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app.py

@@ -39,6 +39,25 @@ PARSEC_CONTEXT_AFTER = 1600
 API_KEY = os.getenv("OPENAI_API_KEY", "").strip()
 client = OpenAI(api_key=API_KEY) if API_KEY else None
 
+# ----------------------------
+# Gradio state helpers
+# Keep state as a JSON STRING to avoid schema issues on Hugging Face.
+# ----------------------------
+def state_load(st_json: str) -> Dict[str, Any]:
+    try:
+        if not st_json:
+            return {}
+        return json.loads(st_json) if isinstance(st_json, str) else {}
+    except Exception:
+        return {}
+
+def state_dump(st: Dict[str, Any]) -> str:
+    try:
+        return json.dumps(st or {}, ensure_ascii=False)
+    except Exception:
+        return "{}"
+
+
 
 # ============================
 # Helpers