refactor: 移除不必要的配置依赖，简化上传URL生成逻辑并添加公开访问URL支持

internal/handler/texture_handler.go

@@ -4,7 +4,6 @@ import (
 	"carrotskin/internal/model"
 	"carrotskin/internal/service"
 	"carrotskin/internal/types"
-	"carrotskin/pkg/config"
 	"carrotskin/pkg/database"
 	"carrotskin/pkg/logger"
 	"carrotskin/pkg/storage"
@@ -38,11 +37,9 @@ func GenerateTextureUploadURL(c *gin.Context) {
 	}
 
 	storageClient := storage.MustGetClient()
-	cfg := *config.MustGetRustFSConfig()
 	result, err := service.GenerateTextureUploadURL(
 		c.Request.Context(),
 		storageClient,
-		cfg,
 		userID,
 		req.FileName,
 		string(req.TextureType),