Summary

When a spawned sub-agent completes (progress reaches 100%), the response is not displayed to the user.

Steps to Reproduce

1. Spawn a sub-agent (e.g., reviewer) for a task
2. Progress indicator shows (e.g., "🔍 Reviewer 41%" → 100%)
3. Agent completes but no response is rendered

Expected Behavior

After sub-agent reaches 100%, the final response/findings should be displayed in the chat.

Current Behavior

Progress indicator reaches 100%, then nothing — response is missing.

Environment

• Webchat UI
• Sub-agent: reviewer
• Task: Security audit of codebase

Related

• Feature: Progress indicator for sub-agent execution #1903 (Progress indicator for sub-agent execution)
• UI: Make [SPAWN:agent] indicator more visible #1907 (Make SPAWN indicator more visible)

Context

User spawned reviewer agent for security analysis. Progress showed 41% → (presumably 100%), but final response never appeared.