[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.Api/Controllers/UsersController.cs

@@ -85,21 +85,13 @@ public class UsersController(IMediator mediator) : ControllerBase
         return NoContent();
     }
 
-    // Mig 29 F2 per-Drafter: admin toggle AllowDrafterSkipToFinal cho user. Khi
-    // true, Drafter có thể tick "Gửi thẳng Cấp cuối" trong PE Workspace để bay
-    // thẳng tới Cấp cuối workflow. Mặc định false.
-    [HttpPatch("{id:guid}/allow-skip-final")]
-    [Authorize(Policy = "Users.Update")]
-    public async Task<IActionResult> SetAllowDrafterSkipToFinal(
-        Guid id, [FromBody] SetAllowDrafterSkipToFinalBody body, CancellationToken ct)
-    {
-        await mediator.Send(new SetUserAllowDrafterSkipToFinalCommand(id, body.AllowDrafterSkipToFinal), ct);
-        return NoContent();
-    }
+    // Mig 31 (S23 t1 Plan K Chunk D) — DELETED PATCH F2 endpoint per-Drafter.
+    // F2 semantic + storage refactor sang ApprovalWorkflowLevels per-Approver
+    // slot (AllowApproverSkipToFinal, admin opt-in qua Workflow Designer).
+    // Plan K backout zombie endpoint NoOp.
 }
 
 public record AssignRolesBody(List<string> Roles);
 public record ResetPasswordBody(string NewPassword);
 public record SetBypassReviewBody(bool CanBypassReview);
 public record SetPositionLevelBody(int? PositionLevel);
-public record SetAllowDrafterSkipToFinalBody(bool AllowDrafterSkipToFinal);