Merge branch 'main' of https://github.com/Alalalallalalalalalalalal/Frontend

utils/api.py

@@ -337,7 +337,11 @@ def chat_ai(query: str, lesson_id: int, level_slug: str, history=None) -> str:
         "history": history or [],
     }
     try:
-        d = _json_or_raise(_req("POST", "/chat", json=payload))
+        # Force the full path without relying on _prefixes
+        url = f"{BACKEND}/chat"  # make sure BACKEND has no trailing slash
+        r = _session.post(url, json=payload, timeout=DEFAULT_TIMEOUT)
+        r.raise_for_status()
+        d = r.json()
         return d.get("answer", "")
     except Exception as e:
         return f"(chat failed: {e})"