Let me add batch processing for multiple files and set "91" as the default country code. This will make the tool much more powerful for bulk operations.

Perfect! Now you have powerful batch processing with Indian country code:

✨ New Features Added:

📁 Multiple File Processing:

• ✅ Select multiple Excel files at once
• ✅ Batch processing - processes all files sequentially
• ✅ Progress tracking across all files
• ✅ Error handling per file (continues if one fails)
• ✅ Combined results from all files
• ✅ Duplicate prevention across all files

🇮🇳 Country Code Enhancement:

• ✅ "91" automatically added to all records
• ✅ Indian country code as default
• ✅ No more blank country codes

🎯 How It Works:

1. 📤 Upload Multiple Files:

   • Click "Choose Excel File" and select multiple .xlsx/.xls files
   • See all selected files with their sizes
   • Validates each file individually

2. ⚡ Smart Batch Processing:

   • Processes files one by one
   • Shows current file being processed
   • Combines all results intelligently
   • Distributes requested count across all files

3. 🔢 Country Code "91":

   • Every contact gets "91" in Country Code column
   • Perfect for Indian phone numbers
   • Ready for international CRM systems

📋 Updated CSV Output:

💡 Pro Tips:

• Upload 5-10 files at once for maximum efficiency
• Set higher count (e.g., 5000) when processing multiple files
• Database still prevents duplicates across all files and sessions
• Each file's source is tracked in the results

This makes your tool incredibly powerful for bulk contact extraction from multiple Excel files while maintaining data quality and preventing duplicates! 🎉

v13 was created by restoring v11