fix: wrong thinking labels appear in non-thinking models (#861)

relay/channel/openai/adaptor.go

@@ -5,7 +5,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"github.com/gin-gonic/gin"
 	"io"
 	"mime/multipart"
 	"net/http"
@@ -23,6 +22,8 @@ import (
 	"one-api/relay/constant"
 	"one-api/service"
 	"strings"
+
+	"github.com/gin-gonic/gin"
 )
 
 type Adaptor struct {
@@ -48,6 +49,15 @@ func (a *Adaptor) ConvertClaudeRequest(c *gin.Context, info *relaycommon.RelayIn
 
 func (a *Adaptor) Init(info *relaycommon.RelayInfo) {
 	a.ChannelType = info.ChannelType
+
+	// initialize ThinkingContentInfo when thinking_to_content is enabled
+	if think2Content, ok := info.ChannelSetting[constant2.ChannelSettingThinkingToContent].(bool); ok && think2Content {
+		info.ThinkingContentInfo = relaycommon.ThinkingContentInfo{
+			IsFirstThinkingContent:  true,
+			SendLastThinkingContent: false,
+			HasSentThinkingContent:  false,
+		}
+	}
 }
 
 func (a *Adaptor) GetRequestURL(info *relaycommon.RelayInfo) (string, error) {