refactor(task): 重构异步任务处理流程

common/util/json.go

@@ -227,3 +227,24 @@ func MergeConsult(req map[string]any, messages map[string]any, extendMapping map
 	}
 	return result
 }
+
+// GetUserMessage 获取用户消息
+func GetUserMessage(taskReq map[string]any) map[string]any {
+	// 先取 requestPayload
+	rp, ok := taskReq["requestPayload"].(map[string]any)
+	if !ok {
+		return nil
+	}
+	// 再取 messages
+	messages, ok := rp["messages"].([]any)
+	if !ok {
+		return nil
+	}
+	for _, msg := range messages {
+		m, ok := msg.(map[string]any)
+		if ok && m["role"] == "user" {
+			return m
+		}
+	}
+	return nil
+}