feat(features): edición de elementos + catálogo de tipos de elemento

- Migración: tabla feature_types + columnas feature_type_id (FK) e is_active en features.
  Modelo FeatureType; Feature gana featureType() + casts is_active.
- Catálogo de tipos (FeatureTypeManager, ruta /feature-types): CRUD con modal
  (nombre, descripción, color), contador de usos; gateado por edit layers.
- Editor de elementos del proyecto (FeatureManager, ruta projects.features):
  tabla Rappasoft ProjectFeaturesTable (filtros nombre/capa/tipo en cabecera),
  toggle activo/inactivo y borrado individual; modal para editar nombre/tipo/activo.
- Acceso: botón "Elementos" en el dashboard del proyecto (edit layers) y enlace a
  "Tipos de elemento" desde el editor.

Tests: FeatureManagementTest (6). Suite 87 passing.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

database/migrations/2026_06_25_100000_create_feature_types_and_link_features.php

@@ -0,0 +1,36 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('feature_types', function (Blueprint $table) {
+            $table->id();
+            $table->string('name')->unique();
+            $table->string('description')->nullable();
+            $table->string('color', 7)->default('#6b7280');
+            $table->timestamps();
+            $table->softDeletes();
+        });
+
+        Schema::table('features', function (Blueprint $table) {
+            $table->foreignId('feature_type_id')->nullable()->after('template_id')
+                ->constrained('feature_types')->nullOnDelete();
+            $table->boolean('is_active')->default(true)->after('status');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('features', function (Blueprint $table) {
+            $table->dropConstrainedForeignId('feature_type_id');
+            $table->dropColumn('is_active');
+        });
+
+        Schema::dropIfExists('feature_types');
+    }
+};