fix(KAN-14): preserve template inheritance and project data

app/Http/Controllers/ProjectController.php

@@ -161,7 +161,7 @@ class ProjectController extends Controller
         $areas = array_values(Arr::get($validated, 'areas', array_keys($configuration)));
         $statusReplacements = Arr::get($validated, 'status_replacements', []);
 
-        $this->updateProjectTemplateLink->reset(
+        $blockedAreas = $this->updateProjectTemplateLink->reset(
             $project->load('projectTemplate'),
             $areas,
             $statusReplacements,
@@ -171,6 +171,10 @@ class ProjectController extends Controller
             ? "Selected settings were reset to the {$template->name} template."
             : "{$project->name} was reset to the {$template->name} template baseline.";
 
+        if ($blockedAreas !== []) {
+            $status = 'Some settings remain overridden because tickets or other configuration still use them.';
+        }
+
         return back()->with('status', $status);
     }
 

app/Http/Controllers/ProjectTemplateController.php

@@ -3,9 +3,12 @@
 namespace App\Http\Controllers;
 
 use App\Actions\Projects\CreateProjectTemplate;
+use App\Actions\Projects\DeleteProjectTemplate;
 use App\Actions\Projects\DuplicateProjectConfiguration;
+use App\Actions\Projects\ProjectConfigurationIdentity;
 use App\Actions\Projects\UpdateProjectTemplate;
 use App\Http\Requests\StoreProjectTemplateRequest;
+use App\Http\Requests\StoreStandaloneProjectTemplateRequest;
 use App\Http\Requests\UpdateProjectTemplateRequest;
 use App\Http\Resources\ProjectResource;
 use App\Http\Resources\ProjectTemplateResource;
@@ -20,6 +23,7 @@ class ProjectTemplateController extends Controller
 {
     public function __construct(
         private readonly CreateProjectTemplate $createProjectTemplate,
+        private readonly DeleteProjectTemplate $deleteProjectTemplate,
         private readonly UpdateProjectTemplate $updateProjectTemplate,
     ) {}
 
@@ -38,6 +42,22 @@ class ProjectTemplateController extends Controller
         ]);
     }
 
+    public function createEmpty(ProjectConfigurationIdentity $identity): Response
+    {
+        return Inertia::render('project-templates/Create', [
+            'copyAreaOptions' => DuplicateProjectConfiguration::copyAreaOptions(),
+            'project' => null,
+            'initialConfiguration' => $identity->defaults(),
+        ]);
+    }
+
+    public function storeEmpty(StoreStandaloneProjectTemplateRequest $request): RedirectResponse
+    {
+        $template = $this->createProjectTemplate->empty($request->validated());
+
+        return to_route('project-templates.edit', $template)->with('status', "Template {$template->name} was created.");
+    }
+
     public function edit(ProjectTemplate $projectTemplate): Response
     {
         abort_if(! $projectTemplate->is_published, 404);
@@ -81,7 +101,7 @@ class ProjectTemplateController extends Controller
         abort_if(! $projectTemplate->is_published, 404);
 
         $templateName = $projectTemplate->name;
-        $projectTemplate->delete();
+        $this->deleteProjectTemplate->handle($projectTemplate);
 
         return to_route('project-templates.index')
             ->with('status', "Template {$templateName} was deleted.");