fix: use session list filter result instead of discarding it

[usvimal]

Summary

• The pipe() result filtering archived sessions and sorting by update time was computed but never assigned or returned
• The original unfiltered sessions array was returned instead, causing duplicate/archived sessions to appear

Changes

• Assign the pipe() result to sessions variable
• Return the filtered and sorted result

Testing

• Session list should now only show non-archived sessions
• Sessions should be sorted by most recently updated first