Description

Add visual feedback indicators for Telegram interactions.

When a user assigns a big task to an agent via Telegram, it responds with an emoji but there are no indications that it's working in the background.

Details

• Show "typing..." status during processing
• Display streaming reasoning
• Better UX for long-running tasks

OpenFang Reference

• Original Issue: Visual feedback is essential for Telegram interactions RightNow-AI/openfang#571

Test Plan

• Send a long-running task via Telegram
• Verify typing indicator appears
• Verify response streams back to user