feat: add final verification screen capture and update response structure

tests/test_agent_tools.py

@@ -67,8 +67,13 @@ def test_task_complete_captures_return_and_data(tmp_path: Path, monkeypatch) ->
     assert result["ok"] is True
     assert result["return"] == "Task completed successfully"
     assert result["data"] == "file1\nfile2"
+    assert result["verification"]["ok"] is True
+    verification_path = Path(result["verification"]["path"])
+    assert verification_path.exists()
+    assert verification_path.name.startswith("screen_final_verification_step_")
     assert agent.final_result == "Task completed successfully"
     assert agent.final_data == "file1\nfile2"
+    assert agent.final_verification is not None
 
 
 def test_click_supports_directional_offsets(tmp_path: Path, monkeypatch) -> None:

tests/test_cli.py

@@ -35,6 +35,7 @@ def test_cli_emits_structured_return_and_data(monkeypatch: Any, capsys, tmp_path
             result="Done",
             return_message="Task completed successfully",
             data="file1.txt\nfile2.txt",
+            verification={"ok": True, "path": "C:/tmp/final.png"},
             steps=3,
             started_at=10.0,
             ended_at=12.5,
@@ -66,3 +67,4 @@ def test_cli_emits_structured_return_and_data(monkeypatch: Any, capsys, tmp_path
     assert payload["response"]["data"] == "file1.txt\nfile2.txt"
     assert payload["return"] == "Task completed successfully"
     assert payload["data"] == "file1.txt\nfile2.txt"
+    assert payload["verification"] == {"ok": True, "path": "C:/tmp/final.png"}