Enter / send message button goes out of the screen over time

Before submitting your bug report

• I've tried finding an answer on the Continue docs site
• I'm not able to find an open issue that reports the same bug
• I've seen the troubleshooting guide on the Continue Docs

Relevant environment info

- OS: Linux
- Continue version: 2.0.0
- IDE version: 1.128.0 x64
- config:
  
  name: OpenAI compatible provider
  version: 0.0.1
  schema: v1

  models:
    - name: claude-sonnet-5
      provider: openai
      model: claude-sonnet-5
      apiBase: https://api.openai-compatible-provider.com/v1
      apiKey: API_KEY
  ...

Description

Hey,

The "Enter" button goes out of screen over time. Resizing the chatbox window does not fix the problem. Also, when the AI messages are long, the button disappears as it entirely move to the right, and the textbox's width is increased.
This behavior persists even on VSCode's "Primary side bar" and "Panel".

To reproduce

No response

Log output

Start by reproducing the issue in VS Code 1.128.0 on Linux with Continue 2.0.0, using long AI messages in both the Primary side bar and Panel. Confirm that the Enter button remains visible and the textbox does not expand horizontally; no source file or test is identified in the report.