[CLAUDE] Contract+FE-User: dot-5 menu 6-leaf y-chang-Duyet-NCC + GET /contracts/deleted + bo hero + "Tong quan quy trinh"

- BE: ListDeletedContractsQuery (IgnoreQueryFilters + Where(IsDeleted) + IDOR mirror; LUAT thay so-dem theo reviewer FLAG-10) + GET /contracts/deleted [Contracts.Read]
- Seeder: Ct x7 +3 leaf (WfView/Approved/Deleted) + labelBackfill "Dang duyet" x7 + Khkk 6 leaf + Dashboard -> "Tong quan quy trinh" + reviewKeys +23 key
- FE user: matrix +type=3 (HD chung 1 bo V2) + route /contracts/workflow-matrix + Ct regex +3 action + MyContractsPage (phase/deleted + banner + an nut Tao + FLAG-2 guard selectContract khi deleted) + MenuLeaf depth-0 UPPERCASE + UserDashboardPage BO HERO (owner: "bo cai tren di, cai duoi OK") + title "Tong quan quy trinh"
- fe-admin: staticMap +2 Khkk (FLAG-1); leaf Ct_ moi van an theo isAdminHidden (da kiem CLEAN)
- reviewer PASS_WITH_FLAGS 10 FLAG (0H/4M/6L): fix 4M, park 6L co ghi (FLAG-4 dinh nghia "Da duyet" HD -> cho owner)
- build fe x2 + BE PASS; test 562 PASS

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/Backend/SolutionErp.Api/Controllers/ContractsController.cs

@@ -23,6 +23,18 @@ public class ContractsController(IMediator mediator) : ControllerBase
         CancellationToken ct = default)
         => Ok(await mediator.Send(new ListContractsQuery(phase, supplierId, projectId) { Page = page, PageSize = pageSize, Search = search, SortDesc = sortDesc }, ct));
 
+    // [S159-đợt5] Màn "Đã xóa" HĐ (chỉ-xem) — mirror PE /deleted (S155). Read-only,
+    // policy root Contracts.Read (chặt hơn [Authorize] trần của class — không phá gì).
+    [HttpGet("deleted")]
+    [Authorize(Policy = "Contracts.Read")]
+    public async Task<ActionResult<PagedResult<ContractListItemDto>>> ListDeleted(
+        [FromQuery] ContractType? type = null,
+        [FromQuery] int page = 1, [FromQuery] int pageSize = 20,
+        [FromQuery] string? search = null, [FromQuery] bool sortDesc = true,
+        CancellationToken ct = default)
+        => Ok(await mediator.Send(new ListDeletedContractsQuery(type)
+        { Page = page, PageSize = pageSize, Search = search, SortDesc = sortDesc }, ct));
+
     [HttpGet("inbox")]
     public async Task<ActionResult<List<ContractListItemDto>>> Inbox(CancellationToken ct)
         => Ok(await mediator.Send(new GetMyInboxQuery(), ct));