fix: fix omitted app icon_type updates (#33988)

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

api/tests/unit_tests/controllers/console/app/test_app_apis.py

@@ -7,14 +7,19 @@ from __future__ import annotations
 
 import uuid
 from types import SimpleNamespace
-from unittest.mock import MagicMock
+from unittest.mock import MagicMock, patch
 
 import pytest
+from pydantic import ValidationError
 from werkzeug.exceptions import BadRequest, NotFound
 
+from controllers.console import console_ns
 from controllers.console.app import (
     annotation as annotation_module,
 )
+from controllers.console.app import (
+    app as app_module,
+)
 from controllers.console.app import (
     completion as completion_module,
 )
@@ -203,6 +208,48 @@ class TestCompletionEndpoints:
                 method(app_model=MagicMock(id="app-1"))
 
 
+class TestAppEndpoints:
+    """Tests for app endpoints."""
+
+    def test_app_put_should_preserve_icon_type_when_payload_omits_it(self, app, monkeypatch):
+        api = app_module.AppApi()
+        method = _unwrap(api.put)
+        payload = {
+            "name": "Updated App",
+            "description": "Updated description",
+            "icon": "🤖",
+            "icon_background": "#FFFFFF",
+        }
+        app_service = MagicMock()
+        app_service.update_app.return_value = SimpleNamespace()
+        response_model = MagicMock()
+        response_model.model_dump.return_value = {"id": "app-1"}
+
+        monkeypatch.setattr(app_module, "AppService", lambda: app_service)
+        monkeypatch.setattr(app_module.AppDetailWithSite, "model_validate", MagicMock(return_value=response_model))
+
+        with (
+            app.test_request_context("/console/api/apps/app-1", method="PUT", json=payload),
+            patch.object(type(console_ns), "payload", payload),
+        ):
+            response = method(app_model=SimpleNamespace(icon_type=app_module.IconType.EMOJI))
+
+        assert response == {"id": "app-1"}
+        assert app_service.update_app.call_args.args[1]["icon_type"] is None
+
+    def test_update_app_payload_should_reject_empty_icon_type(self):
+        with pytest.raises(ValidationError):
+            app_module.UpdateAppPayload.model_validate(
+                {
+                    "name": "Updated App",
+                    "description": "Updated description",
+                    "icon_type": "",
+                    "icon": "🤖",
+                    "icon_background": "#FFFFFF",
+                }
+            )
+
+
 # ========== OpsTrace Tests ==========
 class TestOpsTraceEndpoints:
     """Tests for ops_trace endpoint."""