feat: status dropdown on task detail page

tests/test_api.py

@@ -233,3 +233,44 @@ def test_audit_apply_wrong_project(client):
                     json={"task_ids": ["WRONG-001"]})
     assert r.status_code == 200
     assert r.json()["count"] == 0
+
+
+# ---------------------------------------------------------------------------
+# PATCH /api/tasks/{task_id} — смена статуса
+# ---------------------------------------------------------------------------
+
+def test_patch_task_status(client):
+    """PATCH должен обновить статус и вернуть задачу."""
+    r = client.patch("/api/tasks/P1-001", json={"status": "review"})
+    assert r.status_code == 200
+    data = r.json()
+    assert data["status"] == "review"
+    assert data["id"] == "P1-001"
+
+
+def test_patch_task_status_persisted(client):
+    """После PATCH повторный GET должен возвращать новый статус."""
+    client.patch("/api/tasks/P1-001", json={"status": "blocked"})
+    r = client.get("/api/tasks/P1-001")
+    assert r.status_code == 200
+    assert r.json()["status"] == "blocked"
+
+
+@pytest.mark.parametrize("status", ["pending", "in_progress", "review", "done", "blocked"])
+def test_patch_task_all_valid_statuses(client, status):
+    """Все 5 допустимых статусов должны приниматься."""
+    r = client.patch("/api/tasks/P1-001", json={"status": status})
+    assert r.status_code == 200
+    assert r.json()["status"] == status
+
+
+def test_patch_task_invalid_status(client):
+    """Недопустимый статус → 400."""
+    r = client.patch("/api/tasks/P1-001", json={"status": "flying"})
+    assert r.status_code == 400
+
+
+def test_patch_task_not_found(client):
+    """Несуществующая задача → 404."""
+    r = client.patch("/api/tasks/NOPE-999", json={"status": "done"})
+    assert r.status_code == 404