Fix the bug where the Claude API does not return the DONE SSE message.

response.py

@@ -90,6 +90,7 @@ async def fetch_gemini_response_stream(client, url, headers, payload, model):
             function_full_response = json.dumps(function_call["functionCall"]["args"])
             sse_string = await generate_sse_response(timestamp, model, content=None, tools_id="chatcmpl-9inWv0yEtgn873CxMBzHeCeiHctTV", function_call_name=None, function_call_content=function_full_response)
             yield sse_string
+        yield "data: [DONE]\n\r"
 
 async def fetch_vertex_claude_response_stream(client, url, headers, payload, model):
     timestamp = datetime.timestamp(datetime.now())
@@ -136,6 +137,7 @@ async def fetch_vertex_claude_response_stream(client, url, headers, payload, mod
             function_full_response = json.dumps(function_call["input"])
             sse_string = await generate_sse_response(timestamp, model, content=None, tools_id=function_call_id, function_call_name=None, function_call_content=function_full_response)
             yield sse_string
+        yield "data: [DONE]\n\r"
 
 async def fetch_gpt_response_stream(client, url, headers, payload, max_redirects=5):
     redirect_count = 0
@@ -234,6 +236,7 @@ async def fetch_claude_response_stream(client, url, headers, payload, model):
                         function_call_content = delta["partial_json"]
                         sse_string = await generate_sse_response(timestamp, model, None, None, None, function_call_content)
                         yield sse_string
+        yield "data: [DONE]\n\r"
 
 async def fetch_response(client, url, headers, payload):
     response = await client.post(url, headers=headers, json=payload)