diff --git a/aurora-livecam/.gitignore b/aurora-livecam/.gitignore
new file mode 100644
index 0000000..28d83e0
--- /dev/null
+++ b/aurora-livecam/.gitignore
@@ -0,0 +1,26 @@
+# Configuration (contains secrets)
+config.php
+
+# Cache files
+weather_cache.json
+active_viewers.json
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+logs/
+
+# Vendor (if using composer)
+# vendor/
+
+# Uploads (user content)
+uploads/
diff --git a/aurora-livecam/SettingsManager.php b/aurora-livecam/SettingsManager.php
index 3dc0415..bb3336d 100644
--- a/aurora-livecam/SettingsManager.php
+++ b/aurora-livecam/SettingsManager.php
@@ -83,6 +83,38 @@ class SettingsManager {
                 'update_interval' => 5, // Minuten
                 'units' => 'metric' // metric (Celsius) oder imperial (Fahrenheit)
             ],
+            // SaaS Features - alle aktivierbar/deaktivierbar
+            'saas_features' => [
+                // Multi-Tenant
+                'multi_tenant_enabled' => false, // Aktiviert DB-basierte Tenant-Verwaltung
+                'customer_management_enabled' => false,
+
+                // Onboarding
+                'self_registration_enabled' => false,
+                'email_verification_required' => true,
+                'trial_enabled' => true,
+                'trial_days' => 14,
+
+                // Billing
+                'billing_enabled' => false,
+                'stripe_enabled' => false,
+                'free_plan_available' => true,
+
+                // Dashboard
+                'tenant_dashboard_enabled' => false,
+                'analytics_enabled' => false,
+                'custom_domain_enabled' => false,
+                'custom_branding_enabled' => false,
+
+                // Landing
+                'landing_page_enabled' => false,
+                'demo_mode_enabled' => false,
+
+                // Limits (Default für Free-Plan)
+                'default_max_viewers' => 50,
+                'default_storage_mb' => 500,
+                'default_retention_days' => 7
+            ],
             'last_updated' => null,
             'updated_by' => null
         ];
@@ -277,4 +309,49 @@ class SettingsManager {
     public function getWeatherUnits() {
         return $this->get('weather.units') ?? 'metric';
     }
+
+    // SaaS Feature Helper
+    public function isMultiTenantEnabled() {
+        return $this->get('saas_features.multi_tenant_enabled') === true;
+    }
+
+    public function isSelfRegistrationEnabled() {
+        return $this->get('saas_features.self_registration_enabled') === true;
+    }
+
+    public function isBillingEnabled() {
+        return $this->get('saas_features.billing_enabled') === true;
+    }
+
+    public function isStripeEnabled() {
+        return $this->get('saas_features.stripe_enabled') === true;
+    }
+
+    public function isTenantDashboardEnabled() {
+        return $this->get('saas_features.tenant_dashboard_enabled') === true;
+    }
+
+    public function isAnalyticsEnabled() {
+        return $this->get('saas_features.analytics_enabled') === true;
+    }
+
+    public function isCustomDomainEnabled() {
+        return $this->get('saas_features.custom_domain_enabled') === true;
+    }
+
+    public function isCustomBrandingEnabled() {
+        return $this->get('saas_features.custom_branding_enabled') === true;
+    }
+
+    public function isLandingPageEnabled() {
+        return $this->get('saas_features.landing_page_enabled') === true;
+    }
+
+    public function getTrialDays() {
+        return $this->get('saas_features.trial_days') ?? 14;
+    }
+
+    public function getDefaultMaxViewers() {
+        return $this->get('saas_features.default_max_viewers') ?? 50;
+    }
 }
diff --git a/aurora-livecam/config.example.php b/aurora-livecam/config.example.php
new file mode 100644
index 0000000..e7e8bb8
--- /dev/null
+++ b/aurora-livecam/config.example.php
@@ -0,0 +1,59 @@
+<?php
+/**
+ * Aurora Livecam - Konfigurationsdatei
+ *
+ * Kopiere diese Datei zu config.php und passe die Werte an.
+ * WICHTIG: config.php niemals in Git committen!
+ */
+
+return [
+    // Datenbank-Konfiguration
+    'database' => [
+        'host' => 'localhost',
+        'port' => 3306,
+        'database' => 'aurora_livecam',
+        'username' => 'root',
+        'password' => '',
+        'charset' => 'utf8mb4',
+    ],
+
+    // Anwendungs-Einstellungen
+    'app' => [
+        'name' => 'Aurora Livecam',
+        'url' => 'https://aurora-weather-livecam.com',
+        'debug' => false,
+        'timezone' => 'Europe/Zurich',
+    ],
+
+    // Multi-Tenant Einstellungen
+    'tenant' => [
+        'default_subdomain_suffix' => '.aurora-livecam.com',
+        'allow_custom_domains' => true,
+        'trial_days' => 14,
+    ],
+
+    // Stripe (für Billing)
+    'stripe' => [
+        'public_key' => '',
+        'secret_key' => '',
+        'webhook_secret' => '',
+        'currency' => 'chf',
+    ],
+
+    // E-Mail Einstellungen (für Onboarding)
+    'mail' => [
+        'host' => 'smtp.example.com',
+        'port' => 587,
+        'username' => '',
+        'password' => '',
+        'from_address' => 'noreply@aurora-livecam.com',
+        'from_name' => 'Aurora Livecam',
+    ],
+
+    // Sicherheit
+    'security' => [
+        'session_lifetime' => 7200, // 2 Stunden
+        'remember_me_days' => 30,
+        'password_min_length' => 8,
+    ],
+];
diff --git a/aurora-livecam/database/schema.sql b/aurora-livecam/database/schema.sql
new file mode 100644
index 0000000..a5a8c8e
--- /dev/null
+++ b/aurora-livecam/database/schema.sql
@@ -0,0 +1,205 @@
+-- Aurora Livecam - Multi-Tenant SaaS Schema
+-- Version: 1.0.0
+
+SET NAMES utf8mb4;
+SET FOREIGN_KEY_CHECKS = 0;
+
+-- --------------------------------------------------------
+-- Subscription Plans
+-- --------------------------------------------------------
+CREATE TABLE IF NOT EXISTS `plans` (
+    `id` INT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
+    `name` VARCHAR(100) NOT NULL,
+    `slug` VARCHAR(50) UNIQUE NOT NULL,
+    `stripe_price_id` VARCHAR(100) NULL,
+    `price_monthly` DECIMAL(10,2) DEFAULT 0.00,
+    `price_yearly` DECIMAL(10,2) DEFAULT 0.00,
+    `features` JSON NULL COMMENT '{"max_viewers": 100, "storage_gb": 5, "custom_domain": true}',
+    `is_active` TINYINT(1) DEFAULT 1,
+    `sort_order` INT DEFAULT 0,
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+-- Default Plans
+INSERT INTO `plans` (`name`, `slug`, `price_monthly`, `price_yearly`, `features`, `sort_order`) VALUES
+('Free', 'free', 0.00, 0.00, '{"max_viewers": 10, "storage_gb": 0.5, "custom_domain": false, "weather_widget": true, "timelapse": false, "analytics": false, "branding": false}', 1),
+('Basic', 'basic', 19.00, 190.00, '{"max_viewers": 50, "storage_gb": 5, "custom_domain": false, "weather_widget": true, "timelapse": true, "analytics": true, "branding": false}', 2),
+('Professional', 'professional', 49.00, 490.00, '{"max_viewers": 200, "storage_gb": 20, "custom_domain": true, "weather_widget": true, "timelapse": true, "analytics": true, "branding": true}', 3),
+('Enterprise', 'enterprise', 149.00, 1490.00, '{"max_viewers": -1, "storage_gb": 100, "custom_domain": true, "weather_widget": true, "timelapse": true, "analytics": true, "branding": true, "priority_support": true}', 4);
+
+-- --------------------------------------------------------
+-- Tenants (Customers)
+-- --------------------------------------------------------
+CREATE TABLE IF NOT EXISTS `tenants` (
+    `id` INT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
+    `uuid` VARCHAR(36) UNIQUE NOT NULL,
+    `name` VARCHAR(255) NOT NULL,
+    `slug` VARCHAR(100) UNIQUE NOT NULL COMMENT 'URL-safe identifier, e.g. aurora, seecam',
+    `email` VARCHAR(255) NOT NULL,
+    `status` ENUM('trial', 'active', 'suspended', 'cancelled') DEFAULT 'trial',
+    `plan_id` INT UNSIGNED NULL,
+    `trial_ends_at` TIMESTAMP NULL,
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    FOREIGN KEY (`plan_id`) REFERENCES `plans`(`id`) ON DELETE SET NULL,
+    INDEX `idx_status` (`status`),
+    INDEX `idx_slug` (`slug`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+-- --------------------------------------------------------
+-- Tenant Domains
+-- --------------------------------------------------------
+CREATE TABLE IF NOT EXISTS `tenant_domains` (
+    `id` INT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
+    `tenant_id` INT UNSIGNED NOT NULL,
+    `domain` VARCHAR(255) UNIQUE NOT NULL,
+    `is_primary` TINYINT(1) DEFAULT 0,
+    `ssl_status` ENUM('pending', 'active', 'failed') DEFAULT 'pending',
+    `verified_at` TIMESTAMP NULL,
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (`tenant_id`) REFERENCES `tenants`(`id`) ON DELETE CASCADE,
+    INDEX `idx_domain` (`domain`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+-- --------------------------------------------------------
+-- Tenant Settings (replaces settings.json per tenant)
+-- --------------------------------------------------------
+CREATE TABLE IF NOT EXISTS `tenant_settings` (
+    `id` INT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
+    `tenant_id` INT UNSIGNED NOT NULL,
+    `setting_key` VARCHAR(255) NOT NULL,
+    `setting_value` TEXT NULL,
+    `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    UNIQUE KEY `uk_tenant_key` (`tenant_id`, `setting_key`),
+    FOREIGN KEY (`tenant_id`) REFERENCES `tenants`(`id`) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+-- --------------------------------------------------------
+-- Tenant Branding
+-- --------------------------------------------------------
+CREATE TABLE IF NOT EXISTS `tenant_branding` (
+    `tenant_id` INT UNSIGNED PRIMARY KEY,
+    `site_name` VARCHAR(255) NULL,
+    `site_name_full` VARCHAR(255) NULL,
+    `tagline` VARCHAR(255) NULL,
+    `logo_path` VARCHAR(500) NULL,
+    `favicon_path` VARCHAR(500) NULL,
+    `primary_color` VARCHAR(7) DEFAULT '#667eea',
+    `secondary_color` VARCHAR(7) DEFAULT '#764ba2',
+    `accent_color` VARCHAR(7) DEFAULT '#f093fb',
+    `welcome_text_de` TEXT NULL,
+    `welcome_text_en` TEXT NULL,
+    `footer_text` TEXT NULL,
+    `custom_css` TEXT NULL,
+    `custom_js` TEXT NULL,
+    `social_facebook` VARCHAR(255) NULL,
+    `social_instagram` VARCHAR(255) NULL,
+    `social_youtube` VARCHAR(255) NULL,
+    `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    FOREIGN KEY (`tenant_id`) REFERENCES `tenants`(`id`) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+-- --------------------------------------------------------
+-- Tenant Streams
+-- --------------------------------------------------------
+CREATE TABLE IF NOT EXISTS `tenant_streams` (
+    `id` INT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
+    `tenant_id` INT UNSIGNED NOT NULL,
+    `name` VARCHAR(255) DEFAULT 'Main Stream',
+    `stream_url` VARCHAR(500) NOT NULL,
+    `stream_type` ENUM('hls', 'rtmp', 'webrtc', 'iframe') DEFAULT 'hls',
+    `is_active` TINYINT(1) DEFAULT 1,
+    `is_primary` TINYINT(1) DEFAULT 1,
+    `last_check_at` TIMESTAMP NULL,
+    `last_status` ENUM('online', 'offline', 'error') NULL,
+    `error_message` VARCHAR(500) NULL,
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (`tenant_id`) REFERENCES `tenants`(`id`) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+-- --------------------------------------------------------
+-- Users
+-- --------------------------------------------------------
+CREATE TABLE IF NOT EXISTS `users` (
+    `id` INT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
+    `tenant_id` INT UNSIGNED NULL COMMENT 'NULL = Super Admin',
+    `email` VARCHAR(255) UNIQUE NOT NULL,
+    `password_hash` VARCHAR(255) NOT NULL,
+    `name` VARCHAR(255) NULL,
+    `role` ENUM('super_admin', 'tenant_admin', 'tenant_user') NOT NULL DEFAULT 'tenant_user',
+    `email_verified_at` TIMESTAMP NULL,
+    `last_login_at` TIMESTAMP NULL,
+    `remember_token` VARCHAR(100) NULL,
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    FOREIGN KEY (`tenant_id`) REFERENCES `tenants`(`id`) ON DELETE CASCADE,
+    INDEX `idx_email` (`email`),
+    INDEX `idx_tenant` (`tenant_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+-- --------------------------------------------------------
+-- Subscriptions
+-- --------------------------------------------------------
+CREATE TABLE IF NOT EXISTS `subscriptions` (
+    `id` INT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
+    `tenant_id` INT UNSIGNED NOT NULL,
+    `plan_id` INT UNSIGNED NOT NULL,
+    `stripe_subscription_id` VARCHAR(100) NULL,
+    `stripe_customer_id` VARCHAR(100) NULL,
+    `status` ENUM('trialing', 'active', 'past_due', 'canceled', 'unpaid', 'incomplete') DEFAULT 'trialing',
+    `current_period_start` TIMESTAMP NULL,
+    `current_period_end` TIMESTAMP NULL,
+    `canceled_at` TIMESTAMP NULL,
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    FOREIGN KEY (`tenant_id`) REFERENCES `tenants`(`id`) ON DELETE CASCADE,
+    FOREIGN KEY (`plan_id`) REFERENCES `plans`(`id`),
+    INDEX `idx_tenant` (`tenant_id`),
+    INDEX `idx_stripe_sub` (`stripe_subscription_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+-- --------------------------------------------------------
+-- Invoices (Stripe cache)
+-- --------------------------------------------------------
+CREATE TABLE IF NOT EXISTS `invoices` (
+    `id` INT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
+    `tenant_id` INT UNSIGNED NOT NULL,
+    `stripe_invoice_id` VARCHAR(100) UNIQUE NULL,
+    `amount` DECIMAL(10,2) NOT NULL,
+    `currency` VARCHAR(3) DEFAULT 'CHF',
+    `status` VARCHAR(50) NULL,
+    `paid_at` TIMESTAMP NULL,
+    `invoice_pdf_url` VARCHAR(500) NULL,
+    `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (`tenant_id`) REFERENCES `tenants`(`id`) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+-- --------------------------------------------------------
+-- Viewer Statistics
+-- --------------------------------------------------------
+CREATE TABLE IF NOT EXISTS `viewer_stats` (
+    `id` BIGINT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
+    `tenant_id` INT UNSIGNED NOT NULL,
+    `recorded_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    `viewer_count` INT DEFAULT 0,
+    `unique_sessions` INT DEFAULT 0,
+    FOREIGN KEY (`tenant_id`) REFERENCES `tenants`(`id`) ON DELETE CASCADE,
+    INDEX `idx_tenant_time` (`tenant_id`, `recorded_at`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+-- --------------------------------------------------------
+-- Onboarding Progress
+-- --------------------------------------------------------
+CREATE TABLE IF NOT EXISTS `tenant_onboarding` (
+    `tenant_id` INT UNSIGNED PRIMARY KEY,
+    `current_step` INT DEFAULT 1,
+    `stream_verified` TINYINT(1) DEFAULT 0,
+    `branding_configured` TINYINT(1) DEFAULT 0,
+    `payment_configured` TINYINT(1) DEFAULT 0,
+    `completed_at` TIMESTAMP NULL,
+    `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    FOREIGN KEY (`tenant_id`) REFERENCES `tenants`(`id`) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+SET FOREIGN_KEY_CHECKS = 1;
diff --git a/aurora-livecam/index.php b/aurora-livecam/index.php
index bdde27c..9b0c44f 100644
--- a/aurora-livecam/index.php
+++ b/aurora-livecam/index.php
@@ -6,6 +6,11 @@ require __DIR__ . '/vendor/autoload.php';
 require_once 'SettingsManager.php';
 require_once 'WeatherManager.php';
 
+// Multi-Tenant Bootstrap laden (falls vorhanden)
+if (file_exists(__DIR__ . '/src/bootstrap.php')) {
+    require_once __DIR__ . '/src/bootstrap.php';
+}
+
 // SettingsManager initialisieren
 $settingsManager = new SettingsManager();
 
@@ -60,70 +65,104 @@ function safeRedirect($url) {
     exit();
 }
 
-// Hauptlogik
+// Hauptlogik - Domain Redirects werden jetzt in bootstrap.php behandelt
+// (Legacy-Redirect bleibt als Fallback falls Bootstrap nicht geladen)
 $oldDomains = [
     'www.aurora-wetter-lifecam.ch',
     'www.aurora-wetter-livecam.ch'
 ];
 $newDomain = 'www.aurora-weather-livecam.com';
 
-if (in_array($_SERVER['HTTP_HOST'], $oldDomains)) {
+if (in_array($_SERVER['HTTP_HOST'] ?? '', $oldDomains)) {
     $protocol = isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? 'https' : 'http';
     $newUrl = $protocol . '://' . $newDomain . $_SERVER['REQUEST_URI'];
-
-    // Logging für Debugging
-    error_log("Umleitung von {$_SERVER['HTTP_HOST']} nach $newUrl");
-
     if (!headers_sent()) {
         header("HTTP/1.1 301 Moved Permanently");
         header("Location: " . $newUrl);
-    } else {
-        echo '<script>window.location.href="' . $newUrl . '";</script>';
+        exit();
     }
-    exit();
 }
 
-// Site-Konfiguration basierend auf Domain
-$isSeecam = ($_SERVER['HTTP_HOST'] === 'www.seecam.ch' || $_SERVER['HTTP_HOST'] === 'seecam.ch');
+// Site-Konfiguration: Nutze Multi-Tenant System falls verfügbar, sonst Legacy
+if (function_exists('getSiteConfig')) {
+    // Multi-Tenant Modus (aus bootstrap.php)
+    $tenantConfig = getSiteConfig();
+    $isSeecam = ($tenantConfig['tenant_slug'] === 'seecam');
 
-if ($isSeecam) {
     $siteConfig = [
-        'domain' => 'www.seecam.ch',
-        'domainUrl' => 'https://www.seecam.ch',
-        'logo' => 'seecam.jpg',
-        'siteName' => 'Seecam',
-        'siteNameFull' => 'Seecam Wetter Livecam',
-        'siteNameFullEn' => 'Seecam Weather Livecam',
-        'siteTitle' => 'Zürich Oberland Webcam Live - Zürichsee & Patrouille Suisse | Seecam 24/7',
-        'author' => 'Seecam Wetter Livecam',
-        'alternateName' => 'Seecam Webcam Schweiz',
-        'welcomeDe' => 'Willkommen bei Seecam Wetter Livecam',
-        'welcomeEn' => 'Welcome to Seecam Weather Livecam',
-        'aboutDe' => 'Seecam Wetter Livecam ist ein Herzensprojekt von Wetterbegeisterten. Wir möchten Ihnen die Schönheit der Natur und Faszination des Wetters näher bringen.',
-        'aboutEn' => 'Seecam Weather Livecam is a passion project...',
-        'blogTitle' => 'Seecam Wetter Blog',
-        'footerName' => 'Seecam Wetter Livecam',
-        'copyright' => '© 2024 Seecam Wetter Livecam - Webcam Zürich Oberland'
+        'domain' => $_SERVER['HTTP_HOST'] ?? 'localhost',
+        'domainUrl' => (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? 'https' : 'http') . '://' . ($_SERVER['HTTP_HOST'] ?? 'localhost'),
+        'logo' => $tenantConfig['logo_path'] ?? ($isSeecam ? 'seecam.jpg' : 'logo.png'),
+        'siteName' => $tenantConfig['site_name'],
+        'siteNameFull' => $tenantConfig['site_name_full'],
+        'siteNameFullEn' => $tenantConfig['site_name_full'],
+        'siteTitle' => $tenantConfig['site_name_full'] . ' - Live Webcam',
+        'author' => $tenantConfig['site_name_full'],
+        'alternateName' => $tenantConfig['site_name'] . ' Webcam Schweiz',
+        'welcomeDe' => $tenantConfig['welcome_de'] ?: ('Willkommen bei ' . $tenantConfig['site_name_full']),
+        'welcomeEn' => $tenantConfig['welcome_en'] ?: ('Welcome to ' . $tenantConfig['site_name_full']),
+        'aboutDe' => $tenantConfig['site_name_full'] . ' ist ein Herzensprojekt von Wetterbegeisterten.',
+        'aboutEn' => $tenantConfig['site_name_full'] . ' is a passion project by weather enthusiasts.',
+        'blogTitle' => $tenantConfig['site_name'] . ' Wetter Blog',
+        'footerName' => $tenantConfig['site_name_full'],
+        'copyright' => '© ' . date('Y') . ' ' . $tenantConfig['site_name_full'],
+        // Zusätzliche Multi-Tenant Felder
+        'tenant_id' => $tenantConfig['tenant_id'] ?? 0,
+        'primary_color' => $tenantConfig['primary_color'] ?? '#667eea',
+        'secondary_color' => $tenantConfig['secondary_color'] ?? '#764ba2',
+        'custom_css' => $tenantConfig['custom_css'] ?? '',
     ];
 } else {
-    $siteConfig = [
-        'domain' => 'www.aurora-weather-livecam.com',
-        'domainUrl' => 'https://www.aurora-weather-livecam.com',
-        'logo' => 'logo.png',
-        'siteName' => 'Aurora',
-        'siteNameFull' => 'Aurora Wetter Livecam',
-        'siteNameFullEn' => 'Aurora Weather Livecam',
-        'siteTitle' => 'Zürich Oberland Webcam Live - Zürichsee & Patrouille Suisse | Aurora Livecam 24/7',
-        'author' => 'Aurora Wetter Livecam',
-        'alternateName' => 'Aurora Webcam Schweiz',
-        'welcomeDe' => 'Willkommen bei Aurora Wetter Livecam',
-        'welcomeEn' => 'Welcome to Aurora Weather Livecam',
-        'aboutDe' => 'Aurora Wetter Livecam ist ein Herzensprojekt von Wetterbegeisterten. Wir möchten Ihnen die Schönheit der Natur und Faszination des Wetters näher bringen.',
-        'aboutEn' => 'Aurora Weather Livecam is a passion project...',
-        'blogTitle' => 'Aurora Wetter Blog',
-        'footerName' => 'Aurora Wetter Livecam',
-        'copyright' => '© 2024 Aurora Wetter Lifecam - Webcam Zürich Oberland'
-    ];
+    // Legacy-Modus (hardcoded)
+    $isSeecam = ($_SERVER['HTTP_HOST'] === 'www.seecam.ch' || $_SERVER['HTTP_HOST'] === 'seecam.ch');
+
+    if ($isSeecam) {
+        $siteConfig = [
+            'domain' => 'www.seecam.ch',
+            'domainUrl' => 'https://www.seecam.ch',
+            'logo' => 'seecam.jpg',
+            'siteName' => 'Seecam',
+            'siteNameFull' => 'Seecam Wetter Livecam',
+            'siteNameFullEn' => 'Seecam Weather Livecam',
+            'siteTitle' => 'Zürich Oberland Webcam Live - Zürichsee & Patrouille Suisse | Seecam 24/7',
+            'author' => 'Seecam Wetter Livecam',
+            'alternateName' => 'Seecam Webcam Schweiz',
+            'welcomeDe' => 'Willkommen bei Seecam Wetter Livecam',
+            'welcomeEn' => 'Welcome to Seecam Weather Livecam',
+            'aboutDe' => 'Seecam Wetter Livecam ist ein Herzensprojekt von Wetterbegeisterten.',
+            'aboutEn' => 'Seecam Weather Livecam is a passion project.',
+            'blogTitle' => 'Seecam Wetter Blog',
+            'footerName' => 'Seecam Wetter Livecam',
+            'copyright' => '© 2024 Seecam Wetter Livecam - Webcam Zürich Oberland',
+            'tenant_id' => 0,
+            'primary_color' => '#667eea',
+            'secondary_color' => '#764ba2',
+            'custom_css' => '',
+        ];
+    } else {
+        $siteConfig = [
+            'domain' => 'www.aurora-weather-livecam.com',
+            'domainUrl' => 'https://www.aurora-weather-livecam.com',
+            'logo' => 'logo.png',
+            'siteName' => 'Aurora',
+            'siteNameFull' => 'Aurora Wetter Livecam',
+            'siteNameFullEn' => 'Aurora Weather Livecam',
+            'siteTitle' => 'Zürich Oberland Webcam Live - Zürichsee & Patrouille Suisse | Aurora Livecam 24/7',
+            'author' => 'Aurora Wetter Livecam',
+            'alternateName' => 'Aurora Webcam Schweiz',
+            'welcomeDe' => 'Willkommen bei Aurora Wetter Livecam',
+            'welcomeEn' => 'Welcome to Aurora Weather Livecam',
+            'aboutDe' => 'Aurora Wetter Livecam ist ein Herzensprojekt von Wetterbegeisterten.',
+            'aboutEn' => 'Aurora Weather Livecam is a passion project.',
+            'blogTitle' => 'Aurora Wetter Blog',
+            'footerName' => 'Aurora Wetter Livecam',
+            'copyright' => '© 2024 Aurora Wetter Lifecam - Webcam Zürich Oberland',
+            'tenant_id' => 0,
+            'primary_color' => '#667eea',
+            'secondary_color' => '#764ba2',
+            'custom_css' => '',
+        ];
+    }
 }
 
 
diff --git a/aurora-livecam/src/Core/Database.php b/aurora-livecam/src/Core/Database.php
new file mode 100644
index 0000000..6f35d22
--- /dev/null
+++ b/aurora-livecam/src/Core/Database.php
@@ -0,0 +1,215 @@
+<?php
+/**
+ * Database - PDO Wrapper mit Singleton Pattern
+ *
+ * Verwendung:
+ *   $db = Database::getInstance();
+ *   $users = $db->fetchAll("SELECT * FROM users WHERE tenant_id = ?", [$tenantId]);
+ */
+
+namespace AuroraLivecam\Core;
+
+use PDO;
+use PDOException;
+use Exception;
+
+class Database
+{
+    private static ?Database $instance = null;
+    private ?PDO $pdo = null;
+    private array $config;
+
+    private function __construct()
+    {
+        $this->config = $this->loadConfig();
+    }
+
+    /**
+     * Singleton: Gibt die einzige Instanz zurück
+     */
+    public static function getInstance(): Database
+    {
+        if (self::$instance === null) {
+            self::$instance = new self();
+        }
+        return self::$instance;
+    }
+
+    /**
+     * Lädt die Datenbank-Konfiguration
+     */
+    private function loadConfig(): array
+    {
+        // Versuche .env oder config.php zu laden
+        $configFile = dirname(__DIR__, 2) . '/config.php';
+
+        if (file_exists($configFile)) {
+            $config = require $configFile;
+            return $config['database'] ?? [];
+        }
+
+        // Fallback auf Umgebungsvariablen
+        return [
+            'host' => getenv('DB_HOST') ?: 'localhost',
+            'port' => getenv('DB_PORT') ?: 3306,
+            'database' => getenv('DB_DATABASE') ?: 'aurora_livecam',
+            'username' => getenv('DB_USERNAME') ?: 'root',
+            'password' => getenv('DB_PASSWORD') ?: '',
+            'charset' => 'utf8mb4',
+        ];
+    }
+
+    /**
+     * Stellt die Datenbankverbindung her (Lazy Loading)
+     */
+    public function connect(): PDO
+    {
+        if ($this->pdo !== null) {
+            return $this->pdo;
+        }
+
+        $dsn = sprintf(
+            'mysql:host=%s;port=%d;dbname=%s;charset=%s',
+            $this->config['host'],
+            $this->config['port'],
+            $this->config['database'],
+            $this->config['charset']
+        );
+
+        try {
+            $this->pdo = new PDO($dsn, $this->config['username'], $this->config['password'], [
+                PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
+                PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+                PDO::ATTR_EMULATE_PREPARES => false,
+                PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8mb4 COLLATE utf8mb4_unicode_ci"
+            ]);
+        } catch (PDOException $e) {
+            throw new Exception('Database connection failed: ' . $e->getMessage());
+        }
+
+        return $this->pdo;
+    }
+
+    /**
+     * Führt eine Query aus und gibt alle Ergebnisse zurück
+     */
+    public function fetchAll(string $sql, array $params = []): array
+    {
+        $stmt = $this->connect()->prepare($sql);
+        $stmt->execute($params);
+        return $stmt->fetchAll();
+    }
+
+    /**
+     * Führt eine Query aus und gibt eine Zeile zurück
+     */
+    public function fetchOne(string $sql, array $params = []): ?array
+    {
+        $stmt = $this->connect()->prepare($sql);
+        $stmt->execute($params);
+        $result = $stmt->fetch();
+        return $result ?: null;
+    }
+
+    /**
+     * Führt eine Query aus und gibt einen einzelnen Wert zurück
+     */
+    public function fetchColumn(string $sql, array $params = [], int $column = 0): mixed
+    {
+        $stmt = $this->connect()->prepare($sql);
+        $stmt->execute($params);
+        return $stmt->fetchColumn($column);
+    }
+
+    /**
+     * Führt INSERT/UPDATE/DELETE aus und gibt die Anzahl betroffener Zeilen zurück
+     */
+    public function execute(string $sql, array $params = []): int
+    {
+        $stmt = $this->connect()->prepare($sql);
+        $stmt->execute($params);
+        return $stmt->rowCount();
+    }
+
+    /**
+     * INSERT und gibt die neue ID zurück
+     */
+    public function insert(string $table, array $data): int
+    {
+        $columns = implode(', ', array_map(fn($col) => "`$col`", array_keys($data)));
+        $placeholders = implode(', ', array_fill(0, count($data), '?'));
+
+        $sql = "INSERT INTO `$table` ($columns) VALUES ($placeholders)";
+        $this->execute($sql, array_values($data));
+
+        return (int) $this->connect()->lastInsertId();
+    }
+
+    /**
+     * UPDATE mit WHERE-Bedingung
+     */
+    public function update(string $table, array $data, string $where, array $whereParams = []): int
+    {
+        $set = implode(', ', array_map(fn($col) => "`$col` = ?", array_keys($data)));
+        $sql = "UPDATE `$table` SET $set WHERE $where";
+
+        return $this->execute($sql, [...array_values($data), ...$whereParams]);
+    }
+
+    /**
+     * DELETE mit WHERE-Bedingung
+     */
+    public function delete(string $table, string $where, array $params = []): int
+    {
+        return $this->execute("DELETE FROM `$table` WHERE $where", $params);
+    }
+
+    /**
+     * Startet eine Transaktion
+     */
+    public function beginTransaction(): bool
+    {
+        return $this->connect()->beginTransaction();
+    }
+
+    /**
+     * Bestätigt eine Transaktion
+     */
+    public function commit(): bool
+    {
+        return $this->connect()->commit();
+    }
+
+    /**
+     * Macht eine Transaktion rückgängig
+     */
+    public function rollback(): bool
+    {
+        return $this->connect()->rollBack();
+    }
+
+    /**
+     * Prüft ob eine Datenbankverbindung besteht
+     */
+    public function isConnected(): bool
+    {
+        return $this->pdo !== null;
+    }
+
+    /**
+     * Gibt die PDO-Instanz direkt zurück (für komplexe Queries)
+     */
+    public function getPdo(): PDO
+    {
+        return $this->connect();
+    }
+
+    // Prevent cloning
+    private function __clone() {}
+
+    // Prevent unserialization
+    public function __wakeup()
+    {
+        throw new Exception("Cannot unserialize singleton");
+    }
+}
diff --git a/aurora-livecam/src/Core/TenantResolver.php b/aurora-livecam/src/Core/TenantResolver.php
new file mode 100644
index 0000000..e0f8659
--- /dev/null
+++ b/aurora-livecam/src/Core/TenantResolver.php
@@ -0,0 +1,316 @@
+<?php
+/**
+ * TenantResolver - Ermittelt den aktuellen Tenant basierend auf Domain
+ *
+ * Ersetzt den hardcoded Domain-Switch in index.php
+ */
+
+namespace AuroraLivecam\Core;
+
+class TenantResolver
+{
+    private Database $db;
+    private ?array $currentTenant = null;
+    private ?array $currentBranding = null;
+    private static ?TenantResolver $instance = null;
+
+    // Cache für Domain-Lookups (vermeidet DB-Anfragen bei jedem Request)
+    private static array $domainCache = [];
+
+    public function __construct(?Database $db = null)
+    {
+        $this->db = $db ?? Database::getInstance();
+    }
+
+    /**
+     * Singleton für globalen Zugriff
+     */
+    public static function getInstance(): TenantResolver
+    {
+        if (self::$instance === null) {
+            self::$instance = new self();
+        }
+        return self::$instance;
+    }
+
+    /**
+     * Löst die aktuelle Domain auf und gibt den Tenant zurück
+     */
+    public function resolve(?string $domain = null): ?array
+    {
+        $domain = $domain ?? $this->getCurrentDomain();
+
+        if ($this->currentTenant !== null && ($this->currentTenant['domain'] ?? '') === $domain) {
+            return $this->currentTenant;
+        }
+
+        // Cache prüfen
+        if (isset(self::$domainCache[$domain])) {
+            $this->currentTenant = self::$domainCache[$domain];
+            return $this->currentTenant;
+        }
+
+        // Aus DB laden
+        $this->currentTenant = $this->loadTenantByDomain($domain);
+
+        // In Cache speichern
+        self::$domainCache[$domain] = $this->currentTenant;
+
+        return $this->currentTenant;
+    }
+
+    /**
+     * Lädt einen Tenant anhand der Domain aus der Datenbank
+     */
+    private function loadTenantByDomain(string $domain): ?array
+    {
+        // Normalisiere Domain (ohne www.)
+        $normalizedDomain = $this->normalizeDomain($domain);
+
+        try {
+            $sql = "
+                SELECT
+                    t.*,
+                    td.domain,
+                    td.is_primary,
+                    p.name as plan_name,
+                    p.slug as plan_slug,
+                    p.features as plan_features
+                FROM tenant_domains td
+                JOIN tenants t ON td.tenant_id = t.id
+                LEFT JOIN plans p ON t.plan_id = p.id
+                WHERE td.domain = ? OR td.domain = ?
+                LIMIT 1
+            ";
+
+            $tenant = $this->db->fetchOne($sql, [$domain, $normalizedDomain]);
+
+            if ($tenant && isset($tenant['plan_features'])) {
+                $tenant['plan_features'] = json_decode($tenant['plan_features'], true);
+            }
+
+            return $tenant;
+        } catch (\Exception $e) {
+            // Fallback: Keine DB-Verbindung oder Tabelle existiert nicht
+            return $this->getFallbackTenant($domain);
+        }
+    }
+
+    /**
+     * Fallback für Legacy-Modus (ohne Datenbank)
+     * Unterstützt die alten hardcoded Domains
+     */
+    private function getFallbackTenant(string $domain): ?array
+    {
+        $normalizedDomain = $this->normalizeDomain($domain);
+
+        // Alte seecam.ch Konfiguration
+        if (str_contains($normalizedDomain, 'seecam.ch')) {
+            return [
+                'id' => 0,
+                'uuid' => 'legacy-seecam',
+                'name' => 'Seecam',
+                'slug' => 'seecam',
+                'status' => 'active',
+                'domain' => $domain,
+                'is_legacy' => true,
+                'branding' => [
+                    'site_name' => 'Seecam',
+                    'site_name_full' => 'Seecam.ch - Live Webcam',
+                    'tagline' => 'Ihre Live-Webcam',
+                    'primary_color' => '#667eea',
+                    'secondary_color' => '#764ba2',
+                ],
+            ];
+        }
+
+        // Default: Aurora
+        if (str_contains($normalizedDomain, 'aurora') ||
+            str_contains($normalizedDomain, 'localhost') ||
+            $normalizedDomain === '127.0.0.1') {
+            return [
+                'id' => 0,
+                'uuid' => 'legacy-aurora',
+                'name' => 'Aurora Weather Livecam',
+                'slug' => 'aurora',
+                'status' => 'active',
+                'domain' => $domain,
+                'is_legacy' => true,
+                'branding' => [
+                    'site_name' => 'Aurora',
+                    'site_name_full' => 'Aurora Weather Livecam - Zürich Oberland',
+                    'tagline' => 'Wetter Webcam Schweiz',
+                    'primary_color' => '#667eea',
+                    'secondary_color' => '#764ba2',
+                ],
+            ];
+        }
+
+        // Unbekannte Domain - Default Tenant
+        return [
+            'id' => 0,
+            'uuid' => 'default',
+            'name' => 'Livecam',
+            'slug' => 'default',
+            'status' => 'active',
+            'domain' => $domain,
+            'is_legacy' => true,
+            'branding' => [
+                'site_name' => 'Livecam',
+                'site_name_full' => 'Livecam',
+                'primary_color' => '#667eea',
+                'secondary_color' => '#764ba2',
+            ],
+        ];
+    }
+
+    /**
+     * Gibt das Branding des aktuellen Tenants zurück
+     */
+    public function getBranding(): array
+    {
+        if ($this->currentBranding !== null) {
+            return $this->currentBranding;
+        }
+
+        $tenant = $this->resolve();
+
+        if (!$tenant) {
+            return $this->getDefaultBranding();
+        }
+
+        // Legacy-Tenant hat Branding inline
+        if (isset($tenant['is_legacy']) && $tenant['is_legacy']) {
+            $this->currentBranding = $tenant['branding'] ?? $this->getDefaultBranding();
+            return $this->currentBranding;
+        }
+
+        // Aus DB laden
+        try {
+            $branding = $this->db->fetchOne(
+                "SELECT * FROM tenant_branding WHERE tenant_id = ?",
+                [$tenant['id']]
+            );
+
+            $this->currentBranding = $branding ?: $this->getDefaultBranding();
+        } catch (\Exception $e) {
+            $this->currentBranding = $this->getDefaultBranding();
+        }
+
+        return $this->currentBranding;
+    }
+
+    /**
+     * Default Branding
+     */
+    private function getDefaultBranding(): array
+    {
+        return [
+            'site_name' => 'Livecam',
+            'site_name_full' => 'Live Webcam',
+            'tagline' => '',
+            'logo_path' => null,
+            'favicon_path' => null,
+            'primary_color' => '#667eea',
+            'secondary_color' => '#764ba2',
+            'accent_color' => '#f093fb',
+            'welcome_text_de' => '',
+            'welcome_text_en' => '',
+            'footer_text' => '',
+            'custom_css' => '',
+        ];
+    }
+
+    /**
+     * Gibt die aktuelle Domain zurück
+     */
+    public function getCurrentDomain(): string
+    {
+        return $_SERVER['HTTP_HOST'] ?? 'localhost';
+    }
+
+    /**
+     * Normalisiert eine Domain (entfernt www.)
+     */
+    private function normalizeDomain(string $domain): string
+    {
+        return preg_replace('/^www\./i', '', strtolower($domain));
+    }
+
+    /**
+     * Prüft ob der aktuelle Tenant aktiv ist
+     */
+    public function isActive(): bool
+    {
+        $tenant = $this->resolve();
+        return $tenant && in_array($tenant['status'], ['active', 'trial']);
+    }
+
+    /**
+     * Prüft ob der Tenant im Trial ist
+     */
+    public function isTrial(): bool
+    {
+        $tenant = $this->resolve();
+        return $tenant && $tenant['status'] === 'trial';
+    }
+
+    /**
+     * Gibt die Tenant-ID zurück (oder 0 für Legacy)
+     */
+    public function getTenantId(): int
+    {
+        $tenant = $this->resolve();
+        return $tenant['id'] ?? 0;
+    }
+
+    /**
+     * Gibt den Tenant-Slug zurück
+     */
+    public function getTenantSlug(): string
+    {
+        $tenant = $this->resolve();
+        return $tenant['slug'] ?? 'default';
+    }
+
+    /**
+     * Prüft ob Multi-Tenant-Modus aktiv ist (DB vorhanden)
+     */
+    public function isMultiTenantEnabled(): bool
+    {
+        $tenant = $this->resolve();
+        return $tenant && !isset($tenant['is_legacy']);
+    }
+
+    /**
+     * Gibt alle Domains eines Tenants zurück
+     */
+    public function getTenantDomains(int $tenantId): array
+    {
+        try {
+            return $this->db->fetchAll(
+                "SELECT * FROM tenant_domains WHERE tenant_id = ? ORDER BY is_primary DESC",
+                [$tenantId]
+            );
+        } catch (\Exception $e) {
+            return [];
+        }
+    }
+
+    /**
+     * Setzt den aktuellen Tenant manuell (für Tests oder CLI)
+     */
+    public function setTenant(array $tenant): void
+    {
+        $this->currentTenant = $tenant;
+        $this->currentBranding = null;
+    }
+
+    /**
+     * Leert den Cache
+     */
+    public static function clearCache(): void
+    {
+        self::$domainCache = [];
+    }
+}
diff --git a/aurora-livecam/src/Tenant/TenantManager.php b/aurora-livecam/src/Tenant/TenantManager.php
new file mode 100644
index 0000000..c73a93f
--- /dev/null
+++ b/aurora-livecam/src/Tenant/TenantManager.php
@@ -0,0 +1,404 @@
+<?php
+/**
+ * TenantManager - CRUD-Operationen für Tenants
+ */
+
+namespace AuroraLivecam\Tenant;
+
+use AuroraLivecam\Core\Database;
+use Exception;
+
+class TenantManager
+{
+    private Database $db;
+
+    public function __construct(?Database $db = null)
+    {
+        $this->db = $db ?? Database::getInstance();
+    }
+
+    /**
+     * Erstellt einen neuen Tenant
+     */
+    public function create(array $data): int
+    {
+        $this->db->beginTransaction();
+
+        try {
+            // UUID generieren
+            $uuid = $this->generateUuid();
+
+            // Slug generieren falls nicht vorhanden
+            $slug = $data['slug'] ?? $this->generateSlug($data['name']);
+
+            // Tenant erstellen
+            $tenantId = $this->db->insert('tenants', [
+                'uuid' => $uuid,
+                'name' => $data['name'],
+                'slug' => $slug,
+                'email' => $data['email'],
+                'status' => $data['status'] ?? 'trial',
+                'plan_id' => $data['plan_id'] ?? $this->getDefaultPlanId(),
+                'trial_ends_at' => $data['trial_ends_at'] ?? $this->calculateTrialEnd(),
+            ]);
+
+            // Domain hinzufügen
+            if (!empty($data['domain'])) {
+                $this->addDomain($tenantId, $data['domain'], true);
+            }
+
+            // Default-Subdomain erstellen
+            if (!empty($data['subdomain'])) {
+                $subdomain = $data['subdomain'] . '.aurora-livecam.com';
+                $this->addDomain($tenantId, $subdomain, empty($data['domain']));
+            }
+
+            // Branding mit Defaults initialisieren
+            $this->db->insert('tenant_branding', [
+                'tenant_id' => $tenantId,
+                'site_name' => $data['name'],
+                'site_name_full' => $data['name'],
+            ]);
+
+            // Onboarding initialisieren
+            $this->db->insert('tenant_onboarding', [
+                'tenant_id' => $tenantId,
+                'current_step' => 1,
+            ]);
+
+            // Stream hinzufügen falls vorhanden
+            if (!empty($data['stream_url'])) {
+                $this->db->insert('tenant_streams', [
+                    'tenant_id' => $tenantId,
+                    'name' => 'Main Stream',
+                    'stream_url' => $data['stream_url'],
+                    'stream_type' => $data['stream_type'] ?? 'hls',
+                    'is_primary' => 1,
+                ]);
+            }
+
+            $this->db->commit();
+
+            return $tenantId;
+
+        } catch (Exception $e) {
+            $this->db->rollback();
+            throw $e;
+        }
+    }
+
+    /**
+     * Aktualisiert einen Tenant
+     */
+    public function update(int $tenantId, array $data): bool
+    {
+        $allowedFields = ['name', 'email', 'status', 'plan_id'];
+        $updateData = array_intersect_key($data, array_flip($allowedFields));
+
+        if (empty($updateData)) {
+            return false;
+        }
+
+        return $this->db->update('tenants', $updateData, 'id = ?', [$tenantId]) > 0;
+    }
+
+    /**
+     * Löscht einen Tenant (Soft-Delete durch Status-Änderung)
+     */
+    public function delete(int $tenantId): bool
+    {
+        return $this->db->update('tenants', ['status' => 'cancelled'], 'id = ?', [$tenantId]) > 0;
+    }
+
+    /**
+     * Hard-Delete (wirklich löschen - Vorsicht!)
+     */
+    public function hardDelete(int $tenantId): bool
+    {
+        return $this->db->delete('tenants', 'id = ?', [$tenantId]) > 0;
+    }
+
+    /**
+     * Gibt einen Tenant anhand der ID zurück
+     */
+    public function getById(int $id): ?array
+    {
+        return $this->db->fetchOne(
+            "SELECT t.*, p.name as plan_name, p.features as plan_features
+             FROM tenants t
+             LEFT JOIN plans p ON t.plan_id = p.id
+             WHERE t.id = ?",
+            [$id]
+        );
+    }
+
+    /**
+     * Gibt einen Tenant anhand des Slugs zurück
+     */
+    public function getBySlug(string $slug): ?array
+    {
+        return $this->db->fetchOne(
+            "SELECT t.*, p.name as plan_name, p.features as plan_features
+             FROM tenants t
+             LEFT JOIN plans p ON t.plan_id = p.id
+             WHERE t.slug = ?",
+            [$slug]
+        );
+    }
+
+    /**
+     * Gibt einen Tenant anhand der UUID zurück
+     */
+    public function getByUuid(string $uuid): ?array
+    {
+        return $this->db->fetchOne(
+            "SELECT t.*, p.name as plan_name, p.features as plan_features
+             FROM tenants t
+             LEFT JOIN plans p ON t.plan_id = p.id
+             WHERE t.uuid = ?",
+            [$uuid]
+        );
+    }
+
+    /**
+     * Listet alle Tenants auf
+     */
+    public function getAll(array $filters = []): array
+    {
+        $sql = "SELECT t.*, p.name as plan_name, p.features as plan_features
+                FROM tenants t
+                LEFT JOIN plans p ON t.plan_id = p.id
+                WHERE 1=1";
+        $params = [];
+
+        if (!empty($filters['status'])) {
+            $sql .= " AND t.status = ?";
+            $params[] = $filters['status'];
+        }
+
+        if (!empty($filters['search'])) {
+            $sql .= " AND (t.name LIKE ? OR t.email LIKE ?)";
+            $params[] = '%' . $filters['search'] . '%';
+            $params[] = '%' . $filters['search'] . '%';
+        }
+
+        $sql .= " ORDER BY t.created_at DESC";
+
+        if (!empty($filters['limit'])) {
+            $sql .= " LIMIT " . (int)$filters['limit'];
+            if (!empty($filters['offset'])) {
+                $sql .= " OFFSET " . (int)$filters['offset'];
+            }
+        }
+
+        return $this->db->fetchAll($sql, $params);
+    }
+
+    /**
+     * Zählt Tenants
+     */
+    public function count(array $filters = []): int
+    {
+        $sql = "SELECT COUNT(*) FROM tenants WHERE 1=1";
+        $params = [];
+
+        if (!empty($filters['status'])) {
+            $sql .= " AND status = ?";
+            $params[] = $filters['status'];
+        }
+
+        return (int) $this->db->fetchColumn($sql, $params);
+    }
+
+    /**
+     * Fügt eine Domain zu einem Tenant hinzu
+     */
+    public function addDomain(int $tenantId, string $domain, bool $isPrimary = false): int
+    {
+        // Normalisiere Domain
+        $domain = strtolower(trim($domain));
+
+        // Prüfe ob Domain bereits existiert
+        $existing = $this->db->fetchOne(
+            "SELECT id FROM tenant_domains WHERE domain = ?",
+            [$domain]
+        );
+
+        if ($existing) {
+            throw new Exception("Domain '$domain' is already in use");
+        }
+
+        // Wenn primary, setze alle anderen auf non-primary
+        if ($isPrimary) {
+            $this->db->execute(
+                "UPDATE tenant_domains SET is_primary = 0 WHERE tenant_id = ?",
+                [$tenantId]
+            );
+        }
+
+        return $this->db->insert('tenant_domains', [
+            'tenant_id' => $tenantId,
+            'domain' => $domain,
+            'is_primary' => $isPrimary ? 1 : 0,
+        ]);
+    }
+
+    /**
+     * Entfernt eine Domain von einem Tenant
+     */
+    public function removeDomain(int $tenantId, string $domain): bool
+    {
+        return $this->db->delete('tenant_domains', 'tenant_id = ? AND domain = ?', [$tenantId, $domain]) > 0;
+    }
+
+    /**
+     * Gibt alle Domains eines Tenants zurück
+     */
+    public function getDomains(int $tenantId): array
+    {
+        return $this->db->fetchAll(
+            "SELECT * FROM tenant_domains WHERE tenant_id = ? ORDER BY is_primary DESC",
+            [$tenantId]
+        );
+    }
+
+    /**
+     * Aktualisiert das Branding eines Tenants
+     */
+    public function updateBranding(int $tenantId, array $data): bool
+    {
+        $allowedFields = [
+            'site_name', 'site_name_full', 'tagline', 'logo_path', 'favicon_path',
+            'primary_color', 'secondary_color', 'accent_color',
+            'welcome_text_de', 'welcome_text_en', 'footer_text',
+            'custom_css', 'custom_js',
+            'social_facebook', 'social_instagram', 'social_youtube'
+        ];
+
+        $updateData = array_intersect_key($data, array_flip($allowedFields));
+
+        if (empty($updateData)) {
+            return false;
+        }
+
+        // Prüfe ob Branding existiert
+        $exists = $this->db->fetchColumn(
+            "SELECT tenant_id FROM tenant_branding WHERE tenant_id = ?",
+            [$tenantId]
+        );
+
+        if ($exists) {
+            return $this->db->update('tenant_branding', $updateData, 'tenant_id = ?', [$tenantId]) > 0;
+        } else {
+            $updateData['tenant_id'] = $tenantId;
+            return $this->db->insert('tenant_branding', $updateData) > 0;
+        }
+    }
+
+    /**
+     * Gibt das Branding eines Tenants zurück
+     */
+    public function getBranding(int $tenantId): ?array
+    {
+        return $this->db->fetchOne(
+            "SELECT * FROM tenant_branding WHERE tenant_id = ?",
+            [$tenantId]
+        );
+    }
+
+    /**
+     * Prüft ob ein Slug verfügbar ist
+     */
+    public function isSlugAvailable(string $slug, ?int $excludeTenantId = null): bool
+    {
+        $sql = "SELECT id FROM tenants WHERE slug = ?";
+        $params = [$slug];
+
+        if ($excludeTenantId) {
+            $sql .= " AND id != ?";
+            $params[] = $excludeTenantId;
+        }
+
+        return $this->db->fetchOne($sql, $params) === null;
+    }
+
+    /**
+     * Prüft ob eine Domain verfügbar ist
+     */
+    public function isDomainAvailable(string $domain, ?int $excludeTenantId = null): bool
+    {
+        $sql = "SELECT td.id FROM tenant_domains td WHERE td.domain = ?";
+        $params = [$domain];
+
+        if ($excludeTenantId) {
+            $sql .= " AND td.tenant_id != ?";
+            $params[] = $excludeTenantId;
+        }
+
+        return $this->db->fetchOne($sql, $params) === null;
+    }
+
+    /**
+     * Generiert einen URL-sicheren Slug aus einem Namen
+     */
+    private function generateSlug(string $name): string
+    {
+        $slug = strtolower($name);
+        $slug = preg_replace('/[^a-z0-9]+/', '-', $slug);
+        $slug = trim($slug, '-');
+
+        // Sicherstellen dass Slug einzigartig ist
+        $baseSlug = $slug;
+        $counter = 1;
+        while (!$this->isSlugAvailable($slug)) {
+            $slug = $baseSlug . '-' . $counter;
+            $counter++;
+        }
+
+        return $slug;
+    }
+
+    /**
+     * Generiert eine UUID v4
+     */
+    private function generateUuid(): string
+    {
+        $data = random_bytes(16);
+        $data[6] = chr(ord($data[6]) & 0x0f | 0x40);
+        $data[8] = chr(ord($data[8]) & 0x3f | 0x80);
+        return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
+    }
+
+    /**
+     * Berechnet das Trial-Ende (14 Tage)
+     */
+    private function calculateTrialEnd(): string
+    {
+        return date('Y-m-d H:i:s', strtotime('+14 days'));
+    }
+
+    /**
+     * Gibt die ID des Default-Plans (Free) zurück
+     */
+    private function getDefaultPlanId(): int
+    {
+        $plan = $this->db->fetchOne("SELECT id FROM plans WHERE slug = 'free' LIMIT 1");
+        return $plan ? (int)$plan['id'] : 1;
+    }
+
+    /**
+     * Aktiviert einen Tenant (z.B. nach Zahlung)
+     */
+    public function activate(int $tenantId): bool
+    {
+        return $this->db->update('tenants', ['status' => 'active'], 'id = ?', [$tenantId]) > 0;
+    }
+
+    /**
+     * Suspendiert einen Tenant (z.B. bei Zahlungsausfall)
+     */
+    public function suspend(int $tenantId): bool
+    {
+        return $this->db->update('tenants', ['status' => 'suspended'], 'id = ?', [$tenantId]) > 0;
+    }
+}
diff --git a/aurora-livecam/src/Tenant/TenantSettingsManager.php b/aurora-livecam/src/Tenant/TenantSettingsManager.php
new file mode 100644
index 0000000..07e7e0d
--- /dev/null
+++ b/aurora-livecam/src/Tenant/TenantSettingsManager.php
@@ -0,0 +1,427 @@
+<?php
+/**
+ * TenantSettingsManager - DB-basierte Settings pro Tenant
+ *
+ * Erweitert/ersetzt SettingsManager für Multi-Tenant Betrieb
+ * Fällt auf den alten SettingsManager zurück wenn DB nicht verfügbar
+ */
+
+namespace AuroraLivecam\Tenant;
+
+use AuroraLivecam\Core\Database;
+use AuroraLivecam\Core\TenantResolver;
+
+class TenantSettingsManager
+{
+    private Database $db;
+    private TenantResolver $resolver;
+    private int $tenantId;
+    private array $settings = [];
+    private bool $loaded = false;
+    private bool $dbAvailable = false;
+
+    // Fallback auf Legacy-SettingsManager
+    private ?\SettingsManager $legacyManager = null;
+
+    public function __construct(?int $tenantId = null, ?Database $db = null, ?TenantResolver $resolver = null)
+    {
+        $this->db = $db ?? Database::getInstance();
+        $this->resolver = $resolver ?? TenantResolver::getInstance();
+        $this->tenantId = $tenantId ?? $this->resolver->getTenantId();
+
+        $this->checkDbAvailability();
+    }
+
+    /**
+     * Prüft ob die DB verfügbar ist
+     */
+    private function checkDbAvailability(): void
+    {
+        try {
+            $this->db->fetchOne("SELECT 1 FROM tenant_settings LIMIT 1");
+            $this->dbAvailable = true;
+        } catch (\Exception $e) {
+            $this->dbAvailable = false;
+        }
+    }
+
+    /**
+     * Lädt alle Settings für den Tenant
+     */
+    private function load(): void
+    {
+        if ($this->loaded) {
+            return;
+        }
+
+        // Wenn keine DB, nutze Legacy
+        if (!$this->dbAvailable || $this->tenantId === 0) {
+            $this->loadFromLegacy();
+            return;
+        }
+
+        $rows = $this->db->fetchAll(
+            "SELECT setting_key, setting_value FROM tenant_settings WHERE tenant_id = ?",
+            [$this->tenantId]
+        );
+
+        foreach ($rows as $row) {
+            $value = $row['setting_value'];
+            // JSON-Werte parsen
+            if ($value !== null && ($value[0] === '{' || $value[0] === '[')) {
+                $decoded = json_decode($value, true);
+                if (json_last_error() === JSON_ERROR_NONE) {
+                    $value = $decoded;
+                }
+            }
+            // Booleans und Zahlen konvertieren
+            elseif ($value === 'true') $value = true;
+            elseif ($value === 'false') $value = false;
+            elseif (is_numeric($value)) $value = strpos($value, '.') !== false ? (float)$value : (int)$value;
+
+            $this->settings[$row['setting_key']] = $value;
+        }
+
+        // Defaults für fehlende Keys
+        $this->settings = array_merge($this->getDefaults(), $this->settings);
+        $this->loaded = true;
+    }
+
+    /**
+     * Fallback auf Legacy SettingsManager
+     */
+    private function loadFromLegacy(): void
+    {
+        if ($this->legacyManager === null) {
+            // Legacy-Manager einbinden
+            $legacyFile = dirname(__DIR__, 2) . '/SettingsManager.php';
+            if (file_exists($legacyFile) && !class_exists('\SettingsManager')) {
+                require_once $legacyFile;
+            }
+
+            if (class_exists('\SettingsManager')) {
+                $this->legacyManager = new \SettingsManager();
+            }
+        }
+
+        if ($this->legacyManager) {
+            // Konvertiere Legacy-Settings in unser Format
+            $this->settings = $this->convertLegacySettings($this->legacyManager);
+        } else {
+            $this->settings = $this->getDefaults();
+        }
+
+        $this->loaded = true;
+    }
+
+    /**
+     * Konvertiert Legacy-Settings
+     */
+    private function convertLegacySettings(\SettingsManager $legacy): array
+    {
+        $settings = $this->getDefaults();
+
+        // Mappe Legacy-Werte
+        $mappings = [
+            'viewer_display.enabled' => 'viewer_display.enabled',
+            'viewer_display.min_viewers' => 'viewer_display.min_viewers',
+            'video_mode.play_in_player' => 'video_mode.play_in_player',
+            'video_mode.allow_download' => 'video_mode.allow_download',
+            'timelapse.default_speed' => 'timelapse.default_speed',
+            'ui_display.show_recommendation_banner' => 'ui_display.show_recommendation_banner',
+            'ui_display.show_qr_code' => 'ui_display.show_qr_code',
+            'ui_display.show_social_media' => 'ui_display.show_social_media',
+            'content.guestbook_enabled' => 'content.guestbook_enabled',
+            'content.gallery_enabled' => 'content.gallery_enabled',
+            'weather.enabled' => 'weather.enabled',
+            'weather.location' => 'weather.location',
+            'weather.lat' => 'weather.lat',
+            'weather.lon' => 'weather.lon',
+            'seo.custom_title' => 'seo.custom_title',
+            'seo.meta_description' => 'seo.meta_description',
+        ];
+
+        foreach ($mappings as $legacyKey => $newKey) {
+            $value = $legacy->get($legacyKey);
+            if ($value !== null) {
+                $settings[$newKey] = $value;
+            }
+        }
+
+        return $settings;
+    }
+
+    /**
+     * Gibt einen Setting-Wert zurück (mit Dot-Notation)
+     */
+    public function get(string $key, mixed $default = null): mixed
+    {
+        $this->load();
+
+        // Direkte Keys
+        if (isset($this->settings[$key])) {
+            return $this->settings[$key];
+        }
+
+        // Dot-Notation auflösen
+        $keys = explode('.', $key);
+        $value = $this->settings;
+
+        foreach ($keys as $k) {
+            if (!is_array($value) || !isset($value[$k])) {
+                return $default;
+            }
+            $value = $value[$k];
+        }
+
+        return $value;
+    }
+
+    /**
+     * Setzt einen Setting-Wert
+     */
+    public function set(string $key, mixed $value): bool
+    {
+        $this->load();
+
+        // Wenn keine DB, nutze Legacy
+        if (!$this->dbAvailable || $this->tenantId === 0) {
+            return $this->setLegacy($key, $value);
+        }
+
+        // Wert für DB vorbereiten
+        $dbValue = $this->prepareValueForDb($value);
+
+        // UPSERT
+        $sql = "INSERT INTO tenant_settings (tenant_id, setting_key, setting_value)
+                VALUES (?, ?, ?)
+                ON DUPLICATE KEY UPDATE setting_value = VALUES(setting_value)";
+
+        $result = $this->db->execute($sql, [$this->tenantId, $key, $dbValue]) > 0;
+
+        if ($result) {
+            $this->settings[$key] = $value;
+        }
+
+        return $result;
+    }
+
+    /**
+     * Setzt Legacy-Setting
+     */
+    private function setLegacy(string $key, mixed $value): bool
+    {
+        if ($this->legacyManager) {
+            return $this->legacyManager->set($key, $value);
+        }
+        return false;
+    }
+
+    /**
+     * Bereitet einen Wert für die DB vor
+     */
+    private function prepareValueForDb(mixed $value): string
+    {
+        if (is_bool($value)) {
+            return $value ? 'true' : 'false';
+        }
+        if (is_array($value) || is_object($value)) {
+            return json_encode($value);
+        }
+        return (string)$value;
+    }
+
+    /**
+     * Löscht ein Setting
+     */
+    public function delete(string $key): bool
+    {
+        if (!$this->dbAvailable || $this->tenantId === 0) {
+            return false;
+        }
+
+        $result = $this->db->delete('tenant_settings', 'tenant_id = ? AND setting_key = ?', [$this->tenantId, $key]) > 0;
+
+        if ($result) {
+            unset($this->settings[$key]);
+        }
+
+        return $result;
+    }
+
+    /**
+     * Gibt alle Settings zurück
+     */
+    public function all(): array
+    {
+        $this->load();
+        return $this->settings;
+    }
+
+    /**
+     * Setzt mehrere Settings auf einmal
+     */
+    public function setMany(array $settings): bool
+    {
+        foreach ($settings as $key => $value) {
+            $this->set($key, $value);
+        }
+        return true;
+    }
+
+    /**
+     * Default-Settings
+     */
+    private function getDefaults(): array
+    {
+        return [
+            // Viewer Display
+            'viewer_display.enabled' => true,
+            'viewer_display.min_viewers' => 1,
+            'viewer_display.update_interval' => 5,
+
+            // Video Mode
+            'video_mode.play_in_player' => true,
+            'video_mode.allow_download' => true,
+
+            // Timelapse
+            'timelapse.default_speed' => 1,
+            'timelapse.available_speeds' => [1, 10, 100],
+            'timelapse.reverse_enabled' => true,
+
+            // UI Display
+            'ui_display.show_recommendation_banner' => true,
+            'ui_display.show_qr_code' => true,
+            'ui_display.show_social_media' => true,
+
+            // Zoom
+            'zoom.show_controls' => true,
+            'zoom.max_level' => 4.0,
+
+            // Content
+            'content.guestbook_enabled' => true,
+            'content.gallery_enabled' => true,
+            'content.ai_events_enabled' => true,
+
+            // Weather
+            'weather.enabled' => true,
+            'weather.location' => 'Zürich,CH',
+            'weather.lat' => '47.3769',
+            'weather.lon' => '8.5417',
+            'weather.update_interval' => 5,
+            'weather.units' => 'metric',
+
+            // SEO
+            'seo.custom_title' => '',
+            'seo.meta_description' => '',
+            'seo.meta_keywords' => '',
+
+            // Theme
+            'theme.default' => 'theme-legacy',
+            'theme.show_switcher' => false,
+        ];
+    }
+
+    // === Helper-Methoden (kompatibel mit altem SettingsManager) ===
+
+    public function isWeatherEnabled(): bool
+    {
+        return $this->get('weather.enabled', true) === true;
+    }
+
+    public function getWeatherLocation(): string
+    {
+        return $this->get('weather.location', 'Zürich,CH');
+    }
+
+    public function getWeatherCoords(): array
+    {
+        return [
+            'lat' => $this->get('weather.lat', '47.3769'),
+            'lon' => $this->get('weather.lon', '8.5417'),
+        ];
+    }
+
+    public function getWeatherUpdateInterval(): int
+    {
+        return (int)$this->get('weather.update_interval', 5);
+    }
+
+    public function shouldShowViewers(): bool
+    {
+        return $this->get('viewer_display.enabled', true) === true;
+    }
+
+    public function getMinViewers(): int
+    {
+        return (int)$this->get('viewer_display.min_viewers', 1);
+    }
+
+    public function isGuestbookEnabled(): bool
+    {
+        return $this->get('content.guestbook_enabled', true) === true;
+    }
+
+    public function isGalleryEnabled(): bool
+    {
+        return $this->get('content.gallery_enabled', true) === true;
+    }
+
+    /**
+     * AJAX-Handler (kompatibel mit altem SettingsManager)
+     */
+    public function handleAjax(): void
+    {
+        if ($_SERVER['REQUEST_METHOD'] !== 'POST') return;
+        if (!isset($_POST['settings_action'])) return;
+
+        header('Content-Type: application/json');
+
+        // Auth prüfen
+        if (!$this->isAdmin()) {
+            echo json_encode(['success' => false, 'error' => 'Unauthorized']);
+            exit;
+        }
+
+        $action = $_POST['settings_action'];
+
+        if ($action === 'update' && isset($_POST['key'], $_POST['value'])) {
+            $key = $_POST['key'];
+            $value = $_POST['value'];
+
+            // Booleans konvertieren
+            if ($value === 'true') $value = true;
+            elseif ($value === 'false') $value = false;
+
+            $success = $this->set($key, $value);
+            echo json_encode(['success' => $success]);
+            exit;
+        }
+
+        if ($action === 'get') {
+            echo json_encode(['success' => true, 'data' => $this->all()]);
+            exit;
+        }
+
+        echo json_encode(['success' => false, 'error' => 'Unknown action']);
+        exit;
+    }
+
+    /**
+     * Prüft ob der User Admin ist
+     */
+    private function isAdmin(): bool
+    {
+        return isset($_SESSION['admin']) && $_SESSION['admin'] === true;
+    }
+
+    /**
+     * Lädt Settings neu aus der DB
+     */
+    public function reload(): void
+    {
+        $this->loaded = false;
+        $this->settings = [];
+        $this->load();
+    }
+}
diff --git a/aurora-livecam/src/bootstrap.php b/aurora-livecam/src/bootstrap.php
new file mode 100644
index 0000000..6a089e7
--- /dev/null
+++ b/aurora-livecam/src/bootstrap.php
@@ -0,0 +1,179 @@
+<?php
+/**
+ * Bootstrap - Initialisiert die Multi-Tenant Umgebung
+ *
+ * Einbinden am Anfang von index.php:
+ *   require_once __DIR__ . '/src/bootstrap.php';
+ */
+
+// Autoloader für src/ Klassen
+spl_autoload_register(function ($class) {
+    // Namespace-Präfix
+    $prefix = 'AuroraLivecam\\';
+    $baseDir = __DIR__ . '/';
+
+    // Prüfe ob die Klasse unseren Namespace verwendet
+    $len = strlen($prefix);
+    if (strncmp($prefix, $class, $len) !== 0) {
+        return;
+    }
+
+    // Relativer Klassenname
+    $relativeClass = substr($class, $len);
+
+    // Pfad zur Datei
+    $file = $baseDir . str_replace('\\', '/', $relativeClass) . '.php';
+
+    if (file_exists($file)) {
+        require $file;
+    }
+});
+
+use AuroraLivecam\Core\TenantResolver;
+use AuroraLivecam\Core\Database;
+
+/**
+ * Gibt die Site-Konfiguration basierend auf dem aktuellen Tenant zurück
+ * Ersetzt den hardcoded Domain-Switch in index.php
+ */
+function getSiteConfig(): array
+{
+    // Legacy SettingsManager laden
+    $settingsFile = dirname(__DIR__) . '/SettingsManager.php';
+    if (!class_exists('SettingsManager') && file_exists($settingsFile)) {
+        require_once $settingsFile;
+    }
+
+    $settingsManager = new \SettingsManager();
+
+    // Wenn Multi-Tenant nicht aktiviert, nutze Legacy-Modus
+    if (!$settingsManager->isMultiTenantEnabled()) {
+        return getLegacySiteConfig();
+    }
+
+    // Multi-Tenant Modus
+    try {
+        $resolver = TenantResolver::getInstance();
+        $tenant = $resolver->resolve();
+        $branding = $resolver->getBranding();
+
+        if (!$tenant) {
+            return getLegacySiteConfig();
+        }
+
+        return [
+            'tenant_id' => $tenant['id'],
+            'tenant_slug' => $tenant['slug'],
+            'is_multi_tenant' => true,
+            'site_name' => $branding['site_name'] ?? $tenant['name'],
+            'site_name_full' => $branding['site_name_full'] ?? $tenant['name'],
+            'tagline' => $branding['tagline'] ?? '',
+            'logo_path' => $branding['logo_path'] ?? null,
+            'favicon_path' => $branding['favicon_path'] ?? null,
+            'primary_color' => $branding['primary_color'] ?? '#667eea',
+            'secondary_color' => $branding['secondary_color'] ?? '#764ba2',
+            'accent_color' => $branding['accent_color'] ?? '#f093fb',
+            'welcome_de' => $branding['welcome_text_de'] ?? '',
+            'welcome_en' => $branding['welcome_text_en'] ?? '',
+            'footer_text' => $branding['footer_text'] ?? '',
+            'custom_css' => $branding['custom_css'] ?? '',
+            'social' => [
+                'facebook' => $branding['social_facebook'] ?? '',
+                'instagram' => $branding['social_instagram'] ?? '',
+                'youtube' => $branding['social_youtube'] ?? '',
+            ],
+        ];
+
+    } catch (\Exception $e) {
+        // Fallback auf Legacy bei Fehlern
+        return getLegacySiteConfig();
+    }
+}
+
+/**
+ * Legacy Site-Konfiguration (hardcoded Domains)
+ * Kompatibilität mit bestehendem Code
+ */
+function getLegacySiteConfig(): array
+{
+    $host = $_SERVER['HTTP_HOST'] ?? 'localhost';
+    $isSeecam = (stripos($host, 'seecam.ch') !== false);
+
+    if ($isSeecam) {
+        return [
+            'tenant_id' => 0,
+            'tenant_slug' => 'seecam',
+            'is_multi_tenant' => false,
+            'site_name' => 'Seecam',
+            'site_name_full' => 'Seecam.ch - Live Webcam am See',
+            'tagline' => 'Ihre Live-Webcam am See',
+            'logo_path' => null,
+            'favicon_path' => null,
+            'primary_color' => '#667eea',
+            'secondary_color' => '#764ba2',
+            'accent_color' => '#f093fb',
+            'welcome_de' => 'Willkommen bei Seecam - Ihrer Live-Webcam am See!',
+            'welcome_en' => 'Welcome to Seecam - Your Live Webcam at the Lake!',
+            'footer_text' => '',
+            'custom_css' => '',
+            'social' => [
+                'facebook' => '',
+                'instagram' => '',
+                'youtube' => '',
+            ],
+        ];
+    }
+
+    // Default: Aurora
+    return [
+        'tenant_id' => 0,
+        'tenant_slug' => 'aurora',
+        'is_multi_tenant' => false,
+        'site_name' => 'Aurora',
+        'site_name_full' => 'Aurora Weather Livecam - Zürich Oberland',
+        'tagline' => 'Wetter Webcam Schweiz - Zürich Oberland',
+        'logo_path' => null,
+        'favicon_path' => null,
+        'primary_color' => '#667eea',
+        'secondary_color' => '#764ba2',
+        'accent_color' => '#f093fb',
+        'welcome_de' => 'Willkommen bei Aurora Weather Livecam - Ihre Wetter-Webcam im Zürcher Oberland mit AI-Erkennung für Aurora, Starlink und mehr!',
+        'welcome_en' => 'Welcome to Aurora Weather Livecam - Your weather webcam in the Zurich Oberland with AI detection for Aurora, Starlink and more!',
+        'footer_text' => '',
+        'custom_css' => '',
+        'social' => [
+            'facebook' => '',
+            'instagram' => '',
+            'youtube' => '',
+        ],
+    ];
+}
+
+/**
+ * Redirect Handler für alte Domains
+ */
+function handleDomainRedirects(): void
+{
+    $host = $_SERVER['HTTP_HOST'] ?? '';
+
+    // Alte Aurora-Domains auf neue Domain umleiten
+    $oldDomains = [
+        'www.aurora-wetter-lifecam.ch',
+        'aurora-wetter-lifecam.ch',
+        'www.aurora-wetter-livecam.ch',
+        'aurora-wetter-livecam.ch'
+    ];
+
+    $newDomain = 'www.aurora-weather-livecam.com';
+
+    if (in_array($host, $oldDomains)) {
+        $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https' : 'http';
+        $requestUri = $_SERVER['REQUEST_URI'] ?? '/';
+        header("HTTP/1.1 301 Moved Permanently");
+        header("Location: {$protocol}://{$newDomain}{$requestUri}");
+        exit;
+    }
+}
+
+// Domain-Redirects automatisch ausführen
+handleDomainRedirects();