add ai image base

ai_service/llm/adapter/deepseek.py

@@ -0,0 +1,17 @@
+from langchain_deepseek import ChatDeepSeek
+
+from llm.base import MultiModalAICapability
+
+
+class DeepSeekAdapter(MultiModalAICapability):
+    def __init__(self, api_key, model, **kwargs):
+
+        self.llm = ChatDeepSeek(api_key=api_key, model=model, streaming=True)
+
+    async def chat(self, messages, **kwargs):
+        # 兼容 DeepSeek 的调用方式
+        return await self.llm.ainvoke(messages)
+
+    async def stream_chat(self, messages, **kwargs):
+        async for chunk in self.llm.astream(messages):
+            yield chunk