User-question option text cannot be selected or copied

Description

User-question option text cannot be selected or copied in the browser UI.

The shared button style sets user-select: none, so option labels in the question dock are not selectable. Child-level overrides are insufficient; the option button itself needs user-select: text.

Expected: Users can drag-select and copy question option label text (e.g. Minimal).

Actual: Pointer drag does not select option text; window.getSelection() stays empty / non-selectable.

Plugins

None relevant.

OpenCode version

dev (local)

Steps to reproduce

1. Open a session in the app UI where a user-question request dock is shown (options with labels such as Minimal).
2. Attempt to select option label text with a physical mouse drag across the option.
3. Check whether the selection contains the option label (e.g. via window.getSelection()).

Screenshot and/or share link

Local verification evidence (plan):

• Focused Playwright E2E in packages/app/e2e/regression/session-request-docks.spec.ts performs a mouse drag across the option label and asserts selected text contains Minimal (after fix; pre-fix CSS blocks selection).
• Manual agent-browser verification: physical pointer drag selected Minimal in window.getSelection().
• Screenshot: /tmp/opencode/20260729_user-question-selection-verified.png (local path).

Root cause: shared button CSS user-select: none; scoped override needed on [data-slot="question-option"] in packages/session-ui/src/components/message-part.css.

Operating System

Linux

Terminal

N/A (browser UI)