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.

database/migrations/2026_08_13_140035_add_icon_columns_to_projects_table.php

@@ -0,0 +1,31 @@
+<?php
+
+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) {
+            $table->string('icon_path')->nullable();
+            $table->string('icon_storage_type')->nullable();
+            $table->foreignId('icon_s3_storage_id')->nullable()->constrained('s3_storages')->nullOnDelete();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('projects', function (Blueprint $table) {
+            $table->dropConstrainedForeignId('icon_s3_storage_id');
+            $table->dropColumn(['icon_path', 'icon_storage_type']);
+        });
+    }
+};