* fix(cmd-j): rank empty-query worktrees by focus recency
Persist a per-worktree focus-recency timestamp and use it as the primary
ordering signal for Cmd+J's empty-query Worktrees section, so SSH and
other quiet worktrees surface based on user focus rather than background
activity. See docs/cmd-j-empty-query-ordering.md.
Co-authored-by: Orca <help@stably.ai>
* fix(tests): guard lastVisitedAtByWorktreeId and mock markWorktreeVisited
Co-authored-by: Orca <help@stably.ai>
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Co-authored-by: Orca <help@stably.ai>
