1. Department Management and User Administration
   - Enhanced department group statistics modal for better oversight of group performance
   - Implemented read-only status toggle for department assignments with visual feedback
   - Added confirmation modal for assigned department edits to prevent accidental changes
   - Improved user department management with transaction handling for data integrity
   - Added utility to cleanup orphan departments and maintain database consistency
   - Enhanced department assignment UI with better UX and simultaneous request prevention
   - Added filtering for users by assigned departments for improved navigation
   - Implemented department limitation handling and cache version updates on changes
   - Added red/green color indicators for operator online status visibility

2. Bot System and Webhook Improvements
   - Enhanced bot conditions handling with condition identifiers for better query filtering
   - Updated trigger link display to show bot name alongside trigger name for clarity
   - Disabled cache for bot actions and conditions to ensure real-time updates
   - Added 'single_event' support to webhook functionality for better event handling
   - Implemented webhook search panel with filtering capabilities for easier management
   - Added event field to webhook search panel and configuration options
   - Enhanced bot trigger validation with improved button assignment verification
   - Added support for conditional text generation in bot responses
   - Implemented 'sub_source' parameter to sendBotResponse for better tracking
   - Added option to check chat status after REST API calls

3. File Management and Image Processing
   - Added HEIC image conversion support in verifyaccess.php for modern image formats
   - Implemented file download restrictions and settings to mail conversation module
   - Enhanced image verification process with re-verification features
   - Added modal display for attached image files with better user experience
   - Implemented resize support for form files to optimize storage and performance
   - Added option to download files inline with modal interface
   - Enhanced file extension detection and validation for security
   - Added fallback options when browser cannot render images
   - Implemented option to ignore specific image files during verification
   - Added resize functionality for large mail message screenshots

4. Chat System and Message Handling
   - Added system message indicating when chat was accepted by operator
   - Enhanced image handling and conditions in the chat system
   - Implemented separate events for messages added via incoming webhooks
   - Added loading spinner overlay to main widget for better user feedback
   - Enhanced form submission experience with spinner on submit button
   - Added option to inherit start chat form settings for consistency
   - Improved message handling with better error display and validation
   - Enhanced chat search capabilities with message ID search functionality
   - Added support for raw file embed syntax in chat messages
   - Implemented conditional text generation for dynamic responses

5. Security and Performance Improvements
   - Implemented strict locking mechanisms for critical operations
   - Added transaction handling for operator transfers and chat attribute updates
   - Enhanced permission checking in export functions for better security
   - Implemented proper transaction handling for icon operations
   - Added cache clearing mechanisms for improved performance
   - Enhanced error handling for failed file downloads and operations
   - Implemented audit log truncation option from back office
   - Added better logging for auto assignment operations and error tracking
   - Enhanced REST API with option to skip empty body requests

6. User Interface and Experience Enhancements
   - Enhanced department assignment functionality with improved UI feedback
   - Added 'user-select-none' class to labels for better user experience
   - Implemented lazy load option for widget theme optimization
   - Added argument titles to command execution for better clarity
   - Enhanced form styling with improved input field appearance
   - Added link to documentation for better user guidance
   - Updated React app version with enhanced network failure handling
   - Improved checkbox re-enabling logic after request completion
   - Added nowrap styling for department group lists for better display

7. System Maintenance and Bug Fixes
   - Fixed issue #2298, #2304, #2305, #2306 addressing various system bugs
   - Updated dependencies and php-imap reference for security and compatibility
   - Enhanced error handling for non-existing users in reports
   - Fixed replacement process and edge case scenarios
   - Improved file type validation and extension setting for known formats
   - Fixed undefined display issues in pending wait time calculations
   - Enhanced aggregation queries by removing duplicates for better performance
   - Updated default translations for better internationalization support

execute doc/update_db/update_339.sql for update

**Full Changelog**: https://github.com/LiveHelperChat/livehelperchat/compare/4.70v...4.71v