TWP - Translate Web Pages with DeepLX от XXXR

🚀 New Features

Multi-Service Load Balancing
1. Multiple Endpoints Support: Configure multiple DeepLX API endpoints with load balancing
2. Load Balancing Strategies: Random, Round-Robin, and Weighted distribution algorithms
3. Automatic Failover: Smart switching between endpoints when one fails
4. Service Health Monitoring: Real-time status tracking with visual indicators

Enhanced Testing System
1. Auto-Test on Add: New endpoints automatically tested before saving
2. Manual Testing: "Test" button for each configured endpoint
3. Edit-Time Validation: Endpoints tested when being updated
4. Smart Duplicate Prevention: Blocks duplicate URL+Token combinations

Improved User Interface
1. Status Badges: Visual error indicators with HTTP status codes
2. Change Detection: Update button only enabled when changes are made
3. Auto-Clear Messages: Success/error messages disappear automatically
4. Compact Layout: Optimized display for multiple endpoints

🐛 Bug Fixes
Load Balancing Issues
1. HTTP Status Handling: Fixed 401/500 errors not triggering failover
2. Round-Robin Algorithm: Corrected service selection when endpoints are excluded
3. Service Management: Fixed permanent vs temporary service removal logic

UI/UX Improvements
1. Memory Leaks: Fixed event listener cleanup in form change detection
2. Message Persistence: Fixed success messages not auto-clearing
3. Button States: Corrected disabled button behavior in edit mode
4. Code Duplication: Eliminated redundant testing implementations

Configuration Management
1. State Persistence: Error states now properly saved across sessions
2. Validation Logic: Improved URL and authentication token validation
3. Service Synchronization: Fixed inconsistencies between UI and background processes

🔧 Technical Improvements
1. DeepLXLoadBalancer Class: New load balancing engine
2. Error Classification: Permanent vs temporary error detection
3. Performance Optimization: Reduced code redundancy and improved algorithms
4. Event Management: Better memory management for form interactions