19 21:35:06 +02:00
Terranom674	a23fc81190	Merge pull request #27 from Terranom674/fix/0974-gallery-derivative-only 0.9.7.5: Alt-Derivate reparieren und Galerie beschleunigen	2026-08-19 21:30:24 +02:00
Terranom674	ff5af83e65	Rebuild only mismatched legacy gallery derivatives	2026-08-19 21:29:31 +02:00
Terranom674	c61d8e32cc	Use fast WebDAV gallery derivative filter	2026-08-19 21:28:47 +02:00
Terranom674	38c4955f70	Add fast WebDAV gallery derivative path	2026-08-19 21:28:29 +02:00
Terranom674	5c217288a8	Bump version to 0.9.7.5	2026-08-19 21:27:17 +02:00
Terranom674	17c79ce8ab	Restore branch to 0.9.7.4 baseline	2026-08-19 21:27:03 +02:00
Terranom674	7746d26c9f	Remove accidental temporary file	2026-08-19 21:26:47 +02:00
Terranom674	d05ab28549	noop	2026-08-19 21:26:19 +02:00
Terranom674	55b5be56b6	Merge pull request #26 from Terranom674/fix/0974-gallery-derivative-only 0.9.7.4: nur Galeriederivat beim WebDAV-Import	2026-08-19 21:23:35 +02:00
Terranom674	ba0b5af417	Release 0.9.7.4	2026-08-19 21:12:39 +02:00
Terranom674	315af9641c	Build only gallery derivative from WebDAV preview	2026-08-19 21:12:24 +02:00
Terranom674	77ae007a28	Merge pull request #25 from Terranom674/fix/0973-webdav-root-altimports 0.9.7.3: Altimporte aus WebDAV-Stammverzeichnis reparieren	2026-08-19 21:02:13 +02:00
Terranom674	e5be2b3043	Release 0.9.7.3	2026-08-19 21:01:26 +02:00
Terranom674	3fe9527537	Fix root WebDAV alt-import derivative detection	2026-08-19 21:01:00 +02:00
Terranom674	fb1f12d608	0.9.7.2: sichtbarer Abgleich und sicherer WebDAV-Import 0.9.7.2: sichtbarer Abgleich und sicherer WebDAV-Import	2026-08-19 20:53:28 +02:00
Terranom674	017cbdbd3b	0.9.7.2: private Alben nicht von öffentlichen Regeln erben lassen	2026-08-19 20:52:16 +02:00
Terranom674	9aaa1a47b3	0.9.7.2: WebDAV-Sync nicht-destruktiv machen	2026-08-19 20:51:23 +02:00
Terranom674	fc3d855e5e	0.9.7.2: Version anheben	2026-08-19 20:49:18 +02:00
Terranom674	4847d2ff11	0.9.7.2: aktuellen Schedulerstatus in Statuskarte spiegeln	2026-08-19 20:48:48 +02:00
Terranom674	0b405e9efb	0.9.7.2: Abgleich sofort als angefordert markieren	2026-08-19 20:48:25 +02:00
Terranom674	2c302b356d	Merge pull request #23 from Terranom674/fix/0971-webdav-public-ip 0.9.7.1: WebDAV über öffentliche Ziel-IP	2026-08-19 20:43:19 +02:00
Terranom674	5c62dbd9be	0.9.7.1: clean pinned WebDAV resolver implementation	2026-08-19 20:41:46 +02:00
Terranom674	5f81cc9ce9	0.9.7.1: bump plugin version	2026-08-19 20:40:57 +02:00
Terranom674	a5be16f88e	0.9.7.1: stream WebDAV originals through resolved target IP	2026-08-19 20:40:40 +02:00
Terranom674	6b082ba8b5	0.9.7.1: fetch WebDAV previews through resolved target IP	2026-08-19 20:40:19 +02:00
Terranom674	5396f50bc0	0.9.7.1: resolve remote Nextcloud target before WebDAV scan	2026-08-19 20:39:54 +02:00
Terranom674	a54df74e67	0.9.7.1: pin WebDAV runtime to resolved target IP	2026-08-19 20:39:27 +02:00
Terranom674	986eb530d7	0.9.7.1: scan remote Nextcloud through resolved IP transport	2026-08-19 20:38:52 +02:00
Terranom674	b9adcbddac	0.9.7.1: use transport-aware WebDAV wizard handlers	2026-08-19 20:38:25 +02:00
Terranom674	bb434b9b02	0.9.7.1: route wizard and WebDAV calls through resolved target IP	2026-08-19 20:37:59 +02:00
Terranom674	aa5c2f7f0c	0.9.7.1: add runtime Nextcloud target resolver	2026-08-19 20:37:23 +02:00
Terranom674	aa803a4149	0.9.7.1: add generic Nextcloud transport resolver	2026-08-19 20:35:40 +02:00
Terranom674	ad39b9f0d2	Merge pull request #22 from Terranom674/fix/09630-native-piwigo-scheduler 0.9.6.30: NC Connector nativ in Piwigo ausführen	2026-08-19 20:18:39 +02:00
Terranom674	aa8beb3794	0.9.6.30: globales Lauf-Lock gegen Parallelstarts	2026-08-19 20:17:47 +02:00
Terranom674	3ad6e9eb8e	0.9.6.30: globales Lauf-Lock an run-all übergeben	2026-08-19 20:17:24 +02:00
Terranom674	21118f6fb3	0.9.6.30: Bildaufbereitung ohne systemd im nativen Modus	2026-08-19 20:16:48 +02:00
Terranom674	c23302197a	0.9.6.30: WebDAV-Runtime unter Piwigo _data ablegen	2026-08-19 20:16:19 +02:00
Terranom674	d54aa482f7	0.9.6.30: Runtime für nativen Piwigo-Scheduler vorbereiten	2026-08-19 20:15:41 +02:00
Terranom674	25133bc895	0.9.6.30: Jetzt-abgleichen auf nativen Scheduler umstellen	2026-08-19 20:15:22 +02:00
Terranom674	62cc1af8bf	0.9.6.30: Status auf nativen Piwigo-Scheduler umstellen	2026-08-19 20:14:56 +02:00
Terranom674	cf300bc5c3	0.9.6.30: Scheduler beim Plugin-Lifecycle initialisieren	2026-08-19 20:14:33 +02:00
Terranom674	0dde87cda0	0.9.6.30: nativen Scheduler beim Plugin laden	2026-08-19 20:14:21 +02:00
Terranom674	17a76c4de2	0.9.6.30: nativen Connector-Runner hinzufügen	2026-08-19 20:14:05 +02:00
Terranom674	2366f6366c	0.9.6.30: nativen Piwigo-Scheduler hinzufügen	2026-08-19 20:13:47 +02:00
Terranom674	43780cb9a3	Merge pull request #21 from Terranom674/fix/09629-stability-rollback 0.9.6.29: Shadowtree stabilisieren	2026-08-19 19:59:15 +02:00