[Accessibility] VS Code extension: red/orange input border in Auto and Manual modes breaks focus

### Preflight Checklist

- [x] I have searched [existing issues](https://github.com/anthropics/claude-code/issues?q=is%3Aissue%20state%3Aopen%20label%3Abug) and this hasn't been reported yet
- [x] This is a single bug report (please file separate reports for different bugs)
- [x] I am using the latest version of Claude Code

### What's Wrong?

**Component:** VS Code extension (chat panel input)
**Version:** Claude Code extension 2.1.270, VS Code 1.135.0, Windows 10 Home 10.0.19045 (win32-x64)

**Issue**
Since a recent update, the chat input box is framed with a persistent saturated
red outline in Auto mode and an orange outline in Manual mode. The border stays
on the whole time the mode is active.

**Why this is an accessibility problem**
I'm autistic. A permanent, high-saturation red frame around the element I look
at all day is a constant sensory overload. Red and orange also read as "error" and
"warning", so the UI is effectively raising an alarm about a mode I selected
deliberately. The result is that I cannot focus on programming while the panel
is open. Both of the modes I actually use are affected, so there is no
colour-neutral option (you only left less useful modes with neutral, non-aggravating colors).

There is no setting to disable or recolour the border, and
workbench.colorCustomizations does not reach it.
This is a very important issue for me, since I cannot turn off my neurodivergence,
and the color is causing me an entirely avoidable (if you supplied ANY kind of customization)
anxiety. It is a very bad update.

Do not force distressing things on neurodivergent users.

**Expected**
A mode indicator that does not use alarm colours as a persistent frame.
Suggestions (any one would solve it):
- A setting to disable mode-coloured borders.
- A neutral or theme-derived border colour, with the mode shown by the
existing text label instead.
- Reduce the border to a transient cue (e.g. shown briefly on mode change).

**Steps to reproduce**
1. Open the Claude Code chat panel in VS Code.
2. Switch permission mode to Auto (or Manual).
3. Observe the input box outline.

### What Should Happen?

Do not show orange/red and cause me personal distress via constant sensory overload OR provide me with an option to customize colors. A neutral border, or a setting to disable mode-coloured borders. Any of the three suggestions above resolves it.

### Error Messages/Logs

```shell

```

### Steps to Reproduce

1. Open the Claude Code chat panel in VS Code.
2. Switch permission mode to Auto (or Manual).
3. Observe the input box outline.

### Claude Model

Not sure / Multiple models

### Is this a regression?

Yes, this worked in a previous version

### Last Working Version

2.1.266

### Claude Code Version

2.1.270

### Platform

Claude.ai / subscription

### Operating System

Windows

### Terminal/Shell

VS Code integrated terminal

### Additional Information

Previous version folder 2.1.266 is still on your disk, so I can confirm the regression window is between 2.1.266 and 2.1.270.