[opencode-agent]

What

URLs in user message bubbles are now real links, so https://github.com/Hona/mesh in a prompt can be clicked instead of copied by hand.

• http(s):// URLs in the plain-text segments of a user message render as <a target="_blank" rel="noopener noreferrer">. The desktop window-open handler already sends these to the system browser; on web they open in a new tab, the same as assistant markdown links.
• Trailing punctuation (, . ) ] and similar) stays outside the link, matching how tool output already extracts URLs.
• File and agent mentions keep their existing highlighting. URL detection only runs on the text between mentions.
• Links keep the bubble's text color with a soft underline that becomes solid on hover, so they're readable in dark, light and pending states.

Tests

• New links scenario in the Conversation timeline story.
• Component test checking link count, href, target, punctuation trimming, the mention, and that the full text content is unchanged.
• session-message-projection.spec.ts passes locally (7/7), and session-ui typecheck passes.

Before/after screenshots in dark and light themes were shared in the Slack thread.

Requested by: @neriousy (Filip via Slack)