feat: 新增 Responses → ChatCompletions 协议降级兼容配置

common/constants.go

@@ -22,7 +22,7 @@ var TopUpLink = ""
 var themeValue atomic.Value // stores string; safe for concurrent read/write
 
 func init() {
-	themeValue.Store("classic")
+	themeValue.Store("default")
 }
 
 func GetTheme() string {

dto/openai_request.go

@@ -237,6 +237,7 @@ type FunctionRequest struct {
 	Description string `json:"description,omitempty"`
 	Name        string `json:"name"`
 	Parameters  any    `json:"parameters,omitempty"`
+	Strict      *bool  `json:"strict,omitempty"`
 	Arguments   string `json:"arguments,omitempty"`
 }