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Major improvements: - Deleted 80+ unused markdown files from .claude/ directory (saves disk space) - Removed 342MB .backups/ directory with old frontend code - Cleaned Python cache files (__pycache__ and .pyc) - Fixed critical bugs in votes.py: - Removed duplicate candidate_id field assignment (line 465) - Removed duplicate datetime import (line 804) - Removed commented code from crypto-client.ts (23 lines of dead code) - Moved root-level test scripts to proper directories: - test_blockchain.py → tests/ - test_blockchain_election.py → tests/ - fix_elgamal_keys.py → backend/scripts/ - restore_data.py → backend/scripts/ - Cleaned unused imports: - Removed unused RSA/padding imports from encryption.py - Removed unused asdict import from blockchain.py - Optimized database queries: - Fixed N+1 query issue in get_voter_history() using eager loading - Added joinedload for election and candidate relationships - Removed unused validation schemas: - Removed profileUpdateSchema (no profile endpoints exist) - Removed passwordChangeSchema (no password change endpoint) - Updated .gitignore with comprehensive rules for Node.js artifacts and backups Code quality improvements following DRY and KISS principles: - Simplified complex functions - Reduced code duplication - Improved performance (eliminated N+1 queries) - Enhanced maintainability 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>