feat: 添加获取全局选项接口，支持动态状态和曲种选择

backend/app/http/v1/common.go

@@ -39,3 +39,16 @@ func (c *Common) Upload(
 	}
 	return services.Common.Upload(ctx.Context(), user.ID, file, val)
 }
+
+// Get options (enums)
+//
+// @Router /v1/common/options [get]
+// @Summary Get options
+// @Description Get global options (enums)
+// @Tags Common
+// @Accept json
+// @Produce json
+// @Success 200 {object} dto.OptionsResponse
+func (c *Common) GetOptions(ctx fiber.Ctx) (*dto.OptionsResponse, error) {
+	return services.Common.Options(ctx.Context())
+}