Refine runs table state layout

repub/jobs.py

@@ -1038,11 +1038,17 @@ def _project_completed_execution(
         if execution.ended_at is not None
         else None
     )
+    started_at = (
+        _coerce_datetime(cast(datetime | str, execution.started_at))
+        if execution.started_at is not None
+        else None
+    )
     return {
         "source": job.source.name,
         "slug": job.source.slug,
         "job_id": job_id,
         "execution_id": execution_id,
+        "duration": _format_duration(started_at, ended_at),
         "ended_at": (
             _humanize_relative_time(reference_time, ended_at)
             if ended_at is not None
@@ -1230,6 +1236,18 @@ def _humanize_relative_time(reference_time: datetime, target_time: datetime) ->
     return f"{absolute_delta_seconds} seconds ago"
 
 
+def _format_duration(
+    started_at: datetime | None, ended_at: datetime | None
+) -> str | None:
+    if started_at is None or ended_at is None:
+        return None
+
+    total_seconds = max(0, int((ended_at - started_at).total_seconds()))
+    hours, remainder = divmod(total_seconds, 60 * 60)
+    minutes, seconds = divmod(remainder, 60)
+    return f"{hours:02d}:{minutes:02d}:{seconds:02d}"
+
+
 def _find_live_workers() -> dict[int, LiveWorker]:
     proc_dir = Path("/proc")
     if not proc_dir.exists():