feat(frontend): 绩效台账与月度结算两页接入（新组绩效工资）

- 绩效台账页（order17）：月/版本筛选 + 行展开计算快照 + 重算（原因
  对话框，管理员/财务）；核算入口在回款管理页（每笔回款行内触发）
- 月结页（order18）：生成快照（月份输入）+ 状态筛选 + 提交审批 +
  详情抽屉（按人明细三口径/试用期说明/审批单号关联）
- 均复用 usePagedList/AppPagination/--ys-* 惯例；金额 str 直出
- type-check 零错误；build 通过

Co-Authored-By: Claude Code <noreply@anthropic.com>

frontend/src/api/settlements.ts

@@ -0,0 +1,105 @@
+import request from './request'
+import type { PageData } from './types'
+
+/** 月结状态：1草稿 2待审批 3已审定（=已锁定）4已驳回 */
+export const SETTLEMENT_STATUS = {
+  DRAFT: 1,
+  PENDING: 2,
+  APPROVED: 3,
+  REJECTED: 4,
+} as const
+
+export function settlementStatusLabel(status: number): string {
+  return (
+    { 1: '草稿', 2: '待审批', 3: '已审定（锁定）', 4: '已驳回' }[status] ?? String(status)
+  )
+}
+
+export function settlementStatusTagType(
+  status: number,
+): 'primary' | 'success' | 'danger' | 'warning' | 'info' {
+  return (
+    ({ 1: 'info', 2: 'primary', 3: 'success', 4: 'danger', 5: 'info' } as const)[status] ?? 'info'
+  )
+}
+
+export interface SettlementItem {
+  id: number
+  personnel_id: number
+  personnel_name: string
+  role_code: string
+  calc_type: number
+  performance_sum: string
+  payable_sum: string
+  basic_amount: string | null
+  salary_mode: string | null
+  net_amount: string | null
+  is_probation: number
+  probation_note: string | null
+}
+
+export interface Settlement {
+  id: number
+  settlement_month: string
+  status: number
+  total_performance: string | null
+  total_payable: string | null
+  person_count: number
+  approval_order_no: string | null
+  submitter_name: string
+  locked_at: string | null
+  locked_by: string | null
+  create_time: string
+}
+
+export interface SettlementDetail extends Settlement {
+  items: SettlementItem[]
+}
+
+export interface SettlementQueryParams {
+  pageNum?: number
+  pageSize?: number
+  status?: number
+}
+
+export function listSettlements(params: SettlementQueryParams): Promise<PageData<Settlement>> {
+  return request({ url: '/v1/settlements', method: 'get', params })
+}
+
+export function getSettlement(id: number): Promise<SettlementDetail> {
+  return request({ url: `/v1/settlements/${id}`, method: 'get' })
+}
+
+export function generateSettlement(month: string): Promise<SettlementDetail> {
+  return request({ url: '/v1/settlements/generate', method: 'post', data: { month } })
+}
+
+export function submitSettlement(id: number): Promise<SettlementDetail> {
+  return request({ url: `/v1/settlements/${id}/submit`, method: 'post' })
+}
+
+/** 调整单（已锁定月份的补发/扣减） */
+export interface AdjustmentRow {
+  id: number
+  order_no: string
+  settlement_month: string
+  personnel_name: string
+  direction: number
+  amount: string
+  reason: string
+  status: number
+}
+
+export function createAdjustment(data: {
+  settlement_month: string
+  personnel_id: number
+  direction: number
+  amount: string
+  reason: string
+}): Promise<Record<string, unknown>> {
+  return request({ url: '/v1/settlements/adjustments', method: 'post', data })
+}
+
+export function listAdjustments(): Promise<AdjustmentRow[]> {
+  return request({ url: '/v1/settlements/adjustments', method: 'get' })
+}