vibsin9322 a0efe6f637 Fix file upload errors and improve error handling
- Fix uploadAttachments method to use proper SupabaseHelper methods
- Add addFileAttachment method for proper database insertion
- Improve error handling with detailed logging and user feedback
- Add file upload progress tracking and cleanup on failure
- Fix direct supabase variable access issues
- Better error messages for users and developers

Bug fixes:
• File upload now works properly with Supabase Storage
• Database insertion errors are properly handled
• Failed uploads are cleaned up automatically
• More informative error messages displayed to users

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

Co-Authored-By: Claude <noreply@anthropic.com>
2025-08-19 14:08:28 +09:00
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