fix(select): prevent trigger class from leaking to dropdown content and items

[Momoyu404]

Issue for this PR

Closes #17545

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

The Select component was forwarding class/classList props to three elements: the trigger button, the dropdown content panel, and each item.

In prompt-input.tsx, the agent selector passes class="max-w-[160px]" to keep the trigger compact. This unintentionally capped the popup width at 160px too, clipping long agent names from plugins like GSD.

Fix: only apply classList to Kobalte.Trigger. The content and items don't need it — select.css already handles their sizing.

Changed file: packages/ui/src/components/select.tsx

How did you verify your code works?

Ran the app locally (bun dev in packages/app), opened a session with GSD agents loaded, and confirmed the dropdown now expands to show full agent names without clipping. Checked that settings page selects are unaffected.

Screenshots / recordings

Before:

After:

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

[Momoyu404]

Hi! Just wanted to follow up on this PR 😊
Let me know if any changes are needed!