[Bug]: user messages can split streaming text

[rbren]

Operating System

macOS

Installation Method

npm (npx @openhands/agent-canvas or npm install -g @openhands/agent-canvas)

Agent Canvas Version

1.5.2

Bug Description

i sent a message during streaming, and it ended up in the middle of the message

Steps to Reproduce

send a message while streaming is happening

Actual Behavior

split

Expected Behavior

message appears below streaming text; new text streams in above the message

Relevant Logs

Screenshots

No response

Additional Context

No response