v3.11.7: fix MODELS dict crash in _auto_detect_vision_fallback

src/translate-proxy.py

@@ -868,6 +868,10 @@ def _auto_detect_vision_fallback(target_url, api_key, models):
         chat_url = base + "/v1/chat/completions"
     vision_model = ""
     for m in (models or []):
+        if isinstance(m, dict):
+            m = m.get("name", m.get("id", str(m)))
+        if not isinstance(m, str):
+            continue
         ml = m.lower()
         if any(kw in ml for kw in _VISION_MODEL_KEYWORDS):
             vision_model = m