chore(admin-ui): tokenise topnav hover highlight with primary tint

tests/Feature/AdminComponentsCssTopnavHoverShouldUsePrimaryTintTokenTest.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminComponentsCssTopnavHoverShouldUsePrimaryTintTokenTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function loginAsPlatformAdmin(): void
+    {
+        $this->seed();
+
+        $this->post('/admin/login', [
+            'email' => 'platform.admin@demo.local',
+            'password' => 'Platform@123456',
+        ])->assertRedirect('/admin');
+    }
+
+    public function test_admin_components_css_topnav_hover_should_use_primary_tint_token(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $css = file_get_contents(public_path('css/admin-components.css'));
+        $this->assertIsString($css);
+
+        // 顶部导航 hover 高亮必须走 primary tint token，避免散落 rgba 硬编码。
+        $this->assertStringContainsString('.topnav-link:hover', $css);
+        $this->assertStringContainsString('background:var(--adm-primary-tint-08', $css);
+    }
+}