fix(kanban): preserve dashboard completion summaries

tests/hermes_cli/test_kanban_core_functionality.py

@@ -1389,6 +1389,48 @@ def test_cli_complete_with_summary_and_metadata(kanban_home):
     assert r.metadata == {"files": 3}
 
 
+def test_cli_edit_backfills_result_on_done_task(kanban_home):
+    conn = kb.connect()
+    try:
+        tid = kb.create_task(conn, title="x", assignee="worker")
+        kb.complete_task(conn, tid)
+    finally:
+        conn.close()
+
+    meta = '{"source": "dashboard-recovery"}'
+    out = run_slash(
+        "edit " + tid
+        + " --result \"DECIDED: done\""
+        + " --summary \"DECIDED: done\""
+        + " --metadata '" + meta + "'"
+    )
+
+    assert "Edited" in out
+    conn = kb.connect()
+    try:
+        task = kb.get_task(conn, tid)
+        run = kb.latest_run(conn, tid)
+        events = kb.list_events(conn, tid)
+    finally:
+        conn.close()
+    assert task.result == "DECIDED: done"
+    assert run.summary == "DECIDED: done"
+    assert run.metadata == {"source": "dashboard-recovery"}
+    assert events[-1].kind == "edited"
+
+
+def test_cli_edit_rejects_non_done_task(kanban_home):
+    conn = kb.connect()
+    try:
+        tid = kb.create_task(conn, title="x", assignee="worker")
+    finally:
+        conn.close()
+
+    out = run_slash(f"edit {tid} --result nope")
+
+    assert "not done" in out
+
+
 def test_cli_complete_bad_metadata_exits_nonzero(kanban_home):
     conn = kb.connect()
     try: