feat: implement new handlers for audio, image, embedding, and responses processing

- Added new handlers: AudioHelper, ImageHelper, EmbeddingHelper, and ResponsesHelper to manage respective requests.
- Updated ModelMappedHelper to accept request parameters for better model mapping.
- Enhanced error handling and validation across new handlers to ensure robust request processing.
- Introduced support for new relay formats in relay_info and updated relevant functions accordingly.

relay/common/relay_info.go

@@ -34,9 +34,14 @@ type ClaudeConvertInfo struct {
 }
 
 const (
-	RelayFormatOpenAI = "openai"
-	RelayFormatClaude = "claude"
-	RelayFormatGemini = "gemini"
+	RelayFormatOpenAI          = "openai"
+	RelayFormatClaude          = "claude"
+	RelayFormatGemini          = "gemini"
+	RelayFormatOpenAIResponses = "openai_responses"
+	RelayFormatOpenAIAudio     = "openai_audio"
+	RelayFormatOpenAIImage     = "openai_image"
+	RelayFormatRerank          = "rerank"
+	RelayFormatEmbedding       = "embedding"
 )
 
 type RerankerInfo struct {
@@ -143,6 +148,7 @@ func GenRelayInfoClaude(c *gin.Context) *RelayInfo {
 func GenRelayInfoRerank(c *gin.Context, req *dto.RerankRequest) *RelayInfo {
 	info := GenRelayInfo(c)
 	info.RelayMode = relayconstant.RelayModeRerank
+	info.RelayFormat = RelayFormatRerank
 	info.RerankerInfo = &RerankerInfo{
 		Documents:       req.Documents,
 		ReturnDocuments: req.GetReturnDocuments(),
@@ -150,9 +156,25 @@ func GenRelayInfoRerank(c *gin.Context, req *dto.RerankRequest) *RelayInfo {
 	return info
 }
 
+func GenRelayInfoOpenAIAudio(c *gin.Context) *RelayInfo {
+	info := GenRelayInfo(c)
+	info.RelayFormat = RelayFormatOpenAIAudio
+	return info
+}
+
+func GenRelayInfoEmbedding(c *gin.Context) *RelayInfo {
+	info := GenRelayInfo(c)
+	info.RelayFormat = RelayFormatEmbedding
+	return info
+}
+
 func GenRelayInfoResponses(c *gin.Context, req *dto.OpenAIResponsesRequest) *RelayInfo {
 	info := GenRelayInfo(c)
 	info.RelayMode = relayconstant.RelayModeResponses
+	info.RelayFormat = RelayFormatOpenAIResponses
+
+	info.SupportStreamOptions = false
+
 	info.ResponsesUsageInfo = &ResponsesUsageInfo{
 		BuiltInTools: make(map[string]*BuildInToolInfo),
 	}
@@ -175,6 +197,19 @@ func GenRelayInfoResponses(c *gin.Context, req *dto.OpenAIResponsesRequest) *Rel
 	return info
 }
 
+func GenRelayInfoGemini(c *gin.Context) *RelayInfo {
+	info := GenRelayInfo(c)
+	info.RelayFormat = RelayFormatGemini
+	info.ShouldIncludeUsage = false
+	return info
+}
+
+func GenRelayInfoImage(c *gin.Context) *RelayInfo {
+	info := GenRelayInfo(c)
+	info.RelayFormat = RelayFormatOpenAIImage
+	return info
+}
+
 func GenRelayInfo(c *gin.Context) *RelayInfo {
 	channelType := c.GetInt("channel_type")
 	channelId := c.GetInt("channel_id")
@@ -243,10 +278,6 @@ func GenRelayInfo(c *gin.Context) *RelayInfo {
 	if streamSupportedChannels[info.ChannelType] {
 		info.SupportStreamOptions = true
 	}
-	// responses 模式不支持 StreamOptions
-	if relayconstant.RelayModeResponses == info.RelayMode {
-		info.SupportStreamOptions = false
-	}
 	return info
 }