diff --git a/sim/cluster0/nginx/apps-port80.conf b/sim/cluster0/nginx/apps-port80.conf
index e9e814e..cf0bd8a 100644
--- a/sim/cluster0/nginx/apps-port80.conf
+++ b/sim/cluster0/nginx/apps-port80.conf
@@ -108,7 +108,16 @@ server {
 		fastcgi_param SCRIPT_FILENAME /var/www/ac/composed/backend/public/api/upload.php;
 		fastcgi_param SCRIPT_NAME /app/androidcast_project/issues/api/upload.php;
 		fastcgi_param REQUEST_URI $request_uri;
-		client_max_body_size 4m;
+		client_max_body_size 16m;
+	}
+
+	location = /app/androidcast_project/issues/api/ticket_attachments.php {
+		include fastcgi_params;
+		fastcgi_pass 127.0.0.1:9000;
+		fastcgi_param SCRIPT_FILENAME /var/www/ac/composed/backend/public/api/ticket_attachments.php;
+		fastcgi_param SCRIPT_NAME /app/androidcast_project/issues/api/ticket_attachments.php;
+		fastcgi_param REQUEST_URI $request_uri;
+		client_max_body_size 16m;
 	}
 
 	location ^~ /app/androidcast_project/issues/ {
@@ -117,7 +126,7 @@ server {
 		fastcgi_param SCRIPT_FILENAME /var/www/ac/composed/backend/public/index.php;
 		fastcgi_param SCRIPT_NAME /app/androidcast_project/issues/index.php;
 		fastcgi_param REQUEST_URI $request_uri;
-		client_max_body_size 4m;
+		client_max_body_size 16m;
 	}
 
 	# Legacy /crashes/ → 301 to /issues/ (SPEC §7)
@@ -137,6 +146,15 @@ server {
 		return 301 $public_scheme://$http_host/app/androidcast_project/issues/api/upload.php;
 	}
 
+	# Legacy heartbeat — serve POST in-place (301 redirect drops body; old apps poll type:ra here).
+	location = /app/androidcast_project/crashes/api/heartbeat.php {
+		include fastcgi_params;
+		fastcgi_pass 127.0.0.1:9000;
+		fastcgi_param SCRIPT_FILENAME /var/www/ac/composed/backend/public/api/heartbeat.php;
+		fastcgi_param SCRIPT_NAME /app/androidcast_project/issues/api/heartbeat.php;
+		fastcgi_param REQUEST_URI /app/androidcast_project/issues/api/heartbeat.php;
+	}
+
 	location ^~ /app/androidcast_project/graphs/assets/ {
 		alias /var/www/ac/composed/backend/public/assets/;
 	}