Keep GPS watermark user-owned across presets; add pinch/double-tap zoom to photo preview; collapse chrome strip on WB selection

src/components/PhotoViewerModal.tsx

@@ -1,8 +1,9 @@
 import React, { useEffect, useRef, useState } from 'react';
-import { View, Text, Modal, Image, TouchableOpacity, ScrollView, Share, Alert, useWindowDimensions } from 'react-native';
+import { View, Text, Modal, TouchableOpacity, ScrollView, Share, Alert, useWindowDimensions } from 'react-native';
 import * as Sharing from 'expo-sharing';
 import { X, Share2, Download, Trash2 } from 'lucide-react-native';
 import { PhotoEntry } from '../types';
+import ZoomableImage from './ZoomableImage';
 
 // Session photo viewer: swipe left/right across every photo taken/exported in
 // this session. Top shows preset name + index/total; trash deletes the photo
@@ -168,12 +169,7 @@ export default function PhotoViewerModal({
           >
             {photos.map((p) => (
               <View key={p.id} style={{ width }} className="justify-center items-center">
-                <Image
-                  source={{ uri: p.uri }}
-                  style={{ width, height: '100%' }}
-                  className=""
-                  resizeMode="contain"
-                />
+                <ZoomableImage uri={p.uri} width={width} />
               </View>
             ))}
           </ScrollView>