fix: camera unmount, sticker trash, update reset

src/screens/AdminScreen.tsx

@@ -29,7 +29,7 @@ import {
 import { THEME } from '../styles/theme';
 import { logger } from '../services/logger';
 import KioskMode from '../../modules/kiosk-mode';
-import { AppSettings, loadSettings, saveSettings, APP_VERSION } from '../services/settings';
+import { AppSettings, loadSettings, saveSettings } from '../services/settings';
 import { FRAMES } from '../data/frames';
 
 interface AdminScreenProps {
@@ -229,7 +229,7 @@ export default function AdminScreen({ currentSettings, onSave, onClose }: AdminS
     }
 
     const updated: AppSettings = {
-      appVersion: APP_VERSION,
+      appLastUpdate: currentSettings.appLastUpdate,
       countdownDuration: duration,
       printerIp: ipTrimmed,
       adminPassword: password.trim(),

src/screens/CameraScreen.tsx

@@ -56,6 +56,7 @@ interface CameraScreenProps {
   selectedFrameId: string | null;
   footerText: string;
   useFrontCamera: boolean;
+  isObscured: boolean;
 }
 
 export default function CameraScreen({
@@ -74,6 +75,7 @@ export default function CameraScreen({
   selectedFrameId,
   footerText,
   useFrontCamera,
+  isObscured,
 }: CameraScreenProps) {
   const [permission, requestPermission] = useCameraPermissions();
   const [isUsbConnected, setIsUsbConnected] = useState<boolean>(false);
@@ -653,10 +655,10 @@ export default function CameraScreen({
       {/* Camera Preview Background */}
       <View style={styles.previewContainer}>
         <View style={styles.cameraWrapper}>
-          {Platform.OS === 'android' && !useFrontCamera ? (
+          {!isObscured && isUsbConnected && !useFrontCamera ? (
             <UsbCameraView 
               ref={usbCameraRef} 
-              style={[styles.cameraPreview, { position: 'absolute', opacity: 1, zIndex: 10 }]} 
+              style={StyleSheet.absoluteFill} 
             />
           ) : (
             <CameraView

src/screens/PreviewScreen.tsx

@@ -12,6 +12,7 @@ import {
   faRightFromBracket,
   faFaceGrinStars,
   faBorderAll,
+  faTrash,
 } from '@fortawesome/free-solid-svg-icons';
 import { THEME } from '../styles/theme';
 import { printImageLocal } from '../services/printer';
@@ -432,7 +433,7 @@ export default function PreviewScreen({
               ))}
             </View>
             <View style={styles.collageFooter}>
-              <Text style={styles.collageFooterText}>SCHNAPPIX FOTOBOX</Text>
+              <Text style={styles.collageFooterText}>{eventText}</Text>
               <Text style={styles.collageFooterDate}>{new Date().toLocaleDateString('de-DE')}</Text>
             </View>
           </View>
@@ -454,7 +455,7 @@ export default function PreviewScreen({
               ))}
             </View>
             <View style={styles.collageFooter}>
-              <Text style={styles.collageFooterText}>SCHNAPPIX FOTOBOX</Text>
+              <Text style={styles.collageFooterText}>{eventText}</Text>
             </View>
           </View>
         );
@@ -475,7 +476,7 @@ export default function PreviewScreen({
               ))}
             </View>
             <View style={styles.collageFooter}>
-              <Text style={styles.collageFooterText}>SCHNAPPIX FOTOBOX</Text>
+              <Text style={styles.collageFooterText}>{eventText}</Text>
             </View>
           </View>
         );
@@ -554,9 +555,20 @@ export default function PreviewScreen({
         )}
       </TouchableOpacity>
 
+      {/* Global Trash Can for Stickers */}
+      {selectedStickerId !== null && (
+        <TouchableOpacity
+          style={styles.globalTrashButton}
+          onPress={() => handleStickerDelete(selectedStickerId)}
+          activeOpacity={0.7}
+        >
+          <FontAwesomeIcon icon={faTrash} color="#fff" size={32} />
+        </TouchableOpacity>
+      )}
+
       {/* Right panel: Controls */}
       <View style={styles.controlPanel}>
-        <Text style={styles.header}>DEIN FOTO</Text>
+        <Text style={styles.header}>{eventText}</Text>
         
         {/* Thumbnail Reel for Photo Selection */}
         {photoUris.length > 1 && (
@@ -568,6 +580,7 @@ export default function PreviewScreen({
               <ScrollView horizontal showsHorizontalScrollIndicator={false} contentContainerStyle={styles.thumbnailReelContent}>
                 {photoUris.map((uri, idx) => {
                   const isActive = activeUris.includes(uri);
+                  const indexInSelection = activeUris.indexOf(uri) + 1;
                   return (
                     <TouchableOpacity 
                       key={idx} 
@@ -578,7 +591,7 @@ export default function PreviewScreen({
                       <Image source={{ uri }} style={styles.thumbnailImage} />
                       {isActive && (
                         <View style={styles.thumbnailCheck}>
-                          <Text style={{ color: '#fff', fontSize: 10, fontWeight: 'bold' }}>✓</Text>
+                          <Text style={{ color: '#fff', fontSize: 14, fontWeight: 'bold' }}>{indexInSelection}</Text>
                         </View>
                       )}
                     </TouchableOpacity>
@@ -739,6 +752,23 @@ const styles = StyleSheet.create({
     textShadowOffset: { width: 0, height: 0 },
     textShadowRadius: 12,
   },
+  globalTrashButton: {
+    position: 'absolute',
+    top: 40,
+    alignSelf: 'center',
+    width: 60,
+    height: 60,
+    borderRadius: 30,
+    backgroundColor: THEME.colors.error,
+    justifyContent: 'center',
+    alignItems: 'center',
+    zIndex: 9999,
+    shadowColor: '#000',
+    shadowOffset: { width: 0, height: 4 },
+    shadowOpacity: 0.5,
+    shadowRadius: 6,
+    elevation: 8,
+  },
   thumbnailInstruction: {
     color: THEME.colors.textMuted,
     fontSize: 12,