fix: add missing component URLs in Component Maker (#4820)

* fix: missing component URLs

* add tags, gradient and icon to Custom Component Maker template

* Add descriptive error messages to project data assertions

---------

Co-authored-by: Gabriel Luiz Freitas Almeida <gabriel@langflow.org>

src/backend/tests/unit/test_initial_setup.py

@@ -38,14 +38,16 @@ def test_get_project_data():
             project_tags,
         ) = get_project_data(project)
         assert isinstance(project_gradient, str) or project_gradient is None
-        assert isinstance(project_tags, list)
-        assert isinstance(project_name, str)
-        assert isinstance(project_description, str)
-        assert isinstance(project_is_component, bool)
-        assert isinstance(updated_at_datetime, datetime)
-        assert isinstance(project_data, dict)
-        assert isinstance(project_icon, str) or project_icon is None
-        assert isinstance(project_icon_bg_color, str) or project_icon_bg_color is None
+        assert isinstance(project_tags, list), f"Project {project_name} has no tags"
+        assert isinstance(project_name, str), f"Project {project_name} has no name"
+        assert isinstance(project_description, str), f"Project {project_name} has no description"
+        assert isinstance(project_is_component, bool), f"Project {project_name} has no is_component"
+        assert isinstance(updated_at_datetime, datetime), f"Project {project_name} has no updated_at_datetime"
+        assert isinstance(project_data, dict), f"Project {project_name} has no data"
+        assert isinstance(project_icon, str) or project_icon is None, f"Project {project_name} has no icon"
+        assert (
+            isinstance(project_icon_bg_color, str) or project_icon_bg_color is None
+        ), f"Project {project_name} has no icon_bg_color"
 
 
 @pytest.mark.usefixtures("client")