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Internal/de/PROJECT_CONTEXT.md

@@ -12,6 +12,8 @@ Papa-Kind-Treff ist eine PHP-basierte Plattform für Väter. Kernbereiche sind l
 - Die Community ist hierarchisch aufgebaut: Kategorien -> Boards -> Threads -> Posts.
 - Moderation ist vom normalen Community-Frontend getrennt.
 - Standortfunktionen sind relevant für lokale Events, Termine und Treffen.
+- Die bestehende `events`-Logik bleibt zunächst aktiv, wird aber künftig von einer allgemeineren Listing-/Ort-/Termin-Struktur abgelöst.
+- Seiten-Admins erhalten eine eigene System-Sektion für globale Betriebs- und Diensteschalter.
 
 ## Konto / Mitgliederbereich
 - Profil-Menü aktuell: `Profil`, `Kinder`, `Events`, `Community`, `Einstellungen`, `Abmelden`
@@ -26,6 +28,11 @@ Papa-Kind-Treff ist eine PHP-basierte Plattform für Väter. Kernbereiche sind l
 - Geschäftslogik unter `src/App/`
 - Globales Frontend vor allem über `public/assets/js/app.js` und `public/assets/css/app.css`
 
+## Neue Ausbaustufe: Termin-/Ort-System
+- Neue Tabellenbasis: `listing_places`, `listings`, `listing_occurrences`, `listing_prices`, `listing_benefits`, `listing_categories`
+- Ziel: spätere Unterscheidung zwischen eigenem Event, Partner-Angebot, allgemeinem Ort und redaktionellem Termin
+- Google ist noch nicht aktiv integriert; das System wird nur vorbereitend über Settings und Datenfelder darauf ausgelegt
+
 ## Pflegehinweis
 Bei Änderungen immer auch die parallelen Dateien in `Internal/en/` prüfen und inhaltlich gleichziehen.
 

Internal/de/PROJECT_STRUCTURE.md

@@ -16,6 +16,8 @@ Stand: 2026-08-03
 - aktive Styles: `src/App/Avatar/Lorelei.php`, `src/App/Avatar/Croodles.php`
 - Profil-/Kinder-/Event-Logik im Mitgliederbereich: `partials/landing/account/dashboard.php`
 - Consent- und rechtliche Texte: `public/page/datenschutz.php`
+- System-Einstellungen: `src/App/SystemSettings.php`
+- neue Listing-/Ort-Basis: `src/App/ListingCatalog.php`
 
 ## Dokumentationsregel
 Kanonische interne Dokumentation:

Internal/de/README.md

@@ -20,6 +20,8 @@ Papa-Kind-Treff ist eine PHP-basierte Plattform für Väter mit Fokus auf lokale
 - Konto-E-Mails sowie sensible Profilfelder werden app-seitig verschlüsselt gespeichert
 - Kinder können angelegt, bearbeitet und gelöscht werden
 - Profiladresse mit verschlüsselter Straße/Hausnummer, Adresssuche, Browser-Übernahme und Validierung
+- System-Sektion für Seiten-Admins mit Wartungs- und Diensteschaltern
+- neue Datenbasis für ein späteres Termin-, Ort- und Veranstaltungssystem angelegt
 
 ## Wording-Regel
 - Primärbegriff im Produkt: `Events`
@@ -32,6 +34,7 @@ Papa-Kind-Treff ist eine PHP-basierte Plattform für Väter mit Fokus auf lokale
 - App-Logik: `src/App/`
 - Assets: `public/assets/`
 - Datenbankschema: `schema.sql`
+- neue Basisklassen: `src/App/SystemSettings.php`, `src/App/ListingCatalog.php`
 
 ## Datenschutz und Sicherheit
 - Passwort-Hashes über Argon2id

Internal/en/PROJECT_CONTEXT.md

@@ -12,6 +12,8 @@ Papa-Kind-Treff is a PHP-based platform for fathers. Core areas are local events
 - The community is hierarchical: categories -> boards -> threads -> posts.
 - Moderation is separated from the normal community frontend.
 - Location features are important for local discovery.
+- The existing `events` logic remains active for now, but future growth should move toward a broader listing, place, and occurrence model.
+- Site admins get a dedicated system section for global operating and service flags.
 
 ## Account / Member Area
 - Profile menu currently contains `Profile`, `Children`, `Events`, `Community`, `Settings`, `Logout`.
@@ -26,6 +28,11 @@ Papa-Kind-Treff is a PHP-based platform for fathers. Core areas are local events
 - business logic under `src/App/`
 - global frontend mainly via `public/assets/js/app.js` and `public/assets/css/app.css`
 
+## New Expansion Stage: Listings and Places
+- New table base: `listing_places`, `listings`, `listing_occurrences`, `listing_prices`, `listing_benefits`, `listing_categories`
+- Goal: later distinguish between own event, partner offer, general place, and editorial event entry
+- Google is not integrated productively yet; the system is only being prepared for it via settings and data fields
+
 ## Maintenance Note
 - Whenever one of these files changes, the matching files in `Internal/de/` and `Internal/en/` must be kept aligned.
 - The root `README.md` acts as the startup document for new chats and should be reviewed alongside major context changes.

Internal/en/PROJECT_STRUCTURE.md

@@ -16,6 +16,8 @@ Updated: 2026-08-03
 - active avatar styles: `src/App/Avatar/Lorelei.php`, `src/App/Avatar/Croodles.php`
 - profile/children/event logic inside member area: `partials/landing/account/dashboard.php`
 - consent and legal texts: `public/page/datenschutz.php`
+- system settings: `src/App/SystemSettings.php`
+- new listing/place base: `src/App/ListingCatalog.php`
 
 ## Documentation Rule
 - canonical internal documentation lives in `Internal/de/` and `Internal/en/`

Internal/en/README.md

@@ -20,6 +20,8 @@ Papa-Kind-Treff is a PHP-based platform for fathers focused on local events, app
 - account emails and sensitive profile fields are stored encrypted application-side
 - children can be created, edited, and deleted
 - profile address supports encrypted street/house number, address search, browser import, and validation
+- system section for site admins with maintenance and service toggles
+- new data foundation prepared for a broader event, place, and listing system
 
 ## Core Wording Rule
 - Primary product term: `Events`
@@ -31,6 +33,7 @@ Papa-Kind-Treff is a PHP-based platform for fathers focused on local events, app
 - application logic: `src/App/`
 - assets: `public/assets/`
 - database schema: `schema.sql`
+- new base classes: `src/App/SystemSettings.php`, `src/App/ListingCatalog.php`
 
 ## Privacy and Security
 - password hashes via Argon2id

README.md

@@ -27,12 +27,15 @@ Papa-Kind-Treff ist eine PHP-basierte Plattform für Väter mit Fokus auf:
 - lokale Events, Termine und Treffen
 - Community-Austausch
 - geschützten Mitgliederbereich mit Profil, Kinderinfos und eigenen Events
+- neue Basis für ein übergreifendes Termin-, Ort- und Veranstaltungssystem
 
 ## Wichtige aktuelle Produktregeln
 - Primärbegriff im Produkt: `Events`
 - `Termine` und `Treffen` ergänzend in SEO- und Erklärungstexten
 - Hauptnavigation aktuell: `Home`, `Event Suche`, `Community`
 - Profil-Menü aktuell: `Profil`, `Kinder`, `Events`, `Community`, `Einstellungen`, `Abmelden`
+- neue interne Grundstruktur: `listing_places`, `listings`, `listing_occurrences`, `listing_prices`, `listing_benefits`
+- Seiten-Admins haben zusätzlich eine System-Sektion für globale Wartungs- und Diensteschalter
 
 ## Datenschutz und Sicherheit
 - sensible Profilfelder werden app-seitig verschlüsselt gespeichert

config/fileload.php

@@ -37,5 +37,47 @@ $app = \App\App::get();
 $app->session()->start();
 $clientId = $app->session()->ensureClientId();
 
+try {
+    $pdo = $app->pdo();
+    if ($pdo) {
+        $settings = new \App\SystemSettings($pdo);
+        $settings->ensureSchema();
+        if ($settings->getBool('site_maintenance_mode')) {
+            $isAdminUser = false;
+            if (isset($_SESSION['user_id'])) {
+                $communityCfg = __DIR__ . '/community.php';
+                $communityConfig = file_exists($communityCfg) ? require $communityCfg : [];
+                $communityAccess = new \App\CommunityAccess($pdo, $communityConfig);
+                $isAdminUser = $communityAccess->canManageApplications((int)$_SESSION['user_id']);
+            }
+
+            $uriPath = parse_url($_SERVER['REQUEST_URI'] ?? '/', PHP_URL_PATH) ?: '/';
+            $uriPath = preg_replace('~/{2,}~', '/', $uriPath);
+            $uriPath = trim($uriPath, '/');
+            $maintenanceWhitelist = [
+                'login',
+                'logout',
+                'verify',
+                'reset',
+                'impressum',
+                'datenschutz',
+            ];
+
+            if (!$isAdminUser && !in_array($uriPath, $maintenanceWhitelist, true)) {
+                http_response_code(503);
+                header('Retry-After: 600');
+                $message = htmlspecialchars(
+                    $settings->get('site_maintenance_message', 'Papa-Kind-Treff ist gerade kurz in Wartung. Bitte versuche es in Kürze erneut.') ?? '',
+                    ENT_QUOTES
+                );
+                echo '<!doctype html><html lang="de"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><title>Wartung</title><style>body{margin:0;font-family:sans-serif;background:#f6efe5;color:#243b53;display:grid;place-items:center;min-height:100vh;padding:24px}.card{max-width:680px;background:#fff;border:1px solid #e5d7c3;border-radius:20px;padding:28px;box-shadow:0 20px 60px rgba(36,59,83,.08)}h1{margin:0 0 12px;font-size:2rem}p{margin:0;line-height:1.6;color:#486581}</style></head><body><main class="card"><h1>Papa-Kind-Treff ist kurz in Wartung</h1><p>' . $message . '</p></main></body></html>';
+                exit;
+            }
+        }
+    }
+} catch (\Throwable) {
+    // Fail open to avoid locking the whole site on transient settings/schema issues.
+}
+
 // Optionally expose a single global for templates if desired
 $GLOBALS['client_id'] = $clientId;

partials/landing/account/dashboard.php

@@ -20,6 +20,9 @@ $sectionLinks = [
   'community' => 'Community',
   'settings' => 'Einstellungen',
 ];
+if (!empty($canManageSystemSettings)) {
+  $sectionLinks['system'] = 'System';
+}
 ?>
 <main class="section">
   <div class="container" style="display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:12px;">
@@ -336,6 +339,76 @@ $sectionLinks = [
           </section>
         <?php endif; ?>
 
+        <?php if ($section === 'system' && !empty($canManageSystemSettings)): ?>
+          <section class="account-panel">
+            <div class="account-panel__head">
+              <h2>System-Einstellungen</h2>
+              <p class="muted">Globale Schalter für Wartung, externe Ortsdaten und die neue Termin-/Ort-Basis.</p>
+            </div>
+            <div class="account-panel__body">
+              <form method="post" class="stack gap-12">
+                <input type="hidden" name="action" value="system_settings_update">
+
+                <div class="card">
+                  <strong>Wartung und Verfügbarkeit</strong>
+                  <div class="stack gap-10" style="margin-top:12px;">
+                    <label class="chip" style="cursor:pointer; align-items:flex-start;">
+                      <input type="checkbox" name="forum_maintenance_mode" value="1" <?= !empty($systemSettingsValues['forum_maintenance_mode']) && $systemSettingsValues['forum_maintenance_mode'] === '1' ? 'checked' : '' ?> style="margin-right:8px; margin-top:4px;">
+                      <span>Forum-Wartungsmodus aktivieren
+                        <span class="muted small" style="display:block;">Die Community bleibt sichtbar, aber neue Themen und Antworten werden für normale Nutzer gesperrt.</span>
+                      </span>
+                    </label>
+                    <label class="chip" style="cursor:pointer; align-items:flex-start;">
+                      <input type="checkbox" name="site_maintenance_mode" value="1" <?= !empty($systemSettingsValues['site_maintenance_mode']) && $systemSettingsValues['site_maintenance_mode'] === '1' ? 'checked' : '' ?> style="margin-right:8px; margin-top:4px;">
+                      <span>Seiten-Wartungsmodus aktivieren
+                        <span class="muted small" style="display:block;">Normale Nutzer sehen dann statt der Website eine Wartungsseite. Seiten-Admins bleiben weiterhin im System.</span>
+                      </span>
+                    </label>
+                    <div class="stack gap-6">
+                      <label class="label" for="siteMaintenanceMessage">Wartungshinweis</label>
+                      <textarea id="siteMaintenanceMessage" name="site_maintenance_message" class="textarea" rows="3"><?= htmlspecialchars((string)($systemSettingsValues['site_maintenance_message'] ?? ''), ENT_QUOTES) ?></textarea>
+                    </div>
+                  </div>
+                </div>
+
+                <div class="card">
+                  <strong>Orts- und Bewertungsdienste</strong>
+                  <div class="stack gap-10" style="margin-top:12px;">
+                    <label class="chip" style="cursor:pointer; align-items:flex-start;">
+                      <input type="checkbox" name="google_places_enabled" value="1" <?= !empty($systemSettingsValues['google_places_enabled']) && $systemSettingsValues['google_places_enabled'] === '1' ? 'checked' : '' ?> style="margin-right:8px; margin-top:4px;">
+                      <span>Google Places vorbereitend aktivieren
+                        <span class="muted small" style="display:block;">Aktuell noch ohne produktive Anbindung. Der Schalter ist als technische Vorbereitung für spätere Place-ID-, Bewertungs- und Review-Anreicherung gedacht.</span>
+                      </span>
+                    </label>
+                    <div class="stack gap-6">
+                      <label class="label" for="placeDataProvider">Standardanbieter für Ortsdaten</label>
+                      <select id="placeDataProvider" name="place_data_provider" class="select">
+                        <option value="osm" <?= (($systemSettingsValues['place_data_provider'] ?? 'osm') === 'osm') ? 'selected' : '' ?>>OpenStreetMap / Nominatim</option>
+                        <option value="osm_google_optional" <?= (($systemSettingsValues['place_data_provider'] ?? 'osm') === 'osm_google_optional') ? 'selected' : '' ?>>OpenStreetMap primär, Google optional</option>
+                      </select>
+                      <p class="muted small">So bleibt eine kostenfreie Basis aktiv, während Google später zusätzlich vorbereitet werden kann.</p>
+                    </div>
+                  </div>
+                </div>
+
+                <div class="flex gap-12">
+                  <button class="btn" type="submit">System-Einstellungen speichern</button>
+                </div>
+              </form>
+
+              <div class="card" style="margin-top:18px;">
+                <strong>Status der neuen Termin-/Ort-Basis</strong>
+                <ul class="dash-list" style="margin-top:12px;">
+                  <li>Neue Tabellenbasis: <?= !empty($listingCatalogStatus['complete']) ? 'Vollständig initialisiert' : 'Noch unvollständig' ?></li>
+                  <li>Geplante Grundtypen: Event, Partner-Angebot, Ort, redaktioneller Termin</li>
+                  <li>Geplante Zusatzlogik: Kategorien, Serientermine, Preise, Gutscheine, Kapazitäten</li>
+                  <li>Fehlende Tabellen: <?= !empty($listingCatalogStatus['missing']) ? htmlspecialchars(implode(', ', $listingCatalogStatus['missing']), ENT_QUOTES) : 'Keine' ?></li>
+                </ul>
+              </div>
+            </div>
+          </section>
+        <?php endif; ?>
+
       </div>
     </div>
   </div>

partials/landing/community/index.php

@@ -12,6 +12,9 @@ $boardSlug = trim((string)($_GET['board'] ?? ''));
 $communityCfg = require __DIR__ . '/../../../config/community.php';
 $community = $pdo ? new \App\Community($pdo, $communityCfg) : null;
 $access = $pdo ? new \App\CommunityAccess($pdo, $communityCfg) : null;
+$systemSettings = $pdo ? new \App\SystemSettings($pdo) : null;
+$forumMaintenanceMode = $systemSettings ? $systemSettings->getBool('forum_maintenance_mode') : false;
+$isForumAdmin = ($access && $userId) ? $access->canModerateForum((int)$userId) : false;
 
 $forumCategories = $community ? $community->listForumCategories() : [];
 $selectedBoard = ($community && $boardSlug !== '') ? $community->getBoardBySlug($boardSlug) : null;
@@ -23,6 +26,9 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST' && $community && $access) {
             if (!$userId) {
                 throw new \RuntimeException('Bitte einloggen, um Themen zu erstellen.');
             }
+            if ($forumMaintenanceMode && !$isForumAdmin) {
+                throw new \RuntimeException('Die Community ist aktuell im Wartungsmodus. Neue Themen sind vorübergehend deaktiviert.');
+            }
             if (!$access->canCreateThread((int)$userId)) {
                 $state = $access->getRestrictionState((int)$userId);
                 throw new \RuntimeException($state['reason'] ?: 'Du darfst aktuell keine Themen erstellen.');
@@ -67,8 +73,10 @@ $threads = $community
           </div>
         </form>
         <div class="forum-hero__cta">
-          <?php if ($userId): ?>
+          <?php if ($userId && !$forumMaintenanceMode): ?>
             <button class="btn" type="button" data-modal-open="modalThread">Neues Thema</button>
+          <?php elseif ($userId): ?>
+            <button class="btn ghost" type="button" disabled>Wartungsmodus aktiv</button>
           <?php else: ?>
             <a class="btn" href="/login">Einloggen und schreiben</a>
           <?php endif; ?>
@@ -82,6 +90,11 @@ $threads = $community
     <?php if ($info): ?>
       <div class="toast-bar" style="margin-top:14px;"><?= htmlspecialchars($info, ENT_QUOTES) ?></div>
     <?php endif; ?>
+    <?php if ($forumMaintenanceMode): ?>
+      <div class="toast-bar" style="margin-top:14px; border-color:#d4a857; color:#7c5a17;">
+        Die Community ist aktuell im Wartungsmodus. Lesen bleibt möglich, neue Themen und Antworten sind für normale Nutzer vorübergehend deaktiviert.
+      </div>
+    <?php endif; ?>
 
     <?php if ($selectedBoard): ?>
       <div class="forum-shell">
@@ -239,7 +252,7 @@ $threads = $community
   </div>
 </main>
 
-<?php if ($userId): ?>
+<?php if ($userId && !$forumMaintenanceMode): ?>
 <div class="modal" id="modalThread">
   <div class="panel">
     <div class="head flex between center-y">

partials/landing/community/thread.php

@@ -12,6 +12,8 @@ $editPostId = (int)($_GET['edit_post'] ?? 0);
 $communityCfg = require __DIR__ . '/../../../config/community.php';
 $community = $pdo ? new \App\Community($pdo, $communityCfg) : null;
 $access = $pdo ? new \App\CommunityAccess($pdo, $communityCfg) : null;
+$systemSettings = $pdo ? new \App\SystemSettings($pdo) : null;
+$forumMaintenanceMode = $systemSettings ? $systemSettings->getBool('forum_maintenance_mode') : false;
 $forumCategories = $community ? $community->listForumCategories() : [];
 
 if ($_SERVER['REQUEST_METHOD'] === 'POST' && $community && $access) {
@@ -21,6 +23,9 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST' && $community && $access) {
             if (!$userId) {
                 throw new \RuntimeException('Bitte einloggen, um zu antworten.');
             }
+            if ($forumMaintenanceMode && !($access && $access->canModerateForum((int)$userId))) {
+                throw new \RuntimeException('Die Community ist aktuell im Wartungsmodus. Antworten sind vorübergehend deaktiviert.');
+            }
             if (!$access->canReply((int)$userId)) {
                 $state = $access->getRestrictionState((int)$userId);
                 throw new \RuntimeException($state['reason'] ?: 'Du darfst aktuell nicht antworten.');
@@ -151,6 +156,11 @@ $userVotes = ($access && $userId) ? $access->getUserPostVotes((int)$userId, $pos
         <?php if ($info): ?>
           <div class="toast-bar" style="margin-bottom:14px;"><?= htmlspecialchars($info, ENT_QUOTES) ?></div>
         <?php endif; ?>
+        <?php if ($forumMaintenanceMode): ?>
+          <div class="toast-bar" style="margin-bottom:14px; border-color:#d4a857; color:#7c5a17;">
+            Die Community ist aktuell im Wartungsmodus. Lesen bleibt möglich, neue Antworten nur für Admins.
+          </div>
+        <?php endif; ?>
 
         <article class="forum-post forum-post--lead">
           <aside class="forum-post__author">
@@ -290,7 +300,7 @@ $userVotes = ($access && $userId) ? $access->getUserPostVotes((int)$userId, $pos
           <?php endif; ?>
         </div>
 
-        <?php if ($userId): ?>
+        <?php if ($userId && !$forumMaintenanceMode): ?>
           <?php if ($userRestrictions['reply_blocked']): ?>
             <div class="forum-login-note">Du darfst aktuell keine Antworten schreiben. <?= !empty($userRestrictions['reason']) ? htmlspecialchars((string)$userRestrictions['reason'], ENT_QUOTES) : '' ?></div>
           <?php else: ?>
@@ -303,6 +313,8 @@ $userVotes = ($access && $userId) ? $access->getUserPostVotes((int)$userId, $pos
               <button class="btn" type="submit">Antwort senden</button>
             </form>
           <?php endif; ?>
+        <?php elseif ($userId): ?>
+          <div class="forum-login-note">Die Community ist aktuell im Wartungsmodus. Antworten sind vorübergehend deaktiviert.</div>
         <?php else: ?>
           <div class="forum-login-note">Bitte <a href="/login">einloggen</a>, um zu antworten.</div>
         <?php endif; ?>

partials/structure/layout_start.php

@@ -15,6 +15,7 @@ if (!in_array($childGender, ['male', 'female', 'mixed'], true)) {
 $debugEnabled = defined('APP_DEBUG') && APP_DEBUG === true;
 $locationTrackingPreference = 'prompt';
 $showDebugTools = false;
+$adminSystemNotice = null;
 if (isset($_SESSION['user_id'])) {
     try {
         $pdo = $app->pdo();
@@ -25,10 +26,30 @@ if (isset($_SESSION['user_id'])) {
             $communityConfig = file_exists($communityCfg) ? require $communityCfg : [];
             $communityAccess = new \App\CommunityAccess($pdo, $communityConfig);
             $showDebugTools = $debugEnabled && $communityAccess->hasRole((int)$_SESSION['user_id'], 'site_admin');
+            if ($communityAccess->canManageApplications((int)$_SESSION['user_id'])) {
+                $systemSettings = new \App\SystemSettings($pdo);
+                $siteMaintenanceMode = $systemSettings->getBool('site_maintenance_mode');
+                $forumMaintenanceMode = $systemSettings->getBool('forum_maintenance_mode');
+                $googlePlacesEnabled = $systemSettings->getBool('google_places_enabled');
+                $parts = [];
+                if ($siteMaintenanceMode) {
+                    $parts[] = 'Seiten-Wartungsmodus aktiv';
+                }
+                if ($forumMaintenanceMode) {
+                    $parts[] = 'Forum-Wartungsmodus aktiv';
+                }
+                if ($googlePlacesEnabled) {
+                    $parts[] = 'Google-Places-Vorbereitung aktiv';
+                }
+                if ($parts !== []) {
+                    $adminSystemNotice = implode(' · ', $parts);
+                }
+            }
         }
     } catch (\Throwable) {
         $locationTrackingPreference = 'prompt';
         $showDebugTools = false;
+        $adminSystemNotice = null;
     }
 }
 $debugFiles = [];
@@ -105,6 +126,11 @@ if ($debugEnabled) {
 </script>
 <?php tpl('matomo', 'structure'); ?>
 <?php tpl('nav', 'structure'); ?>
+<?php if ($adminSystemNotice !== null): ?>
+  <div class="container" style="margin-top:14px;">
+    <div class="toast-bar" style="border-color:#d4a857; color:#7c5a17;"><?= htmlspecialchars($adminSystemNotice, ENT_QUOTES) ?></div>
+  </div>
+<?php endif; ?>
 <div class="cookie-consent" id="cookieConsentBanner" hidden>
   <div class="cookie-consent__inner">
     <div class="cookie-consent__copy">

partials/structure/nav.php

@@ -4,6 +4,7 @@ $isLoggedIn = isset($_SESSION['user_id']);
 $displayName = 'Profil';
 $profileInitial = 'P';
 $showAdminLink = false;
+$showSystemLink = false;
 
 if ($isLoggedIn) {
     try {
@@ -25,12 +26,14 @@ if ($isLoggedIn) {
                 $communityConfig = require $communityCfg;
                 $communityAccess = new \App\CommunityAccess($pdo, $communityConfig);
                 $showAdminLink = $communityAccess->canModerateForum((int)$_SESSION['user_id']);
+                $showSystemLink = $communityAccess->canManageApplications((int)$_SESSION['user_id']);
             }
         }
     } catch (\Throwable) {
         $displayName = 'Profil';
         $profileInitial = 'P';
         $showAdminLink = false;
+        $showSystemLink = false;
     }
 }
 ?>
@@ -61,6 +64,9 @@ if ($isLoggedIn) {
             <a href="/dashboard?section=events" role="menuitem">Events</a>
             <a href="/dashboard?section=community" role="menuitem">Community</a>
             <a href="/dashboard?section=settings" role="menuitem">Einstellungen</a>
+            <?php if ($showSystemLink): ?>
+              <a href="/dashboard?section=system" role="menuitem">System</a>
+            <?php endif; ?>
             <?php if ($showAdminLink): ?>
               <a href="/community-admin" role="menuitem">Admin</a>
             <?php endif; ?>
@@ -84,6 +90,9 @@ if ($isLoggedIn) {
       <a class="btn ghost" href="/dashboard?section=events">Events</a>
       <a class="btn ghost" href="/dashboard?section=community">Community</a>
       <a class="btn ghost" href="/dashboard?section=settings">Einstellungen</a>
+      <?php if ($showSystemLink): ?>
+        <a class="btn ghost" href="/dashboard?section=system">System</a>
+      <?php endif; ?>
       <?php if ($showAdminLink): ?>
         <a class="btn ghost" href="/community-admin">Admin</a>
       <?php endif; ?>

schema.sql

@@ -115,6 +115,143 @@ CREATE TABLE event_participants (
   CONSTRAINT fk_ep_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
+CREATE TABLE system_settings (
+  `key` VARCHAR(120) NOT NULL PRIMARY KEY,
+  `value` TEXT NULL,
+  updated_by BIGINT UNSIGNED NULL,
+  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  CONSTRAINT fk_system_settings_updated_by FOREIGN KEY (updated_by) REFERENCES users(id) ON DELETE SET NULL
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE listing_categories (
+  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+  slug VARCHAR(120) NOT NULL UNIQUE,
+  title VARCHAR(160) NOT NULL,
+  category_group ENUM('general','event','place','food','family','partner') NOT NULL DEFAULT 'general',
+  sort_order SMALLINT UNSIGNED NOT NULL DEFAULT 0,
+  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE listing_places (
+  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+  created_by BIGINT UNSIGNED NULL,
+  source_type ENUM('user','partner','admin','system') NOT NULL DEFAULT 'user',
+  title VARCHAR(180) NOT NULL,
+  description TEXT NULL,
+  street VARCHAR(180) NULL,
+  zip CHAR(5) NULL,
+  city VARCHAR(120) NULL,
+  region VARCHAR(120) NULL,
+  lat DECIMAL(10,7) NULL,
+  lng DECIMAL(10,7) NULL,
+  website_url VARCHAR(255) NULL,
+  phone VARCHAR(60) NULL,
+  place_kind VARCHAR(80) NULL,
+  provider_hint ENUM('manual','osm','google') NOT NULL DEFAULT 'manual',
+  external_place_id VARCHAR(190) NULL,
+  google_place_id VARCHAR(190) NULL,
+  rating_value DECIMAL(3,2) NULL,
+  rating_count INT UNSIGNED NULL,
+  status ENUM('draft','published','archived') NOT NULL DEFAULT 'published',
+  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  CONSTRAINT fk_listing_places_user FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE SET NULL,
+  INDEX idx_listing_places_city (city),
+  INDEX idx_listing_places_region (region),
+  INDEX idx_listing_places_latlng (lat,lng),
+  INDEX idx_listing_places_kind (place_kind)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE listings (
+  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+  created_by BIGINT UNSIGNED NULL,
+  owner_type ENUM('user','partner','admin','system') NOT NULL DEFAULT 'user',
+  listing_type ENUM('event','partner_offer','place','editorial_event') NOT NULL DEFAULT 'event',
+  primary_place_id BIGINT UNSIGNED NULL,
+  title VARCHAR(200) NOT NULL,
+  teaser_public VARCHAR(280) NOT NULL,
+  description TEXT NOT NULL,
+  visibility ENUM('public','members') NOT NULL DEFAULT 'public',
+  status ENUM('draft','published','cancelled','archived') NOT NULL DEFAULT 'draft',
+  supports_registration TINYINT(1) NOT NULL DEFAULT 0,
+  supports_capacity TINYINT(1) NOT NULL DEFAULT 0,
+  supports_pricing TINYINT(1) NOT NULL DEFAULT 0,
+  is_recurring TINYINT(1) NOT NULL DEFAULT 0,
+  legacy_event_id BIGINT UNSIGNED NULL,
+  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  CONSTRAINT fk_listings_user FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE SET NULL,
+  CONSTRAINT fk_listings_place FOREIGN KEY (primary_place_id) REFERENCES listing_places(id) ON DELETE SET NULL,
+  CONSTRAINT fk_listings_legacy_event FOREIGN KEY (legacy_event_id) REFERENCES events(id) ON DELETE SET NULL,
+  INDEX idx_listings_type (listing_type),
+  INDEX idx_listings_status (status),
+  INDEX idx_listings_owner (owner_type)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE listing_category_map (
+  listing_id BIGINT UNSIGNED NOT NULL,
+  category_id BIGINT UNSIGNED NOT NULL,
+  PRIMARY KEY (listing_id, category_id),
+  CONSTRAINT fk_lcm_listing FOREIGN KEY (listing_id) REFERENCES listings(id) ON DELETE CASCADE,
+  CONSTRAINT fk_lcm_category FOREIGN KEY (category_id) REFERENCES listing_categories(id) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE listing_occurrences (
+  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+  listing_id BIGINT UNSIGNED NOT NULL,
+  occurrence_type ENUM('single','series','range','open_ended') NOT NULL DEFAULT 'single',
+  starts_at DATETIME NULL,
+  ends_at DATETIME NULL,
+  recurrence_rule VARCHAR(255) NULL,
+  recurrence_until DATETIME NULL,
+  capacity_total SMALLINT UNSIGNED NULL,
+  booking_url VARCHAR(255) NULL,
+  status ENUM('scheduled','cancelled','sold_out') NOT NULL DEFAULT 'scheduled',
+  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  CONSTRAINT fk_listing_occurrences_listing FOREIGN KEY (listing_id) REFERENCES listings(id) ON DELETE CASCADE,
+  INDEX idx_listing_occurrences_start (starts_at),
+  INDEX idx_listing_occurrences_type (occurrence_type),
+  INDEX idx_listing_occurrences_status (status)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE listing_prices (
+  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+  listing_id BIGINT UNSIGNED NOT NULL,
+  occurrence_id BIGINT UNSIGNED NULL,
+  label VARCHAR(120) NOT NULL,
+  audience ENUM('general','adult','child','family','group') NOT NULL DEFAULT 'general',
+  price_type ENUM('free','fixed','from','up_to','range','request') NOT NULL DEFAULT 'fixed',
+  amount DECIMAL(10,2) NULL,
+  amount_secondary DECIMAL(10,2) NULL,
+  currency CHAR(3) NOT NULL DEFAULT 'EUR',
+  note VARCHAR(255) NULL,
+  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  CONSTRAINT fk_listing_prices_listing FOREIGN KEY (listing_id) REFERENCES listings(id) ON DELETE CASCADE,
+  CONSTRAINT fk_listing_prices_occurrence FOREIGN KEY (occurrence_id) REFERENCES listing_occurrences(id) ON DELETE CASCADE,
+  INDEX idx_listing_prices_listing (listing_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+CREATE TABLE listing_benefits (
+  id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+  listing_id BIGINT UNSIGNED NOT NULL,
+  occurrence_id BIGINT UNSIGNED NULL,
+  benefit_type ENUM('voucher_code','voucher_hint','discount_text') NOT NULL DEFAULT 'voucher_hint',
+  title VARCHAR(160) NOT NULL,
+  code VARCHAR(120) NULL,
+  description TEXT NULL,
+  valid_from DATETIME NULL,
+  valid_until DATETIME NULL,
+  is_public TINYINT(1) NOT NULL DEFAULT 1,
+  created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  CONSTRAINT fk_listing_benefits_listing FOREIGN KEY (listing_id) REFERENCES listings(id) ON DELETE CASCADE,
+  CONSTRAINT fk_listing_benefits_occurrence FOREIGN KEY (occurrence_id) REFERENCES listing_occurrences(id) ON DELETE CASCADE,
+  INDEX idx_listing_benefits_listing (listing_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
 -- Community / Forum
 CREATE TABLE forum_categories (
   id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,

src/App/AccountPages.php

@@ -174,8 +174,21 @@ final class AccountPages
         $communityAccess = $pdo ? new CommunityAccess($pdo, $communityConfig) : null;
         $communityMigration = $pdo ? new CommunityMigration($pdo) : null;
         $profileSettings = $pdo ? new ProfileSettings($pdo) : null;
+        $systemSettings = $pdo ? new SystemSettings($pdo) : null;
+        $listingCatalog = $pdo ? new ListingCatalog($pdo) : null;
         $section = (string)($_GET['section'] ?? 'profile');
+        $canManageSystemSettings = $communityAccess ? $communityAccess->canManageApplications($userId) : false;
         $allowedSections = ['profile', 'children', 'events', 'community', 'settings'];
+        if ($canManageSystemSettings) {
+            $allowedSections[] = 'system';
+        }
+
+        if ($systemSettings) {
+            $systemSettings->ensureSchema();
+        }
+        if ($listingCatalog) {
+            $listingCatalog->ensureSchema();
+        }
 
         if ($_SERVER['REQUEST_METHOD'] === 'POST') {
             $action = $_POST['action'] ?? '';
@@ -273,6 +286,26 @@ final class AccountPages
                         );
                     }
                     $info = 'Einstellungen gespeichert.';
+                } elseif ($action === 'system_settings_update') {
+                    if (!$canManageSystemSettings || !$systemSettings) {
+                        throw new \RuntimeException('Keine Berechtigung für die System-Einstellungen.');
+                    }
+                    $siteMaintenanceMessage = trim((string)($_POST['site_maintenance_message'] ?? ''));
+                    if ($siteMaintenanceMessage === '') {
+                        $siteMaintenanceMessage = 'Papa-Kind-Treff ist gerade kurz in Wartung. Bitte versuche es in Kürze erneut.';
+                    }
+                    $placeDataProvider = (string)($_POST['place_data_provider'] ?? 'osm');
+                    if (!in_array($placeDataProvider, ['osm', 'osm_google_optional'], true)) {
+                        $placeDataProvider = 'osm';
+                    }
+                    $systemSettings->updateMany([
+                        'google_places_enabled' => isset($_POST['google_places_enabled']) ? '1' : '0',
+                        'forum_maintenance_mode' => isset($_POST['forum_maintenance_mode']) ? '1' : '0',
+                        'site_maintenance_mode' => isset($_POST['site_maintenance_mode']) ? '1' : '0',
+                        'site_maintenance_message' => $siteMaintenanceMessage,
+                        'place_data_provider' => $placeDataProvider,
+                    ], $userId);
+                    $info = 'System-Einstellungen gespeichert.';
                 } elseif ($action === 'child_add' || $action === 'child_update') {
                     $crypto = self::requireCrypto($crypto, 'Kinder');
                     $childId = (int)($_POST['child_id'] ?? 0);
@@ -588,6 +621,8 @@ final class AccountPages
             'reply_blocked' => false,
             'reason' => null,
         ];
+        $systemSettingsValues = $systemSettings ? $systemSettings->getAll() : [];
+        $listingCatalogStatus = $listingCatalog ? $listingCatalog->status() : ['complete' => false, 'missing' => [], 'tables' => []];
         if (!in_array($section, $allowedSections, true)) {
             $section = 'profile';
         }
@@ -609,6 +644,9 @@ final class AccountPages
             'communityApplication',
             'communityCanApply',
             'communityRestrictions',
+            'canManageSystemSettings',
+            'systemSettingsValues',
+            'listingCatalogStatus',
             'avatarBuilder',
             'section',
             'allowedSections'

src/App/ListingCatalog.php

@@ -0,0 +1,214 @@
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class ListingCatalog
+{
+    private array $tableCache = [];
+
+    public function __construct(private \PDO $pdo)
+    {
+    }
+
+    public function ensureSchema(): void
+    {
+        $statements = [
+            'CREATE TABLE IF NOT EXISTS listing_categories (
+                id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+                slug VARCHAR(120) NOT NULL UNIQUE,
+                title VARCHAR(160) NOT NULL,
+                category_group ENUM("general","event","place","food","family","partner") NOT NULL DEFAULT "general",
+                sort_order SMALLINT UNSIGNED NOT NULL DEFAULT 0,
+                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci',
+            'CREATE TABLE IF NOT EXISTS listing_places (
+                id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+                created_by BIGINT UNSIGNED NULL,
+                source_type ENUM("user","partner","admin","system") NOT NULL DEFAULT "user",
+                title VARCHAR(180) NOT NULL,
+                description TEXT NULL,
+                street VARCHAR(180) NULL,
+                zip CHAR(5) NULL,
+                city VARCHAR(120) NULL,
+                region VARCHAR(120) NULL,
+                lat DECIMAL(10,7) NULL,
+                lng DECIMAL(10,7) NULL,
+                website_url VARCHAR(255) NULL,
+                phone VARCHAR(60) NULL,
+                place_kind VARCHAR(80) NULL,
+                provider_hint ENUM("manual","osm","google") NOT NULL DEFAULT "manual",
+                external_place_id VARCHAR(190) NULL,
+                google_place_id VARCHAR(190) NULL,
+                rating_value DECIMAL(3,2) NULL,
+                rating_count INT UNSIGNED NULL,
+                status ENUM("draft","published","archived") NOT NULL DEFAULT "published",
+                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+                CONSTRAINT fk_listing_places_user FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE SET NULL,
+                INDEX idx_listing_places_city (city),
+                INDEX idx_listing_places_region (region),
+                INDEX idx_listing_places_latlng (lat, lng),
+                INDEX idx_listing_places_kind (place_kind)
+            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci',
+            'CREATE TABLE IF NOT EXISTS listings (
+                id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+                created_by BIGINT UNSIGNED NULL,
+                owner_type ENUM("user","partner","admin","system") NOT NULL DEFAULT "user",
+                listing_type ENUM("event","partner_offer","place","editorial_event") NOT NULL DEFAULT "event",
+                primary_place_id BIGINT UNSIGNED NULL,
+                title VARCHAR(200) NOT NULL,
+                teaser_public VARCHAR(280) NOT NULL,
+                description TEXT NOT NULL,
+                visibility ENUM("public","members") NOT NULL DEFAULT "public",
+                status ENUM("draft","published","cancelled","archived") NOT NULL DEFAULT "draft",
+                supports_registration TINYINT(1) NOT NULL DEFAULT 0,
+                supports_capacity TINYINT(1) NOT NULL DEFAULT 0,
+                supports_pricing TINYINT(1) NOT NULL DEFAULT 0,
+                is_recurring TINYINT(1) NOT NULL DEFAULT 0,
+                legacy_event_id BIGINT UNSIGNED NULL,
+                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+                CONSTRAINT fk_listings_user FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE SET NULL,
+                CONSTRAINT fk_listings_place FOREIGN KEY (primary_place_id) REFERENCES listing_places(id) ON DELETE SET NULL,
+                CONSTRAINT fk_listings_legacy_event FOREIGN KEY (legacy_event_id) REFERENCES events(id) ON DELETE SET NULL,
+                INDEX idx_listings_type (listing_type),
+                INDEX idx_listings_status (status),
+                INDEX idx_listings_owner (owner_type)
+            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci',
+            'CREATE TABLE IF NOT EXISTS listing_category_map (
+                listing_id BIGINT UNSIGNED NOT NULL,
+                category_id BIGINT UNSIGNED NOT NULL,
+                PRIMARY KEY (listing_id, category_id),
+                CONSTRAINT fk_lcm_listing FOREIGN KEY (listing_id) REFERENCES listings(id) ON DELETE CASCADE,
+                CONSTRAINT fk_lcm_category FOREIGN KEY (category_id) REFERENCES listing_categories(id) ON DELETE CASCADE
+            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci',
+            'CREATE TABLE IF NOT EXISTS listing_occurrences (
+                id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+                listing_id BIGINT UNSIGNED NOT NULL,
+                occurrence_type ENUM("single","series","range","open_ended") NOT NULL DEFAULT "single",
+                starts_at DATETIME NULL,
+                ends_at DATETIME NULL,
+                recurrence_rule VARCHAR(255) NULL,
+                recurrence_until DATETIME NULL,
+                capacity_total SMALLINT UNSIGNED NULL,
+                booking_url VARCHAR(255) NULL,
+                status ENUM("scheduled","cancelled","sold_out") NOT NULL DEFAULT "scheduled",
+                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+                CONSTRAINT fk_listing_occurrences_listing FOREIGN KEY (listing_id) REFERENCES listings(id) ON DELETE CASCADE,
+                INDEX idx_listing_occurrences_start (starts_at),
+                INDEX idx_listing_occurrences_type (occurrence_type),
+                INDEX idx_listing_occurrences_status (status)
+            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci',
+            'CREATE TABLE IF NOT EXISTS listing_prices (
+                id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+                listing_id BIGINT UNSIGNED NOT NULL,
+                occurrence_id BIGINT UNSIGNED NULL,
+                label VARCHAR(120) NOT NULL,
+                audience ENUM("general","adult","child","family","group") NOT NULL DEFAULT "general",
+                price_type ENUM("free","fixed","from","up_to","range","request") NOT NULL DEFAULT "fixed",
+                amount DECIMAL(10,2) NULL,
+                amount_secondary DECIMAL(10,2) NULL,
+                currency CHAR(3) NOT NULL DEFAULT "EUR",
+                note VARCHAR(255) NULL,
+                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+                CONSTRAINT fk_listing_prices_listing FOREIGN KEY (listing_id) REFERENCES listings(id) ON DELETE CASCADE,
+                CONSTRAINT fk_listing_prices_occurrence FOREIGN KEY (occurrence_id) REFERENCES listing_occurrences(id) ON DELETE CASCADE,
+                INDEX idx_listing_prices_listing (listing_id)
+            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci',
+            'CREATE TABLE IF NOT EXISTS listing_benefits (
+                id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+                listing_id BIGINT UNSIGNED NOT NULL,
+                occurrence_id BIGINT UNSIGNED NULL,
+                benefit_type ENUM("voucher_code","voucher_hint","discount_text") NOT NULL DEFAULT "voucher_hint",
+                title VARCHAR(160) NOT NULL,
+                code VARCHAR(120) NULL,
+                description TEXT NULL,
+                valid_from DATETIME NULL,
+                valid_until DATETIME NULL,
+                is_public TINYINT(1) NOT NULL DEFAULT 1,
+                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+                CONSTRAINT fk_listing_benefits_listing FOREIGN KEY (listing_id) REFERENCES listings(id) ON DELETE CASCADE,
+                CONSTRAINT fk_listing_benefits_occurrence FOREIGN KEY (occurrence_id) REFERENCES listing_occurrences(id) ON DELETE CASCADE,
+                INDEX idx_listing_benefits_listing (listing_id)
+            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci',
+        ];
+
+        foreach ($statements as $sql) {
+            $this->pdo->exec($sql);
+        }
+
+        $seed = $this->pdo->prepare(
+            'INSERT INTO listing_categories (slug, title, category_group, sort_order)
+             VALUES (:slug, :title, :groupName, :sortOrder)
+             ON DUPLICATE KEY UPDATE title = VALUES(title), category_group = VALUES(category_group), sort_order = VALUES(sort_order), updated_at = CURRENT_TIMESTAMP'
+        );
+        foreach ($this->defaultCategories() as $index => $category) {
+            $seed->execute([
+                'slug' => $category['slug'],
+                'title' => $category['title'],
+                'groupName' => $category['group'],
+                'sortOrder' => $index + 1,
+            ]);
+        }
+    }
+
+    public function status(): array
+    {
+        $tables = [
+            'listing_categories',
+            'listing_places',
+            'listings',
+            'listing_category_map',
+            'listing_occurrences',
+            'listing_prices',
+            'listing_benefits',
+        ];
+        $missing = [];
+        foreach ($tables as $table) {
+            if (!$this->hasTable($table)) {
+                $missing[] = $table;
+            }
+        }
+
+        return [
+            'complete' => $missing === [],
+            'missing' => $missing,
+            'tables' => $tables,
+        ];
+    }
+
+    private function hasTable(string $table): bool
+    {
+        if (array_key_exists($table, $this->tableCache)) {
+            return $this->tableCache[$table];
+        }
+
+        try {
+            $stmt = $this->pdo->prepare('SELECT 1 FROM information_schema.tables WHERE table_schema = DATABASE() AND table_name = :table LIMIT 1');
+            $stmt->execute(['table' => $table]);
+            return $this->tableCache[$table] = (bool)$stmt->fetchColumn();
+        } catch (\Throwable) {
+            return $this->tableCache[$table] = false;
+        }
+    }
+
+    private function defaultCategories(): array
+    {
+        return [
+            ['slug' => 'spielplatz', 'title' => 'Spielplatz', 'group' => 'place'],
+            ['slug' => 'cafe', 'title' => 'Café', 'group' => 'food'],
+            ['slug' => 'restaurant', 'title' => 'Restaurant', 'group' => 'food'],
+            ['slug' => 'indoor-spielort', 'title' => 'Indoor-Spielort', 'group' => 'place'],
+            ['slug' => 'zirkus', 'title' => 'Zirkus', 'group' => 'event'],
+            ['slug' => 'huepfburgen', 'title' => 'Hüpfburgen', 'group' => 'event'],
+            ['slug' => 'workshop', 'title' => 'Workshop', 'group' => 'event'],
+            ['slug' => 'kurs', 'title' => 'Kurs', 'group' => 'event'],
+            ['slug' => 'familienfest', 'title' => 'Familienfest', 'group' => 'family'],
+        ];
+    }
+}

src/App/SystemSettings.php

@@ -0,0 +1,107 @@
+<?php
+declare(strict_types=1);
+
+namespace App;
+
+final class SystemSettings
+{
+    private array $tableCache = [];
+
+    private const DEFAULTS = [
+        'google_places_enabled' => '0',
+        'forum_maintenance_mode' => '0',
+        'site_maintenance_mode' => '0',
+        'site_maintenance_message' => 'Papa-Kind-Treff ist gerade kurz in Wartung. Bitte versuche es in Kürze erneut.',
+        'place_data_provider' => 'osm',
+    ];
+
+    public function __construct(private \PDO $pdo)
+    {
+    }
+
+    public function ensureSchema(): void
+    {
+        $this->pdo->exec(
+            'CREATE TABLE IF NOT EXISTS system_settings (
+                `key` VARCHAR(120) NOT NULL PRIMARY KEY,
+                `value` TEXT NULL,
+                updated_by BIGINT UNSIGNED NULL,
+                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+                CONSTRAINT fk_system_settings_updated_by FOREIGN KEY (updated_by) REFERENCES users(id) ON DELETE SET NULL
+            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci'
+        );
+
+        $stmt = $this->pdo->prepare(
+            'INSERT INTO system_settings (`key`, `value`, updated_by)
+             VALUES (:key, :value, NULL)
+             ON DUPLICATE KEY UPDATE `value` = `value`'
+        );
+        foreach (self::DEFAULTS as $key => $value) {
+            $stmt->execute([
+                'key' => $key,
+                'value' => $value,
+            ]);
+        }
+    }
+
+    public function getAll(): array
+    {
+        $this->ensureSchema();
+        $settings = self::DEFAULTS;
+        $stmt = $this->pdo->query('SELECT `key`, `value` FROM system_settings');
+        foreach ($stmt->fetchAll(\PDO::FETCH_ASSOC) ?: [] as $row) {
+            $settings[(string)$row['key']] = (string)($row['value'] ?? '');
+        }
+        return $settings;
+    }
+
+    public function get(string $key, ?string $default = null): ?string
+    {
+        $this->ensureSchema();
+        $stmt = $this->pdo->prepare('SELECT `value` FROM system_settings WHERE `key` = :key LIMIT 1');
+        $stmt->execute(['key' => $key]);
+        $value = $stmt->fetchColumn();
+        if ($value === false) {
+            return $default ?? (self::DEFAULTS[$key] ?? null);
+        }
+        return (string)$value;
+    }
+
+    public function getBool(string $key, bool $default = false): bool
+    {
+        $value = $this->get($key, $default ? '1' : '0');
+        return in_array((string)$value, ['1', 'true', 'yes', 'on'], true);
+    }
+
+    public function set(string $key, string $value, ?int $updatedBy = null): void
+    {
+        $this->ensureSchema();
+        $stmt = $this->pdo->prepare(
+            'INSERT INTO system_settings (`key`, `value`, updated_by)
+             VALUES (:key, :value, :updatedBy)
+             ON DUPLICATE KEY UPDATE `value` = VALUES(`value`), updated_by = VALUES(updated_by), updated_at = CURRENT_TIMESTAMP'
+        );
+        $stmt->execute([
+            'key' => $key,
+            'value' => $value,
+            'updatedBy' => $updatedBy,
+        ]);
+    }
+
+    public function updateMany(array $values, ?int $updatedBy = null): void
+    {
+        $this->ensureSchema();
+        $stmt = $this->pdo->prepare(
+            'INSERT INTO system_settings (`key`, `value`, updated_by)
+             VALUES (:key, :value, :updatedBy)
+             ON DUPLICATE KEY UPDATE `value` = VALUES(`value`), updated_by = VALUES(updated_by), updated_at = CURRENT_TIMESTAMP'
+        );
+        foreach ($values as $key => $value) {
+            $stmt->execute([
+                'key' => (string)$key,
+                'value' => (string)$value,
+                'updatedBy' => $updatedBy,
+            ]);
+        }
+    }
+}