feat(#138): add device model dropdown in preview model

database/migrations/2026_01_08_173521_add_kind_to_device_models_table.php

@@ -0,0 +1,33 @@
+<?php
+
+use App\Models\DeviceModel;
+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('device_models', function (Blueprint $table) {
+            $table->string('kind')->nullable()->index();
+        });
+
+        // Set existing og_png and og_plus to kind "trmnl"
+        DeviceModel::whereIn('name', ['og_png', 'og_plus'])->update(['kind' => 'trmnl']);
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('device_models', function (Blueprint $table) {
+            $table->dropIndex(['kind']);
+            $table->dropColumn('kind');
+        });
+    }
+};