fix(consignment): 寄售价支持低于1元并按分类校验寄售数量上限

apps/frontend/src/utils/consignment-publish-limits.ts

@@ -0,0 +1,39 @@
+import type { ConsignmentProfileConfig } from '../types/consignment'
+
+/** 寄售价允许低于 1 元：配置了最低价就按最低价，否则只要求大于 0（输入框用 0.01）。 */
+export function resolveConsignmentPriceMinYuan(minPriceFen: number | null | undefined): number {
+  const fen = Math.max(0, Math.round(Number(minPriceFen || 0)))
+  return fen > 0 ? fen / 100 : 0.01
+}
+
+export type ConsignmentQuantityLimit = {
+  enabled: boolean
+  maxActiveQuantity: number
+  activeQuantity: number
+  remainingQuantity: number
+  blocked: boolean
+}
+
+/**
+ * 单个分类的寄售数量上限：后端按配置 profile_id 统计「在售 + 待审核」件数，
+ * 这里用接口返回的 activeQuantity 计算当前还能寄卖多少件。
+ */
+export function resolveConsignmentQuantityLimit(
+  config: Pick<ConsignmentProfileConfig, 'inventoryLimit'> | null | undefined,
+  activeQuantity: number | null | undefined,
+): ConsignmentQuantityLimit {
+  const maxActiveQuantity = Math.max(
+    0,
+    Math.round(Number(config?.inventoryLimit?.maxActiveQuantity || 0)),
+  )
+  const active = Math.max(0, Math.round(Number(activeQuantity || 0)))
+  const enabled = config?.inventoryLimit?.enabled === true
+  const remainingQuantity = enabled ? Math.max(0, maxActiveQuantity - active) : 0
+  return {
+    enabled,
+    maxActiveQuantity,
+    activeQuantity: active,
+    remainingQuantity,
+    blocked: enabled && remainingQuantity <= 0,
+  }
+}