fix: theme('asset', path, name) 忽略指定主题的 bug

theme() 辅助函数 asset 分支只传了路径，丢弃第二个参数（主题名），导致主题管理页所有卡片都显示激活主题的截图。修复透传，并补回归测试

app/Support/helpers.php

@@ -24,7 +24,7 @@ if (! function_exists('theme')) {
         $manager = app(ThemeManager::class);
 
         return match ($method) {
-            'asset' => $manager->assetUrl($args[0] ?? ''),
+            'asset' => $manager->assetUrl($args[0] ?? '', $args[1] ?? null),
             'var' => $manager->variable($args[0] ?? '', $args[1] ?? null),
             'vars' => $manager->variables(),
             'name' => $manager->active(),

tests/Feature/ThemeTest.php

@@ -59,4 +59,11 @@ class ThemeTest extends TestCase
         Setting::set('active_theme', 'does-not-exist');
         $this->get('/')->assertOk();
     }
+
+    public function test_theme_asset_url_respects_explicit_theme(): void
+    {
+        // 回归：theme('asset', path, name) 必须用指定主题，而不是激活主题（否则主题管理页所有卡片显示同一张图）
+        $this->assertStringContainsString('/themes/sablog/assets/screenshot.png', theme('asset', 'screenshot.png', 'sablog'));
+        $this->assertStringContainsString('/themes/modern/assets/screenshot.png', theme('asset', 'screenshot.png', 'modern'));
+    }
 }