Fix NameError: append to window deque, not undefined all_entries

Agent-Logs-Url: https://github.com/CyberSecDef/NovelForge/sessions/147f948c-2221-4cd9-860c-498288b76c8d

Co-authored-by: CyberSecDef <17597068+CyberSecDef@users.noreply.github.com>

Author: Copilot

novelforge/__init__.py

@@ -245,7 +245,7 @@ def get_llm_log() -> Response:
                         continue
 
                     try:
-                        all_entries.append(json.loads(stripped))
+                        window.append(json.loads(stripped))
                     except json.JSONDecodeError:
                         # llm.log is treated as JSONL: one complete JSON object per
                         # non-empty line. Skip malformed/incomplete lines rather than