traincode

v4.2.4: Add HTML length debugging to Serial Monitor - Add debug output to show HTML length when serving main page and source endpoint - Helps troubleshoot HTML generation issues without scrolling through full HTML - Maintains all existing functionality while adding debugging capability

v4.2.3: Add /source endpoint for raw HTML debugging - Add new /source endpoint that returns raw HTML source code - Set content type to text/plain for browser source view - Enables easier troubleshooting of HTML/CSS/JS issues - Maintains all existing functionality while adding debugging capability

v4.2.2: Reorganize System Status section in Firmware tab - Move System Status section above Device Management for better logical flow - Improve user experience: firmware management → system status → device operations - Maintains all existing functionality while improving organization

v4.2.1: Implement GPIO pin sorting in device control panel - Sort devices by GPIO pin number instead of by device type - Active devices displayed first in GPIO order - Unused pins displayed second in GPIO order - Maintains all existing functionality and device controls