Neue Branding-Page und Gäste-PWA reagiert nun auf Branding-Einstellungen vom event-admin. Implemented local Google Fonts pipeline and admin UI selects for branding and invites.

- Added fonts:sync-google command (uses GOOGLE_FONTS_API_KEY, generates /public/fonts/google files, manifest, CSS, cache flush) and
    exposed manifest via new GET /api/v1/tenant/fonts endpoint with fallbacks for existing local fonts.
  - Imported generated fonts CSS, added API client + font loader hook, and wired branding page font fields to searchable selects (with
    custom override) that auto-load selected fonts.
  - Invites layout editor now offers font selection per element with runtime font loading for previews/export alignment.
  - New tests cover font sync command and font manifest API.

  Tests run: php artisan test --filter=Fonts --testsuite=Feature.
  Note: repository already has other modified files (e.g., EventPublicController, SettingsStoreRequest, guest components, etc.); left
  untouched. Run php artisan fonts:sync-google after setting the API key to populate /public/fonts/google.

resources/js/guest/components/Header.tsx

@@ -27,6 +27,7 @@ import { DEFAULT_EVENT_BRANDING, useOptionalEventBranding } from '../context/Eve
 import { useOptionalNotificationCenter, type NotificationCenterValue } from '../context/NotificationCenterContext';
 import { useGuestTaskProgress, TASK_BADGE_TARGET } from '../hooks/useGuestTaskProgress';
 import { usePushSubscription } from '../hooks/usePushSubscription';
+import { getContrastingTextColor, relativeLuminance } from '../lib/color';
 
 const EVENT_ICON_COMPONENTS: Record<string, React.ComponentType<{ className?: string }>> = {
   heart: Heart,
@@ -66,7 +67,26 @@ function getInitials(name: string): string {
   return name.substring(0, 2).toUpperCase();
 }
 
-function renderEventAvatar(name: string, icon: unknown, accentColor: string, textColor: string) {
+function renderEventAvatar(name: string, icon: unknown, accentColor: string, textColor: string, logo?: { mode: 'emoticon' | 'upload'; value: string | null }) {
+  if (logo?.mode === 'upload' && logo.value) {
+    return (
+      <div className="flex h-10 w-10 items-center justify-center rounded-full bg-white shadow-sm">
+        <img src={logo.value} alt={name} className="h-9 w-9 rounded-full object-contain" />
+      </div>
+    );
+  }
+  if (logo?.mode === 'emoticon' && logo.value && isLikelyEmoji(logo.value)) {
+    return (
+      <div
+        className="flex h-10 w-10 items-center justify-center rounded-full text-xl shadow-sm"
+        style={{ backgroundColor: accentColor, color: textColor }}
+      >
+        <span aria-hidden>{logo.value}</span>
+        <span className="sr-only">{name}</span>
+      </div>
+    );
+  }
+
   if (typeof icon === 'string') {
     const trimmed = icon.trim();
     if (trimmed) {
@@ -113,7 +133,17 @@ export default function Header({ eventToken, title = '' }: { eventToken?: string
   const { t } = useTranslation();
   const brandingContext = useOptionalEventBranding();
   const branding = brandingContext?.branding ?? DEFAULT_EVENT_BRANDING;
-  const primaryForeground = '#ffffff';
+  const headerTextColor = React.useMemo(() => {
+    const primaryLum = relativeLuminance(branding.primaryColor);
+    const secondaryLum = relativeLuminance(branding.secondaryColor);
+    const avgLum = (primaryLum + secondaryLum) / 2;
+
+    if (avgLum > 0.55) {
+      return getContrastingTextColor(branding.primaryColor, '#0f172a', '#ffffff');
+    }
+
+    return '#ffffff';
+  }, [branding.primaryColor, branding.secondaryColor]);
   const { event, status } = useEventData();
   const notificationCenter = useOptionalNotificationCenter();
   const [notificationsOpen, setNotificationsOpen] = React.useState(false);
@@ -169,7 +199,7 @@ export default function Header({ eventToken, title = '' }: { eventToken?: string
 
   const headerStyle: React.CSSProperties = {
     background: `linear-gradient(135deg, ${branding.primaryColor}, ${branding.secondaryColor})`,
-    color: primaryForeground,
+    color: headerTextColor,
     fontFamily: branding.fontFamily ?? undefined,
   };
 
@@ -199,7 +229,7 @@ export default function Header({ eventToken, title = '' }: { eventToken?: string
       style={headerStyle}
     >
       <div className="flex items-center gap-3">
-        {renderEventAvatar(event.name, event.type?.icon, accentColor, primaryForeground)}
+        {renderEventAvatar(event.name, event.type?.icon, accentColor, headerTextColor, branding.logo)}
         <div className="flex flex-col" style={branding.fontFamily ? { fontFamily: branding.fontFamily } : undefined}>
           <div className="font-semibold text-base">{event.name}</div>
           {guestName && (