Fix: Configure base_url dynamically for MiniMax

This resolves the 401 Unauthorized/invalid api_id error by letting the MiniMax client default to api.minimax.io/v1 (like the model listing logic) or read a custom base_url from credentials.toml.

src/ai_client.py

@@ -2075,7 +2075,9 @@ def _list_minimax_models(api_key: str) -> list[str]:
  try:
   openai = _require_warmed("openai")
   OpenAI = openai.OpenAI
-  client = OpenAI(api_key=api_key, base_url="https://api.minimax.io/v1")
+  creds = _load_credentials()
+  base_url = creds.get("minimax", {}).get("base_url") or "https://api.minimax.io/v1"
+  client = OpenAI(api_key=api_key, base_url=base_url)
   models_list = client.models.list()
   found = [m.id for m in models_list]
   if found:
@@ -2138,7 +2140,8 @@ def _ensure_minimax_client() -> None:
   api_key = creds.get("minimax", {}).get("api_key")
   if not api_key:
    raise ValueError("MiniMax API key not found in credentials.toml")
-  _minimax_client = openai.OpenAI(api_key=api_key, base_url="https://api.minimax.chat/v1")
+  base_url = creds.get("minimax", {}).get("base_url") or "https://api.minimax.io/v1"
+  _minimax_client = openai.OpenAI(api_key=api_key, base_url=base_url)
 
 def _ensure_grok_client() -> Any:
  global _grok_client