feat(F-139): completed feature

project/apps/admin/src/app/api/[...path]/route.ts

@@ -19,13 +19,17 @@ export async function GET(req: NextRequest) {
       headers: { Cookie: cookies },
     });
     if (path === 'admin/logs/stream') {
+      // Pipe SSE directly: Next.js App Router supports ReadableStream passthrough.
+      // X-Accel-Buffering: no tells any intermediate proxy (nginx) not to buffer.
+      const headers = new Headers();
+      headers.set('Content-Type', backendRes.headers.get('content-type') ?? 'text/event-stream');
+      headers.set('Cache-Control', 'no-cache, no-store, must-revalidate');
+      headers.set('X-Accel-Buffering', 'no');
+      // Do NOT set Connection: keep-alive — it is HTTP/1.1 default for persistent
+      // connections and can confuse proxies that do not expect streaming.
       return new Response(backendRes.body, {
         status: backendRes.status,
-        headers: {
-          'Content-Type': backendRes.headers.get('content-type') ?? 'text/event-stream',
-          'Cache-Control': backendRes.headers.get('cache-control') ?? 'no-cache',
-          Connection: 'keep-alive',
-        },
+        headers,
       });
     }
     const data = await backendRes.json().catch(() => null);