test: cover credential-clearing and trailing-slash URL edge cases

Also fixes a missing trailing newline in SiteResource.php.

tests/Feature/Livewire/SitesTest.php

@@ -105,3 +105,17 @@ test('WordPress app password can be revealed and hidden in the table', function
         ->call('toggleReveal', $site->id)
         ->assertSet('revealedId', null);
 });
+
+test('switching a WordPress site to a non-WordPress cms_type clears its credentials', function () {
+    $site = Site::factory()->wordpress()->create(['wp_username' => 'admin']);
+
+    Livewire::test(Index::class)
+        ->call('edit', $site->id)
+        ->set('cmsType', 'custom')
+        ->call('save');
+
+    expect($site->fresh())
+        ->cms_type->toBe('custom')
+        ->wp_username->toBeNull()
+        ->wp_app_password->toBeNull();
+});

tests/Feature/PublishPostCommandTest.php

@@ -112,3 +112,28 @@ test('it marks the post as failed when the site is unreachable', function () {
 
     expect($post->fresh()->status)->toBe('failed');
 });
+
+test('it correctly builds the WordPress endpoint URL when the site URL has a trailing slash', function () {
+    Http::fake([
+        '*/wp-json/wp/v2/posts' => Http::response([
+            'id' => 42,
+            'link' => 'https://wp.example.com/2026/07/hello-world/',
+        ], 201),
+    ]);
+
+    $site = Site::factory()->wordpress()->create(['url' => 'https://wp.example.com/']);
+    $post = Post::factory()->create([
+        'site_id' => $site->id,
+        'type' => 'blog',
+        'title' => 'Hello World',
+        'body' => 'Post content',
+        'status' => 'draft',
+    ]);
+
+    $this->artisan('posts:publish', ['post' => $post->id])
+        ->assertExitCode(0);
+
+    Http::assertSent(function ($request) {
+        return $request->url() === 'https://wp.example.com/wp-json/wp/v2/posts';
+    });
+});