Added comprehensive CSV rates management interface to the frontend dashboard with full CRUD operations.
## Backend Changes
- Added `GET /api/v1/admin/csv-rates/files` endpoint to list all uploaded CSV files with metadata
- Added `DELETE /api/v1/admin/csv-rates/files/:filename` endpoint to delete CSV files and their configurations
- Both endpoints provide frontend-compatible responses with file info (filename, size, rowCount, uploadedAt)
- File deletion includes both filesystem cleanup and database configuration removal
## Frontend Changes
- Added "CSV Rates" navigation item to dashboard sidebar (ADMIN only)
- Moved CSV rates page from `/app/admin/csv-rates` to `/app/dashboard/admin/csv-rates` for proper dashboard integration
- Updated CsvUpload component to include required `companyEmail` field
- Component now properly validates and sends all required fields (companyName, companyEmail, file)
- Enhanced form validation with email input type
## Features
- ✅ Upload CSV rate files with company name and email
- ✅ List all uploaded CSV files with metadata (filename, size, row count, upload date)
- ✅ Delete CSV files with confirmation dialog
- ✅ Real-time file validation (format, size limit 10MB)
- ✅ Auto-refresh after successful operations
- ✅ ADMIN role-based access control
- ✅ Integrated into dashboard navigation
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
