[JS][compat-oai] when streaming gpt-5.5 produces empty toolRequest model chunks #5374

data: {"message":{"modelChunk":{"role":"model","index":0,"content":[{"toolRequest":{"name":"list_files","ref":"call_xJ5bxWQkf0db5DTaE3ryZDtG","input":""}}]}}}

data: {"message":{"modelChunk":{"role":"model","index":0,"content":[{"toolRequest":{"input":""}}]}}}

data: {"message":{"modelChunk":{"role":"model","index":0,"content":[{"toolRequest":{"input":""}}]}}}

data: {"message":{"modelChunk":{"role":"model","index":0,"content":[{"toolRequest":{"input":""}}]}}}

data: {"message":{"modelChunk":{"role":"model","index":0,"content":[{"toolRequest":{"input":""}}]}}}

data: {"message":{"modelChunk":{"role":"model","index":0,"content":[{"toolRequest":{"input":""}}]}}}

data: {"message":{"modelChunk":{"role":"model","index":0,"content":[{"toolRequest":{"input":""}}]}}}

data: {"message":{"modelChunk":{"role":"model","index":0,"content":[{"toolRequest":{"input":""}}]}}}

data: {"message":{"modelChunk":{"role":"model","index":0,"content":[{"toolRequest":{"input":""}}]}}}