feat: dynamic collage layout based on photo selection count

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, saveSettings } from '../services/settings';
+import { AppSettings, loadSettings, saveSettings, APP_VERSION } from '../services/settings';
 import { FRAMES } from '../data/frames';
 
 interface AdminScreenProps {
@@ -229,6 +229,7 @@ export default function AdminScreen({ currentSettings, onSave, onClose }: AdminS
     }
 
     const updated: AppSettings = {
+      appVersion: APP_VERSION,
       countdownDuration: duration,
       printerIp: ipTrimmed,
       adminPassword: password.trim(),

src/screens/CameraScreen.tsx

@@ -108,7 +108,7 @@ export default function CameraScreen({
   const scale = useSharedValue(1);
 
   useEffect(() => {
-    if (countdown !== '') {
+    if (countdown !== null) {
       scale.value = 0.5;
       scale.value = withSpring(1.25, { damping: 10, stiffness: 120 }, () => {
         scale.value = withTiming(1.0, { duration: 150 });
@@ -147,7 +147,7 @@ export default function CameraScreen({
             PermissionsAndroid.PERMISSIONS.WRITE_EXTERNAL_STORAGE,
             PermissionsAndroid.PERMISSIONS.READ_EXTERNAL_STORAGE,
           ]);
-          logger.log('Android Permissions:', JSON.stringify(granted));
+          logger.log('Android Permissions: ' + JSON.stringify(granted));
         } catch (err) {
           console.warn('Failed to request Android permissions', err);
         }

src/screens/PreviewScreen.tsx

@@ -60,39 +60,43 @@ export default function PreviewScreen({
   const [isCapturing, setIsCapturing] = useState<boolean>(false);
   const [statusMessage, setStatusMessage] = useState<string>('');
   
-  const getRequiredPhotoCount = (l: CollageLayout) => {
-    if (l === 'single') return 1;
-    if (l === 'duo') return 2;
-    if (l === 'strip') return 3;
-    if (l === 'grid') return 4;
-    return 1;
-  };
-
   const [activeUris, setActiveUris] = useState<string[]>([]);
 
+  // Initialize activeUris with all available photos up to 4 when first loaded
   useEffect(() => {
-    const req = getRequiredPhotoCount(layout);
+    setActiveUris(photoUris.slice(-4));
-    setActiveUris(prev => {
+    const count = Math.min(photoUris.length, 4);
-      if (prev.length === req) return prev;
+    if (count === 1) setLayout('single');
-      if (prev.length > req) return prev.slice(prev.length - req);
+    else if (count === 2) setLayout('duo');
-      const available = photoUris.filter(u => !prev.includes(u));
+    else if (count === 3) setLayout('strip');
-      const needed = req - prev.length;
+    else if (count === 4) setLayout('grid');
-      const toAdd = available.slice(-needed);
+  }, [photoUris]);
-      return [...prev, ...toAdd];
-    });
-  }, [layout, photoUris]);
 
   const togglePhoto = (uri: string) => {
     logger.log(`Action: Toggled photo ${uri}`);
     setActiveUris(prev => {
-      const req = getRequiredPhotoCount(layout);
+      const isSelected = prev.includes(uri);
-      if (prev.includes(uri)) {
+      let nextUris: string[];
-        return prev; // Already selected, do nothing
+
+      if (isSelected) {
+        if (prev.length <= 1) return prev; // Don't allow 0 photos
+        nextUris = prev.filter(u => u !== uri);
+      } else {
+        if (prev.length >= 4) {
+          nextUris = [...prev.slice(1), uri]; // Keep max 4, replace oldest
+        } else {
+          nextUris = [...prev, uri];
+        }
       }
-      if (prev.length >= req) {
+
-        return [...prev.slice(1), uri]; // FIFO: remove oldest, add new
+      // Automatically update layout based on selection count
-      }
+      const count = nextUris.length;
-      return [...prev, uri];
+      if (count === 1) setLayout('single');
+      else if (count === 2) setLayout('duo');
+      else if (count === 3) setLayout('strip');
+      else if (count === 4) setLayout('grid');
+
+      return nextUris;
     });
   };
   
@@ -552,77 +556,36 @@ export default function PreviewScreen({
 
       {/* Right panel: Controls */}
       <View style={styles.controlPanel}>
-        <Text style={styles.header}>WÄHLE DEINEN STIL</Text>
+        <Text style={styles.header}>DEIN FOTO</Text>
-        
-        {/* Layout Selection */}
-        <View style={styles.layoutSelector}>
-          <TouchableOpacity 
-            style={[styles.layoutBtn, layout === 'single' && styles.layoutBtnActive]}
-            onPress={() => { logger.log('Action: Selected layout single'); setLayout('single'); }}
-          >
-            <Text style={styles.layoutBtnText}>Einzelbild</Text>
-          </TouchableOpacity>
-
-          <TouchableOpacity
-            style={[
-              styles.layoutBtn,
-              photoUris.length < 2 && styles.layoutBtnDisabled,
-              layout === 'duo' && styles.layoutBtnActive,
-            ]}
-            disabled={photoUris.length < 2}
-            onPress={() => { logger.log('Action: Selected layout duo'); setLayout('duo'); }}
-          >
-            <Text style={styles.layoutBtnText}>Duo (2)</Text>
-          </TouchableOpacity>
-
-          <TouchableOpacity
-            style={[
-              styles.layoutBtn,
-              photoUris.length < 3 && styles.layoutBtnDisabled,
-              layout === 'strip' && styles.layoutBtnActive,
-            ]}
-            disabled={photoUris.length < 3}
-            onPress={() => { logger.log('Action: Selected layout strip'); setLayout('strip'); }}
-          >
-            <Text style={styles.layoutBtnText}>Streifen (3)</Text>
-          </TouchableOpacity>
-
-          <TouchableOpacity
-            style={[
-              styles.layoutBtn,
-              photoUris.length < 4 && styles.layoutBtnDisabled,
-              layout === 'grid' && styles.layoutBtnActive,
-            ]}
-            disabled={photoUris.length < 4}
-            onPress={() => { logger.log('Action: Selected layout grid'); setLayout('grid'); }}
-          >
-            <Text style={styles.layoutBtnText}>Raster (4)</Text>
-          </TouchableOpacity>
-        </View>
         
         {/* Thumbnail Reel for Photo Selection */}
-        {photoUris.length > 1 && layout !== 'single' && (
+        {photoUris.length > 1 && (
-          <View style={styles.thumbnailReel}>
+          <View style={styles.thumbnailReelContainer}>
-            <ScrollView horizontal showsHorizontalScrollIndicator={false} contentContainerStyle={styles.thumbnailReelContent}>
+            <Text style={styles.thumbnailInstruction}>
-              {photoUris.map((uri, idx) => {
+              Tippe auf bis zu 4 Bilder für eine Collage:
-                const isActive = activeUris.includes(uri);
+            </Text>
-                return (
+            <View style={styles.thumbnailReel}>
-                  <TouchableOpacity 
+              <ScrollView horizontal showsHorizontalScrollIndicator={false} contentContainerStyle={styles.thumbnailReelContent}>
-                    key={idx} 
+                {photoUris.map((uri, idx) => {
-                    style={[styles.thumbnailWrapper, isActive && styles.thumbnailActive]}
+                  const isActive = activeUris.includes(uri);
-                    onPress={() => togglePhoto(uri)}
+                  return (
-                    activeOpacity={0.7}
+                    <TouchableOpacity 
-                  >
+                      key={idx} 
-                    <Image source={{ uri }} style={styles.thumbnailImage} />
+                      style={[styles.thumbnailWrapper, isActive && styles.thumbnailActive]}
-                    {isActive && (
+                      onPress={() => togglePhoto(uri)}
-                      <View style={styles.thumbnailCheck}>
+                      activeOpacity={0.7}
-                        <Text style={{ color: '#fff', fontSize: 10, fontWeight: 'bold' }}>✓</Text>
+                    >
-                      </View>
+                      <Image source={{ uri }} style={styles.thumbnailImage} />
-                    )}
+                      {isActive && (
-                  </TouchableOpacity>
+                        <View style={styles.thumbnailCheck}>
-                );
+                          <Text style={{ color: '#fff', fontSize: 10, fontWeight: 'bold' }}>✓</Text>
-              })}
+                        </View>
-            </ScrollView>
+                      )}
+                    </TouchableOpacity>
+                  );
+                })}
+              </ScrollView>
+            </View>
           </View>
         )}
 
@@ -776,37 +739,14 @@ const styles = StyleSheet.create({
     textShadowOffset: { width: 0, height: 0 },
     textShadowRadius: 12,
   },
-  layoutSelector: {
+  thumbnailInstruction: {
-    flexDirection: 'row',
+    color: THEME.colors.textMuted,
-    justifyContent: 'space-between',
-    marginBottom: THEME.spacing.md,
-  },
-  layoutBtn: {
-    flex: 1,
-    paddingVertical: THEME.spacing.sm,
-    backgroundColor: THEME.colors.surfaceSecondary,
-    borderWidth: 1,
-    borderColor: THEME.colors.border,
-    borderRadius: THEME.borderRadius.sm,
-    alignItems: 'center',
-    marginHorizontal: 3,
-  },
-  layoutBtnActive: {
-    backgroundColor: THEME.colors.accent,
-    borderColor: THEME.colors.accent,
-    shadowColor: THEME.colors.accent,
-    shadowOffset: { width: 0, height: 2 },
-    shadowOpacity: 0.5,
-    shadowRadius: 8,
-    elevation: 4,
-  },
-  layoutBtnDisabled: {
-    opacity: 0.3,
-  },
-  layoutBtnText: {
-    color: THEME.colors.text,
     fontSize: 12,
-    fontWeight: 'bold',
+    marginBottom: THEME.spacing.xs,
+    textAlign: 'center',
+  },
+  thumbnailReelContainer: {
+    marginBottom: THEME.spacing.md,
   },
   thumbnailReel: {
     marginBottom: THEME.spacing.md,