fix(server): tolerate malformed request logging

CHANGELOG.md

@@ -3,6 +3,12 @@
 
 ## [Unreleased]
 
+### Fixed
+
+- Malformed HTTP request logging now falls back to `"-"` for missing method or
+  path fields instead of raising an `AttributeError` traceback while handling
+  the 400 response.
+
 ## [v0.51.124] — 2026-05-24 — Release CV (stage-batch6 — 3-PR Windows-only stack — agent paths / docs / port hardening)
 
 ### Added

server.py

@@ -232,8 +232,8 @@ class Handler(BaseHTTPRequestHandler):
         duration_ms = round((time.time() - getattr(self, '_req_t0', time.time())) * 1000, 1)
         record = _json.dumps({
             'ts': time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime()),
-            'method': self.command or '-',
-            'path': self.path or '-',
+            'method': getattr(self, 'command', None) or '-',
+            'path': getattr(self, 'path', None) or '-',
             'status': int(code) if str(code).isdigit() else code,
             'ms': duration_ms,
         })

tests/test_issue2775_log_request.py

@@ -0,0 +1,18 @@
+import json
+
+from server import Handler
+
+
+def test_log_request_handles_malformed_request_without_path(capsys):
+    """Malformed request lines can call log_request before path is assigned."""
+    handler = Handler.__new__(Handler)
+    handler.command = None
+
+    Handler.log_request(handler, "400")
+
+    line = capsys.readouterr().out.strip()
+    assert line.startswith("[webui] ")
+    record = json.loads(line.removeprefix("[webui] "))
+    assert record["method"] == "-"
+    assert record["path"] == "-"
+    assert record["status"] == 400