feat(Sora): 完成Sora网关接入与媒体能力

新增 Sora 网关路由、账号调度与同步服务\n补充媒体代理与签名 URL、模型列表动态拉取\n完善计费配置、前端支持与相关测试

backend/internal/handler/dto/mappers.go

@@ -136,6 +136,10 @@ func groupFromServiceBase(g *service.Group) Group {
 		ImagePrice1K:     g.ImagePrice1K,
 		ImagePrice2K:     g.ImagePrice2K,
 		ImagePrice4K:     g.ImagePrice4K,
+		SoraImagePrice360:         g.SoraImagePrice360,
+		SoraImagePrice540:         g.SoraImagePrice540,
+		SoraVideoPricePerRequest:  g.SoraVideoPricePerRequest,
+		SoraVideoPricePerRequestHD: g.SoraVideoPricePerRequestHD,
 		ClaudeCodeOnly:   g.ClaudeCodeOnly,
 		FallbackGroupID:  g.FallbackGroupID,
 		CreatedAt:        g.CreatedAt,
@@ -379,6 +383,7 @@ func usageLogFromServiceUser(l *service.UsageLog) UsageLog {
 		FirstTokenMs:          l.FirstTokenMs,
 		ImageCount:            l.ImageCount,
 		ImageSize:             l.ImageSize,
+		MediaType:             l.MediaType,
 		UserAgent:             l.UserAgent,
 		CreatedAt:             l.CreatedAt,
 		User:                  UserFromServiceShallow(l.User),