Close lifecycle transition helper workplan

tests/test_lifecycle.py

@@ -7,6 +7,8 @@ from api.services.lifecycle import (
     should_activate_parent_for_active_tasks,
     should_activate_parent_for_task_start,
     status_value,
+    transition_task_status,
+    transition_workstream_status,
 )
 
 
@@ -66,3 +68,34 @@ def test_status_value_unwraps_enum_like_values():
         value = "In_Progress"
 
     assert status_value(Status()) == "in_progress"
+
+
+def test_transition_workstream_status_normalizes_aliases():
+    class Workstream:
+        status = "todo"
+
+    ws = Workstream()
+    result = transition_workstream_status(ws, "done")
+
+    assert ws.status == "finished"
+    assert result.previous_status == "ready"
+    assert result.target_status == "finished"
+    assert result.changed is True
+
+
+def test_transition_task_status_activates_parent_once():
+    class Task:
+        status = "todo"
+
+    class Workstream:
+        status = "ready"
+
+    task = Task()
+    ws = Workstream()
+    result = transition_task_status(task, "in_progress", parent_workstream=ws)
+
+    assert task.status == "in_progress"
+    assert ws.status == "active"
+    assert result.parent_activated is True
+    assert result.previous_status == "todo"
+    assert result.target_status == "in_progress"