[2026-03-27][feat][general] Implement cursor-aware insertion for variables, shortcuts, and mentions in message input fields by tracking trigger position.

👤 Author : Matoraaa
🌿 Branch : main
🔗 Commit : 93f18f1
📅 Date : 2026-03-27
📝 Note :
feat: Implement cursor-aware insertion for variables, shortcuts, and mentions in message input fields by tracking trigger position.