feat: Implement ROM version management and proposal approval system

- Introduced `RomVersionManager` for managing ROM snapshots, including automatic backups, manual checkpoints, and corruption detection.
- Added `ProposalApprovalManager` to facilitate collaborative proposal submissions and voting, enhancing team workflows.
- Updated `CollaborationPanel` to integrate version management features, allowing users to track changes and manage proposals effectively.
- Enhanced documentation to reflect new functionalities and usage instructions for version management and collaboration features.

docs/z3ed/README.md

@@ -895,7 +895,9 @@ The AI response appears in your chat history and can reference specific details
 -   **Multimodal Vision Testing**: Comprehensive test suite for Gemini vision capabilities with screenshot integration
 -   **AI-Controlled GUI Automation**: Natural language parsing (`AIActionParser`) and test script generation (`GuiActionGenerator`) for automated tile placement
 -   **gRPC Windows Build Optimization**: vcpkg integration for 10-20x faster Windows builds, removed abseil-cpp submodule  
--   **Collaboration UI Panel**: New `CollaborationPanel` widget with ROM sync history, snapshot gallery, and proposal management
+-   **ROM Version Management System**: `RomVersionManager` with automatic snapshots, safe points, corruption detection, and rollback capabilities
+-   **Proposal Approval Framework**: `ProposalApprovalManager` with host/majority/unanimous voting modes to protect ROM from unwanted changes
+-   **Collaboration UI Panel**: `CollaborationPanel` widget with version history, ROM sync tracking, snapshot gallery, and approval workflow
 -   **Improved Documentation**: Consolidated architecture, enhancement plans, and build instructions with JSON-first approach
 
 ## 12. Troubleshooting