移除历史状态归一化及相关遗留逻辑

- 移除 LegacyStatusNormalizationMigrator，仅保留 AreaLayoutModeDefaultMigrator
- 删除 WmsDispatchStatus 枚举、常量和全局 using
- 统一所有 DbContext 注入为 MiGuDbContext，移除 PlatformDbContext
- 服务实体操作统一用 IEditableRepository<T>，移除本地实现
- 移除 WmsService 的 MigrateLegacyAsync 方法
- 精简接口模型，移除部分字段和请求体
- 前端保存容器时 status 字段取自已有数据，移除写死默认值
- 更新文档，去除旧说明，统一数据库初始化流程

frontends/apps/simple-platform-vue/src/types/wms.ts

@@ -206,7 +206,6 @@ export interface MasterDataPayload {
   code: string
   name: string
   type: string
-  status: string
   enabled: boolean
   sortOrder: number
   isLock: boolean

frontends/apps/simple-platform-vue/src/views/admin/WarehouseManagementView.vue

@@ -563,7 +563,7 @@ async function submitDialog() {
         ...masterForm,
         barcode: containerBarcode.value,
         length: 0, width: 0, height: 0,
-        status: 'EmptyMaterial'
+        status: containers.value.find((c) => c.id === masterForm.id)?.status ?? 'EmptyMaterial'
       })
     }
     else if (kind === 'storage') await wmsApi.saveStorage(storageForm)
@@ -683,7 +683,6 @@ function baseMaster(row?: WarehouseArea | Container): MasterDataPayload {
     code: row?.code ?? '',
     name: row?.name ?? '',
     type: 'type' in (row ?? {}) ? (row as WarehouseArea).type : (row as Container | undefined)?.containerType ?? 'Box',
-    status: (row as Container | undefined)?.status ?? 'Idle',
     enabled: row?.enabled ?? true,
     sortOrder: (row as WarehouseArea | undefined)?.sortOrder ?? 0
   }