Do not change the project's selected state when updated through the API

lib/decidim/api/budget_mutation_type.rb

@@ -58,7 +58,7 @@ def update_project(id:, attributes:)
 
         enforce_permission_to :update, :project, project: project
 
-        form = project_form_from(attributes)
+        form = project_form_from(attributes, project)
         Decidim::Budgets::Admin::UpdateProject.call(form, project) do
           on(:ok) do
             return project
@@ -105,6 +105,7 @@ def project_form_from(attributes, project = nil)
         )
       end
 
+      # rubocop:disable Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity
       def project_params(attributes, project = nil)
         {
           "title" => attributes.title,
@@ -121,9 +122,11 @@ def project_params(attributes, project = nil)
           "idea_ids" => attributes.idea_ids || related_ids_for(project, :ideas),
           "plan_ids" => attributes.plan_ids || related_ids_for(project, :plans)
         }.tap do |attrs|
+          attrs["selected"] ||= project&.selected?
           attrs.merge!(attributes.main_image_attributes) if attributes.main_image_attributes
         end
       end
+      # rubocop:enable Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity
 
       def related_ids_for(project, resource)
         return [] unless project

spec/types/decidim/budgeting_pipeline/budget_mutation_type_spec.rb

@@ -78,6 +78,8 @@
         expect(project.linked_resources(:proposals, "included_proposals").map(&:id)).to match_array(proposals.map(&:id))
         expect(project.linked_resources(:ideas, "included_ideas").map(&:id)).to match_array(ideas.map(&:id))
         expect(project.linked_resources(:plans, "included_plans").map(&:id)).to match_array(plans.map(&:id))
+
+        expect(project.selected?).to be(false)
       end
 
       context "with a blob" do
@@ -171,6 +173,21 @@
         expect(project.linked_resources(:proposals, "included_proposals").map(&:id)).to match_array(proposals.map(&:id))
         expect(project.linked_resources(:ideas, "included_ideas").map(&:id)).to match_array(ideas.map(&:id))
         expect(project.linked_resources(:plans, "included_plans").map(&:id)).to match_array(plans.map(&:id))
+
+        expect(project.selected?).to be(false)
+      end
+
+      context "when the project is selected" do
+        before { project.update!(selected_at: Time.current) }
+
+        it "does not change the selected state" do
+          expect { response }.not_to change(Decidim::Budgets::Project, :count)
+
+          expect(response["updateProject"]).to eq("id" => project.id.to_s)
+          project.reload
+
+          expect(project.selected?).to be(true)
+        end
       end
 
       context "with a blob" do