feat: add bundle info copy action

[limichange]

Summary

• add a copy action beside the download button in the dev bundle list
• copy the CI bundle version, branch, PR title, and build number as readable text
• keep the copy action available across bundle download and active states

Why

Bundle metadata previously had to be selected and assembled manually when sharing or debugging a specific development bundle.

Impact

This affects the developer-only bundle switcher. Pressing the new button copies the selected bundle metadata and uses the existing clipboard success feedback.

Root cause

The bundle list exposed download and switch actions but had no dedicated way to copy the identifying metadata for a bundle.

Validation

• yarn agent:check --profile commit
• yarn install --immutable
• yarn agent:check --profile pr