optimize cleanup search query shop api extends

src/Controller/AskSseController.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace App\Controller;
 
 use App\Agent\AgentRunner;
+use App\Context\ContextService;
 use App\Http\ClientIdResolver;
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Request;
@@ -19,6 +20,7 @@ final readonly class AskSseController
     public function __construct(
         private AgentRunner $agentRunner,
         private ClientIdResolver $clientIdResolver,
+        private ContextService $contextService,
         private string $projectDir,
     ) {
     }
@@ -166,15 +168,39 @@ final readonly class AskSseController
                 $this->sendData($chunk);
             }
         } catch (\Throwable $e) {
+            $message = 'Stream abgebrochen: ' . $this->formatThrowableForClient($e);
             $this->sendEvent(
                 'error',
-                '❌ Stream abgebrochen: ' . $this->formatThrowableForClient($e)
+                '❌ ' . $message
             );
+
+            if ($prompt !== '' && $clientId !== '') {
+                $this->appendHistoryFailure($clientId, $prompt, $message);
+            }
         }
 
         $this->sendEvent('done', '[DONE]');
     }
 
+    private function appendHistoryFailure(string $clientId, string $prompt, string $message): void
+    {
+        try {
+            $message = trim(preg_replace('/\s+/u', ' ', $message) ?? $message);
+
+            if ($message === '') {
+                $message = 'Unbekannter Streamfehler.';
+            }
+
+            $this->contextService->appendHistory(
+                $clientId,
+                $prompt,
+                'Systemhinweis: Antwort konnte nicht abgeschlossen werden. Ursache: ' . $message
+            );
+        } catch (\Throwable) {
+            // History persistence must never break the SSE error response.
+        }
+    }
+
     private function registerStreamShutdownErrorHandler(): void
     {
         register_shutdown_function(function (): void {