Fix MTR API path: nginx rewrites diag_path prefix, backend accepts full paths

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

assets/diagnostics/mtr-backend.py

@@ -187,7 +187,7 @@ class Handler(BaseHTTPRequestHandler):
 
     def do_POST(self):
         parsed = urlparse(self.path)
-        if parsed.path not in ("/mtr", "/api/mtr"):
+        if not (parsed.path in ("/mtr", "/api/mtr") or parsed.path.endswith("/api/mtr")):
             self._send_json(404, {"error": "not found"})
             return
 

x-ui-latest.sh

@@ -462,7 +462,7 @@ server {
     location ^~ ${diag_path}api/mtr {
         limit_req  zone=diag_api burst=2 nodelay;
         limit_conn per_ip 2;
-        proxy_pass         http://127.0.0.1:${mtr_backend_port};
+        proxy_pass         http://127.0.0.1:${mtr_backend_port}/api/mtr;
         proxy_http_version 1.1;
         proxy_set_header   X-Real-IP       \$remote_addr;
         proxy_set_header   X-Forwarded-For \$proxy_add_x_forwarded_for;