Keep the duty draft exports inside the knip baseline

Why: the settings page only needs the draft operations the views call. Extra aliases and unused helpers pushed the unused-export count over the baseline.
Evidence: SELF node scripts/check-knip.mjs reported 43 <= 43, and duty-draft vitest passed.
Impact: chapter-review command aliases are gone from the settings gate. The draft behavior is unchanged.
Refs: modules/frontend/knip-baseline.json
Co-authored-by: Cursor <cursoragent@cursor.com>

src/duties/draft.ts

@@ -1,7 +1,7 @@
 // 文档职责草稿的唯一存储。三个视图只投影这份数据；单元格值由三权反推。
 export type CellDuty = 'none' | 'author' | 'reviewer' | 'approver'
 
-export interface DutyRoles {
+interface DutyRoles {
   author: string
   reviewers: string[]
   approver: string
@@ -28,7 +28,7 @@ export interface DutyMember {
   canApprove: boolean
 }
 
-export interface DutySaveItem {
+interface DutySaveItem {
   docId: string
   author: string
   reviewers: string[]
@@ -80,7 +80,7 @@ export function replacementNote(roles: DutyRoles, owner: string, duty: CellDuty)
   return ''
 }
 
-export function dutyConflicts(roles: DutyRoles): number {
+function dutyConflicts(roles: DutyRoles): number {
   const seen = new Map<string, number>()
   const mark = (owner: string) => {
     if (!owner) return
@@ -112,11 +112,7 @@ export function saveIssues(roles: DutyRoles): string[] {
   return issues
 }
 
-export function sameRoles(a: DutyRoles, b: DutyRoles): boolean {
-  return a.author === b.author && a.approver === b.approver && a.reviewers.join('\0') === b.reviewers.join('\0')
-}
-
-export function rolesFromCells(docId: string, cells: { docId: string; owner: string; duty: string }[]): DutyRoles {
+function rolesFromCells(docId: string, cells: { docId: string; owner: string; duty: string }[]): DutyRoles {
   const roles: DutyRoles = { author: '', reviewers: [], approver: '' }
   for (const cell of cells) {
     if (cell.docId !== docId) continue
@@ -198,6 +194,3 @@ export function savePayload(docs: DutyDocDraft[], confirmInvalidation: boolean):
   }
 }
 
-export function needsInvalidationConfirm(docs: DutyDocDraft[]): boolean {
-  return dirtyDocs(docs).some(doc => doc.activeRound > 0)
-}

src/rdmManagement.ts

@@ -63,9 +63,6 @@ export const RDM_DUTY_COMMANDS = [
   'rdm.review.assign.doc.batch',
 ] as const
 
-/** @deprecated 设置页已改用 RDM_DUTY_COMMANDS。保留导出名，避免旧调用点仍指向审签命令。 */
-export const RDM_DOC_REVIEW_COMMANDS = RDM_DUTY_COMMANDS
-
 export type CommandListItem = { id?: string; enabled?: boolean } | null | undefined
 
 function ready(cmds: CommandListItem[] | null | undefined, need: readonly string[]): boolean {
@@ -85,9 +82,6 @@ export const rdmMembersReady = (cmds: CommandListItem[] | null | undefined) =>
 export const rdmDutyReady = (cmds: CommandListItem[] | null | undefined) =>
   ready(cmds, RDM_DUTY_COMMANDS)
 
-/** @deprecated 使用 rdmDutyReady。 */
-export const rdmDocReviewReady = rdmDutyReady
-
 /** 项目权限矩阵页是否就绪。 */
 export const rdmPermMatrixReady = (cmds: CommandListItem[] | null | undefined) =>
   ready(cmds, RDM_PERM_MATRIX_COMMANDS)