feat: VivesPOS landing on Winter CMS 1.2 — theme + plugin + Dockerfile

- Base: wintercms/winter branch 1.2 (full framework)
- Theme vivespos: Canvas 7 + Bootstrap 5 CDN, custom CSS
- Layout: deferred GTM/GA4 tracking, JSON-LD SoftwareApplication
- Partials: hero (offline-first), features, modes (offline/nube toggle),
  screenshots, pricing (3 planes), comparison, FAQ, CTA
- Plugin VivesPOS.Site with ContactForm
- Dockerfile: PHP 8.2 Apache, port 80, healthcheck
- Added winter/wn-pages, blog, sitemap, seo plugins
- Active theme set to vivespos

modules/system/tests/plugins/database/BelongsToModelTest.php

@@ -0,0 +1,103 @@
+<?php
+
+namespace System\Tests\Plugins\Database;
+
+use System\Tests\Bootstrap\PluginTestCase;
+use Database\Tester\Models\Post;
+use Database\Tester\Models\Author;
+use Model;
+
+class BelongsToModelTest extends PluginTestCase
+{
+    public function setUp() : void
+    {
+        parent::setUp();
+
+        include_once base_path() . '/modules/system/tests/fixtures/plugins/database/tester/models/Post.php';
+        include_once base_path() . '/modules/system/tests/fixtures/plugins/database/tester/models/Author.php';
+
+        $this->runPluginRefreshCommand('Database.Tester');
+    }
+
+    public function testSetRelationValue()
+    {
+        Model::unguard();
+        $post = Post::create(['title' => "First post", 'description' => "Yay!!"]);
+        $author1 = Author::create(['name' => 'Stevie', 'email' => 'stevie@example.com']);
+        $author2 = Author::create(['name' => 'Louie', 'email' => 'louie@example.com']);
+        $author3 = Author::make(['name' => 'Charlie', 'email' => 'charlie@example.com']);
+        Model::reguard();
+
+        // Set by Model object
+        $post->author = $author1;
+        $this->assertEquals($author1->id, $post->author_id);
+        $this->assertEquals('Stevie', $post->author->name);
+
+        // Set by primary key
+        $post->author = $author2->id;
+        $this->assertEquals($author2->id, $post->author_id);
+        $this->assertEquals('Louie', $post->author->name);
+
+        // Nullify
+        $post->author = null;
+        $this->assertNull($post->author_id);
+        $this->assertNull($post->author);
+
+        // Deferred in memory
+        $post->author = $author3;
+        $this->assertEquals('Charlie', $post->author->name);
+        $this->assertNull($post->author_id);
+        $author3->save();
+        $this->assertEquals($author3->id, $post->author_id);
+    }
+
+    public function testGetRelationValue()
+    {
+        Model::unguard();
+        $author = Author::create(['name' => 'Stevie']);
+        $post = Post::make(['title' => "First post", 'author_id' => $author->id]);
+        Model::reguard();
+
+        $this->assertEquals($author->id, $post->getRelationValue('author'));
+    }
+
+    public function testDeferredBinding()
+    {
+        $sessionKey = uniqid('session_key', true);
+
+        Model::unguard();
+        $post = Post::make(['title' => "First post"]);
+        $author = Author::create(['name' => 'Stevie']);
+        Model::reguard();
+
+        // Deferred add
+        $post->author()->add($author, $sessionKey);
+        $this->assertNull($post->author_id);
+        $this->assertNull($post->author);
+
+        $this->assertEquals(0, $post->author()->count());
+        $this->assertEquals(1, $post->author()->withDeferred($sessionKey)->count());
+
+        // Commit deferred
+        $post->save(null, $sessionKey);
+        $this->assertEquals(1, $post->author()->count());
+        $this->assertEquals($author->id, $post->author_id);
+        $this->assertEquals('Stevie', $post->author->name);
+
+        // New session
+        $sessionKey = uniqid('session_key', true);
+
+        // Deferred remove
+        $post->author()->remove($author, $sessionKey);
+        $this->assertEquals(1, $post->author()->count());
+        $this->assertEquals(0, $post->author()->withDeferred($sessionKey)->count());
+        $this->assertEquals($author->id, $post->author_id);
+        $this->assertEquals('Stevie', $post->author->name);
+
+        // Commit deferred
+        $post->save(null, $sessionKey);
+        $this->assertEquals(0, $post->author()->count());
+        $this->assertNull($post->author_id);
+        $this->assertNull($post->author);
+    }
+}