fix: make project template inheritance granular and safe

database/migrations/2026_06_05_161500_move_project_metadata_to_project_templates.php

@@ -44,13 +44,17 @@ return new class extends Migration
                 'projects.name',
                 'projects.project_template_id',
                 'project_templates.project_id as template_project_id',
+                'project_templates.is_published as template_is_published',
             ])
             ->get();
 
         foreach ($projects as $project) {
             $projectTemplateId = $project->project_template_id;
 
-            if ($projectTemplateId === null || (int) ($project->template_project_id ?? 0) !== (int) $project->id) {
+            if ($projectTemplateId === null || (
+                ! (bool) $project->template_is_published
+                && (int) ($project->template_project_id ?? 0) !== (int) $project->id
+            )) {
                 $projectTemplateId = DB::table('project_templates')->insertGetId([
                     'project_id' => $project->id,
                     'source_project_id' => $project->id,
@@ -88,7 +92,7 @@ return new class extends Migration
 
             $projectModel = Project::query()->find($project->id);
 
-            if ($projectModel !== null) {
+            if ($projectModel !== null && ! (bool) $project->template_is_published) {
                 DB::table('project_templates')
                     ->where('id', $projectTemplateId)
                     ->update([

database/migrations/2026_09_08_091101_add_template_override_tracking_to_projects_table.php

@@ -0,0 +1,63 @@
+<?php
+
+use App\Actions\Projects\DuplicateProjectConfiguration;
+use App\Models\Project;
+use App\Models\ProjectTemplate;
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('projects', function (Blueprint $table): void {
+            $table->json('template_overrides')->default('[]')->after('project_template_id');
+        });
+
+        $configuration = app(DuplicateProjectConfiguration::class);
+
+        ProjectTemplate::query()->eachById(function (ProjectTemplate $template) use ($configuration): void {
+            $template->forceFill([
+                'copy_areas' => $configuration->normalizeCopyAreas($template->copy_areas ?? []),
+                'configuration_snapshot' => $configuration->normalizeConfiguration(
+                    $template->configuration_snapshot ?? [],
+                ),
+            ])->saveQuietly();
+        });
+
+        Project::query()
+            ->whereHas('projectTemplate', fn ($query) => $query->where('is_published', true))
+            ->with('projectTemplate')
+            ->eachById(function (Project $project) use ($configuration): void {
+                $templateConfiguration = $configuration->normalizeConfiguration(
+                    $project->projectTemplate?->configuration_snapshot ?? [],
+                );
+                $areas = array_values(array_unique([
+                    ...array_keys($templateConfiguration),
+                    ...DuplicateProjectConfiguration::copyableAreas(),
+                ]));
+                $currentConfiguration = $configuration->export($project, $areas);
+                $overrides = collect($areas)
+                    ->filter(fn (string $area): bool => ! array_key_exists($area, $templateConfiguration)
+                        || ($currentConfiguration[$area] ?? null) !== $templateConfiguration[$area])
+                    ->values()
+                    ->all();
+
+                $project->forceFill(['template_overrides' => $overrides])->saveQuietly();
+            });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('projects', function (Blueprint $table): void {
+            $table->dropColumn('template_overrides');
+        });
+    }
+};