fix(agent): include app display fields in published references (#37485)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/fields/agent_fields.py

@@ -44,7 +44,11 @@ class AgentConfigSnapshotSummaryResponse(ResponseModel):
 class AgentPublishedReferenceResponse(ResponseModel):
     app_id: str
     app_name: str
+    app_icon_type: str | None = None
+    app_icon: str | None = None
+    app_icon_background: str | None = None
     app_mode: str
+    app_updated_at: int | None = None
     workflow_id: str
     workflow_version: str
     node_ids: list[str] = Field(default_factory=list)