Fix JS exceptions crashing the app instantly

App.tsx

@@ -9,9 +9,13 @@ import { logger } from './src/services/logger';
 
 // Set up global error handler
 const defaultErrorHandler = (global as any).ErrorUtils.getGlobalHandler();
-(global as any).ErrorUtils.setGlobalHandler(async (error: any, isFatal: boolean) => {
+(global as any).ErrorUtils.setGlobalHandler((error: any, isFatal: boolean) => {
-  await logger.error(`Unhandled Exception (Fatal: ${isFatal})`, error);
+  logger.error(`Unhandled Exception (Fatal: ${isFatal})`, error)
-  defaultErrorHandler(error, isFatal);
+    .catch(console.error)
+    .finally(() => {
+      // Delay termination until log is written
+      defaultErrorHandler(error, isFatal);
+    });
 });
 import KioskMode from './modules/kiosk-mode';
 
@@ -83,7 +87,7 @@ export default function App() {
 
   const handleReset = () => {
     setPhotoUris([]);
-    setCurrentScreen('home');
+    setCurrentScreen('home'); // Go to home when cancelled
   };
 
   const handleSaveSettings = (updated: AppSettings) => {

src/screens/AdminScreen.tsx

@@ -1,4 +1,4 @@
-import React, { useState, useEffect } from 'react';
+import React, { useState, useEffect, useRef } from 'react';
 import {
   StyleSheet,
   Text,
@@ -66,6 +66,7 @@ export default function AdminScreen({ currentSettings, onSave, onClose }: AdminS
   const [printerIp, setPrinterIp] = useState<string>(currentSettings.printerIp);
   const [password, setPassword] = useState<string>(currentSettings.adminPassword);
   const [logs, setLogs] = useState<string | null>(null);
+  const scrollViewRef = useRef<ScrollView>(null);
   
   const [kioskActive, setKioskActive] = useState<boolean>(false);
   const [isDeviceOwner, setIsDeviceOwner] = useState<boolean>(false);
@@ -509,8 +510,8 @@ export default function AdminScreen({ currentSettings, onSave, onClose }: AdminS
             </View>
             <ScrollView 
               style={{ flex: 1, backgroundColor: '#000', padding: 10, borderRadius: 5 }}
-              ref={ref => { this.scrollView = ref }}
+              ref={scrollViewRef}
-              onContentSizeChange={() => this.scrollView?.scrollToEnd({animated: true})}
+              onContentSizeChange={() => scrollViewRef.current?.scrollToEnd({animated: true})}
             >
               <Text style={{ color: '#0f0', fontFamily: 'monospace' }}>{logs}</Text>
             </ScrollView>

src/screens/CameraScreen.tsx

@@ -160,7 +160,7 @@ export default function CameraScreen({
 
   // Cancel capture process
   const handleLocalCancel = () => {
-    if (countdownTimerRef.current) clearInterval(countdownTimerRef.current);
+    if (countdownTimerRef.current) clearTimeout(countdownTimerRef.current);
     if (burstTimerRef.current) clearTimeout(burstTimerRef.current);
     setCountdown(countdownDuration);
     setIsCapturing(false);