ca1a1f3219
Simplify material validation tab by removing Excel-related data source options and associated logic, keeping only database-driven validation modes. Changes: - Remove Excel file and Excel full workflow radio buttons from UI - Remove Excel file selector components (excel_existing_frame, excel_full_frame) - Update _on_source_mode_change to handle only database modes - Simplify start_validation input validation for database modes only - Update _validation_worker to call only database validation methods The UI now presents only two data source options: 1. Database - Full table validation 2. Database - ProductionID filtered validation Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>