✨ feat(gemini): add imageConfig field to GeminiChatRequest for flexible image configuration

dto/gemini.go

@@ -2,11 +2,12 @@ package dto
 
 import (
 	"encoding/json"
-	"github.com/gin-gonic/gin"
 	"one-api/common"
 	"one-api/logger"
 	"one-api/types"
 	"strings"
+
+	"github.com/gin-gonic/gin"
 )
 
 type GeminiChatRequest struct {
@@ -273,6 +274,7 @@ type GeminiChatGenerationConfig struct {
 	ResponseModalities []string              `json:"responseModalities,omitempty"`
 	ThinkingConfig     *GeminiThinkingConfig `json:"thinkingConfig,omitempty"`
 	SpeechConfig       json.RawMessage       `json:"speechConfig,omitempty"` // RawMessage to allow flexible speech config
+	ImageConfig        json.RawMessage       `json:"imageConfig,omitempty"`  // RawMessage to allow flexible image config
 }
 
 type MediaResolution string