Implement debug_mode for email delivery (vibe-kanban f32190a0)

The EmailDeliveryConfig in api/core/workflow/nodes/human\_input/entities.py has a field `debug_mode`. When this field is set to `True` in `node_data`, the test run (InvokeFrom.DEBUGGER) and the delivery test should only sent test emails to the current user, instead of sending to the specified recipients.

Please implement this logic, write correspond test cases to ensure that the logic works as expected.

api/tests/unit_tests/services/workflow/test_workflow_human_input_delivery.py

@@ -3,6 +3,7 @@ from types import SimpleNamespace
 from unittest.mock import MagicMock
 
 import pytest
+from sqlalchemy.orm import sessionmaker
 
 from core.workflow.enums import NodeType
 from core.workflow.nodes.human_input.entities import (
@@ -11,11 +12,16 @@ from core.workflow.nodes.human_input.entities import (
     EmailRecipients,
     ExternalRecipient,
     HumanInputNodeData,
+    MemberRecipient,
 )
 from services import workflow_service as workflow_service_module
 from services.workflow_service import WorkflowService
 
 
+def _make_service() -> WorkflowService:
+    return WorkflowService(session_maker=sessionmaker())
+
+
 def _build_node_config(delivery_methods):
     node_data = HumanInputNodeData(
         title="Human Input",
@@ -28,7 +34,7 @@ def _build_node_config(delivery_methods):
     return {"id": "node-1", "data": node_data}
 
 
-def _make_email_method(enabled: bool = True) -> EmailDeliveryMethod:
+def _make_email_method(enabled: bool = True, debug_mode: bool = False) -> EmailDeliveryMethod:
     return EmailDeliveryMethod(
         id=uuid.uuid4(),
         enabled=enabled,
@@ -39,12 +45,13 @@ def _make_email_method(enabled: bool = True) -> EmailDeliveryMethod:
             ),
             subject="Test subject",
             body="Test body",
+            debug_mode=debug_mode,
         ),
     )
 
 
 def test_human_input_delivery_requires_draft_workflow():
-    service = WorkflowService()
+    service = _make_service()
     service.get_draft_workflow = MagicMock(return_value=None)  # type: ignore[method-assign]
     app_model = SimpleNamespace(tenant_id="tenant-1", id="app-1")
     account = SimpleNamespace(id="account-1")
@@ -59,7 +66,7 @@ def test_human_input_delivery_requires_draft_workflow():
 
 
 def test_human_input_delivery_rejects_disabled_method():
-    service = WorkflowService()
+    service = _make_service()
     delivery_method = _make_email_method(enabled=False)
     node_config = _build_node_config([delivery_method])
     workflow = MagicMock()
@@ -79,7 +86,7 @@ def test_human_input_delivery_rejects_disabled_method():
 
 
 def test_human_input_delivery_dispatches_to_test_service(monkeypatch: pytest.MonkeyPatch):
-    service = WorkflowService()
+    service = _make_service()
     delivery_method = _make_email_method(enabled=True)
     node_config = _build_node_config([delivery_method])
     workflow = MagicMock()
@@ -105,3 +112,40 @@ def test_human_input_delivery_dispatches_to_test_service(monkeypatch: pytest.Mon
     )
 
     test_service_instance.send_test.assert_called_once()
+
+
+def test_human_input_delivery_debug_mode_overrides_recipients(monkeypatch: pytest.MonkeyPatch):
+    service = _make_service()
+    delivery_method = _make_email_method(enabled=True, debug_mode=True)
+    node_config = _build_node_config([delivery_method])
+    workflow = MagicMock()
+    workflow.get_node_config_by_id.return_value = node_config
+    service.get_draft_workflow = MagicMock(return_value=workflow)  # type: ignore[method-assign]
+    service._render_human_input_content_for_test = MagicMock(return_value="rendered")  # type: ignore[attr-defined]
+
+    test_service_instance = MagicMock()
+    monkeypatch.setattr(
+        workflow_service_module,
+        "HumanInputDeliveryTestService",
+        MagicMock(return_value=test_service_instance),
+    )
+
+    app_model = SimpleNamespace(tenant_id="tenant-1", id="app-1")
+    account = SimpleNamespace(id="account-1")
+
+    service.test_human_input_delivery(
+        app_model=app_model,
+        account=account,
+        node_id="node-1",
+        delivery_method_id=str(delivery_method.id),
+    )
+
+    test_service_instance.send_test.assert_called_once()
+    sent_method = test_service_instance.send_test.call_args.kwargs["method"]
+    assert isinstance(sent_method, EmailDeliveryMethod)
+    assert sent_method.config.debug_mode is True
+    assert sent_method.config.recipients.whole_workspace is False
+    assert len(sent_method.config.recipients.items) == 1
+    recipient = sent_method.config.recipients.items[0]
+    assert isinstance(recipient, MemberRecipient)
+    assert recipient.user_id == account.id