no message

app/Http/Controllers/RobotsController.php

@@ -8,19 +8,18 @@ class RobotsController extends Controller
 {
     public function index(): Response
     {
-        $sContent = implode("\n", [
-            'User-agent: *',
-            'Allow: /',
-            'Disallow: /admin/',
-            'Disallow: /api/',
-            'Disallow: /storage/',
-            'Disallow: /vendor/',
-            'Disallow: /test/',
-            'Disallow: /*?*',
-            'Sitemap: ' . config('app.url') . '/sitemap.xml',
-        ]);
+        $sContent = "User-agent: *\n";
+        $sContent .= "Allow: /\n";
+        $sContent .= "Disallow: /admin/\n";
+        $sContent .= "Disallow: /api/\n";
+        $sContent .= "Disallow: /storage/\n";
+        $sContent .= "Disallow: /vendor/\n";
+        $sContent .= "Disallow: /test/\n";
+        $sContent .= "Disallow: /*?*\n\n";
+        $sContent .= "Sitemap: " . config('app.url') . "/sitemap.xml\n";
 
+        // 核心修复：强制指定 text/plain 响应头
         return response($sContent, 200)
-            ->header('Content-Type', 'text/plain');
+            ->header('Content-Type', 'text/plain; charset=utf-8');
     }
 }