feat(project): add icons and improve persistent volume management

Add project icon storage and serving with local/S3 support, prevent deletion of compose-managed volumes, and optimize volume backups. Refine project and backup UI components with consistent styling and coverage.

app/Http/Controllers/ProjectIconController.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\Project;
+use App\Services\ProjectIconStorageService;
+use Illuminate\Http\Response;
+
+class ProjectIconController extends Controller
+{
+    public function __invoke(string $project_uuid, ProjectIconStorageService $iconStorage): Response
+    {
+        $project = Project::ownedByCurrentTeam()->where('uuid', $project_uuid)->firstOrFail();
+        $contents = $iconStorage->projectContents($project);
+
+        abort_if($contents === null, 404);
+
+        return response($contents)->header('Content-Type', 'image/jpeg');
+    }
+}