test sse fixes

src/app/routes/api/events.$.ts

@@ -37,13 +37,22 @@ export const Route = createFileRoute("/api/events/$")({
                   clearInterval(pingInterval);
                   return;
                 }
-                const pingMessage = `data: ${JSON.stringify({ type: "ping" })}\n\n`;
+                const pingMessage = `data: ${JSON.stringify({ type: "ping", timestamp: Date.now() })}\n\n`;
                 controller.enqueue(new TextEncoder().encode(pingMessage));
               } catch (e) {
                 logger.error("ServerEvents | Ping interval error", e);
                 clearInterval(pingInterval);
               }
-            }, 30000);
+            }, 15000);
+
+            setTimeout(() => {
+              try {
+                const heartbeatMessage = `data: ${JSON.stringify({ type: "heartbeat", timestamp: Date.now() })}\n\n`;
+                controller.enqueue(new TextEncoder().encode(heartbeatMessage));
+              } catch (e) {
+                logger.error("ServerEvents | Heartbeat error", e);
+              }
+            }, 1000);
 
             const cleanup = () => {
               serverEvents.off("test", handleEvent);
@@ -63,6 +72,9 @@ export const Route = createFileRoute("/api/events/$")({
             "Access-Control-Allow-Origin": "*",
             "Access-Control-Allow-Headers": "Cache-Control",
             "X-Accel-Buffering": "no",
+            "X-Proxy-Buffering": "no",
+            "Proxy-Buffering": "off",
+            "Transfer-Encoding": "chunked",
           },
         });
       },