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.

tests/Feature/ButtonHeightConsistencyTest.php

@@ -0,0 +1,11 @@
+<?php
+
+it('uses the standard button height inside application forms and workspaces', function () {
+    $utilities = file_get_contents(resource_path('css/utilities.css'));
+    $applicationStyles = file_get_contents(resource_path('css/app.css'));
+
+    expect($utilities)->toContain('px-2.5 h-9 min-h-9')
+        ->and($applicationStyles)
+        ->not->toContain('.application-settings-workspace .button')
+        ->not->toContain('.application-settings-form .button');
+});