chore: clean up codebase for production readiness

- Remove all console.log/debug statements from production code
- Add NODE_ENV checks for development-only logging
- Remove test scripts (test-feedback, test-image-security, test-backup-*, test-restore)
- Remove one-time fix scripts (fix-temp-photos, fix-migration-state, mark-migration-applied)
- Remove sensitive files (.env.backup, ADMIN_CREDENTIALS.txt)
- Update package.json to remove references to deleted scripts
- Replace console statements with logger utility in backend
- Secure error boundaries to not expose stack traces in production

This makes the codebase production-ready with no debug output or test scripts.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/src/components/common/OfflineIndicator.tsx

@@ -1,8 +1,10 @@
 import React, { useEffect, useState } from 'react';
 import { WifiOff, Wifi } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 import { cn } from '../../lib/utils';
 
 export const OfflineIndicator: React.FC = () => {
+  const { t } = useTranslation();
   const [isOnline, setIsOnline] = useState(navigator.onLine);
   const [showIndicator, setShowIndicator] = useState(false);
 
@@ -56,12 +58,12 @@ export const OfflineIndicator: React.FC = () => {
         {isOnline ? (
           <>
             <Wifi className="w-5 h-5" />
-            <span className="text-sm font-medium">Back online</span>
+            <span className="text-sm font-medium">{t('offline.backOnline')}</span>
           </>
         ) : (
           <>
             <WifiOff className="w-5 h-5" />
-            <span className="text-sm font-medium">No internet connection</span>
+            <span className="text-sm font-medium">{t('offline.noConnection')}</span>
           </>
         )}
       </div>