* feat(stats): add avg turn duration and messages per turn to averages card
Adds two new metrics to the workspace stats Averages card: mean turn
duration and mean message count per turn. Both exclude outliers — turns
shorter than 1s (no-op/aborted), longer than 1h (zombie turns where
completed_at was backfilled across an agent restart), and turns with no
messages — so the displayed means reflect typical work rather than tail
skew. On a ~4k-turn sample the filter drops avg duration from ~1062s to
~289s.
* fix(stats): exclude exact 1h turns and use Tooltip for averages help text
Address PR feedback: the BETWEEN bound was inclusive so turns exactly at
the 1h ceiling were retained, contradicting the documented half-open
range. Also swap the title attribute on the new Averages rows for the
shared Tooltip component so the help text is reachable via keyboard and
screen readers.
* fix(stats): align turn-row zero state with em-dash convention
Address PR feedback: avg_messages_per_turn rendered "0.0" while
avg_turn_duration_ms rendered "—" under the same empty-data condition.
Also corrects the GetGlobalStats docstring to acknowledge that
clean_turn_agg adds one correlated per-turn lookup on top of the four
single-scan CTEs.
* test(stats): cover exact 1h turn boundary in clean-turn exclusion test
Add a turn of exactly 3,600,000ms (cleanTurnMaxDurationMs) to
TestGetGlobalStats_CleanTurnExcludesOutliers so the exclusive upper
bound is exercised directly, not just via the 2h zombie turn that
sits well above the boundary.
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Co-authored-by: Kandev Agent <agent@kandev.dev>
João Salavisa
672f2b1f26