[CLAUDE] Backout: Chunk D — K5 cleanup F2 zombie endpoint + UsersPage column + DTO field

Reviewer K2 Major #1: PATCH /api/users/{id}/allow-skip-final endpoint Admin tick =
NoOp swallow silent (K1 sentinel → confusion UX). Full backout Plan D S22 stack:

BE drop (7 files):
- UsersController.cs: DELETE PATCH /allow-skip-final endpoint + SetAllowDrafterSkipToFinalBody record
- UserFeatures.cs: DELETE SetUserAllowDrafterSkipToFinalCommand + Handler
                    + UserDto.AllowDrafterSkipToFinal field
                    + list/get DTO mapping sentinel-false references
- ApprovalWorkflow.cs: REWRITE stale narrative line 78-80 (Reviewer Major #2 Mig 31 semantic)
                       + docstring AllowApproverSkipToFinal line 108 clean stale Users storage ref
- PurchaseEvaluationFeatures.cs: REWRITE Command DTO comment line 401 (Reviewer Minor #3)
- ApprovalWorkflowConfiguration.cs: APPEND Mig 31 narrative line 22-24 (Reviewer Minor #4)
                                     + clean storage move comment line 87
- ApprovalWorkflowV2AdminFeatures.cs: clean DTO comment line 58 stale "F2 xuống User table"
- IPurchaseEvaluationWorkflowService.cs + PurchaseEvaluationDtos.cs: clean stale
  "storage Users.AllowDrafterSkipToFinal" comments

FE Admin drop (2 files):
- UsersPage.tsx: DELETE "Skip cuối" column + FastForward badge + FastForward import
                  + allowSkipMut mutation hook + FastForward toggle button
- types/users.ts: DELETE allowDrafterSkipToFinal field

fe-user KHÔNG đụng (no UsersPage admin-only; K6 sẽ handle Workspace Drafter checkbox).
FE Designer page KHÔNG đụng (K3 done; 2 stale comment leftover deferred K6).

Plan K refactor F2 storage Users → Levels (Mig 31) complete cumulative cleanup.
Pattern reusable: post-refactor full cleanup (BE endpoint + Command + DTO + FE column
+ types + stale narratives) atomic 1 commit thay vì leak zombie state.

Verify:
- dotnet build production projects 0 err (2 pre-existing DocxRenderer warn)
- npm build fe-admin 0 TS err (no new warning)
- Grep AllowDrafterSkipToFinal + allow-skip-final + allowDrafterSkipToFinal zero results
  across src/Backend (excl Migrations history) + fe-admin/src

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fe-admin/src/pages/system/UsersPage.tsx

@@ -1,6 +1,6 @@
 import { useState, type FormEvent } from 'react'
 import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
-import { Building2, KeyRound, Pencil, Plus, Shield, Unlock, Users, CheckCircle2, XCircle, ShieldCheck, FastForward } from 'lucide-react'
+import { Building2, KeyRound, Pencil, Plus, Shield, Unlock, Users, CheckCircle2, XCircle, ShieldCheck } from 'lucide-react'
 import { toast } from 'sonner'
 import { PageHeader } from '@/components/PageHeader'
 import { DataTable, Pagination, type Column } from '@/components/DataTable'
@@ -175,18 +175,9 @@ export function UsersPage() {
     onError: err => toast.error(getErrorMessage(err)),
   })
 
-  // F2 per-Drafter (Mig 29): toggle AllowDrafterSkipToFinal. Khi true, Drafter
-  // được tick "Gửi thẳng Cấp cuối" trong PE Workspace để skip Bước/Cấp trung
-  // gian và bay thẳng tới Cấp cuối workflow.
-  const allowSkipMut = useMutation({
-    mutationFn: (u: User) =>
-      api.patch(`/users/${u.id}/allow-skip-final`, { allowDrafterSkipToFinal: !u.allowDrafterSkipToFinal }),
-    onSuccess: () => {
-      qc.invalidateQueries({ queryKey: ['users'] })
-      toast.success('Đã cập nhật quyền gửi thẳng Cấp cuối')
-    },
-    onError: err => toast.error(getErrorMessage(err)),
-  })
+  // Mig 31 (S23 t1 Plan K Chunk D) — DELETED allowSkipMut. F2 semantic + storage
+  // refactor sang ApprovalWorkflowLevels (per-Approver slot, admin opt-in qua
+  // Workflow Designer page). KHÔNG còn per-Drafter user toggle ở User Management.
 
   function nextPositionLevel(current: number | null): number | null {
     // Cycle null → 1 (NV) → 2 (PP) → 3 (TP) → null
@@ -302,21 +293,6 @@ export function UsersPage() {
           <span className="text-xs text-slate-400">—</span>
         ),
     },
-    {
-      key: 'allowDrafterSkipToFinal',
-      header: 'Skip cuối',
-      width: 'w-20',
-      align: 'center',
-      render: u =>
-        u.allowDrafterSkipToFinal ? (
-          <span title="Drafter được gửi PE thẳng Cấp cuối workflow (skip Bước/Cấp trung gian)" className="inline-flex items-center gap-1 rounded bg-violet-100 px-1.5 py-0.5 text-[10px] text-violet-700">
-            <FastForward className="h-3 w-3" />
-            skip
-          </span>
-        ) : (
-          <span className="text-xs text-slate-400">—</span>
-        ),
-    },
     { key: 'createdAt', header: 'Ngày tạo', width: 'w-24', render: u => fmtDate(u.createdAt) },
     {
       key: 'actions',
@@ -362,14 +338,6 @@ export function UsersPage() {
                 {u.positionLevel != null ? PositionLevelShort[u.positionLevel] : '—'}
               </span>
             </Button>
-            <Button
-              size="sm"
-              variant="ghost"
-              onClick={() => allowSkipMut.mutate(u)}
-              title={u.allowDrafterSkipToFinal ? 'Tắt quyền skip — Drafter phải tuần tự qua mọi Bước/Cấp' : 'Bật quyền skip — Drafter được gửi PE thẳng Cấp cuối workflow'}
-            >
-              <FastForward className={`h-3.5 w-3.5 ${u.allowDrafterSkipToFinal ? 'text-violet-600' : 'text-slate-400'}`} />
-            </Button>
             <Button size="sm" variant="ghost" onClick={() => toggleActiveMut.mutate(u)} title={u.isActive ? 'Vô hiệu hóa' : 'Kích hoạt'}>
               {u.isActive ? <XCircle className="h-3.5 w-3.5 text-red-500" /> : <CheckCircle2 className="h-3.5 w-3.5 text-emerald-600" />}
             </Button>

fe-admin/src/types/users.ts

@@ -11,7 +11,6 @@ export type User = {
   position: string | null
   canBypassReview: boolean
   positionLevel: number | null    // Mig 18 — 1=NV, 2=PP, 3=TP, null=admin/external
-  allowDrafterSkipToFinal: boolean // Mig 29 — F2: Drafter được gửi thẳng Cấp cuối workflow PE
 }
 
 // Cấp chức danh trong phòng (Mig 18) — phục vụ N-stage workflow inner step.