[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>

src/Backend/SolutionErp.Infrastructure/Persistence/Configurations/ApprovalWorkflowConfiguration.cs

@@ -22,6 +22,9 @@ public class ApprovalWorkflowConfiguration : IEntityTypeConfiguration<ApprovalWo
         // Mig 28 cũ 6 column Allow* đã DROP trong Mig 29 (S21 t5) — refactor sang
         // per-NV (Level table cho F1+F3, Users table cho F2). Backfill bulk SQL
         // preserve config admin từ S21 t4 trước khi drop.
+        // + Mig 31 (S23 t1) F2 refactor sang Approver scope per-Level slot —
+        // AllowApproverSkipToFinal trên Level table (admin opt-in per slot,
+        // KHÔNG còn per-Drafter user scope cũ Mig 29).
     }
 }
 
@@ -84,7 +87,7 @@ public class ApprovalWorkflowLevelConfiguration : IEntityTypeConfiguration<Appro
 
         // Mig 31 (S23 t1 Plan K Chunk A) — F2 per-NV REFACTOR: cho phép Approver
         // slot này skip thẳng Cấp cuối lúc đang duyệt ChoDuyet. Default false
-        // (admin opt-in). Semantic + storage move từ Users.AllowDrafterSkipToFinal.
+        // (admin opt-in). Semantic + storage cũ ở Users table per-Drafter đã drop.
         e.Property(x => x.AllowApproverSkipToFinal).HasDefaultValue(false);
     }
 }