1. Tab Navigation and UX Improvements
   - Added data-remember attribute to tab navigation elements across multiple templates for better state persistence
   - Implemented Safari browser support for tab navigation
   - Enhanced replaceable variables UI with remembered tabs functionality

2. Bot System Enhancements
   - Added 'Keep chat locked' option in bot action text to maintain chat lock from visitor messages
   - Refactored condition handling in bot workflow to support JSON parsing for dynamic conditions
   - Enhanced attribute filtering in bot action text with improved non-empty value processing
   - Updated CURL building UI for better usability

3. Mail Conversation System
   - Added signature fetching functionality with AJAX endpoint for improved email handling
   - Added button to append fetched signature to email templates
   - Enhanced input field layout for better usability and accessibility

4. Bot Conditions Form
   - Added datalist options for filter fields in conditions form with predefined options
   - Options include Chat ID, Status, Department ID, User ID, Email, Phone, Nickname, and Country Code

5. System and Configuration
   - Added ability to clear cache from command line
   - Implemented opcache cache clearing functionality
   - Added fallback if default config file is not found
   - Inform operator when external operator is writing messages

6. Performance Optimizations
   - Various performance optimizations in core components
   - Improved command title handling as argument
   - Enhanced proper checking mechanisms

7. Bug Fixes and Improvements
   - Removed unnecessary variable declarations
   - Various sync improvements

For update just follow standard update procedure. For manual update it's update_342.sql

## What's Changed
**Full Changelog**: https://github.com/LiveHelperChat/livehelperchat/compare/4.74v...4.75v