About: modern card, clickable mail/URL (TextBrowserInteraction + openExternalLinks), single-line values, link color via palette; layout reuse to avoid warnings.
Help: scrollable card; moved all styling to theme QSS; added Quick Start, Tips, Warnings, Troubleshooting sections.
Theme: added HELP/ABOUT blocks for light & dark; cast font sizes to int to prevent light-mode crashes; consolidated #aboutCard rules; link colors per theme.
Fix: removed setLayout(None) and avoided re-adding layouts to the same widget.
Kirubakaran
5d35b9a34d