[FEATURE]: Show directory in opencode session list output #17594

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Description

The opencode session list command shows session ID, title, and updated time, but does NOT include the directory field that tells users which directory each session was started from.
When a user has many sessions across different projects, they have no way to know which directory a session belongs to without running opencode export <sessionID> for each one.

Current behavior

Session ID Title Updated
─────────────────────────────────────────────────────────────────────────
ses_xxxx My session 2:36 PM

Expected behavior

Session ID Title Directory Updated
─────────────────────────────────────────────────────────────────────────────────
ses_xxxx My session /home/user/project 2:36 PM

Why this matters

• Users can't see which directory their previous sessions were in
• Hard to find sessions from a specific project when there are many
• Forces unnecessary export calls just to see basic context
• CLI session list should show the same information available in the session JSON (directory field)

Workaround

Currently users must run opencode export <sessionID> for each session to see the directory, or use opencode db if it supported session queries (it currently doesn't expose sessions table).