[2026-03-06][feat][general] Implement variable insertion and highlighting in textareas for scheduled messages and connection greetings/farewells.

👤 Author : Dapanel
🌿 Branch : main
🔗 Commit : 7a17a6e
📅 Date : 2026-03-06
📝 Note :
feat: Implement variable insertion and highlighting in textareas for scheduled messages and connection greetings/farewells.