feat: support amazon nova

relay/channel/aws/dto.go

@@ -34,3 +34,56 @@ func copyRequest(req *dto.ClaudeRequest) *AwsClaudeRequest {
 		Thinking:         req.Thinking,
 	}
 }
+
+// Nova模型使用messages-v1格式
+type NovaMessage struct {
+	Role    string        `json:"role"`
+	Content []NovaContent `json:"content"`
+}
+
+type NovaContent struct {
+	Text string `json:"text"`
+}
+
+type NovaRequest struct {
+	SchemaVersion   string              `json:"schemaVersion"`
+	Messages        []NovaMessage       `json:"messages"`
+	InferenceConfig NovaInferenceConfig `json:"inferenceConfig,omitempty"`
+}
+
+type NovaInferenceConfig struct {
+	MaxTokens   int     `json:"maxTokens,omitempty"`
+	Temperature float64 `json:"temperature,omitempty"`
+	TopP        float64 `json:"topP,omitempty"`
+}
+
+// 转换OpenAI请求为Nova格式
+func convertToNovaRequest(req *dto.GeneralOpenAIRequest) *NovaRequest {
+	novaMessages := make([]NovaMessage, len(req.Messages))
+	for i, msg := range req.Messages {
+		novaMessages[i] = NovaMessage{
+			Role:    msg.Role,
+			Content: []NovaContent{{Text: msg.StringContent()}},
+		}
+	}
+
+	novaReq := &NovaRequest{
+		SchemaVersion: "messages-v1",
+		Messages:      novaMessages,
+	}
+
+	// 设置推理配置
+	if req.MaxTokens != 0 || (req.Temperature != nil && *req.Temperature != 0) || req.TopP != 0 {
+		if req.MaxTokens != 0 {
+			novaReq.InferenceConfig.MaxTokens = int(req.MaxTokens)
+		}
+		if req.Temperature != nil && *req.Temperature != 0 {
+			novaReq.InferenceConfig.Temperature = *req.Temperature
+		}
+		if req.TopP != 0 {
+			novaReq.InferenceConfig.TopP = req.TopP
+		}
+	}
+
+	return novaReq
+}