diff --git a/frontend/src/composables/useDropdownOptions.ts b/frontend/src/composables/useDropdownOptions.ts
new file mode 100644
index 0000000..d5cbf45
--- /dev/null
+++ b/frontend/src/composables/useDropdownOptions.ts
@@ -0,0 +1,24 @@
+import { ref, type Ref } from 'vue'
+
+import { handledError } from '@/utils/error'
+
+/**
+ * 下拉选项的加载状态：取数失败不阻断列表使用（下拉为空 + 拦截器提示）。
+ *
+ * 业务/客户/人员等参照下拉在多个页面重复同一「try 取数 → map 成选项 →
+ * 失败吞掉」骨架，映射函数由调用方给出（各页字段不同），骨架收口单点。
+ */
+export function useDropdownOptions<T>(fetch: () => Promise<T[]>): {
+  options: Ref<T[]>
+  load: () => Promise<void>
+} {
+  const options = ref([]) as Ref<T[]>
+  async function load(): Promise<void> {
+    try {
+      options.value = await fetch()
+    } catch (error) {
+      handledError(error) // 下拉为空不阻断列表使用
+    }
+  }
+  return { options, load }
+}
diff --git a/frontend/src/composables/useEditingRow.ts b/frontend/src/composables/useEditingRow.ts
new file mode 100644
index 0000000..d69a456
--- /dev/null
+++ b/frontend/src/composables/useEditingRow.ts
@@ -0,0 +1,16 @@
+import { computed, type Ref } from 'vue'
+
+/**
+ * 编辑中的行：editingId 非空时从当前页记录里找出行（回显兜底用）。
+ *
+ * 回款/发货/人员三页此前各持一份逐字相同的 computed（行对象上要展示
+ * 「编辑中」的派生信息，如业务编号、停用岗位回显），收口后口径一处维护。
+ */
+export function useEditingRow<T extends { id: number }>(
+  records: Ref<T[]>,
+  editingId: Ref<number | null>,
+) {
+  return computed(() =>
+    editingId.value === null ? null : (records.value.find((r) => r.id === editingId.value) ?? null),
+  )
+}
diff --git a/frontend/src/utils/validate.ts b/frontend/src/utils/validate.ts
index 0075843..9c0da74 100644
--- a/frontend/src/utils/validate.ts
+++ b/frontend/src/utils/validate.ts
@@ -12,6 +12,21 @@ export const PASSWORD_MAX_BYTES = 72
 
 const BYTE_HINT = '（中文一个字符约 3 字节）'
 
+/**
+ * 金额形态正则（与后端 `schemas/business._check_amount` 同口径单点维护）。
+ *
+ * 「DECIMAL 列 ↔ 前端放行位数」规则此前在业务/发货/回款/人员四页各写一份
+ * （businesses 与 shipments 逐字重复，receipts/personnel 又各自内联两位小数
+ * 正则），后端精度调整时漏改任何一页，就会出现「A 页面拦得住、B 页面放行
+ * 后端 400」或「带精度历史行永远无法编辑」（fba8cfc 的教训）。
+ */
+/** 非负数字、最多两位小数（对齐 DECIMAL(14,2)：金额/数量/成本/运费/工资） */
+export const AMOUNT_PATTERN = /^(\d+)(\.\d{1,2})?$/
+/** 非负数字、最多四位小数（对齐 DECIMAL(14,4)：单价/指导价） */
+export const PRICE_PATTERN = /^(\d+)(\.\d{1,4})?$/
+/** 全零形态（数量「0 或 0.00」须拦：数量 >0 是明细行的硬约束） */
+export const ZERO_PATTERN = /^0+(\.0+)?$/
+
 /** 计算 UTF-8 字节数 */
 export function passwordByteLength(value: string): number {
   return new TextEncoder().encode(value).length
diff --git a/frontend/src/views/base/personnel/index.vue b/frontend/src/views/base/personnel/index.vue
index 0af2bd2..97ab0b4 100644
--- a/frontend/src/views/base/personnel/index.vue
+++ b/frontend/src/views/base/personnel/index.vue
@@ -9,6 +9,8 @@ import AppPagination from '@/components/table/AppPagination.vue'
 import StatusTag from '@/components/table/StatusTag.vue'
 import { useConfirmAction } from '@/composables/useConfirmAction'
 import { usePagedList } from '@/composables/usePagedList'
+import { useEditingRow } from '@/composables/useEditingRow'
+import { AMOUNT_PATTERN } from '@/utils/validate'
 import { handledError } from '@/utils/error'
 
 /**
@@ -107,9 +109,7 @@ const form = reactive({
 })
 
 /** 编辑中的行（用于停用岗位/离职经理的回显兜底） */
-const editingRow = computed(() =>
-  editingId.value === null ? null : records.value.find((r) => r.id === editingId.value) ?? null,
-)
+const editingRow = useEditingRow(records, editingId)
 
 /** 搜索下拉显示全部岗位（含停用，便于筛出仍绑定停用岗位的人员） */
 const searchRoleOptions = computed(() =>
@@ -139,7 +139,7 @@ const rules = computed<FormRules>(() => ({
   business_role_id: [{ required: true, message: '请选择岗位', trigger: 'change' }],
   phone: [{ max: 20, message: '联系电话最长 20 个字符', trigger: 'blur' }],
   salary_standard: [
-    { pattern: /^(\d+)(\.\d{1,2})?$/, message: '工资标准须为非负数字，最多两位小数', trigger: 'blur' },
+    { pattern: AMOUNT_PATTERN, message: '工资标准须为非负数字，最多两位小数', trigger: 'blur' },
   ],
   remark: [{ max: 255, message: '备注最长 255 个字符', trigger: 'blur' }],
 }))
diff --git a/frontend/src/views/business/businesses/index.vue b/frontend/src/views/business/businesses/index.vue
index a566b61..45cfa7c 100644
--- a/frontend/src/views/business/businesses/index.vue
+++ b/frontend/src/views/business/businesses/index.vue
@@ -12,6 +12,7 @@ import AppPagination from '@/components/table/AppPagination.vue'
 import { useConfirmAction } from '@/composables/useConfirmAction'
 import { usePagedList } from '@/composables/usePagedList'
 import { formatDateTime } from '@/utils/format'
+import { AMOUNT_PATTERN, PRICE_PATTERN, ZERO_PATTERN } from '@/utils/validate'
 import { handledError } from '@/utils/error'
 
 /**
@@ -101,15 +102,6 @@ function personnelLabel(option: PersonnelOption): string {
 
 // ==================== 新增 / 编辑（含明细行编辑器） ====================
 
-/** 金额/数量形态：非负数字、最多两位小数（纯形态校验，不涉及 float 运算） */
-const AMOUNT_PATTERN = /^(\d+)(\.\d{1,2})?$/
-// 单价类列（sale_price/guided_price）建表为 Numeric(14,4)：后端 str 直出
-// 会带最多 4 位小数（如 "5000.0000"），前端必须放行到 4 位——否则任何
-// 带小数精度的历史记录在编辑时都会被前端永远拦下
-const PRICE_PATTERN = /^(\d+)(\.\d{1,4})?$/
-/** 全零形态：数量用它排除「>0」语义，不走 float 比较 */
-const ZERO_PATTERN = /^0+(\.0+)?$/
-
 const dialogVisible = ref(false)
 const editingId = ref<number | null>(null)
 /** 单一状态源：编辑中 ⇔ editingId 非空（避免双状态漂移） */
@@ -429,8 +421,11 @@ function personnelName(id: number): string {
 // ==================== 详情抽屉 ====================
 
 const drawerVisible = ref(false)
-const drawerRowId = ref<number | null>(null)
 const drawerRow = ref<BusinessItem | null>(null)
+// 单一状态源：drawerRowId 派生自 drawerRow（此前与 ownershipLogsId 三份并存、
+// openDrawer 手工同步——新增写入路径漏更新其一就会出现「标题是 A 业务、
+// 留痕表拉到 B 业务」且无报错）
+const drawerRowId = computed(() => drawerRow.value?.id ?? null)
 const drawerTitle = computed(() =>
   drawerRow.value ? `「${drawerRow.value.business_no}」· 业务详情` : '业务详情',
 )
@@ -467,12 +462,10 @@ async function refreshDrawer(id: number): Promise<void> {
 
 function openDrawer(row: BusinessItem): void {
   drawerRow.value = row
-  drawerRowId.value = row.id
   drawerVisible.value = true
   detail.value = null
   statusLogs.value = []
   gp.value = null
-  ownershipLogsId.value = row.id
   ownershipLogPageNum.value = 1
   void loadDrawerData(row.id)
   void loadOwnershipLogs()
@@ -491,7 +484,7 @@ const {
   onSizeChange: onOwnershipLogSizeChange,
 } = usePagedList<businessApi.OwnershipLogItem, object>(
   (params) => {
-    const id = ownershipLogsId.value
+    const id = drawerRowId.value
     // 抽屉未指定业务时兜底空数据，避免发出无意义请求
     return id === null
       ? Promise.resolve({ list: [], total: 0, pageNum: 1, pageSize: 10 })
@@ -500,8 +493,6 @@ const {
   () => ({}),
 )
 
-const ownershipLogsId = ref<number | null>(null)
-
 /** 留痕展示：负责/协助的新旧人员（姓名随联表，ID 固化） */
 function ownershipTransition(row: businessApi.OwnershipLogItem): string {
   const oldOwner = row.old_owner_name ?? '（无）'
diff --git a/frontend/src/views/business/receipts/index.vue b/frontend/src/views/business/receipts/index.vue
index 35a6e80..45d4469 100644
--- a/frontend/src/views/business/receipts/index.vue
+++ b/frontend/src/views/business/receipts/index.vue
@@ -10,6 +10,9 @@ import type { ShipmentItem } from '@/api/shipments'
 import AppPagination from '@/components/table/AppPagination.vue'
 import { useConfirmAction } from '@/composables/useConfirmAction'
 import { usePagedList } from '@/composables/usePagedList'
+import { AMOUNT_PATTERN } from '@/utils/validate'
+import { useEditingRow } from '@/composables/useEditingRow'
+import { useDropdownOptions } from '@/composables/useDropdownOptions'
 import { handledError } from '@/utils/error'
 
 /**
@@ -63,21 +66,17 @@ interface BusinessOption {
   name: string
 }
 
-const businessOptions = ref<BusinessOption[]>([])
-
-async function loadBusinessOptions(): Promise<void> {
-  try {
-    // 业务下拉数据源：一页 200 条覆盖内部系统规模；超出由后端校验兜底
+// 业务下拉数据源：一页 200 条覆盖内部系统规模；超出由后端校验兜底
+const { options: businessOptions, load: loadBusinessOptions } = useDropdownOptions<BusinessOption>(
+  async () => {
     const data = await businessApi.listBusinesses({ pageNum: 1, pageSize: 200 })
-    businessOptions.value = data.list.map((b) => ({
+    return data.list.map((b) => ({
       id: b.id,
       no: b.business_no,
       name: b.customer_name ?? '',
     }))
-  } catch (error) {
-    handledError(error) // 下拉为空不阻断列表使用
-  }
-}
+  },
+)
 
 function businessLabel(option: BusinessOption): string {
   return option.name ? `${option.no} · ${option.name}` : option.no
@@ -85,9 +84,6 @@ function businessLabel(option: BusinessOption): string {
 
 // ==================== 新增 / 编辑 ====================
 
-/** 金额形态：非负数字、最多两位小数（与后端 `_check_amount` 同口径） */
-const AMOUNT_PATTERN = /^(\d+)(\.\d{1,2})?$/
-
 const dialogVisible = ref(false)
 const editingId = ref<number | null>(null)
 /** 单一状态源：编辑中 ⇔ editingId 非空（避免双状态漂移） */
@@ -124,9 +120,7 @@ const shipmentOptions = ref<ShipmentItem[]>([])
 const shipmentLoading = ref(false)
 
 /** 编辑中的回款（回显业务编号/批次语义用） */
-const editingRow = computed(() =>
-  editingId.value === null ? null : records.value.find((r) => r.id === editingId.value) ?? null,
-)
+const editingRow = useEditingRow(records, editingId)
 
 /** 下拉展示：发货单号（发货日期，总额）—— 与任务约定文案一致 */
 function shipmentLabel(row: ShipmentItem): string {
diff --git a/frontend/src/views/business/shipments/index.vue b/frontend/src/views/business/shipments/index.vue
index 2143908..8586108 100644
--- a/frontend/src/views/business/shipments/index.vue
+++ b/frontend/src/views/business/shipments/index.vue
@@ -8,6 +8,9 @@ import type { ShipmentDetail, ShipmentItem } from '@/api/shipments'
 import AppPagination from '@/components/table/AppPagination.vue'
 import { useConfirmAction } from '@/composables/useConfirmAction'
 import { usePagedList } from '@/composables/usePagedList'
+import { AMOUNT_PATTERN, PRICE_PATTERN, ZERO_PATTERN } from '@/utils/validate'
+import { useEditingRow } from '@/composables/useEditingRow'
+import { useDropdownOptions } from '@/composables/useDropdownOptions'
 import { handledError } from '@/utils/error'
 
 /**
@@ -55,22 +58,18 @@ interface BusinessOption {
   status: number
 }
 
-const businessOptions = ref<BusinessOption[]>([])
-
-async function loadBusinessOptions(): Promise<void> {
-  try {
-    // 业务下拉数据源：一页 200 条覆盖标签页规模；超出规模由后端校验兜底
+// 业务下拉数据源：一页 200 条覆盖标签页规模；超出规模由后端校验兜底
+const { options: businessOptions, load: loadBusinessOptions } = useDropdownOptions<BusinessOption>(
+  async () => {
     const data = await businessApi.listBusinesses({ pageNum: 1, pageSize: 200 })
-    businessOptions.value = data.list.map((b) => ({
+    return data.list.map((b) => ({
       id: b.id,
       no: b.business_no,
       name: b.customer_name ?? '',
       status: b.status,
     }))
-  } catch (error) {
-    handledError(error) // 下拉为空不阻断列表使用
-  }
-}
+  },
+)
 
 /** 下拉项展示：业务编号 + 客户名；终态业务加后缀标注（创建发货单会被后端拦） */
 function businessLabel(option: BusinessOption): string {
@@ -80,13 +79,6 @@ function businessLabel(option: BusinessOption): string {
 
 // ==================== 新增 / 编辑（含明细行编辑器） ====================
 
-/** 金额/数量形态：非负数字、最多两位小数（与后端 `_check_amount` 同口径） */
-const AMOUNT_PATTERN = /^(\d+)(\.\d{1,2})?$/
-// 发货单价列建表为 Numeric(14,4)：后端 str 直出带最多 4 位小数，前端放行到 4 位
-const PRICE_PATTERN = /^(\d+)(\.\d{1,4})?$/
-/** 全零形态：数量排除「>0」语义，不走 float 比较 */
-const ZERO_PATTERN = /^0+(\.0+)?$/
-
 const dialogVisible = ref(false)
 const editingId = ref<number | null>(null)
 /** 单一状态源：编辑中 ⇔ editingId 非空（避免双状态漂移） */
@@ -95,9 +87,7 @@ const formRef = ref<FormInstance>()
 const submitting = ref(false)
 
 /** 编辑中的发货单（回显业务编号用，编辑挂靠不可改） */
-const editingRow = computed(() =>
-  editingId.value === null ? null : records.value.find((r) => r.id === editingId.value) ?? null,
-)
+const editingRow = useEditingRow(records, editingId)
 
 /** 明细行草稿（编辑时由详情回显；全量替换，行 id 不参与提交） */
 interface ItemDraft {
diff --git a/frontend/src/views/system/params/index.vue b/frontend/src/views/system/params/index.vue
index 36ddfa5..6f4c21c 100644
--- a/frontend/src/views/system/params/index.vue
+++ b/frontend/src/views/system/params/index.vue
@@ -14,6 +14,7 @@ import type {
 } from '@/api/params'
 import AppPagination from '@/components/table/AppPagination.vue'
 import { useConfirmAction } from '@/composables/useConfirmAction'
+import { usePagedList } from '@/composables/usePagedList'
 import { handledError } from '@/utils/error'
 
 /**
@@ -189,25 +190,20 @@ async function submitAll(): Promise<void> {
 // ==================== 版本管理抽屉 ====================
 
 const versionVisible = ref(false)
-const batches = ref<ParamBatch[]>([])
-const batchesTotal = ref(0)
-const batchesPage = ref(1)
-const batchesPageSize = ref(10)
-const batchesLoading = ref(false)
 const detailCache = reactive<Record<number, ParamBatchDetail>>({})
 
-async function loadBatches(): Promise<void> {
-  batchesLoading.value = true
-  try {
-    const page = await paramsApi.listBatches({ pageNum: batchesPage.value, pageSize: batchesPageSize.value })
-    batches.value = page.list
-    batchesTotal.value = page.total
-  } catch (error) {
-    handledError(error)
-  } finally {
-    batchesLoading.value = false
-  }
-}
+// 分页五件套换 usePagedList：手写版没有请求序号防竞态（快速翻页时旧响应
+// 后到会覆盖新页数据）与页码回退——正是该 composable 注释里写明已修过的坑
+const {
+  records: batches,
+  total: batchesTotal,
+  pageNum: batchesPage,
+  pageSize: batchesPageSize,
+  loading: batchesLoading,
+  load: loadBatches,
+  onPageChange: onBatchesPageChange,
+  onSizeChange: onBatchesSizeChange,
+} = usePagedList<ParamBatch, Record<string, never>>(paramsApi.listBatches, () => ({}))
 
 async function detailOf(batch: ParamBatch): Promise<ParamBatchDetail> {
   if (detailCache[batch.id]) return detailCache[batch.id]
@@ -299,11 +295,21 @@ function openVersionDrawer(): void {
 
 const historyVisible = ref(false)
 const historyItem = ref<ParamCatalogItem | null>(null)
-const historyRows = ref<ParamHistory[]>([])
-const historyTotal = ref(0)
-const historyPage = ref(1)
-const historyPageSize = ref(10)
-const historyLoading = ref(false)
+
+// 历史抽屉分页同样收口 usePagedList；fetcher 闭包当前参数的编码
+const {
+  records: historyRows,
+  total: historyTotal,
+  pageNum: historyPage,
+  pageSize: historyPageSize,
+  loading: historyLoading,
+  load: loadHistory,
+  onPageChange: onHistoryPageChange,
+  onSizeChange: onHistorySizeChange,
+} = usePagedList<ParamHistory, Record<string, never>>(
+  (params) => paramsApi.getParamHistory(historyItem.value!.param_code, params),
+  () => ({}),
+)
 
 function openHistory(item: ParamCatalogItem): void {
   historyItem.value = item
@@ -312,23 +318,6 @@ function openHistory(item: ParamCatalogItem): void {
   void loadHistory()
 }
 
-async function loadHistory(): Promise<void> {
-  if (!historyItem.value) return
-  historyLoading.value = true
-  try {
-    const page = await paramsApi.getParamHistory(historyItem.value.param_code, {
-      pageNum: historyPage.value,
-      pageSize: historyPageSize.value,
-    })
-    historyRows.value = page.list
-    historyTotal.value = page.total
-  } catch (error) {
-    handledError(error)
-  } finally {
-    historyLoading.value = false
-  }
-}
-
 // ==================== 计算预览抽屉 ====================
 
 const previewVisible = ref(false)
@@ -667,8 +656,8 @@ onMounted(() => {
           :total="batchesTotal"
           :page-num="batchesPage"
           :page-size="batchesPageSize"
-          @page-change="(p: number) => { batchesPage = p; void loadBatches() }"
-          @size-change="(s: number) => { batchesPageSize = s; batchesPage = 1; void loadBatches() }"
+          @page-change="onBatchesPageChange"
+          @size-change="onBatchesSizeChange"
         />
       </div>
     </el-drawer>
@@ -692,8 +681,8 @@ onMounted(() => {
         :total="historyTotal"
         :page-num="historyPage"
         :page-size="historyPageSize"
-        @page-change="(p: number) => { historyPage = p; void loadHistory() }"
-        @size-change="(s: number) => { historyPageSize = s; historyPage = 1; void loadHistory() }"
+        @page-change="onHistoryPageChange"
+        @size-change="onHistorySizeChange"
       />
     </el-drawer>