Ollama: think=False is coerced to None (falls back to self.thinking) in chat/stream_chat/achat/astream_chat

该报错发生在 LlamaIndex 的 Ollama 集成中,当调用 `chat`/`stream_chat`/`achat`/`astream_chat` 方法并传入 `think=False` 时,该参数被内部逻辑错误地忽略,导致仍然返回思考模型的推理 token。优先排查并修复 `llama-






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