Main update

2026-06-24 02:24:39 +02:00
parent 5ff4c3fb2b
commit d121f74bd0
34 changed files with 2548 additions and 67 deletions
--- a/config/apps.php
+++ b/config/apps.php
@@ -14,6 +14,8 @@ return [
        'supports_widget' => false,
        'supports_tray' => false,
        'module_name' => 'system',
+        'app_scope' => 'core',
+        'installable' => false,
        'summary' => 'Startpunkt der Desktop-Shell mit Status zur Architektur, Skin-Umschaltung und naechsten Schritten.',
    ],
    [
@@ -27,6 +29,8 @@ return [
        'supports_widget' => true,
        'supports_tray' => false,
        'module_name' => 'desktop',
+        'app_scope' => 'core',
+        'installable' => false,
        'summary' => 'Oeffentliche Startansicht fuer nicht eingeloggte Nutzer.',
    ],
    [
@@ -40,6 +44,8 @@ return [
        'supports_widget' => false,
        'supports_tray' => false,
        'module_name' => 'desktop',
+        'app_scope' => 'core',
+        'installable' => false,
        'summary' => 'Vorbereitung fuer mehrere persoenliche Dashboards und Workspace-Verwaltung.',
    ],
    [
@@ -55,6 +61,8 @@ return [
        'supports_widget' => true,
        'supports_tray' => false,
        'module_name' => 'desktop',
+        'app_scope' => 'system_tool',
+        'installable' => false,
        'summary' => 'Persoenliche Einstellungen fuer Desktop-Typ, Benutzerdaten, Apps und Widgets in einem gemeinsamen Setup-Bereich.',
        'native_module' => [
            'initializer' => 'initUserSelfManagementApp',
@@ -80,6 +88,8 @@ return [
        'supports_widget' => false,
        'supports_tray' => true,
        'module_name' => 'admin',
+        'app_scope' => 'core',
+        'installable' => false,
        'summary' => 'Platzhalter fuer globale Verwaltung von Apps, Widgets, Integrationen und Suchmaschinen.',
    ],
    [
@@ -91,9 +101,12 @@ return [
        'content_mode' => 'native-module',
        'default_width' => 1180,
        'default_height' => 760,
+        'show_on_desktop' => false,
        'supports_widget' => false,
        'supports_tray' => true,
        'module_name' => 'admin',
+        'app_scope' => 'system_tool',
+        'installable' => false,
        'required_groups' => ['administrators'],
        'summary' => 'Benutzerverwaltung fuer Freischaltungen, Aktivierung, Deaktivierung und Passwort-Reset.',
        'native_module' => [
@@ -111,6 +124,38 @@ return [
            ],
        ],
    ],
+    [
+        'app_id' => 'cron-management',
+        'title' => 'Cron Tool',
+        'icon' => 'CR',
+        'entry_route' => '/admin/cron/',
+        'window_mode' => 'window',
+        'content_mode' => 'native-module',
+        'default_width' => 1220,
+        'default_height' => 820,
+        'show_on_desktop' => false,
+        'supports_widget' => false,
+        'supports_tray' => false,
+        'module_name' => 'admin',
+        'app_scope' => 'system_tool',
+        'installable' => false,
+        'required_groups' => ['administrators'],
+        'summary' => 'Zentrale Verwaltung fuer moduluebergreifende Cron-Jobs, Zeitplaene und manuelle Testlaeufe.',
+        'native_module' => [
+            'initializer' => 'initCronManagementApp',
+            'options' => [
+                'entryRoute' => '/admin/cron/',
+            ],
+            'assets' => [
+                'styles' => [
+                    ['href' => '/assets/apps/cron-management/app.css'],
+                ],
+                'scripts' => [
+                    ['src' => '/assets/apps/cron-management/app.js'],
+                ],
+            ],
+        ],
+    ],
    [
        'app_id' => 'desktop-login',
        'title' => 'Desktop Login',
@@ -122,6 +167,8 @@ return [
        'supports_widget' => false,
        'supports_tray' => false,
        'module_name' => 'auth',
+        'app_scope' => 'core',
+        'installable' => false,
        'summary' => 'Uebergabepunkt fuer das spaetere Keycloak-Theme im Desktop-Look.',
    ],
 ];
--- a/config/widgets.php
+++ b/config/widgets.php
@@ -55,19 +55,4 @@ return [
        'summary' => 'Platz fuer persoenliche Hinweise und Notizen je Workspace.',
        'content' => 'Dieser Bereich ist vorbereitet, aber standardmaessig noch nicht eingeblendet.',
    ],
-    [
-        'widget_id' => 'fx-rates-refresh',
-        'title' => 'Waehrungskurse',
-        'icon' => 'FX',
-        'zone' => 'sidebar',
-        'default_enabled' => true,
-        'supports_public_home' => false,
-        'summary' => 'Aktuelle FX-Kurse pruefen und bei Bedarf manuell aktualisieren.',
-        'content' => 'Ein API-Abruf wird nur ausgefuehrt, wenn der letzte Snapshot alt genug ist, ausser bei explizitem Force.',
-        'launch_app_id' => 'fx-rates',
-        'action_label' => 'App oeffnen',
-        'widget_type' => 'fx-rates-refresh',
-        'status_api' => '/api/fx-rates/index.php?path=v1/status',
-        'refresh_api' => '/api/fx-rates/index.php?path=v1/refresh',
-    ],
 ];
--- a/docs/ANLEITUNG.md
+++ b/docs/ANLEITUNG.md
@@ -29,12 +29,13 @@ Das Startmenue ist in drei Bereiche gegliedert:
 2. `Funktion-Bereich`
   Hier werden die Funktionsgruppen ausgewaehlt. Aktuell ist `Programme` die erste Gruppe.
 3. `Auswahlbereich`
-   Hier erscheinen die Inhalte der aktuell gewaehlten Funktionsgruppe, zum Beispiel installierte Apps.
+   Hier erscheinen die Inhalte der aktuell gewaehlten Funktionsgruppe, gruppiert nach `Desktop`, `Systemtools` und `Modulen`.

 ## Programme oeffnen

 - Desktop-Icons koennen direkt geoeffnet werden.
 - Im Startmenue lassen sich Programme ueber den `Auswahlbereich` starten.
+- `Systemtools` erscheinen dort getrennt von installierbaren `Modulen`.
 - Fenster koennen verschoben, minimiert, maximiert und geschlossen werden.
 - Programme koennen sowohl globale System-Apps als auch klassische Module sein.

@@ -71,6 +72,14 @@ Aktuell gilt:
 - Modul-Businesslogik bleibt im Modul und wird nicht in den Desktop-Core verschoben
 - gemeinsame Desktop-Mechaniken wie Fenster, Asset-Einbindung und Zugriffsschutz werden global bereitgestellt

+## Widgets und Cronjobs
+
+- Widgets koennen von Modulen bereitgestellt werden, wenn das Modul diese Funktion im Manifest hinterlegt.
+- Widget-Funktionen stehen nur dann zur Auswahl, wenn die zugehoerige App fuer den Benutzer installiert oder aktiviert ist.
+- Das `Cron Tool` ist ein globales `Systemtool` fuer Administratoren.
+- Dort erscheinen Modul-Cronjobs automatisch, sobald ein Modul sie in `module.json` hinterlegt.
+- Cron-Aufrufe laufen auf demselben Host und verwenden dieselbe Projektbasis wie der Desktop.
+
 ## Waehrungs-Checker

 Der `Waehrungs-Checker` verwaltet gespeicherte Wechselkurse, Kurs-Historie, Umrechnungen und manuelle Aktualisierung.
--- a/docs/README.md
+++ b/docs/README.md
@@ -58,3 +58,6 @@ Aktuell wichtig:
 - das gemeinsame Admin-Debug-Widget neben der Uhr ist der Standard fuer Live-Debugging in Desktop und Native-Apps
 - der Waehrungs-Checker stellt zusaetzlich ein Desktop-Widget fuer manuelle Kursaktualisierung bereit
 - das Oeffnen des Waehrungs-Checkers darf keinen externen Kursabruf ausloesen; Refreshes laufen nur nach Altersregel oder mit `force`
+- `Systemtools` und installierbare `Module` werden getrennt behandelt; Systemtools sind nicht Teil der Benutzer-Installationsauswahl
+- das `Cron Tool` ist als globales Systemtool vorhanden und sammelt Modul-Cronjobs automatisch ueber Manifest-Metadaten
+- Widgets und Cron-Endpunkte sollen von Modulen bevorzugt direkt in `module.json` beschrieben werden
--- a/docs/Umsetzungsanweisung/03_MIGRATION_BESTEHENDE_MODULE.md
+++ b/docs/Umsetzungsanweisung/03_MIGRATION_BESTEHENDE_MODULE.md
@@ -79,3 +79,33 @@ Wenn `Old-Nexus/` vorhanden ist:
 - `supports_widget`
 - `supports_tray`
 - `module_name`
+
+## Erweiterte Modul-Metadaten fuer die neue Desktop-Shell
+
+Importierte Module sollen bei der Migration nicht nur eine Fenster-App bekommen, sondern moeglichst direkt folgende Angaben im Manifest vorbereiten:
+
+- `app_scope: module`
+- `installable: true`
+- `desktop.available`
+- `desktop.show_on_desktop`
+- `desktop.show_in_start_menu`
+- `widgets[]`
+- `cron_jobs[]`
+
+Damit koennen folgende Dinge ohne weitere Sonderverdrahtung automatisch entstehen:
+
+- Desktop- und Startmenue-Sichtbarkeit
+- Widget-Auswahl im User Self Management
+- Aufnahme in die zentrale Cron-Verwaltung
+
+## Systemtools sind keine Module
+
+Globale Verwaltungsfunktionen werden in diesem Projekt nicht als installierbare Module behandelt.
+
+Beispiele:
+
+- `User Management`
+- `User Self Management`
+- `Cron Tool`
+
+Diese Apps laufen als `system_tool` und nicht als `module`.
--- a/docs/WEITERENTWICKLUNG.md
+++ b/docs/WEITERENTWICKLUNG.md
@@ -38,6 +38,8 @@ Verbindlich ist:
 - importierte Module mit eigener API ueber konsistente `public/api/<modul>/index.php`-Shims an die gemeinsame Desktop-Auth anbinden
 - importierte Module mit eigener Fensterseite ueber konsistente `public/apps/<modul>/index.php`-Shims anbinden
 - Widget-Logik einer App muss dieselben fachlichen Regeln wie die App-API verwenden, nicht eigene Sonderwege
+- Systemtools duerfen nicht als installierbare Module modelliert werden
+- neue Modul-Widgets und Modul-Cronjobs sollen ueber Manifest-Metadaten registriert werden statt ueber versteckte Sonderlisten

 ## NoGo's

@@ -60,6 +62,8 @@ Verbindlich ist:
 - globale Debug-Steuerung fuer Admins liegt im Desktop-Core; Aktivierung erfolgt ueber das gemeinsame Debug-Widget neben der Uhr
 - API und Desktop teilen sich im aktuellen Zielbild denselben Host; offizielle Basis ist `/api/v1/...`
 - App, API und Widget einer Fachfunktion muessen dieselben Sperr- und Force-Regeln fuer externe Abrufe nutzen
+- die Trennung `core` / `system_tool` / `module` ist in Metadaten, Startmenue und Benutzer-Setup konsistent zu halten
+- Cron-Endpunkte muessen auf demselben Host laufen und duerfen keine separate Standard-API-Domain voraussetzen
 - Skins definieren Darstellung und Interaktionsdetails, nicht die Fachlogik
 - Hilfe- und Inhaltsdateien sollen spaeter maschinenlesbar oder zumindest klar strukturierbar in einen Hilfebereich ueberfuehrt werden koennen

--- a/modules/README.md
+++ b/modules/README.md
@@ -13,9 +13,44 @@ Ein Desktop-Modul kann zusaetzlich diese Projektdateien besitzen:
 - `api/` fuer modulinterne HTTP-Endpunkte
 - `assets/` fuer modulnahe CSS- und JS-Dateien
 - `docs/README.md` fuer modulspezifische Hinweise, API und Sonderregeln
+- `module.json` fuer Setup, Desktop-Freigabe, Widget-Funktionen und Cron-Endpunkte

 Module-Assets werden in diesem Projekt nicht direkt aus `public/assets/apps/...` dupliziert, sondern ueber den generischen Endpoint `/module-assets/index.php` aus dem jeweiligen Modul ausgeliefert.

+## Trennung zwischen Systemtools und Modulen
+
+- `Systemtools` sind globale Verwaltungs- und Setup-Apps und nicht installierbar
+- aktuelle Beispiele: `User Management`, `User Self Management`, `Cron Tool`
+- `Module` sind installierbare Fachanwendungen
+- aktuelle Beispiele: `Mining-Checker`, `Waehrungs-Checker`, `Boersenchecker`, `Pi-hole`
+
+Diese Trennung wird ueber App-Metadaten gesteuert:
+
+- `app_scope`
+  - `core`
+  - `system_tool`
+  - `module`
+- `installable`
+  - `false` fuer Core- und Systemtools
+  - `true` fuer installierbare Module
+
+## Modul-Metadaten in `module.json`
+
+Module sollen ihre Desktop-Faehigkeiten zentral in `module.json` beschreiben.
+
+Wichtige Bausteine:
+
+- `desktop`
+  - `available`
+  - `show_on_desktop`
+  - `show_in_start_menu`
+- `widgets`
+  - beschreibt Widget-Funktionen, die nur fuer installierte Module verfuegbar sind
+- `cron_jobs`
+  - beschreibt Cron-Endpunkte fuer die zentrale Cron-Verwaltung
+
+Die Desktop-Shell liest diese Angaben automatisch ein. Neue Modul-Crons und Widgets muessen deshalb nicht zusaetzlich in einer separaten globalen Liste nachgetragen werden, solange sie sauber im Manifest beschrieben sind.
+
 ## Globale Desktop-Standards fuer Module

 - gemeinsame Desktop-Mechaniken wie Fenster, Tray, globale Persistenz und Debug-Infrastruktur liegen im Desktop-Core
--- a/modules/boersenchecker/api/index.php
+++ b/modules/boersenchecker/api/index.php
@@ -23,6 +23,84 @@ if ($normalized === 'v1/chart-data') {
    return;
 }

+if ($normalized === 'v1/cron/refresh-quotes' && strtoupper((string) ($_SERVER['REQUEST_METHOD'] ?? 'GET')) === 'POST') {
+    header('Content-Type: application/json; charset=utf-8');
+    try {
+        $result = module_fn('boersenchecker', 'scheduled_refresh_quotes', [
+            'trigger_source' => 'cron',
+        ]);
+        http_response_code(!empty($result['ok']) ? 200 : 500);
+        echo json_encode($result, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+    } catch (\Throwable $exception) {
+        http_response_code(500);
+        echo json_encode([
+            'ok' => false,
+            'message' => $exception->getMessage(),
+        ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+    }
+    return;
+}
+
+if ($normalized === 'v1/widget/refresh-quotes' && strtoupper((string) ($_SERVER['REQUEST_METHOD'] ?? 'GET')) === 'POST') {
+    header('Content-Type: application/json; charset=utf-8');
+    try {
+        $result = module_fn('boersenchecker', 'scheduled_refresh_quotes', [
+            'trigger_source' => 'widget',
+        ]);
+        http_response_code(!empty($result['ok']) ? 200 : 500);
+        echo json_encode($result, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+    } catch (\Throwable $exception) {
+        http_response_code(500);
+        echo json_encode([
+            'ok' => false,
+            'message' => $exception->getMessage(),
+        ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+    }
+    return;
+}
+
+if ($normalized === 'v1/widget/status' && strtoupper((string) ($_SERVER['REQUEST_METHOD'] ?? 'GET')) === 'GET') {
+    header('Content-Type: application/json; charset=utf-8');
+    try {
+        $pdo = module_fn('boersenchecker', 'pdo');
+        $quoteTable = module_fn('boersenchecker', 'table', 'quotes');
+        $instrumentTable = module_fn('boersenchecker', 'table', 'instruments');
+        $positionTable = module_fn('boersenchecker', 'table', 'positions');
+        $settings = modules()->settings('boersenchecker');
+
+        $latestAt = $pdo->query('SELECT MAX(quoted_at) FROM ' . $quoteTable)->fetchColumn();
+        $countStmt = $pdo->query(
+            'SELECT COUNT(DISTINCT i.id)
+             FROM ' . $positionTable . ' p
+             INNER JOIN ' . $instrumentTable . ' i ON i.id = p.instrument_id
+             WHERE i.symbol IS NOT NULL
+               AND i.symbol <> \'\''
+        );
+        $trackedCount = (int) ($countStmt->fetchColumn() ?: 0);
+
+        $statusText = $latestAt
+            ? 'Letzter Kursabruf: ' . date('d.m.Y H:i', strtotime((string) $latestAt)) . ' · ' . $trackedCount . ' Titel'
+            : 'Noch keine gespeicherten Kurse vorhanden.';
+
+        echo json_encode([
+            'ok' => true,
+            'data' => [
+                'status_text' => $statusText,
+                'latest_quoted_at' => $latestAt,
+                'tracked_instruments' => $trackedCount,
+                'report_currency' => (string) ($settings['report_currency'] ?? 'EUR'),
+            ],
+        ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+    } catch (\Throwable $exception) {
+        http_response_code(500);
+        echo json_encode([
+            'ok' => false,
+            'message' => $exception->getMessage(),
+        ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+    }
+    return;
+}
+
 http_response_code(404);
 header('Content-Type: application/json; charset=utf-8');
 echo json_encode([
--- a/modules/boersenchecker/module.json
+++ b/modules/boersenchecker/module.json
@@ -3,6 +3,52 @@
  "version": "0.2.0",
  "description": "Depotverwaltung fuer Aktien, Kaufdaten, Kursverlauf und Waehrungsumrechnung.",
  "enabled_by_default": true,
+  "app_scope": "module",
+  "installable": true,
+  "desktop": {
+    "available": true,
+    "show_on_desktop": true,
+    "show_in_start_menu": true
+  },
+  "widgets": [
+    {
+      "widget_id": "boersenchecker-refresh",
+      "title": "Boersenkurse",
+      "icon": "BC",
+      "zone": "sidebar",
+      "default_enabled": false,
+      "supports_public_home": false,
+      "summary": "Kurse fuer hinterlegte Depot-Positionen manuell nachziehen.",
+      "content": "Widget fuer Schnellabruf des letzten Kursstatus und manuellen Marktrefresh.",
+      "launch_app_id": "boersenchecker",
+      "action_label": "App oeffnen",
+      "widget_type": "action-panel",
+      "status_api": "/api/boersenchecker/index.php?path=v1/widget/status",
+      "actions": [
+        {
+          "action_id": "refresh-quotes",
+          "label": "Kurse abrufen",
+          "endpoint": "/api/boersenchecker/index.php?path=v1/widget/refresh-quotes",
+          "method": "POST"
+        }
+      ]
+    }
+  ],
+  "cron_jobs": [
+    {
+      "job_id": "refresh-quotes",
+      "label": "Boersenkurse aktualisieren",
+      "description": "Laedt fuer alle aktiven Depot-Positionen neue Alpha-Vantage-Kurse.",
+      "endpoint_path": "/api/boersenchecker/index.php?path=v1/cron/refresh-quotes",
+      "method": "POST",
+      "payload": {
+        "trigger_source": "cron"
+      },
+      "default_enabled": false,
+      "default_cron": "15 */6 * * 1-5",
+      "lock_minutes": 20
+    }
+  ],
  "setup": {
    "fields": [
      { "name": "use_separate_db", "label": "Eigene Modul-DB nutzen", "type": "checkbox", "required": false, "help": "Wenn aktiv, werden die DB-Daten unten verwendet. Sonst wird die Nexus-Base-DB genutzt." },
--- a/modules/fx-rates/module.json
+++ b/modules/fx-rates/module.json
@@ -4,6 +4,58 @@
  "version": "0.1.0",
  "description": "Zentrales Modul fuer Waehrungskurse, Historie, API-Abrufe und Desktop-Widget.",
  "enabled_by_default": true,
+  "app_scope": "module",
+  "installable": true,
+  "desktop": {
+    "available": true,
+    "show_on_desktop": true,
+    "show_in_start_menu": true
+  },
+  "widgets": [
+    {
+      "widget_id": "fx-rates-refresh",
+      "title": "Waehrungskurse",
+      "icon": "FX",
+      "zone": "sidebar",
+      "default_enabled": true,
+      "supports_public_home": false,
+      "summary": "Aktuelle FX-Kurse pruefen und bei Bedarf manuell aktualisieren.",
+      "content": "Ein API-Abruf wird nur ausgefuehrt, wenn der letzte Snapshot alt genug ist, ausser bei explizitem Force.",
+      "launch_app_id": "fx-rates",
+      "action_label": "App oeffnen",
+      "widget_type": "fx-rates-refresh",
+      "status_api": "/api/fx-rates/index.php?path=v1/status",
+      "refresh_api": "/api/fx-rates/index.php?path=v1/refresh"
+    }
+  ],
+  "cron_jobs": [
+    {
+      "job_id": "refresh-rates",
+      "label": "FX-Kurse aktualisieren",
+      "description": "Laedt neue Wechselkurse, sofern der letzte Snapshot nicht mehr frisch genug ist.",
+      "endpoint_path": "/api/fx-rates/index.php?path=v1/refresh",
+      "method": "POST",
+      "payload": {
+        "trigger_source": "cron"
+      },
+      "default_enabled": false,
+      "default_cron": "0 */6 * * *",
+      "lock_minutes": 15
+    },
+    {
+      "job_id": "sync-currency-catalog",
+      "label": "FX-Waehrungskatalog synchronisieren",
+      "description": "Aktualisiert den internen Waehrungskatalog des Moduls.",
+      "endpoint_path": "/api/fx-rates/index.php?path=v1/currency-catalog/sync",
+      "method": "POST",
+      "payload": {
+        "trigger_source": "cron"
+      },
+      "default_enabled": false,
+      "default_cron": "30 3 * * 1",
+      "lock_minutes": 30
+    }
+  ],
  "setup": {
    "sections": {
      "database": true
--- a/modules/mining-checker/module.json
+++ b/modules/mining-checker/module.json
@@ -4,6 +4,13 @@
  "version": "0.3.0",
  "description": "Erfassung, OCR-Auswertung und Analyse von DOGE-Mining-Messwerten als eingebettetes Modul.",
  "enabled_by_default": true,
+  "app_scope": "module",
+  "installable": true,
+  "desktop": {
+    "available": true,
+    "show_on_desktop": true,
+    "show_in_start_menu": true
+  },
  "setup": {
    "sections": {
      "database": true
--- a/modules/pihole/api/index.php
+++ b/modules/pihole/api/index.php
@@ -5,6 +5,7 @@ declare(strict_types=1);
 require_once dirname(__DIR__, 3) . '/src/App/bootstrap.php';
 require_once dirname(__DIR__) . '/bootstrap.php';

+use App\CronAuth;
 use ModulesCore\ModuleHttp;

 if (session_status() !== PHP_SESSION_ACTIVE) {
@@ -12,11 +13,15 @@ if (session_status() !== PHP_SESSION_ACTIVE) {
 }

 $projectRoot = dirname(__DIR__, 3);
-ModuleHttp::requireDesktopAccess($projectRoot, true);
+$action = (string)($_GET['action'] ?? '');
+$cronAllowedActions = ['gravity', 'update', 'widget_status'];
+$isCronRequest = in_array($action, $cronAllowedActions, true) && CronAuth::isAuthorizedRequest($projectRoot);
+
+if (!$isCronRequest) {
+    ModuleHttp::requireDesktopAccess($projectRoot, true);
+}

 header('Content-Type: application/json; charset=utf-8');
-
-$action = (string)($_GET['action'] ?? '');
 $instances = module_fn('pihole', 'instances');
 $listsPrimaryOnly = module_fn('pihole', 'lists_primary_only');
 $moduleSettings = modules()->settings('pihole');
@@ -36,6 +41,22 @@ $respond = function (array $data, int $status = 200): void {
    exit;
 };

+$requireAdminAccess = static function (bool $allowCron = false) use ($isCronRequest, $respond): void {
+    if ($allowCron && $isCronRequest) {
+        return;
+    }
+
+    $currentUser = is_array($_SESSION['desktop_auth']['user'] ?? null) ? $_SESSION['desktop_auth']['user'] : [];
+    $groups = array_map(
+        static fn (string $group): string => strtolower(trim($group, '/')),
+        array_values(array_map('strval', (array) ($currentUser['groups'] ?? [])))
+    );
+
+    if (!in_array('administrators', $groups, true)) {
+        $respond(['ok' => false, 'error' => 'forbidden'], 403);
+    }
+};
+
 $debugPush = static function (string $label, array $payload = []): void {
    module_debug_push('pihole', array_merge(['label' => $label], $payload));
 };
@@ -886,8 +907,31 @@ if ($action === 'dashboard') {
    ]);
 }

+if ($action === 'widget_status') {
+    $statusText = 'Keine Pi-hole-Instanzen konfiguriert.';
+    if (!empty($instances)) {
+        $primaryId = $resolvePrimaryId();
+        $primaryName = $primaryId !== null && isset($instances[$primaryId])
+            ? (string) ($instances[$primaryId]['name'] ?? $primaryId)
+            : (string) array_key_first($instances);
+        $statusText = sprintf(
+            '%d Instanz(en) hinterlegt · Primaer: %s',
+            count($instances),
+            $primaryName !== '' ? $primaryName : 'n/a'
+        );
+    }
+
+    $respond([
+        'ok' => true,
+        'data' => [
+            'status_text' => $statusText,
+            'instance_count' => count($instances),
+        ],
+    ]);
+}
+
 if ($action === 'test') {
-    require_admin();
+    $requireAdminAccess();
    $target = (string)($payload['instance'] ?? '');
    if ($target === '') {
        $respond(['ok' => false, 'error' => 'missing_instance'], 400);
@@ -988,7 +1032,7 @@ if ($action === 'test') {
 }

 if ($action === 'disable') {
-    require_admin();
+    $requireAdminAccess();
    $debugPush('disable.request', ['payload' => $payload]);
    $minutes = (int)($payload['minutes'] ?? 0);
    $target = (string)($payload['instance'] ?? 'all');
@@ -1021,7 +1065,7 @@ if ($action === 'disable') {
 }

 if ($action === 'enable') {
-    require_admin();
+    $requireAdminAccess();
    $debugPush('enable.request', ['payload' => $payload]);
    $target = (string)($payload['instance'] ?? 'all');
    $targets = $pickInstances($target);
@@ -1049,7 +1093,7 @@ if ($action === 'enable') {
 }

 if ($action === 'gravity') {
-    require_admin();
+    $requireAdminAccess(true);
    $debugPush('gravity.request', ['payload' => $payload]);
    $actionTimeout = $resolveActionTimeout();
    $target = $listsPrimaryOnly ? 'primary' : (string)($payload['instance'] ?? 'primary');
@@ -1075,7 +1119,7 @@ if ($action === 'gravity') {
 }

 if ($action === 'domain_add') {
-    require_admin();
+    $requireAdminAccess();
    $debugPush('domain_add.request', ['payload' => $payload]);
    $domain = trim((string)($payload['domain'] ?? ''));
    $type = (string)($payload['type'] ?? 'block');
@@ -1109,7 +1153,7 @@ if ($action === 'domain_add') {
 }

 if ($action === 'adlist_add') {
-    require_admin();
+    $requireAdminAccess();
    $debugPush('adlist_add.request', ['payload' => $payload]);
    $url = trim((string)($payload['url'] ?? ''));
    if ($url === '') {
@@ -1138,7 +1182,7 @@ if ($action === 'adlist_add') {
 }

 if ($action === 'update') {
-    require_admin();
+    $requireAdminAccess(true);
    $debugPush('update.request', ['payload' => $payload]);
    $actionTimeout = $resolveActionTimeout();
    $target = (string)($payload['instance'] ?? 'primary');
--- a/modules/pihole/module.json
+++ b/modules/pihole/module.json
@@ -3,6 +3,80 @@
  "version": "0.1.0",
  "description": "Pi-hole Monitoring, Listen und Steuerung fuer mehrere Instanzen.",
  "enabled_by_default": true,
+  "app_scope": "module",
+  "installable": true,
+  "desktop": {
+    "available": true,
+    "show_on_desktop": true,
+    "show_in_start_menu": true
+  },
+  "widgets": [
+    {
+      "widget_id": "pihole-maintenance",
+      "title": "Pi-hole Wartung",
+      "icon": "PH",
+      "zone": "sidebar",
+      "default_enabled": false,
+      "supports_public_home": false,
+      "summary": "Gravity-Update und Listen-Refresh direkt aus dem Desktop.",
+      "content": "Schnellaktionen fuer die Pflege der Pi-hole-Instanzen.",
+      "launch_app_id": "pihole",
+      "action_label": "App oeffnen",
+      "widget_type": "action-panel",
+      "status_api": "/api/pihole/index.php?action=widget_status",
+      "actions": [
+        {
+          "action_id": "gravity",
+          "label": "Gravity aktualisieren",
+          "endpoint": "/api/pihole/index.php?action=gravity",
+          "method": "POST",
+          "payload": {
+            "instance": "primary"
+          }
+        },
+        {
+          "action_id": "update",
+          "label": "Pi-hole updaten",
+          "endpoint": "/api/pihole/index.php?action=update",
+          "method": "POST",
+          "payload": {
+            "instance": "primary"
+          },
+          "variant": "secondary"
+        }
+      ]
+    }
+  ],
+  "cron_jobs": [
+    {
+      "job_id": "gravity-primary",
+      "label": "Pi-hole Gravity Update",
+      "description": "Aktualisiert die Blocklisten auf der Primaer-Instanz.",
+      "endpoint_path": "/api/pihole/index.php?action=gravity",
+      "method": "POST",
+      "payload": {
+        "instance": "primary",
+        "trigger_source": "cron"
+      },
+      "default_enabled": false,
+      "default_cron": "20 4 * * *",
+      "lock_minutes": 30
+    },
+    {
+      "job_id": "update-primary",
+      "label": "Pi-hole Systemupdate",
+      "description": "Startet ein Update der Primaer-Instanz.",
+      "endpoint_path": "/api/pihole/index.php?action=update",
+      "method": "POST",
+      "payload": {
+        "instance": "primary",
+        "trigger_source": "cron"
+      },
+      "default_enabled": false,
+      "default_cron": "50 4 * * 0",
+      "lock_minutes": 45
+    }
+  ],
  "setup": {
    "fields": [
      {
--- a/public/admin/cron/index.php
+++ b/public/admin/cron/index.php
@@ -0,0 +1,338 @@
+<?php
+
+declare(strict_types=1);
+
+require_once dirname(__DIR__, 3) . '/src/App/bootstrap.php';
+
+use App\ConfigLoader;
+use App\CronManagementService;
+use App\KeycloakAuth;
+use ModulesCore\ModuleRegistry;
+
+if (session_status() !== PHP_SESSION_ACTIVE) {
+    session_start();
+}
+
+$projectRoot = dirname(__DIR__, 3);
+$auth = new KeycloakAuth(ConfigLoader::load($projectRoot, 'keycloak'));
+if (!$auth->isAuthenticated()) {
+    header('Location: /auth/keycloak', true, 302);
+    exit;
+}
+
+$currentUser = is_array($_SESSION['desktop_auth']['user'] ?? null) ? $_SESSION['desktop_auth']['user'] : [];
+$currentGroups = array_map(
+    static fn (string $group): string => strtolower(trim($group, '/')),
+    array_values(array_map('strval', (array) ($currentUser['groups'] ?? [])))
+);
+$isPartial = !empty($_GET['partial']);
+
+if (!in_array('administrators', $currentGroups, true)) {
+    http_response_code(403);
+    $forbidden = '<div class="window-app-shell cm-shell"><div class="window-app-frame cm-frame"><main class="window-app-main cm-main"><div class="window-app-panel cm-panel"><section class="window-app-card cm-card"><p class="cm-message is-error">Kein Zugriff auf Cron Tool.</p></section></div></main></div></div>';
+    if ($isPartial) {
+        echo $forbidden;
+        return;
+    }
+
+    ?><!DOCTYPE html>
+    <html lang="de">
+    <head>
+        <meta charset="utf-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <title>Cron Tool</title>
+        <link rel="stylesheet" href="/assets/desktop/desktop.css">
+        <link rel="stylesheet" href="/assets/apps/cron-management/app.css">
+    </head>
+    <body><?= $forbidden ?></body>
+    </html><?php
+    return;
+}
+
+$csrfToken = (string) ($_SESSION['cron_management_token'] ?? '');
+if ($csrfToken === '') {
+    $csrfToken = bin2hex(random_bytes(16));
+    $_SESSION['cron_management_token'] = $csrfToken;
+}
+
+$baseUrlFallback = ((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https' : 'http')
+    . '://'
+    . ($_SERVER['HTTP_HOST'] ?? 'localhost');
+
+$service = new CronManagementService($projectRoot, new ModuleRegistry($projectRoot . '/modules'));
+$messages = [];
+$errors = [];
+
+if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+    $postedToken = (string) ($_POST['csrf_token'] ?? '');
+
+    if ($postedToken === '' || !hash_equals($csrfToken, $postedToken)) {
+        $errors[] = 'Die Formularpruefung ist fehlgeschlagen.';
+    } else {
+        $action = (string) ($_POST['action'] ?? '');
+
+        try {
+            if ($action === 'save-global') {
+                $service->saveGlobal([
+                    'base_url' => (string) ($_POST['base_url'] ?? ''),
+                    'default_timezone' => (string) ($_POST['default_timezone'] ?? ''),
+                ], $baseUrlFallback);
+                $messages[] = 'Globale Cron-Einstellungen gespeichert.';
+            } elseif ($action === 'regenerate-token') {
+                $service->regenerateToken($baseUrlFallback);
+                $messages[] = 'Cron-Token wurde neu erzeugt.';
+            } elseif ($action === 'run-due') {
+                $results = $service->runDue($baseUrlFallback);
+                if ($results === []) {
+                    $messages[] = 'Aktuell war kein Cron-Job faellig.';
+                } else {
+                    foreach ($results as $result) {
+                        $messages[] = sprintf(
+                            '%s: %s',
+                            (string) ($result['job_key'] ?? 'Cron-Job'),
+                            (string) ($result['message'] ?? '')
+                        );
+                    }
+                }
+            } elseif ($action === 'save-job') {
+                $jobKey = (string) ($_POST['job_key'] ?? '');
+                $service->saveJob($jobKey, [
+                    'enabled' => !empty($_POST['enabled']),
+                    'cron_expression' => (string) ($_POST['cron_expression'] ?? ''),
+                    'timezone' => (string) ($_POST['timezone'] ?? ''),
+                ], $baseUrlFallback);
+                $messages[] = 'Cron-Job gespeichert: ' . $jobKey;
+            } elseif ($action === 'run-now') {
+                $jobKey = (string) ($_POST['job_key'] ?? '');
+                $result = $service->runNow($jobKey, $baseUrlFallback);
+                if (!empty($result['ok'])) {
+                    $messages[] = (string) ($result['message'] ?? 'Cron-Job ausgefuehrt.');
+                } else {
+                    $errors[] = (string) ($result['message'] ?? 'Cron-Job fehlgeschlagen.');
+                }
+            }
+        } catch (\Throwable $exception) {
+            $errors[] = $exception->getMessage();
+        }
+    }
+}
+
+$bootstrap = $service->bootstrap($baseUrlFallback);
+$settings = is_array($bootstrap['settings'] ?? null) ? $bootstrap['settings'] : [];
+$jobs = is_array($bootstrap['jobs'] ?? null) ? $bootstrap['jobs'] : [];
+$h = static fn (?string $value): string => htmlspecialchars($value ?? '', ENT_QUOTES);
+
+ob_start();
+?>
+<div id="cron-management-app" class="window-app-shell cm-shell">
+    <div class="window-app-frame cm-frame">
+        <aside class="window-app-sidebar cm-sidebar">
+            <div class="window-app-brand cm-brand">
+                <p class="window-app-kicker cm-kicker">Systemtool</p>
+                <h1>Cron Tool</h1>
+                <p class="window-app-copy cm-copy">Zentrale Verwaltung fuer modulweite Cron-Jobs, Zeitplaene und manuelle Testlaeufe.</p>
+            </div>
+
+            <section class="window-app-card cm-card">
+                <strong class="cm-side-title">Schnellstatus</strong>
+                <div class="cm-side-metric">
+                    <span>Definierte Jobs</span>
+                    <strong><?= count($jobs) ?></strong>
+                </div>
+                <div class="cm-side-metric">
+                    <span>Faellige Jobs</span>
+                    <strong><?= count(array_filter($jobs, static fn (array $job): bool => !empty($job['is_due']))) ?></strong>
+                </div>
+                <div class="cm-side-metric">
+                    <span>Standard-Zeitzone</span>
+                    <strong><?= $h((string) ($settings['default_timezone'] ?? 'Europe/Berlin')) ?></strong>
+                </div>
+            </section>
+        </aside>
+
+        <main class="window-app-main cm-main">
+            <div class="window-app-panel cm-panel">
+                <section class="window-app-hero cm-hero">
+                    <div>
+                        <p class="window-app-kicker cm-kicker">Cron Registry</p>
+                        <h2 class="window-app-title">Globale Scheduler-Verwaltung</h2>
+                        <p class="window-app-copy cm-copy">Module hinterlegen ihre Cron-Endpunkte in der Manifest-Datei. Dieses Systemtool sammelt sie automatisch und verwaltet Zeitplaene zentral.</p>
+                    </div>
+                    <div class="window-app-pill-row cm-pill-row">
+                        <span class="window-app-pill">Base URL: <?= $h((string) ($settings['base_url'] ?? '')) ?></span>
+                        <span class="window-app-pill">Token aktiv</span>
+                        <span class="window-app-pill">Admin only</span>
+                    </div>
+                </section>
+
+                <?php if ($messages !== []): ?>
+                    <section class="window-app-card cm-card">
+                        <div class="cm-message is-success">
+                            <strong>Ergebnis</strong>
+                            <ul class="cm-list">
+                                <?php foreach ($messages as $message): ?>
+                                    <li><?= $h($message) ?></li>
+                                <?php endforeach; ?>
+                            </ul>
+                        </div>
+                    </section>
+                <?php endif; ?>
+
+                <?php if ($errors !== []): ?>
+                    <section class="window-app-card cm-card">
+                        <div class="cm-message is-error">
+                            <strong>Bitte pruefen</strong>
+                            <ul class="cm-list">
+                                <?php foreach ($errors as $error): ?>
+                                    <li><?= $h($error) ?></li>
+                                <?php endforeach; ?>
+                            </ul>
+                        </div>
+                    </section>
+                <?php endif; ?>
+
+                <section class="window-app-card cm-card">
+                    <div class="cm-section-head">
+                        <div>
+                            <p class="window-app-kicker cm-kicker">Global</p>
+                            <h3 class="cm-section-title">Runner-Einstellungen</h3>
+                        </div>
+                    </div>
+
+                    <form class="cm-form cm-form--global" method="post" action="/admin/cron/">
+                        <input type="hidden" name="csrf_token" value="<?= $h($csrfToken) ?>">
+                        <input type="hidden" name="action" value="save-global">
+                        <label class="cm-field">
+                            <span>Base URL fuer Cron-Aufrufe</span>
+                            <input type="text" name="base_url" value="<?= $h((string) ($settings['base_url'] ?? '')) ?>" placeholder="https://staging.desktop.kusche.berlin">
+                        </label>
+                        <label class="cm-field">
+                            <span>Standard-Zeitzone</span>
+                            <input type="text" name="default_timezone" value="<?= $h((string) ($settings['default_timezone'] ?? 'Europe/Berlin')) ?>" list="timezone-options">
+                        </label>
+                        <div class="cm-token-box">
+                            <strong>Cron-Token</strong>
+                            <code><?= $h((string) ($settings['cron_token'] ?? '')) ?></code>
+                            <p>Der Token wird fuer interne Cron-Aufrufe per `X-Desktop-Cron-Token` genutzt.</p>
+                        </div>
+                        <div class="cm-actions">
+                            <button class="window-app-nav-button cm-primary" type="submit">Globale Einstellungen speichern</button>
+                        </div>
+                    </form>
+
+                    <form class="cm-inline-form" method="post" action="/admin/cron/">
+                        <input type="hidden" name="csrf_token" value="<?= $h($csrfToken) ?>">
+                        <input type="hidden" name="action" value="regenerate-token">
+                        <button class="window-app-nav-button cm-secondary" type="submit">Cron-Token neu erzeugen</button>
+                    </form>
+
+                    <form class="cm-inline-form" method="post" action="/admin/cron/">
+                        <input type="hidden" name="csrf_token" value="<?= $h($csrfToken) ?>">
+                        <input type="hidden" name="action" value="run-due">
+                        <button class="window-app-nav-button cm-secondary" type="submit">Faellige Jobs jetzt ausfuehren</button>
+                    </form>
+                </section>
+
+                <section class="window-app-card cm-card">
+                    <div class="cm-section-head">
+                        <div>
+                            <p class="window-app-kicker cm-kicker">Jobs</p>
+                            <h3 class="cm-section-title">Erkannte Modul-Crons</h3>
+                        </div>
+                    </div>
+
+                    <div class="cm-job-list">
+                        <?php foreach ($jobs as $job): ?>
+                            <article class="window-app-card cm-job-card">
+                                <div class="cm-job-head">
+                                    <div>
+                                        <strong><?= $h((string) ($job['label'] ?? $job['job_key'] ?? 'Cron-Job')) ?></strong>
+                                        <p><?= $h((string) ($job['description'] ?? '')) ?></p>
+                                    </div>
+                                    <div class="cm-job-meta">
+                                        <span class="window-app-pill"><?= $h((string) ($job['module_id'] ?? 'module')) ?></span>
+                                        <span class="window-app-pill"><?= $h((string) ($job['method'] ?? 'POST')) ?></span>
+                                    </div>
+                                </div>
+
+                                <div class="cm-status-grid">
+                                    <div><span>Status</span><strong><?= $h((string) (($job['state']['last_status'] ?? '') ?: ($job['enabled'] ? 'aktiv' : 'inaktiv'))) ?></strong></div>
+                                    <div><span>Naechster Lauf</span><strong><?= $h((string) (($job['next_due_at_local'] ?? '') ?: 'n/a')) ?></strong></div>
+                                    <div><span>Letzter Erfolg</span><strong><?= $h((string) (($job['state_local']['last_success_at'] ?? '') ?: 'n/a')) ?></strong></div>
+                                    <div><span>Endpoint</span><strong><?= $h((string) ($job['endpoint_path'] ?? '')) ?></strong></div>
+                                </div>
+
+                                <?php if (!empty($job['parse_error'])): ?>
+                                    <p class="cm-parse-error">Cron-Fehler: <?= $h((string) $job['parse_error']) ?></p>
+                                <?php endif; ?>
+                                <?php if (!empty($job['state']['last_message'])): ?>
+                                    <p class="cm-job-message"><?= $h((string) $job['state']['last_message']) ?></p>
+                                <?php endif; ?>
+
+                                <form class="cm-form" method="post" action="/admin/cron/">
+                                    <input type="hidden" name="csrf_token" value="<?= $h($csrfToken) ?>">
+                                    <input type="hidden" name="action" value="save-job">
+                                    <input type="hidden" name="job_key" value="<?= $h((string) ($job['job_key'] ?? '')) ?>">
+                                    <label class="cm-check">
+                                        <input type="checkbox" name="enabled" value="1" <?= !empty($job['enabled']) ? 'checked' : '' ?>>
+                                        <span>Aktiv</span>
+                                    </label>
+                                    <label class="cm-field">
+                                        <span>Cron-Ausdruck</span>
+                                        <input type="text" name="cron_expression" value="<?= $h((string) ($job['cron_expression'] ?? '0 * * * *')) ?>">
+                                    </label>
+                                    <label class="cm-field">
+                                        <span>Zeitzone</span>
+                                        <input type="text" name="timezone" value="<?= $h((string) ($job['timezone'] ?? ($settings['default_timezone'] ?? 'Europe/Berlin'))) ?>" list="timezone-options">
+                                    </label>
+                                    <div class="cm-actions">
+                                        <button class="window-app-nav-button cm-primary" type="submit">Zeitplan speichern</button>
+                                    </div>
+                                </form>
+
+                                <form class="cm-inline-form" method="post" action="/admin/cron/">
+                                    <input type="hidden" name="csrf_token" value="<?= $h($csrfToken) ?>">
+                                    <input type="hidden" name="action" value="run-now">
+                                    <input type="hidden" name="job_key" value="<?= $h((string) ($job['job_key'] ?? '')) ?>">
+                                    <button class="window-app-nav-button cm-secondary" type="submit">Jetzt ausfuehren</button>
+                                </form>
+                            </article>
+                        <?php endforeach; ?>
+                        <?php if ($jobs === []): ?>
+                            <div class="cm-empty">Aktuell wurden noch keine Cron-Jobs aus Modulen registriert.</div>
+                        <?php endif; ?>
+                    </div>
+                </section>
+            </div>
+        </main>
+    </div>
+</div>
+<datalist id="timezone-options">
+    <?php foreach (DateTimeZone::listIdentifiers() as $timezone): ?>
+        <option value="<?= $h($timezone) ?>"></option>
+    <?php endforeach; ?>
+</datalist>
+<?php
+$pageContent = (string) ob_get_clean();
+
+if ($isPartial) {
+    echo $pageContent;
+    return;
+}
+?><!DOCTYPE html>
+<html lang="de">
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>Cron Tool</title>
+    <link rel="stylesheet" href="/assets/desktop/desktop.css">
+    <link rel="stylesheet" href="/assets/apps/cron-management/app.css">
+</head>
+<body>
+    <?= $pageContent ?>
+    <script src="/assets/apps/cron-management/app.js"></script>
+    <script>
+        window.initCronManagementApp?.(document.getElementById('cron-management-app'), { standalone: true });
+    </script>
+</body>
+</html>
--- a/public/admin/users/index.php
+++ b/public/admin/users/index.php
@@ -134,6 +134,15 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
 $pendingRequests = $registration->pendingApprovals();
 $availableGroups = $registration->availableGroups();
 $existingUsers = $registration->searchExistingUsers('', 250);
+$selectedExistingUser = null;
+if ($manualUsername !== '') {
+    foreach ($existingUsers as $existingUser) {
+        if (strtolower((string) ($existingUser['username'] ?? '')) === strtolower($manualUsername)) {
+            $selectedExistingUser = $existingUser;
+            break;
+        }
+    }
+}
 $selected = $selectedId !== ''
    ? $registration->find($selectedId)
    : ($pendingRequests[0] ?? null);
@@ -350,11 +359,16 @@ ob_start();
                                <legend>Gruppen fuer Aktivierung</legend>
                                        <div class="um-checkbox-grid">
                                            <?php foreach ($availableGroups as $group): ?>
+                                                <?php
+                                                $groupDn = (string) ($group['dn'] ?? '');
+                                                $selectedGroupDns = array_values(array_map('strval', (array) ($selectedExistingUser['group_dns'] ?? [])));
+                                                $isChecked = in_array($groupDn, $selectedGroupDns, true);
+                                                ?>
                                                <label class="window-app-item um-checkbox-item">
-                                            <input type="checkbox" name="manual_group_dns[]" value="<?= $h((string) ($group['dn'] ?? '')) ?>">
+                                            <input type="checkbox" name="manual_group_dns[]" value="<?= $h($groupDn) ?>" <?= $isChecked ? 'checked' : '' ?>>
                                                    <span class="window-app-item-main">
                                                        <strong><?= $h((string) ($group['label'] ?? '')) ?></strong>
-                                                <p><?= $h((string) ($group['dn'] ?? '')) ?></p>
+                                                        <p><?= $h($groupDn) ?></p>
                                                    </span>
                                                </label>
                                            <?php endforeach; ?>
--- a/public/api/boersenchecker/index.php
+++ b/public/api/boersenchecker/index.php
@@ -2,4 +2,34 @@

 declare(strict_types=1);

+require_once dirname(__DIR__, 3) . '/src/App/bootstrap.php';
+
+use App\CronAuth;
+use ModulesCore\ModuleHttp;
+
+if (session_status() !== PHP_SESSION_ACTIVE) {
+    session_start();
+}
+
+$projectRoot = dirname(__DIR__, 3);
+$requestUri = (string) ($_SERVER['REQUEST_URI'] ?? '');
+$requestPath = (string) (parse_url($requestUri, PHP_URL_PATH) ?: '');
+$prefix = '/api/boersenchecker/index.php/';
+$relativePath = trim((string) ($_GET['path'] ?? ''), '/');
+
+if ($relativePath === '') {
+    $relativePath = str_starts_with($requestPath, $prefix)
+        ? substr($requestPath, strlen($prefix))
+        : ltrim((string) ($_SERVER['PATH_INFO'] ?? ''), '/');
+}
+
+$normalizedPath = strtolower(trim($relativePath, '/'));
+$cronPaths = [
+    'v1/cron/refresh-quotes',
+];
+
+if (!(in_array($normalizedPath, $cronPaths, true) && CronAuth::isAuthorizedRequest($projectRoot))) {
+    ModuleHttp::requireDesktopAccess($projectRoot, true);
+}
+
 require dirname(__DIR__, 3) . '/modules/boersenchecker/api/index.php';
--- a/public/api/fx-rates/index.php
+++ b/public/api/fx-rates/index.php
@@ -4,11 +4,31 @@ declare(strict_types=1);

 require_once dirname(__DIR__, 3) . '/src/App/bootstrap.php';

+use App\CronAuth;
 use ModulesCore\ModuleHttp;

 session_start();

 $projectRoot = dirname(__DIR__, 3);
-ModuleHttp::requireDesktopAccess($projectRoot, true);
+$requestUri = (string) ($_SERVER['REQUEST_URI'] ?? '');
+$requestPath = (string) (parse_url($requestUri, PHP_URL_PATH) ?: '');
+$prefix = '/api/fx-rates/index.php/';
+$relativePath = trim((string) ($_GET['path'] ?? ''), '/');
+
+if ($relativePath === '') {
+    $relativePath = str_starts_with($requestPath, $prefix)
+        ? substr($requestPath, strlen($prefix))
+        : ltrim((string) ($_SERVER['PATH_INFO'] ?? ''), '/');
+}
+
+$normalizedPath = strtolower(trim($relativePath, '/'));
+$cronPaths = [
+    'v1/refresh',
+    'v1/currency-catalog/sync',
+];
+
+if (!(in_array($normalizedPath, $cronPaths, true) && CronAuth::isAuthorizedRequest($projectRoot))) {
+    ModuleHttp::requireDesktopAccess($projectRoot, true);
+}

 require $projectRoot . '/modules/fx-rates/api/index.php';
--- a/public/assets/apps/cron-management/app.css
+++ b/public/assets/apps/cron-management/app.css
@@ -0,0 +1,186 @@
+#cron-management-app {
+    min-height: 100%;
+    color: #0f172a;
+    font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
+}
+
+#cron-management-app,
+#cron-management-app * {
+    box-sizing: border-box;
+}
+
+#cron-management-app.is-loading {
+    opacity: 0.72;
+    pointer-events: none;
+}
+
+#cron-management-app .cm-shell,
+#cron-management-app .cm-frame,
+#cron-management-app .cm-main,
+#cron-management-app .cm-panel {
+    min-height: 100%;
+}
+
+#cron-management-app .cm-brand,
+#cron-management-app .cm-copy {
+    margin: 0;
+}
+
+#cron-management-app .cm-kicker {
+    margin: 0 0 10px;
+    font-size: 12px;
+    font-weight: 700;
+    letter-spacing: 0.12em;
+    text-transform: uppercase;
+    color: #2563eb;
+}
+
+#cron-management-app .cm-card,
+#cron-management-app .cm-job-card {
+    display: grid;
+    gap: 14px;
+}
+
+#cron-management-app .cm-side-title,
+#cron-management-app .cm-section-title {
+    margin: 0;
+    font-size: 18px;
+    line-height: 1.2;
+}
+
+#cron-management-app .cm-side-metric,
+#cron-management-app .cm-field,
+#cron-management-app .cm-token-box {
+    display: grid;
+    gap: 6px;
+}
+
+#cron-management-app .cm-side-metric span,
+#cron-management-app .cm-field span,
+#cron-management-app .cm-token-box p,
+#cron-management-app .cm-job-card p,
+#cron-management-app .cm-message,
+#cron-management-app .cm-empty {
+    font-size: 14px;
+    line-height: 1.5;
+    color: #475569;
+}
+
+#cron-management-app .cm-form {
+    display: grid;
+    gap: 14px;
+}
+
+#cron-management-app .cm-form--global {
+    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
+    align-items: end;
+}
+
+#cron-management-app .cm-field input,
+#cron-management-app .cm-token-box,
+#cron-management-app .cm-status-grid > div {
+    width: 100%;
+    min-height: 46px;
+    padding: 12px 14px;
+    border-radius: 14px;
+    border: 1px solid rgba(148, 163, 184, 0.24);
+    background: rgba(255, 255, 255, 0.95);
+    color: #0f172a;
+    font: inherit;
+}
+
+#cron-management-app .cm-token-box code {
+    display: block;
+    overflow-wrap: anywhere;
+    font-size: 13px;
+}
+
+#cron-management-app .cm-actions {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 10px;
+    align-items: center;
+}
+
+#cron-management-app .cm-inline-form {
+    display: inline-flex;
+}
+
+#cron-management-app .cm-primary {
+    background: linear-gradient(135deg, #312e81, #4338ca);
+    color: #fff;
+}
+
+#cron-management-app .cm-secondary {
+    background: #eff6ff;
+    color: #1d4ed8;
+}
+
+#cron-management-app .cm-job-list {
+    display: grid;
+    gap: 16px;
+}
+
+#cron-management-app .cm-job-head,
+#cron-management-app .cm-section-head {
+    display: flex;
+    justify-content: space-between;
+    gap: 16px;
+    align-items: flex-start;
+}
+
+#cron-management-app .cm-job-meta {
+    display: flex;
+    gap: 8px;
+    flex-wrap: wrap;
+}
+
+#cron-management-app .cm-status-grid {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
+    gap: 12px;
+}
+
+#cron-management-app .cm-status-grid strong {
+    display: block;
+    margin-top: 4px;
+    color: #0f172a;
+}
+
+#cron-management-app .cm-check {
+    display: inline-flex;
+    gap: 10px;
+    align-items: center;
+    font-size: 14px;
+    color: #0f172a;
+}
+
+#cron-management-app .cm-message {
+    padding: 14px 16px;
+    border-radius: 14px;
+}
+
+#cron-management-app .cm-message.is-success {
+    background: rgba(34, 197, 94, 0.12);
+    color: #166534;
+}
+
+#cron-management-app .cm-message.is-error,
+#cron-management-app .cm-parse-error {
+    background: rgba(239, 68, 68, 0.1);
+    color: #991b1b;
+    padding: 12px 14px;
+    border-radius: 14px;
+}
+
+#cron-management-app .cm-list {
+    margin: 8px 0 0;
+    padding-left: 18px;
+}
+
+@media (max-width: 900px) {
+    #cron-management-app .cm-form--global,
+    #cron-management-app .cm-status-grid {
+        grid-template-columns: 1fr;
+    }
+}
--- a/public/assets/apps/cron-management/app.js
+++ b/public/assets/apps/cron-management/app.js
@@ -0,0 +1,103 @@
+(() => {
+    const normalizeUrl = (url) => {
+        const next = new URL(url, window.location.origin);
+        next.searchParams.set('partial', '1');
+        return next.toString();
+    };
+
+    const renderError = (host, message) => {
+        host.innerHTML = `
+            <div class="window-app-shell cm-shell">
+                <div class="window-app-frame cm-frame">
+                    <main class="window-app-main cm-main">
+                        <div class="window-app-panel cm-panel">
+                            <section class="window-app-card cm-card">
+                                <p class="cm-message is-error">${String(message || 'Cron Tool konnte nicht geladen werden.')}</p>
+                            </section>
+                        </div>
+                    </main>
+                </div>
+            </div>
+        `;
+    };
+
+    const bindInteractions = (host, loadRoute) => {
+        host.querySelectorAll('form[action]').forEach((form) => {
+            if (form.dataset.cmBound === '1') {
+                return;
+            }
+
+            const action = String(form.getAttribute('action') || '');
+            if (!action.startsWith('/admin/cron/')) {
+                return;
+            }
+
+            form.dataset.cmBound = '1';
+            form.addEventListener('submit', async (event) => {
+                event.preventDefault();
+
+                try {
+                    host.classList.add('is-loading');
+                    const response = await fetch(normalizeUrl(action), {
+                        method: 'POST',
+                        credentials: 'same-origin',
+                        body: new FormData(form),
+                    });
+
+                    const html = await response.text();
+                    if (!response.ok) {
+                        throw new Error(`HTTP ${response.status}`);
+                    }
+
+                    host.innerHTML = html;
+                    bindInteractions(host, loadRoute);
+                } catch (error) {
+                    renderError(host, error?.message || 'Cron Tool konnte nicht geladen werden.');
+                } finally {
+                    host.classList.remove('is-loading');
+                }
+            });
+        });
+    };
+
+    window.initCronManagementApp = function initCronManagementApp(host, options = {}) {
+        if (!(host instanceof Element)) {
+            return;
+        }
+
+        if (host.dataset.cmAppBound === '1') {
+            return;
+        }
+
+        host.dataset.cmAppBound = '1';
+
+        const entryRoute = String(options.entryRoute || '/admin/cron/');
+        const loadRoute = async (route) => {
+            try {
+                host.classList.add('is-loading');
+                const response = await fetch(normalizeUrl(route), {
+                    credentials: 'same-origin',
+                    headers: { Accept: 'text/html' },
+                });
+                const html = await response.text();
+                if (!response.ok) {
+                    throw new Error(`HTTP ${response.status}`);
+                }
+
+                host.innerHTML = html;
+                bindInteractions(host, loadRoute);
+            } catch (error) {
+                renderError(host, error?.message || 'Cron Tool konnte nicht geladen werden.');
+            } finally {
+                host.classList.remove('is-loading');
+            }
+        };
+
+        if (options.standalone) {
+            bindInteractions(host, loadRoute);
+            return;
+        }
+
+        loadRoute(entryRoute);
+    };
+})();
--- a/public/assets/apps/user-management/app.css
+++ b/public/assets/apps/user-management/app.css
@@ -192,6 +192,10 @@
    box-shadow: 0 20px 44px rgba(15, 23, 42, 0.12);
 }

+#user-management-app .um-user-picker-list[hidden] {
+    display: none !important;
+}
+
 #user-management-app .um-user-picker-option {
    display: grid;
    gap: 2px;
--- a/public/assets/apps/user-management/app.js
+++ b/public/assets/apps/user-management/app.js
@@ -48,6 +48,7 @@
            username: String(user?.username || ''),
            display_name: String(user?.display_name || ''),
            email: String(user?.email || ''),
+            group_dns: Array.isArray(user?.group_dns) ? user.group_dns.map((group) => String(group || '')) : [],
            search: [
                String(user?.username || ''),
                String(user?.display_name || ''),
@@ -74,6 +75,35 @@
            }
            input.dataset.umPickerBound = '1';

+            const syncGroupSelection = (username) => {
+                const normalizedUsername = String(username || '').trim().toLowerCase();
+                host.querySelectorAll('input[name="manual_group_dns[]"]').forEach((checkbox) => {
+                    if (!(checkbox instanceof HTMLInputElement)) {
+                        return;
+                    }
+
+                    checkbox.checked = false;
+                });
+
+                if (normalizedUsername === '') {
+                    return;
+                }
+
+                const user = normalizedUsers.find((entry) => entry.username.toLowerCase() === normalizedUsername);
+                if (!user) {
+                    return;
+                }
+
+                const selectedGroups = new Set(user.group_dns);
+                host.querySelectorAll('input[name="manual_group_dns[]"]').forEach((checkbox) => {
+                    if (!(checkbox instanceof HTMLInputElement)) {
+                        return;
+                    }
+
+                    checkbox.checked = selectedGroups.has(checkbox.value);
+                });
+            };
+
            const renderMatches = () => {
                const needle = input.value.trim().toLowerCase();
                const matches = normalizedUsers
@@ -109,8 +139,17 @@
                input.value = String(option.dataset.userPickerValue || '');
                list.hidden = true;
                list.innerHTML = '';
+                syncGroupSelection(input.value);
                input.dispatchEvent(new Event('change', { bubbles: true }));
            });
+
+            input.addEventListener('change', () => {
+                syncGroupSelection(input.value);
+            });
+
+            if (input.value.trim() !== '') {
+                syncGroupSelection(input.value);
+            }
        });

        if (!host.dataset.umPickerOutsideBound) {
--- a/public/assets/desktop/desktop.css
+++ b/public/assets/desktop/desktop.css
@@ -1228,6 +1228,40 @@ h1 {
    align-content: start;
 }

+.start-menu-group,
+.start-menu-group-list {
+    display: grid;
+    gap: 10px;
+}
+
+.start-menu-group {
+    gap: 12px;
+    padding-top: 6px;
+}
+
+.start-menu-group + .start-menu-group {
+    margin-top: 6px;
+    padding-top: 16px;
+    border-top: 1px solid rgba(255, 255, 255, 0.08);
+}
+
+.start-menu-group-header {
+    display: grid;
+    gap: 4px;
+    padding: 0 4px;
+}
+
+.start-menu-group-header strong {
+    font-size: 12px;
+    letter-spacing: 0.12em;
+    text-transform: uppercase;
+    color: rgba(255, 255, 255, 0.88);
+}
+
+.start-menu-group-header small {
+    color: rgba(248, 250, 252, 0.58);
+}
+
 .start-menu-selection-header {
    display: grid;
    gap: 10px;
--- a/public/assets/desktop/desktop.js
+++ b/public/assets/desktop/desktop.js
@@ -1612,6 +1612,92 @@ if (payloadNode) {
        await loadStatus();
    };

+    const renderActionPanelWidget = async (card, widget) => {
+        const statusNode = card.querySelector('[data-widget-status]');
+        const messageNode = card.querySelector('[data-widget-message]');
+        const actionButtons = Array.from(card.querySelectorAll('[data-widget-action]'));
+
+        const loadStatus = async () => {
+            if (!(statusNode instanceof HTMLElement) || !widget.status_api) {
+                return;
+            }
+
+            statusNode.textContent = 'Status wird geladen ...';
+
+            try {
+                const response = await fetch(widget.status_api, {
+                    credentials: 'same-origin',
+                    headers: { Accept: 'application/json' },
+                });
+                const payload = await response.json().catch(() => ({}));
+                if (!response.ok) {
+                    throw new Error(payload?.message || payload?.error || `HTTP ${response.status}`);
+                }
+
+                const data = payload?.data || {};
+                statusNode.textContent = String(data.status_text || data.message || 'Status geladen.');
+            } catch (error) {
+                statusNode.textContent = error instanceof Error ? error.message : 'Status konnte nicht geladen werden.';
+            }
+        };
+
+        const runAction = async (actionConfig) => {
+            if (!(messageNode instanceof HTMLElement) || !actionConfig || typeof actionConfig !== 'object') {
+                return;
+            }
+
+            const method = String(actionConfig.method || 'POST').toUpperCase();
+            const endpoint = String(actionConfig.endpoint || '');
+            if (endpoint === '') {
+                return;
+            }
+
+            messageNode.textContent = 'Aktion wird ausgefuehrt ...';
+
+            try {
+                const response = await fetch(endpoint, {
+                    method,
+                    credentials: 'same-origin',
+                    headers: {
+                        Accept: 'application/json',
+                        'Content-Type': 'application/json',
+                    },
+                    body: method === 'GET'
+                        ? null
+                        : JSON.stringify(actionConfig.payload && typeof actionConfig.payload === 'object' ? actionConfig.payload : {}),
+                });
+                const payload = await response.json().catch(() => ({}));
+                if (!response.ok) {
+                    throw new Error(payload?.message || payload?.error || `HTTP ${response.status}`);
+                }
+
+                messageNode.textContent = String(
+                    payload?.message
+                    || payload?.data?.message
+                    || payload?.data?.status_text
+                    || 'Aktion erfolgreich ausgefuehrt.'
+                );
+                await loadStatus();
+            } catch (error) {
+                messageNode.textContent = error instanceof Error ? error.message : 'Aktion fehlgeschlagen.';
+            }
+        };
+
+        actionButtons.forEach((button) => {
+            button.addEventListener('click', () => {
+                const actionId = button.getAttribute('data-widget-action') || '';
+                const actionConfig = Array.isArray(widget.actions)
+                    ? widget.actions.find((entry) => String(entry?.action_id || '') === actionId)
+                    : null;
+                if (actionConfig) {
+                    runAction(actionConfig);
+                }
+            });
+        });
+
+        await loadStatus();
+    };
+
    const renderWidgets = () => {
        if (!widgetZoneRoot) {
            return;
@@ -1643,6 +1729,21 @@ if (payloadNode) {
                            ${widget.launch_app_id ? `<button class="widget-card-action widget-card-action--secondary" type="button" data-app-id="${escapeHtml(widget.launch_app_id)}">${escapeHtml(widget.action_label || 'Oeffnen')}</button>` : ''}
                        </div>
                    `
+                    : widget.widget_type === 'action-panel'
+                        ? `
+                            <div class="widget-card-status" data-widget-status>${widget.content || 'Status wird geladen ...'}</div>
+                            <p class="widget-card-message" data-widget-message>${widget.summary || ''}</p>
+                            <div class="widget-card-actions">
+                                ${(Array.isArray(widget.actions) ? widget.actions : []).map((action) => `
+                                    <button
+                                        class="widget-card-action${action?.variant === 'secondary' ? ' widget-card-action--secondary' : ''}"
+                                        type="button"
+                                        data-widget-action="${escapeHtml(String(action?.action_id || ''))}"
+                                    >${escapeHtml(String(action?.label || 'Aktion'))}</button>
+                                `).join('')}
+                                ${widget.launch_app_id ? `<button class="widget-card-action widget-card-action--secondary" type="button" data-app-id="${escapeHtml(widget.launch_app_id)}">${escapeHtml(widget.action_label || 'Oeffnen')}</button>` : ''}
+                            </div>
+                        `
                    : `<p>${widget.content || ''}</p>${actionMarkup}`;
                card.innerHTML = `
                    <div class="widget-card-header">
@@ -1668,6 +1769,8 @@ if (payloadNode) {
                widgetZoneRoot.appendChild(card);
                if (widget.widget_type === 'fx-rates-refresh') {
                    renderFxRatesWidget(card, widget);
+                } else if (widget.widget_type === 'action-panel') {
+                    renderActionPanelWidget(card, widget);
                }
            });
    };
@@ -1706,7 +1809,38 @@ if (payloadNode) {
            return;
        }

-        payload.apps.forEach((app) => {
+        const groups = [
+            { id: 'core', label: 'Desktop', description: 'Globale Bereiche und Shell-Funktionen' },
+            { id: 'system_tool', label: 'Systemtools', description: 'Verwaltung und Setup' },
+            { id: 'module', label: 'Module', description: 'Installierte Fachanwendungen' },
+        ];
+
+        groups.forEach((group) => {
+            const apps = payload.apps.filter((app) => {
+                if (app.show_in_start_menu === false) {
+                    return false;
+                }
+
+                return String(app.app_scope || 'module') === group.id;
+            });
+
+            if (apps.length === 0) {
+                return;
+            }
+
+            const section = document.createElement('section');
+            section.className = 'start-menu-group';
+            section.innerHTML = `
+                <header class="start-menu-group-header">
+                    <strong>${group.label}</strong>
+                    <small>${group.description}</small>
+                </header>
+            `;
+
+            const list = document.createElement('div');
+            list.className = 'start-menu-group-list';
+
+            apps.forEach((app) => {
                const button = document.createElement('button');
                button.type = 'button';
                button.className = 'start-menu-entry start-menu-entry--app';
@@ -1722,7 +1856,11 @@ if (payloadNode) {
                    openApp(app);
                    closeStartMenu();
                });
-            startMenuApps.appendChild(button);
+                list.appendChild(button);
+            });
+
+            section.appendChild(list);
+            startMenuApps.appendChild(section);
        });
    };

--- a/src/App/App.php
+++ b/src/App/App.php
@@ -29,7 +29,7 @@ final class App
        $auth = new KeycloakAuth($keycloakConfig);
        $moduleRegistry = new ModuleRegistry($this->projectRoot . '/modules');
        $registry = new AppRegistry($this->projectRoot . '/config/apps.php', $moduleRegistry->desktopApps());
-        $widgetRegistry = new WidgetRegistry($this->projectRoot . '/config/widgets.php');
+        $widgetRegistry = new WidgetRegistry($this->projectRoot . '/config/widgets.php', $moduleRegistry->widgets());
        $skins = SkinResolver::all();
        $isAuthenticated = isset($_SESSION['desktop_auth']) && is_array($_SESSION['desktop_auth']);
        $authUser = $isAuthenticated && is_array($_SESSION['desktop_auth']['user'] ?? null)
@@ -55,6 +55,11 @@ final class App
        );
        $apps = AppIconResolver::decorate($enabledApps, $activeSkin);
        $windows = (new WindowManager($registry))->defaultWindows();
+        $enabledAppIds = array_values(array_filter(array_map(
+            static fn (array $app): string => (string) ($app['app_id'] ?? ''),
+            $enabledApps
+        )));
+        $availableWidgets = $widgetRegistry->availableForApps($enabledAppIds);
        $activeWidgetIds = array_values(array_map('strval', (array) ($userSettings['widgets']['active_ids'] ?? DesktopState::defaultWidgetIds())));
        $trayItems = DesktopState::trayItems();
        foreach ($enabledApps as $app) {
@@ -103,8 +108,8 @@ final class App
            'apps' => $apps,
            'windows' => $windows,
            'widgets' => [
-                'active' => $widgetRegistry->active($activeWidgetIds),
-                'registry' => $widgetRegistry->all(),
+                'active' => $widgetRegistry->active($activeWidgetIds, $enabledAppIds),
+                'registry' => $availableWidgets,
                'active_ids' => $activeWidgetIds,
            ],
            'tray' => $trayItems,
--- a/src/App/CronAuth.php
+++ b/src/App/CronAuth.php
@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App;
+
+final class CronAuth
+{
+    public static function isAuthorizedRequest(string $projectRoot): bool
+    {
+        $configured = self::configuredToken($projectRoot);
+        $provided = self::providedToken();
+
+        return $configured !== null
+            && $provided !== null
+            && hash_equals($configured, $provided);
+    }
+
+    public static function configuredToken(string $projectRoot): ?string
+    {
+        $settings = self::settingsStore($projectRoot)->read();
+        $token = trim((string) ($settings['cron_token'] ?? ''));
+
+        return $token !== '' ? $token : null;
+    }
+
+    public static function providedToken(): ?string
+    {
+        $headers = function_exists('getallheaders') ? (array) getallheaders() : [];
+        $candidates = [
+            $headers['X-Desktop-Cron-Token'] ?? null,
+            $headers['x-desktop-cron-token'] ?? null,
+            $_SERVER['HTTP_X_DESKTOP_CRON_TOKEN'] ?? null,
+            $_GET['cron_token'] ?? null,
+            $_POST['cron_token'] ?? null,
+        ];
+
+        foreach ($candidates as $candidate) {
+            $token = trim((string) $candidate);
+            if ($token !== '') {
+                return $token;
+            }
+        }
+
+        return null;
+    }
+
+    private static function settingsStore(string $projectRoot): JsonStore
+    {
+        return new JsonStore(rtrim($projectRoot, '/') . '/data/system/cron/settings.json');
+    }
+}
--- a/src/App/CronExpression.php
+++ b/src/App/CronExpression.php
@@ -0,0 +1,217 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App;
+
+use DateInterval;
+use DateTimeImmutable;
+use DateTimeZone;
+
+final class CronExpression
+{
+    /** @var array<int, true> */
+    private array $minutes;
+    /** @var array<int, true> */
+    private array $hours;
+    /** @var array<int, true> */
+    private array $daysOfMonth;
+    /** @var array<int, true> */
+    private array $months;
+    /** @var array<int, true> */
+    private array $daysOfWeek;
+
+    private function __construct(
+        private string $expression,
+        array $minutes,
+        array $hours,
+        array $daysOfMonth,
+        array $months,
+        array $daysOfWeek,
+        private bool $daysOfMonthWildcard,
+        private bool $daysOfWeekWildcard
+    ) {
+        $this->minutes = $minutes;
+        $this->hours = $hours;
+        $this->daysOfMonth = $daysOfMonth;
+        $this->months = $months;
+        $this->daysOfWeek = $daysOfWeek;
+    }
+
+    public static function parse(string $expression): self
+    {
+        $normalized = preg_replace('/\s+/', ' ', trim($expression)) ?? '';
+        if ($normalized === '') {
+            throw new \InvalidArgumentException('Cron-Ausdruck fehlt.');
+        }
+
+        $parts = explode(' ', $normalized);
+        if (count($parts) !== 5) {
+            throw new \InvalidArgumentException('Cron-Ausdruck muss aus 5 Feldern bestehen.');
+        }
+
+        return new self(
+            $normalized,
+            self::parseField($parts[0], 0, 59),
+            self::parseField($parts[1], 0, 23),
+            self::parseField($parts[2], 1, 31),
+            self::parseField($parts[3], 1, 12, [
+                'JAN' => 1, 'FEB' => 2, 'MAR' => 3, 'APR' => 4,
+                'MAY' => 5, 'JUN' => 6, 'JUL' => 7, 'AUG' => 8,
+                'SEP' => 9, 'OCT' => 10, 'NOV' => 11, 'DEC' => 12,
+            ]),
+            self::parseField($parts[4], 0, 6, [
+                'SUN' => 0, 'MON' => 1, 'TUE' => 2, 'WED' => 3,
+                'THU' => 4, 'FRI' => 5, 'SAT' => 6,
+                '7' => 0,
+            ]),
+            trim($parts[2]) === '*',
+            trim($parts[4]) === '*'
+        );
+    }
+
+    public function matches(DateTimeImmutable $utcDateTime, DateTimeZone $timezone): bool
+    {
+        $local = $utcDateTime->setTimezone($timezone);
+        $minute = (int) $local->format('i');
+        $hour = (int) $local->format('G');
+        $dayOfMonth = (int) $local->format('j');
+        $month = (int) $local->format('n');
+        $dayOfWeek = (int) $local->format('w');
+
+        if (!isset($this->minutes[$minute]) || !isset($this->hours[$hour]) || !isset($this->months[$month])) {
+            return false;
+        }
+
+        $dayOfMonthMatch = isset($this->daysOfMonth[$dayOfMonth]);
+        $dayOfWeekMatch = isset($this->daysOfWeek[$dayOfWeek]);
+        if ($this->daysOfMonthWildcard && $this->daysOfWeekWildcard) {
+            $dayMatches = true;
+        } elseif ($this->daysOfMonthWildcard) {
+            $dayMatches = $dayOfWeekMatch;
+        } elseif ($this->daysOfWeekWildcard) {
+            $dayMatches = $dayOfMonthMatch;
+        } else {
+            $dayMatches = $dayOfMonthMatch || $dayOfWeekMatch;
+        }
+
+        return $dayMatches;
+    }
+
+    public function previousRun(DateTimeImmutable $utcDateTime, DateTimeZone $timezone, int $lookbackMinutes = 527040): ?DateTimeImmutable
+    {
+        $cursor = $this->floorToMinute($utcDateTime);
+        for ($i = 0; $i <= $lookbackMinutes; $i++) {
+            if ($this->matches($cursor, $timezone)) {
+                return $cursor;
+            }
+
+            $cursor = $cursor->sub(new DateInterval('PT1M'));
+        }
+
+        return null;
+    }
+
+    public function nextRun(DateTimeImmutable $utcDateTime, DateTimeZone $timezone, int $lookaheadMinutes = 527040): ?DateTimeImmutable
+    {
+        $cursor = $this->floorToMinute($utcDateTime)->add(new DateInterval('PT1M'));
+        for ($i = 0; $i <= $lookaheadMinutes; $i++) {
+            if ($this->matches($cursor, $timezone)) {
+                return $cursor;
+            }
+
+            $cursor = $cursor->add(new DateInterval('PT1M'));
+        }
+
+        return null;
+    }
+
+    /**
+     * @return array<int, true>
+     */
+    private static function parseField(string $field, int $min, int $max, array $aliases = []): array
+    {
+        $field = strtoupper(trim($field));
+        if ($field === '*') {
+            $all = [];
+            for ($value = $min; $value <= $max; $value++) {
+                $all[$value] = true;
+            }
+
+            return $all;
+        }
+
+        $values = [];
+        foreach (explode(',', $field) as $segment) {
+            $segment = strtoupper(trim($segment));
+            if ($segment === '') {
+                continue;
+            }
+
+            $step = 1;
+            if (str_contains($segment, '/')) {
+                [$segment, $stepPart] = explode('/', $segment, 2);
+                if (!is_numeric($stepPart) || (int) $stepPart <= 0) {
+                    throw new \InvalidArgumentException('Ungueltiger Cron-Step in Feld "' . $field . '".');
+                }
+
+                $step = (int) $stepPart;
+            }
+
+            if ($segment === '*') {
+                $start = $min;
+                $end = $max;
+            } elseif (str_contains($segment, '-')) {
+                [$startPart, $endPart] = explode('-', $segment, 2);
+                $start = self::normalizePart($startPart, $aliases);
+                $end = self::normalizePart($endPart, $aliases);
+            } else {
+                $start = self::normalizePart($segment, $aliases);
+                $end = $start;
+            }
+
+            if ($start < $min || $start > $max || $end < $min || $end > $max || $end < $start) {
+                throw new \InvalidArgumentException('Cron-Feld "' . $field . '" liegt ausserhalb des erlaubten Bereichs.');
+            }
+
+            for ($value = $start; $value <= $end; $value += $step) {
+                $values[$value] = true;
+            }
+        }
+
+        if ($values === []) {
+            throw new \InvalidArgumentException('Cron-Feld "' . $field . '" ist leer.');
+        }
+
+        ksort($values);
+
+        return $values;
+    }
+
+    private static function normalizePart(string $part, array $aliases): int
+    {
+        $part = strtoupper(trim($part));
+        if ($part === '') {
+            throw new \InvalidArgumentException('Leerer Cron-Wert.');
+        }
+
+        if (array_key_exists($part, $aliases)) {
+            return (int) $aliases[$part];
+        }
+
+        if (!is_numeric($part)) {
+            throw new \InvalidArgumentException('Ungueltiger Cron-Wert "' . $part . '".');
+        }
+
+        return (int) $part;
+    }
+
+    private function floorToMinute(DateTimeImmutable $utcDateTime): DateTimeImmutable
+    {
+        return $utcDateTime->setTime(
+            (int) $utcDateTime->format('H'),
+            (int) $utcDateTime->format('i'),
+            0
+        );
+    }
+}
--- a/src/App/CronManagementService.php
+++ b/src/App/CronManagementService.php
@@ -0,0 +1,515 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App;
+
+use DateTimeImmutable;
+use DateTimeZone;
+use ModulesCore\ModuleRegistry;
+
+final class CronManagementService
+{
+    public function __construct(
+        private readonly string $projectRoot,
+        private readonly ModuleRegistry $moduleRegistry,
+    ) {
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function bootstrap(?string $baseUrlFallback = null): array
+    {
+        $settings = $this->loadSettings($baseUrlFallback);
+        $definitions = $this->definitions();
+        $statuses = $this->statuses($settings, $definitions);
+
+        return [
+            'settings' => $settings,
+            'jobs' => $statuses,
+        ];
+    }
+
+    /**
+     * @param array<string, mixed> $input
+     * @return array<string, mixed>
+     */
+    public function saveGlobal(array $input, ?string $baseUrlFallback = null): array
+    {
+        $current = $this->loadSettings($baseUrlFallback);
+        $current['base_url'] = $this->sanitizeBaseUrl((string) ($input['base_url'] ?? $current['base_url']));
+        $current['default_timezone'] = $this->sanitizeTimezone((string) ($input['default_timezone'] ?? $current['default_timezone']));
+        $current['updated_at'] = gmdate(DATE_ATOM);
+        $this->settingsStore()->write($current);
+
+        return $current;
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function regenerateToken(?string $baseUrlFallback = null): array
+    {
+        $current = $this->loadSettings($baseUrlFallback);
+        $current['cron_token'] = bin2hex(random_bytes(24));
+        $current['updated_at'] = gmdate(DATE_ATOM);
+        $this->settingsStore()->write($current);
+
+        return $current;
+    }
+
+    /**
+     * @param array<string, mixed> $input
+     * @return array<string, mixed>
+     */
+    public function saveJob(string $jobKey, array $input, ?string $baseUrlFallback = null): array
+    {
+        $settings = $this->loadSettings($baseUrlFallback);
+        $definitions = $this->definitions();
+        if (!isset($definitions[$jobKey])) {
+            throw new \RuntimeException('Cron-Job nicht gefunden.');
+        }
+
+        $definition = $definitions[$jobKey];
+        $settings['jobs'][$jobKey] = [
+            'enabled' => !empty($input['enabled']),
+            'cron_expression' => trim((string) ($input['cron_expression'] ?? $definition['default_cron'] ?? '0 * * * *')),
+            'timezone' => $this->sanitizeTimezone((string) ($input['timezone'] ?? $definition['default_timezone'] ?? $settings['default_timezone'])),
+        ];
+        $settings['updated_at'] = gmdate(DATE_ATOM);
+        $this->settingsStore()->write($settings);
+
+        return $settings;
+    }
+
+    /**
+     * @return array<int, array<string, mixed>>
+     */
+    public function runDue(?string $baseUrlFallback = null): array
+    {
+        $settings = $this->loadSettings($baseUrlFallback);
+        $definitions = $this->definitions();
+        $statuses = $this->statuses($settings, $definitions);
+        $results = [];
+
+        foreach ($statuses as $status) {
+            if (empty($status['enabled']) || empty($status['is_due']) || !empty($status['parse_error'])) {
+                continue;
+            }
+
+            $results[] = $this->runJob(
+                $status['job_key'],
+                $settings,
+                $definitions,
+                $status['previous_due_at'] ?? null,
+                'cron_runner'
+            );
+        }
+
+        return $results;
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function runNow(string $jobKey, ?string $baseUrlFallback = null): array
+    {
+        $settings = $this->loadSettings($baseUrlFallback);
+        $definitions = $this->definitions();
+
+        return $this->runJob($jobKey, $settings, $definitions, null, 'manual_test');
+    }
+
+    /**
+     * @return array<string, array<string, mixed>>
+     */
+    private function definitions(): array
+    {
+        $definitions = [];
+        foreach ($this->moduleRegistry->cronJobs() as $job) {
+            $jobKey = (string) ($job['job_key'] ?? '');
+            if ($jobKey === '') {
+                continue;
+            }
+
+            $definitions[$jobKey] = $job;
+        }
+
+        ksort($definitions);
+
+        return $definitions;
+    }
+
+    /**
+     * @param array<string, mixed> $settings
+     * @param array<string, array<string, mixed>> $definitions
+     * @return array<int, array<string, mixed>>
+     */
+    private function statuses(array $settings, array $definitions): array
+    {
+        $states = $this->stateStore()->read();
+        $nowUtc = new DateTimeImmutable('now', new DateTimeZone('UTC'));
+        $result = [];
+
+        foreach ($definitions as $jobKey => $definition) {
+            $config = $this->jobConfig($jobKey, $definition, $settings);
+            $state = is_array($states[$jobKey] ?? null) ? $states[$jobKey] : [];
+            $timezone = $this->safeTimezone((string) ($config['timezone'] ?? $settings['default_timezone']));
+            $expression = trim((string) ($config['cron_expression'] ?? ''));
+            $parseError = null;
+            $previousDueUtc = null;
+            $nextDueUtc = null;
+            $isDue = false;
+            $isLocked = $this->isLockActive($state, time());
+
+            try {
+                $cron = CronExpression::parse($expression);
+                if (!empty($config['enabled'])) {
+                    $previousDueUtc = $cron->previousRun($nowUtc, $timezone);
+                    $lastScheduledFor = $this->parseUtc((string) ($state['last_scheduled_for'] ?? ''));
+                    $isDue = !$isLocked
+                        && $previousDueUtc instanceof DateTimeImmutable
+                        && ($lastScheduledFor === null || $previousDueUtc > $lastScheduledFor);
+                    $nextDueUtc = $isDue ? $previousDueUtc : $cron->nextRun($nowUtc, $timezone);
+                }
+            } catch (\Throwable $exception) {
+                $parseError = $exception->getMessage();
+            }
+
+            $result[] = array_merge($definition, [
+                'job_key' => $jobKey,
+                'config' => $config,
+                'state' => $state,
+                'state_local' => [
+                    'last_started_at' => $this->formatLocal((string) ($state['last_started_at'] ?? ''), $timezone),
+                    'last_finished_at' => $this->formatLocal((string) ($state['last_finished_at'] ?? ''), $timezone),
+                    'last_success_at' => $this->formatLocal((string) ($state['last_success_at'] ?? ''), $timezone),
+                    'last_scheduled_for' => $this->formatLocal((string) ($state['last_scheduled_for'] ?? ''), $timezone),
+                ],
+                'enabled' => !empty($config['enabled']),
+                'cron_expression' => $expression,
+                'timezone' => $timezone->getName(),
+                'parse_error' => $parseError,
+                'is_due' => $isDue,
+                'is_locked' => $isLocked,
+                'previous_due_at' => $previousDueUtc?->format('Y-m-d H:i:s'),
+                'next_due_at' => $nextDueUtc?->format('Y-m-d H:i:s'),
+                'previous_due_at_local' => $previousDueUtc?->setTimezone($timezone)->format('d.m.Y H:i'),
+                'next_due_at_local' => $nextDueUtc?->setTimezone($timezone)->format('d.m.Y H:i'),
+            ]);
+        }
+
+        return $result;
+    }
+
+    /**
+     * @param array<string, mixed> $settings
+     * @param array<string, array<string, mixed>> $definitions
+     * @return array<string, mixed>
+     */
+    private function runJob(string $jobKey, array $settings, array $definitions, ?string $scheduledForUtc, string $trigger): array
+    {
+        if (!isset($definitions[$jobKey])) {
+            throw new \RuntimeException('Cron-Job nicht gefunden.');
+        }
+
+        $definition = $definitions[$jobKey];
+        $config = $this->jobConfig($jobKey, $definition, $settings);
+        $lockMinutes = max(1, (int) ($definition['lock_minutes'] ?? 10));
+        $state = $this->stateStore()->read();
+        $currentState = is_array($state[$jobKey] ?? null) ? $state[$jobKey] : [];
+        if ($this->isLockActive($currentState, time())) {
+            return [
+                'job_key' => $jobKey,
+                'ok' => false,
+                'message' => 'Cron-Job ist aktuell gesperrt.',
+            ];
+        }
+
+        $startedAt = gmdate('Y-m-d H:i:s');
+        $this->persistState($jobKey, [
+            'last_started_at' => $startedAt,
+            'last_status' => 'running',
+            'last_message' => $trigger === 'manual_test' ? 'Manueller Testlauf gestartet.' : 'Cron-Lauf gestartet.',
+            'lock_until' => gmdate('Y-m-d H:i:s', time() + ($lockMinutes * 60)),
+        ]);
+
+        try {
+            $url = $this->absoluteUrl((string) $settings['base_url'], (string) ($definition['endpoint_path'] ?? ''));
+            $payload = is_array($definition['payload'] ?? null) ? $definition['payload'] : [];
+            $payload['trigger_source'] ??= $trigger === 'manual_test' ? 'manual' : 'cron';
+            $response = $this->httpRequest(
+                strtoupper((string) ($definition['method'] ?? 'POST')),
+                $url,
+                $payload,
+                (string) ($settings['cron_token'] ?? '')
+            );
+
+            $ok = $response['ok'];
+            $message = $response['message'] !== '' ? $response['message'] : ($ok ? 'Cron-Lauf erfolgreich.' : 'Cron-Lauf fehlgeschlagen.');
+            $finishedAt = gmdate('Y-m-d H:i:s');
+
+            $persist = [
+                'last_finished_at' => $finishedAt,
+                'last_status' => $ok ? 'success' : 'error',
+                'last_message' => $message,
+                'lock_until' => null,
+            ];
+            if ($scheduledForUtc !== null) {
+                $persist['last_scheduled_for'] = $scheduledForUtc;
+            }
+            if ($ok) {
+                $persist['last_success_at'] = $finishedAt;
+            }
+            $this->persistState($jobKey, $persist);
+
+            return [
+                'job_key' => $jobKey,
+                'ok' => $ok,
+                'message' => $message,
+                'url' => $url,
+            ];
+        } catch (\Throwable $exception) {
+            $finishedAt = gmdate('Y-m-d H:i:s');
+            $persist = [
+                'last_finished_at' => $finishedAt,
+                'last_status' => 'error',
+                'last_message' => $exception->getMessage(),
+                'lock_until' => null,
+            ];
+            if ($scheduledForUtc !== null) {
+                $persist['last_scheduled_for'] = $scheduledForUtc;
+            }
+            $this->persistState($jobKey, $persist);
+
+            return [
+                'job_key' => $jobKey,
+                'ok' => false,
+                'message' => $exception->getMessage(),
+            ];
+        }
+    }
+
+    /**
+     * @param array<string, mixed> $settings
+     * @return array<string, mixed>
+     */
+    private function jobConfig(string $jobKey, array $definition, array $settings): array
+    {
+        $saved = is_array($settings['jobs'][$jobKey] ?? null) ? $settings['jobs'][$jobKey] : [];
+
+        return [
+            'enabled' => array_key_exists('enabled', $saved) ? !empty($saved['enabled']) : (bool) ($definition['default_enabled'] ?? false),
+            'cron_expression' => trim((string) ($saved['cron_expression'] ?? $definition['default_cron'] ?? '0 * * * *')) ?: '0 * * * *',
+            'timezone' => $this->sanitizeTimezone((string) ($saved['timezone'] ?? $definition['default_timezone'] ?? $settings['default_timezone'])),
+        ];
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    private function loadSettings(?string $baseUrlFallback): array
+    {
+        $stored = $this->settingsStore()->read();
+        $baseUrl = $this->sanitizeBaseUrl((string) ($stored['base_url'] ?? $this->detectBaseUrl($baseUrlFallback)));
+        $defaultTimezone = $this->sanitizeTimezone((string) ($stored['default_timezone'] ?? (function_exists('nexus_cron_timezone_name') ? nexus_cron_timezone_name() : 'Europe/Berlin')));
+        $token = trim((string) ($stored['cron_token'] ?? ''));
+
+        return [
+            'base_url' => $baseUrl,
+            'default_timezone' => $defaultTimezone,
+            'cron_token' => $token !== '' ? $token : bin2hex(random_bytes(24)),
+            'jobs' => is_array($stored['jobs'] ?? null) ? $stored['jobs'] : [],
+            'updated_at' => (string) ($stored['updated_at'] ?? ''),
+        ];
+    }
+
+    private function detectBaseUrl(?string $fallback): string
+    {
+        $fallback = trim((string) $fallback);
+        if ($fallback !== '') {
+            return $fallback;
+        }
+
+        $scheme = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https' : 'http';
+        $host = trim((string) ($_SERVER['HTTP_HOST'] ?? ''));
+
+        return $host !== '' ? $scheme . '://' . $host : '';
+    }
+
+    private function sanitizeBaseUrl(string $value): string
+    {
+        $value = trim($value);
+        return rtrim($value, '/');
+    }
+
+    private function sanitizeTimezone(string $value): string
+    {
+        $value = trim($value);
+        if ($value !== '' && in_array($value, DateTimeZone::listIdentifiers(), true)) {
+            return $value;
+        }
+
+        if (function_exists('nexus_cron_timezone_name')) {
+            return nexus_cron_timezone_name();
+        }
+
+        return 'Europe/Berlin';
+    }
+
+    private function safeTimezone(string $value): DateTimeZone
+    {
+        try {
+            return new DateTimeZone($this->sanitizeTimezone($value));
+        } catch (\Throwable) {
+            return new DateTimeZone('Europe/Berlin');
+        }
+    }
+
+    private function formatLocal(string $utcDateTime, DateTimeZone $timezone): ?string
+    {
+        $parsed = $this->parseUtc($utcDateTime);
+        return $parsed?->setTimezone($timezone)->format('d.m.Y H:i');
+    }
+
+    private function absoluteUrl(string $baseUrl, string $endpointPath): string
+    {
+        $baseUrl = rtrim(trim($baseUrl), '/');
+        $endpointPath = '/' . ltrim(trim($endpointPath), '/');
+        if ($baseUrl === '') {
+            throw new \RuntimeException('Keine Base-URL fuer Cron-Aufrufe konfiguriert.');
+        }
+
+        return $baseUrl . $endpointPath;
+    }
+
+    /**
+     * @param array<string, mixed> $payload
+     * @return array{ok: bool, message: string}
+     */
+    private function httpRequest(string $method, string $url, array $payload, string $token): array
+    {
+        $headers = [
+            'Accept: application/json',
+            'Content-Type: application/json',
+        ];
+        if ($token !== '') {
+            $headers[] = 'X-Desktop-Cron-Token: ' . $token;
+        }
+
+        $body = $method === 'GET' ? null : json_encode($payload, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+        if ($method === 'GET' && $payload !== []) {
+            $url .= (str_contains($url, '?') ? '&' : '?') . http_build_query($payload, '', '&', PHP_QUERY_RFC3986);
+        }
+
+        if (function_exists('curl_init')) {
+            $ch = curl_init($url);
+            curl_setopt_array($ch, [
+                CURLOPT_RETURNTRANSFER => true,
+                CURLOPT_TIMEOUT => 120,
+                CURLOPT_CONNECTTIMEOUT => 15,
+                CURLOPT_CUSTOMREQUEST => $method,
+                CURLOPT_HTTPHEADER => $headers,
+                CURLOPT_POSTFIELDS => $body,
+            ]);
+            $raw = curl_exec($ch);
+            $status = (int) curl_getinfo($ch, CURLINFO_HTTP_CODE);
+            $error = curl_error($ch);
+            curl_close($ch);
+
+            if (!is_string($raw)) {
+                throw new \RuntimeException($error !== '' ? $error : 'Cron-HTTP-Aufruf fehlgeschlagen.');
+            }
+
+            return $this->decodeHttpResponse($status, $raw);
+        }
+
+        $context = stream_context_create([
+            'http' => [
+                'method' => $method,
+                'header' => implode("\r\n", $headers),
+                'content' => $body ?: '',
+                'ignore_errors' => true,
+                'timeout' => 120,
+            ],
+        ]);
+        $raw = @file_get_contents($url, false, $context);
+        $statusLine = is_array($http_response_header ?? null) ? (string) ($http_response_header[0] ?? '') : '';
+        preg_match('/\s(\d{3})\s/', $statusLine, $matches);
+        $status = isset($matches[1]) ? (int) $matches[1] : 0;
+        if (!is_string($raw)) {
+            throw new \RuntimeException('Cron-HTTP-Aufruf fehlgeschlagen.');
+        }
+
+        return $this->decodeHttpResponse($status, $raw);
+    }
+
+    /**
+     * @return array{ok: bool, message: string}
+     */
+    private function decodeHttpResponse(int $status, string $raw): array
+    {
+        $decoded = json_decode($raw, true);
+        $message = '';
+        if (is_array($decoded)) {
+            $message = trim((string) ($decoded['data']['message'] ?? $decoded['message'] ?? $decoded['error'] ?? ''));
+        }
+
+        return [
+            'ok' => $status >= 200 && $status < 300,
+            'message' => $message,
+        ];
+    }
+
+    /**
+     * @param array<string, mixed> $values
+     */
+    private function persistState(string $jobKey, array $values): void
+    {
+        $states = $this->stateStore()->read();
+        $current = is_array($states[$jobKey] ?? null) ? $states[$jobKey] : [];
+        $states[$jobKey] = array_merge($current, $values, [
+            'updated_at' => gmdate('Y-m-d H:i:s'),
+        ]);
+        $this->stateStore()->write($states);
+    }
+
+    /**
+     * @param array<string, mixed> $state
+     */
+    private function isLockActive(array $state, int $nowTs): bool
+    {
+        $lockUntil = trim((string) ($state['lock_until'] ?? ''));
+        if ($lockUntil === '') {
+            return false;
+        }
+
+        $lockTs = strtotime($lockUntil);
+        return $lockTs !== false && $lockTs > $nowTs;
+    }
+
+    private function parseUtc(string $value): ?DateTimeImmutable
+    {
+        $value = trim($value);
+        if ($value === '') {
+            return null;
+        }
+
+        try {
+            return new DateTimeImmutable($value, new DateTimeZone('UTC'));
+        } catch (\Throwable) {
+            return null;
+        }
+    }
+
+    private function settingsStore(): JsonStore
+    {
+        return new JsonStore($this->projectRoot . '/data/system/cron/settings.json');
+    }
+
+    private function stateStore(): JsonStore
+    {
+        return new JsonStore($this->projectRoot . '/data/system/cron/state.json');
+    }
+}
--- a/src/App/LdapProvisioner.php
+++ b/src/App/LdapProvisioner.php
@@ -98,6 +98,7 @@ final class LdapProvisioner
                return [];
            }

+            $membershipMap = $this->loadGroupMembershipMap($link);
            $results = [];
            for ($index = 0; $index < (int) $entries['count']; $index++) {
                $entry = $entries[$index] ?? null;
@@ -120,6 +121,7 @@ final class LdapProvisioner
                    'display_name' => $displayName,
                    'email' => $this->firstAttributeValue($entry, 'mail'),
                    'dn' => (string) ($entry['dn'] ?? ''),
+                    'group_dns' => $this->resolveUserGroupDns($entry, $username, $membershipMap),
                ];
            }

@@ -137,6 +139,101 @@ final class LdapProvisioner
        }
    }

+    /**
+     * @param resource|\LDAP\Connection $link
+     * @return array<string, array<int, string>>
+     */
+    private function loadGroupMembershipMap($link): array
+    {
+        $groups = array_values(array_filter(array_map(
+            static fn (array $group): string => trim((string) ($group['dn'] ?? '')),
+            (array) ($this->config['ldap']['available_groups'] ?? [])
+        )));
+        if ($groups === []) {
+            return [];
+        }
+
+        $attribute = (string) ($this->config['ldap']['group_member_attribute'] ?? 'memberUid');
+        $map = [];
+
+        foreach ($groups as $groupDn) {
+            $read = @ldap_read($link, $groupDn, '(objectClass=*)', [$attribute]);
+            if ($read === false) {
+                continue;
+            }
+
+            $entries = ldap_get_entries($link, $read);
+            if (!is_array($entries) || (int) ($entries['count'] ?? 0) < 1 || !is_array($entries[0] ?? null)) {
+                continue;
+            }
+
+            $values = $entries[0][strtolower($attribute)] ?? $entries[0][$attribute] ?? null;
+            if (!is_array($values)) {
+                continue;
+            }
+
+            foreach ($values as $key => $value) {
+                if (!is_int($key)) {
+                    continue;
+                }
+
+                $normalized = trim((string) $value);
+                if ($normalized === '') {
+                    continue;
+                }
+
+                $lookupKeys = [$normalized];
+                if (str_contains($normalized, ',')) {
+                    $uidPrefix = strtok($normalized, ',');
+                    if (is_string($uidPrefix) && str_starts_with(strtolower($uidPrefix), 'uid=')) {
+                        $lookupKeys[] = substr($uidPrefix, 4);
+                    }
+                }
+
+                foreach ($lookupKeys as $lookupKey) {
+                    $lookupKey = strtolower(trim((string) $lookupKey));
+                    if ($lookupKey === '') {
+                        continue;
+                    }
+
+                    $map[$lookupKey] ??= [];
+                    $map[$lookupKey][] = $groupDn;
+                }
+            }
+        }
+
+        foreach ($map as $key => $groupDns) {
+            $map[$key] = array_values(array_unique(array_filter(array_map('strval', $groupDns))));
+        }
+
+        return $map;
+    }
+
+    /**
+     * @param array<string, mixed> $entry
+     * @param array<string, array<int, string>> $membershipMap
+     * @return array<int, string>
+     */
+    private function resolveUserGroupDns(array $entry, string $username, array $membershipMap): array
+    {
+        $mode = (string) ($this->config['ldap']['group_assignment_mode'] ?? 'group_memberuid');
+        if ($mode === 'user_memberof') {
+            $memberOf = $entry['memberof'] ?? $entry['memberOf'] ?? [];
+            if (is_string($memberOf)) {
+                return $memberOf !== '' ? [$memberOf] : [];
+            }
+
+            if (is_array($memberOf)) {
+                return array_values(array_unique(array_filter(array_map('strval', $memberOf))));
+            }
+        }
+
+        return array_values(array_unique(array_filter(array_map(
+            'strval',
+            $membershipMap[strtolower(trim($username))] ?? []
+        ))));
+    }
+
    /**
     * @param array<int, string> $attributes
     * @return array<string, mixed>|null
--- a/src/App/UserSelfManagementService.php
+++ b/src/App/UserSelfManagementService.php
@@ -105,7 +105,23 @@ final class UserSelfManagementService
    {
        $settings = $this->load($authUser, $visibleApps, $widgets, $availableSkins);
        $enabledAppIds = array_values(array_map('strval', (array) ($settings['apps']['enabled_ids'] ?? [])));
+        $enabledAppLookup = array_fill_keys($enabledAppIds, true);
        $activeWidgetIds = array_values(array_map('strval', (array) ($settings['widgets']['active_ids'] ?? [])));
+        $installableApps = array_values(array_filter(
+            $visibleApps,
+            static fn (array $app): bool => !array_key_exists('installable', $app) || (bool) $app['installable']
+        ));
+        $availableWidgets = array_values(array_filter(
+            $widgets,
+            static function (array $widget) use ($enabledAppLookup): bool {
+                $sourceAppId = trim((string) ($widget['source_app_id'] ?? ''));
+                if ($sourceAppId === '') {
+                    return true;
+                }
+
+                return isset($enabledAppLookup[$sourceAppId]);
+            }
+        ));

        return [
            'preferences' => $settings,
@@ -123,10 +139,11 @@ final class UserSelfManagementService
                        'title' => (string) ($app['title'] ?? ''),
                        'summary' => (string) ($app['summary'] ?? ''),
                        'module_name' => (string) ($app['module_name'] ?? ''),
+                        'app_scope' => (string) ($app['app_scope'] ?? 'module'),
                        'required' => in_array((string) ($app['app_id'] ?? ''), [self::APP_ID], true),
                        'enabled' => in_array((string) ($app['app_id'] ?? ''), $enabledAppIds, true),
                    ],
-                    $visibleApps
+                    $installableApps
                ),
                'widgets' => array_map(
                    static fn (array $widget): array => [
@@ -135,8 +152,9 @@ final class UserSelfManagementService
                        'summary' => (string) ($widget['summary'] ?? ''),
                        'default_enabled' => (bool) ($widget['default_enabled'] ?? false),
                        'enabled' => in_array((string) ($widget['widget_id'] ?? ''), $activeWidgetIds, true),
+                        'source_app_id' => (string) ($widget['source_app_id'] ?? ''),
                    ],
-                    $widgets
+                    $availableWidgets
                ),
            ],
            'meta' => [
@@ -193,7 +211,9 @@ final class UserSelfManagementService
    private function normalizeSettings(array $settings, array $authUser, array $visibleApps, array $widgets, array $availableSkins): array
    {
        $visibleAppIds = array_values(array_filter(array_map(
-            static fn (array $app): string => (string) ($app['app_id'] ?? ''),
+            static fn (array $app): ?string => (!array_key_exists('installable', $app) || (bool) $app['installable'])
+                ? (string) ($app['app_id'] ?? '')
+                : null,
            $visibleApps
        )));
        $defaultEnabledAppIds = array_values(array_filter(array_map(
@@ -237,7 +257,18 @@ final class UserSelfManagementService
        ));
        $activeWidgetIds = $this->sanitizeSelection(
            array_merge($storedActiveWidgetIds, $newDefaultWidgetIds),
-            $allWidgetIds
+            array_values(array_filter($allWidgetIds, function (string $widgetId) use ($widgets, $enabledAppIds): bool {
+                foreach ($widgets as $widget) {
+                    if ((string) ($widget['widget_id'] ?? '') !== $widgetId) {
+                        continue;
+                    }
+
+                    $sourceAppId = trim((string) ($widget['source_app_id'] ?? ''));
+                    return $sourceAppId === '' || in_array($sourceAppId, $enabledAppIds, true);
+                }
+
+                return false;
+            }))
        );
        $profile = [];

--- a/src/Desktop/AppVisibility.php
+++ b/src/Desktop/AppVisibility.php
@@ -48,11 +48,16 @@ final class AppVisibility

        return array_values(array_filter($apps, static function (array $app) use ($lookup, $mandatoryLookup): bool {
            $appId = (string) ($app['app_id'] ?? '');
+            $installable = !array_key_exists('installable', $app) || (bool) $app['installable'];

            if ($appId === '') {
                return false;
            }

+            if (!$installable) {
+                return true;
+            }
+
            return isset($lookup[$appId]) || isset($mandatoryLookup[$appId]);
        }));
    }
--- a/src/Desktop/WidgetRegistry.php
+++ b/src/Desktop/WidgetRegistry.php
@@ -9,11 +9,29 @@ final class WidgetRegistry
    /** @var array<int, array<string, mixed>> */
    private array $widgets;

-    public function __construct(string $configPath)
+    /**
+     * @param array<int, array<string, mixed>> $additionalWidgets
+     */
+    public function __construct(string $configPath, array $additionalWidgets = [])
    {
        /** @var array<int, array<string, mixed>> $widgets */
        $widgets = require $configPath;
-        $this->widgets = $widgets;
+        $lookup = [];
+
+        foreach (array_merge($widgets, $additionalWidgets) as $widget) {
+            if (!is_array($widget)) {
+                continue;
+            }
+
+            $widgetId = (string) ($widget['widget_id'] ?? '');
+            if ($widgetId === '') {
+                continue;
+            }
+
+            $lookup[$widgetId] = $widget;
+        }
+
+        $this->widgets = array_values($lookup);
    }

    /**
@@ -25,15 +43,38 @@ final class WidgetRegistry
    }

    /**
-     * @param array<int, string> $widgetIds
+     * @param array<int, string> $enabledAppIds
     * @return array<int, array<string, mixed>>
     */
-    public function active(array $widgetIds): array
+    public function availableForApps(array $enabledAppIds): array
    {
-        $lookup = array_fill_keys($widgetIds, true);
+        $enabledLookup = array_fill_keys($enabledAppIds, true);

        return array_values(array_filter(
            $this->widgets,
+            static function (array $widget) use ($enabledLookup): bool {
+                $sourceAppId = trim((string) ($widget['source_app_id'] ?? ''));
+                if ($sourceAppId === '') {
+                    return true;
+                }
+
+                return isset($enabledLookup[$sourceAppId]);
+            }
+        ));
+    }
+
+    /**
+     * @param array<int, string> $widgetIds
+     * @param array<int, string> $enabledAppIds
+     * @return array<int, array<string, mixed>>
+     */
+    public function active(array $widgetIds, array $enabledAppIds = []): array
+    {
+        $lookup = array_fill_keys($widgetIds, true);
+        $available = $enabledAppIds === [] ? $this->widgets : $this->availableForApps($enabledAppIds);
+
+        return array_values(array_filter(
+            $available,
            static fn (array $widget): bool => isset($lookup[$widget['widget_id'] ?? ''])
        ));
    }
--- a/src/ModulesCore/LegacyCompat.php
+++ b/src/ModulesCore/LegacyCompat.php
@@ -436,6 +436,28 @@ namespace {
        }
    }

+    if (!function_exists('nexus_cron_timezone_name')) {
+        function nexus_cron_timezone_name(): string
+        {
+            $candidates = [
+                $_COOKIE['desktop_timezone'] ?? null,
+                $_SESSION['desktop_timezone'] ?? null,
+                getenv('DESKTOP_CRON_TIMEZONE') ?: null,
+                getenv('DESKTOP_TIMEZONE') ?: null,
+                'Europe/Berlin',
+            ];
+
+            foreach ($candidates as $candidate) {
+                $timezone = trim((string) $candidate);
+                if ($timezone !== '' && in_array($timezone, \DateTimeZone::listIdentifiers(), true)) {
+                    return $timezone;
+                }
+            }
+
+            return 'Europe/Berlin';
+        }
+    }
+
    if (!function_exists('auth_enabled')) {
        function auth_enabled(): bool
        {
--- a/src/ModulesCore/ModuleRegistry.php
+++ b/src/ModulesCore/ModuleRegistry.php
@@ -8,6 +8,12 @@ final class ModuleRegistry
 {
    /** @var array<int, array<string, mixed>>|null */
    private ?array $desktopApps = null;
+    /** @var array<int, array<string, mixed>>|null */
+    private ?array $widgets = null;
+    /** @var array<int, array<string, mixed>>|null */
+    private ?array $cronJobs = null;
+    /** @var array<string, array<string, mixed>>|null */
+    private ?array $manifests = null;

    public function __construct(
        private readonly string $modulesPath,
@@ -26,6 +32,12 @@ final class ModuleRegistry
        $apps = [];

        foreach ($this->moduleDirectories() as $moduleName => $modulePath) {
+            $manifest = $this->manifest($moduleName, $modulePath);
+            $desktopMeta = is_array($manifest['desktop'] ?? null) ? $manifest['desktop'] : [];
+            if (array_key_exists('available', $desktopMeta) && !$desktopMeta['available']) {
+                continue;
+            }
+
            $desktopConfigPath = $modulePath . '/desktop.php';
            if (!is_file($desktopConfigPath)) {
                continue;
@@ -36,7 +48,6 @@ final class ModuleRegistry
                continue;
            }

-            $manifest = $this->readJson($modulePath . '/module.json');
            $desktopConfig['module_id'] = $moduleName;
            $desktopConfig['title'] ??= (string) ($manifest['title'] ?? ucfirst($moduleName));
            $desktopConfig['summary'] ??= (string) ($manifest['description'] ?? '');
@@ -45,12 +56,67 @@ final class ModuleRegistry
                (array) ($manifest['auth']['groups'] ?? [])
            ));
            $desktopConfig['enabled_by_default'] ??= (bool) ($manifest['enabled_by_default'] ?? false);
+            $desktopConfig['app_scope'] ??= (string) ($manifest['app_scope'] ?? 'module');
+            $desktopConfig['installable'] ??= array_key_exists('installable', $manifest) ? (bool) $manifest['installable'] : true;
+            $desktopConfig['show_on_desktop'] ??= !array_key_exists('show_on_desktop', $desktopMeta) || (bool) $desktopMeta['show_on_desktop'];
+            $desktopConfig['show_in_start_menu'] ??= !array_key_exists('show_in_start_menu', $desktopMeta) || (bool) $desktopMeta['show_in_start_menu'];
+            $desktopConfig['supports_widget'] ??= $this->moduleWidgetsForManifest($moduleName, $manifest, $desktopConfig) !== [];
+            $desktopConfig['supports_cron'] ??= $this->moduleCronJobsForManifest($moduleName, $manifest, $desktopConfig) !== [];
            $apps[] = $desktopConfig;
        }

        return $this->desktopApps = $apps;
    }

+    /**
+     * @return array<int, array<string, mixed>>
+     */
+    public function widgets(): array
+    {
+        if ($this->widgets !== null) {
+            return $this->widgets;
+        }
+
+        $widgets = [];
+        foreach ($this->moduleDirectories() as $moduleName => $modulePath) {
+            $manifest = $this->manifest($moduleName, $modulePath);
+            foreach ($this->moduleWidgetsForManifest($moduleName, $manifest, null) as $widget) {
+                $widgets[] = $widget;
+            }
+        }
+
+        return $this->widgets = $widgets;
+    }
+
+    /**
+     * @return array<int, array<string, mixed>>
+     */
+    public function cronJobs(): array
+    {
+        if ($this->cronJobs !== null) {
+            return $this->cronJobs;
+        }
+
+        $jobs = [];
+        foreach ($this->moduleDirectories() as $moduleName => $modulePath) {
+            $manifest = $this->manifest($moduleName, $modulePath);
+            $desktopConfig = null;
+            $desktopConfigPath = $modulePath . '/desktop.php';
+            if (is_file($desktopConfigPath)) {
+                $loaded = require $desktopConfigPath;
+                if (is_array($loaded)) {
+                    $desktopConfig = $loaded;
+                }
+            }
+
+            foreach ($this->moduleCronJobsForManifest($moduleName, $manifest, $desktopConfig) as $job) {
+                $jobs[] = $job;
+            }
+        }
+
+        return $this->cronJobs = $jobs;
+    }
+
    public function modulePath(string $moduleName): ?string
    {
        $directories = $this->moduleDirectories();
@@ -84,6 +150,108 @@ final class ModuleRegistry
        return $directories;
    }

+    /**
+     * @return array<string, mixed>
+     */
+    private function manifest(string $moduleName, string $modulePath): array
+    {
+        if ($this->manifests === null) {
+            $this->manifests = [];
+        }
+
+        if (!array_key_exists($moduleName, $this->manifests)) {
+            $this->manifests[$moduleName] = $this->readJson($modulePath . '/module.json');
+        }
+
+        return $this->manifests[$moduleName];
+    }
+
+    /**
+     * @param array<string, mixed> $manifest
+     * @param array<string, mixed>|null $desktopConfig
+     * @return array<int, array<string, mixed>>
+     */
+    private function moduleWidgetsForManifest(string $moduleName, array $manifest, ?array $desktopConfig): array
+    {
+        $appId = (string) (($desktopConfig['app_id'] ?? null) ?: ($manifest['app_id'] ?? $moduleName));
+        $widgets = [];
+
+        foreach ((array) ($manifest['widgets'] ?? []) as $widget) {
+            if (!is_array($widget)) {
+                continue;
+            }
+
+            $widgetId = trim((string) ($widget['widget_id'] ?? ''));
+            $title = trim((string) ($widget['title'] ?? ''));
+            if ($widgetId === '' || $title === '') {
+                continue;
+            }
+
+            $widgets[] = [
+                'widget_id' => $widgetId,
+                'title' => $title,
+                'icon' => (string) ($widget['icon'] ?? strtoupper(substr($appId, 0, 2))),
+                'zone' => (string) ($widget['zone'] ?? 'sidebar'),
+                'default_enabled' => (bool) ($widget['default_enabled'] ?? false),
+                'supports_public_home' => (bool) ($widget['supports_public_home'] ?? false),
+                'summary' => (string) ($widget['summary'] ?? ''),
+                'content' => (string) ($widget['content'] ?? ''),
+                'launch_app_id' => (string) ($widget['launch_app_id'] ?? $appId),
+                'action_label' => (string) ($widget['action_label'] ?? 'Oeffnen'),
+                'widget_type' => (string) ($widget['widget_type'] ?? 'default'),
+                'status_api' => isset($widget['status_api']) ? (string) $widget['status_api'] : null,
+                'refresh_api' => isset($widget['refresh_api']) ? (string) $widget['refresh_api'] : null,
+                'source_app_id' => $appId,
+                'source_module_id' => $moduleName,
+                'actions' => is_array($widget['actions'] ?? null) ? array_values($widget['actions']) : [],
+            ];
+        }
+
+        return $widgets;
+    }
+
+    /**
+     * @param array<string, mixed> $manifest
+     * @param array<string, mixed>|null $desktopConfig
+     * @return array<int, array<string, mixed>>
+     */
+    private function moduleCronJobsForManifest(string $moduleName, array $manifest, ?array $desktopConfig): array
+    {
+        $appId = (string) (($desktopConfig['app_id'] ?? null) ?: ($manifest['app_id'] ?? $moduleName));
+        $jobs = [];
+
+        foreach ((array) ($manifest['cron_jobs'] ?? []) as $job) {
+            if (!is_array($job)) {
+                continue;
+            }
+
+            $jobId = trim((string) ($job['job_id'] ?? $job['name'] ?? ''));
+            $endpointPath = trim((string) ($job['endpoint_path'] ?? ''));
+            if ($jobId === '' || $endpointPath === '') {
+                continue;
+            }
+
+            $jobs[] = [
+                'job_key' => $moduleName . '.' . $jobId,
+                'job_id' => $jobId,
+                'module_id' => $moduleName,
+                'app_id' => $appId,
+                'app_scope' => (string) ($manifest['app_scope'] ?? 'module'),
+                'label' => trim((string) ($job['label'] ?? $jobId)),
+                'description' => trim((string) ($job['description'] ?? '')),
+                'endpoint_path' => $endpointPath,
+                'method' => strtoupper(trim((string) ($job['method'] ?? 'POST'))) ?: 'POST',
+                'payload' => is_array($job['payload'] ?? null) ? $job['payload'] : [],
+                'default_enabled' => (bool) ($job['default_enabled'] ?? false),
+                'default_cron' => trim((string) ($job['default_cron'] ?? '0 * * * *')) ?: '0 * * * *',
+                'default_timezone' => trim((string) ($job['default_timezone'] ?? '')) ?: 'Europe/Berlin',
+                'lock_minutes' => max(1, (int) ($job['lock_minutes'] ?? 10)),
+            ];
+        }
+
+        return $jobs;
+    }
+
    /**
     * @return array<string, mixed>
     */
--- a/temp/nexus-module-import/MODULE_DEVELOPMENT.md
+++ b/temp/nexus-module-import/MODULE_DEVELOPMENT.md
@@ -146,6 +146,14 @@ Weitere anerkannte Setup-Bausteine:
 - Für Anzeige- und Formatierungslogik nach Möglichkeit `nexus_display_timezone_name()` nutzen.
 - Für Cron-Fallbacks nach Möglichkeit `nexus_cron_timezone_name()` nutzen.
 - Neue Module dürfen keine lokalen Zeitzonen direkt in Datenbank-Zeitspalten persistieren.
+- Desktop-Faehigkeiten sollen im neuen Projekt zusaetzlich ueber Manifest-Metadaten beschrieben werden:
+  - `app_scope`
+  - `installable`
+  - `desktop.*`
+  - `widgets[]`
+  - `cron_jobs[]`
+- Widget-Funktionen eines Moduls sollen nur ueber die gemeinsame Desktop-Widget-Infrastruktur laufen.
+- Cron-Endpunkte eines Moduls sollen fuer die zentrale Cron-Verwaltung per HTTP-Endpunkt beschreibbar sein.

 14) Pi-Control-Besonderheiten
 - Worker und Jobs unter `/tools/pi_control/`