fix(chat): prevent provider name clipping

[janburzinski]

Summary

Fixes ENG-1832 by keeping the provider/model trigger from shrinking and giving its clipped text label enough line height for descenders.

Root cause

The model selector could shrink under toolbar pressure, and its text label used a unit line height inside an overflow-clipped span, which cut off descenders such as g.

screenshot

after:

[greptile-apps]

Greptile Summary

This PR adjusts the chat composer model selector so provider names stay readable.

• Adds a non-shrinking trigger class for the model selector.
• Applies that class to the combobox trigger.
• Increases the clipped model label line height for descenders.

Confidence Score: 5/5

This looks safe to merge after a small layout cleanup.

• The change is limited to chat composer presentation.
• The only issue found is a narrow-toolbar overflow case for long provider/model labels.
• No blocking functional or security issues were found in the changed code.

packages/ui/src/react/components/chat-composer/chat-composer.css.ts

Important Files Changed

Filename	Overview
packages/ui/src/react/components/chat-composer/chat-composer.css.ts	Adds a model trigger style that prevents the selector from shrinking.
packages/ui/src/react/components/chat-composer/index.tsx	Applies the new trigger style and increases the clipped label line height.

Prompt To Fix All With AI

Fix the following 1 code review issue. Work through them one at a time, proposing concise fixes.

---

### Issue 1 of 1
packages/ui/src/react/components/chat-composer/chat-composer.css.ts:204
**Model Trigger Stops Ellipsis**

When the composer is narrow or the selected provider/model name is long, `flexShrink: 0` keeps the trigger at its content width. That prevents the existing clipped label from shrinking enough to ellipsize, so the toolbar can overflow or push other controls out of the row instead of truncating the model name.

_{Reviews (1): Last reviewed commit: "fix(chat): avoid clipping model label de..." | Re-trigger Greptile}

[arnestrickmann]

thanks!