fix: content=None 导致 TypeError + /v1/models 本地返回

ai/huawei_gateway.py

@@ -306,7 +306,7 @@ def auto_compact(raw_body, real_token, orig_request):
     MAX_MSG_CHARS = 500
     truncated_msgs = []
     for m in convo_msgs:
-        content = m.get('content', '')
+        content = m.get('content', '') or ''
         if len(content) > MAX_MSG_CHARS:
             truncated_msgs.append({**m, 'content': content[:MAX_MSG_CHARS] + '...[截断]'})
         else:
@@ -816,6 +816,15 @@ def proxy(subpath):
 
     target_url = f'https://{TARGET_HOST}/v2/{subpath}'
 
+    # ============ /models 请求直接返回，不转发上游 ============
+    if subpath in ('models', 'models/'):
+        return {
+            "object": "list",
+            "data": [
+                {"id": "glm-5.1", "object": "model", "owned": "zhipu"},
+            ]
+        }
+
     # ============ 请求体处理：大小校验 + 动态超时 ============
     raw_body = request.get_data()
     body_size = len(raw_body)