feat: add multi-file type support for Gemini and Claude

- Add file data DTO for structured file handling
- Implement file decoder service
- Update Claude and Gemini relay channels to handle various file types
- Reorganize worker service to cf_worker for clarity
- Update token counter and image service for new file types

relay/channel/claude/relay-claude.go

@@ -225,9 +225,12 @@ func RequestOpenAI2ClaudeMessage(textRequest dto.GeneralOpenAIRequest) (*ClaudeR
 						// 判断是否是url
 						if strings.HasPrefix(imageUrl.Url, "http") {
 							// 是url，获取图片的类型和base64编码的数据
-							mimeType, data, _ := service.GetImageFromUrl(imageUrl.Url)
-							claudeMediaMessage.Source.MediaType = mimeType
-							claudeMediaMessage.Source.Data = data
+							fileData, err := service.GetFileBase64FromUrl(imageUrl.Url)
+							if err != nil {
+								return nil, fmt.Errorf("get file base64 from url failed: %s", err.Error())
+							}
+							claudeMediaMessage.Source.MediaType = fileData.MimeType
+							claudeMediaMessage.Source.Data = fileData.Base64Data
 						} else {
 							_, format, base64String, err := service.DecodeBase64ImageData(imageUrl.Url)
 							if err != nil {

relay/channel/gemini/relay-gemini.go

@@ -192,11 +192,14 @@ func CovertGemini2OpenAI(textRequest dto.GeneralOpenAIRequest) (*GeminiChatReque
 				// 判断是否是url
 				if strings.HasPrefix(part.ImageUrl.(dto.MessageImageUrl).Url, "http") {
 					// 是url，获取图片的类型和base64编码的数据
-					mimeType, data, _ := service.GetImageFromUrl(part.ImageUrl.(dto.MessageImageUrl).Url)
+					fileData, err := service.GetFileBase64FromUrl(part.ImageUrl.(dto.MessageImageUrl).Url)
+					if err != nil {
+						return nil, fmt.Errorf("get file base64 from url failed: %s", err.Error())
+					}
 					parts = append(parts, GeminiPart{
 						InlineData: &GeminiInlineData{
-							MimeType: mimeType,
-							Data:     data,
+							MimeType: fileData.MimeType,
+							Data:     fileData.Base64Data,
 						},
 					})
 				} else {

relay/relay-text.go

@@ -230,7 +230,7 @@ func getPromptTokens(textRequest *dto.GeneralOpenAIRequest, info *relaycommon.Re
 	var err error
 	switch info.RelayMode {
 	case relayconstant.RelayModeChatCompletions:
-		promptTokens, err = service.CountTokenChatRequest(*textRequest, textRequest.Model)
+		promptTokens, err = service.CountTokenChatRequest(info, *textRequest)
 	case relayconstant.RelayModeCompletions:
 		promptTokens, err = service.CountTokenInput(textRequest.Prompt, textRequest.Model)
 	case relayconstant.RelayModeModerations: