fix: api-key manager cleanup and log error on llm call (#1077)

* fix: api-key manager cleanup and log error on llm call

* log improved

app/routes/api.enhancer.ts

@@ -107,7 +107,10 @@ async function enhancerAction({ context, request }: ActionFunctionArgs) {
     return new Response(result.textStream, {
       status: 200,
       headers: {
-        'Content-Type': 'text/plain; charset=utf-8',
+        'Content-Type': 'text/event-stream',
+        Connection: 'keep-alive',
+        'Cache-Control': 'no-cache',
+        'Text-Encoding': 'chunked',
       },
     });
   } catch (error: unknown) {