Refine runs table state layout

tests/test_jobs.py

@@ -49,6 +49,40 @@ def test_load_runs_view_humanizes_completed_execution_summary_bytes(
     assert view["completed"][0]["stats"] == "14 requests • 11 items • 15.7 MiB"
 
 
+def test_load_runs_view_projects_completed_execution_duration(
+    tmp_path: Path,
+) -> None:
+    initialize_database(tmp_path / "jobs-completed-duration.db")
+    source = create_source(
+        name="Completed source",
+        slug="completed-source",
+        source_type="feed",
+        notes="",
+        spider_arguments="",
+        enabled=False,
+        cron_minute="*/5",
+        cron_hour="*",
+        cron_day_of_month="*",
+        cron_day_of_week="*",
+        cron_month="*",
+        feed_url="https://example.com/completed.xml",
+    )
+    job = Job.get(Job.source == source)
+    JobExecution.create(
+        job=job,
+        running_status=JobExecutionStatus.SUCCEEDED,
+        started_at=datetime(2026, 3, 30, 11, 59, 12, tzinfo=UTC),
+        ended_at=datetime(2026, 3, 30, 12, 0, tzinfo=UTC),
+    )
+
+    view = load_runs_view(
+        log_dir=tmp_path / "out" / "logs",
+        now=datetime(2026, 3, 30, 12, 30, tzinfo=UTC),
+    )
+
+    assert view["completed"][0]["duration"] == "00:00:48"
+
+
 def test_load_runs_view_humanizes_running_execution_summary_bytes(
     tmp_path: Path,
 ) -> None: