[CLAUDE] App+Api+FE: Kế thừa HĐ từ phiếu Duyệt NCC (Phase 4)

BE:
 - CreateContractFromEvaluationCommand: guard DaDuyet + SelectedSupplier
   + ContractId=null → tạo Contract draft mới với SupplierId/ProjectId/
   DepartmentId kế thừa từ PE. GiaTri = sum(details.thanhTienNganSach).
   DraftData = PE.PaymentTerms. Gen MaHopDong ngay + pin WorkflowDefinitionId
   theo ContractType user chọn. Log Changelog cả 2 bảng (Contract +
   PurchaseEvaluation), link 2 chiều PE.ContractId = contract.Id.
 - ListApprovedPurchaseEvaluationsQuery: DaDuyet + ContractId=null cho
   FE picker.
 - 2 endpoint mới:
   GET  /api/purchase-evaluations/approved-pending-contract
   POST /api/purchase-evaluations/{id}/create-contract

FE:
 - PeDetailTabs InfoTab: nếu Phase=DaDuyet && !ContractId && SelectedSupplierId
   → banner emerald + button "Tạo HĐ từ phiếu" → CreateContractDialog
   (pick ContractType dropdown 7 loại + TenHopDong + bypass CCM flag)
 - Sau khi tạo → navigate /contracts/{newId}
 - Mirror fe-user.

KHÔNG auto-map PE Details → Contract Details per-type (PE schema ≠ 7
ContractType details schemas — user điền lại sau). PE → Contract link
qua FK ContractId cho navigation + history.

fe-admin/src/components/pe/PeDetailTabs.tsx

@@ -121,7 +121,10 @@ export function PeDetailTabs({
 
 // ===== Tab: Thông tin =====
 function InfoTab({ ev }: { ev: PeDetailBundle }) {
+  const canCreateContract = ev.phase === PurchaseEvaluationPhase.DaDuyet && !ev.contractId && ev.selectedSupplierId
+  const [createOpen, setCreateOpen] = useState(false)
   return (
+    <div className="space-y-4">
       <dl className="grid grid-cols-2 gap-x-6 gap-y-3 text-sm">
         <Field label="Tên gói thầu" value={ev.tenGoiThau} />
         <Field label="Dự án" value={ev.projectName} />
@@ -133,6 +136,82 @@ function InfoTab({ ev }: { ev: PeDetailBundle }) {
           <Field label="HĐ kế thừa" value={<a href={`/contracts/${ev.contractId}`} className="text-brand-600 hover:underline">✓ Xem HĐ</a>} />
         )}
       </dl>
+      {canCreateContract && (
+        <div className="rounded border border-emerald-200 bg-emerald-50 p-3">
+          <div className="flex items-center justify-between gap-3">
+            <div className="text-sm text-emerald-800">
+              ✓ Phiếu đã duyệt. Bấm để tạo HĐ mới kế thừa NCC + hạng mục.
+            </div>
+            <Button onClick={() => setCreateOpen(true)} className="gap-1.5 text-xs">
+              <Plus className="h-3.5 w-3.5" /> Tạo HĐ từ phiếu
+            </Button>
+          </div>
+        </div>
+      )}
+      {createOpen && <CreateContractDialog evaluation={ev} onClose={() => setCreateOpen(false)} />}
+    </div>
+  )
+}
+
+function CreateContractDialog({ evaluation, onClose }: { evaluation: PeDetailBundle; onClose: () => void }) {
+  const navigate = useNavigate()
+  const [form, setForm] = useState({
+    contractType: 1,
+    tenHopDong: evaluation.tenGoiThau,
+    bypassProcurementAndCCM: false,
+  })
+  const mut = useMutation({
+    mutationFn: async () =>
+      api.post<{ contractId: string }>(`/purchase-evaluations/${evaluation.id}/create-contract`, form),
+    onSuccess: res => {
+      toast.success('Đã tạo HĐ từ phiếu.')
+      navigate(`/contracts/${res.data.contractId}`)
+    },
+    onError: e => toast.error(getErrorMessage(e)),
+  })
+  const typeOptions = [
+    [1, 'HĐ Thầu phụ'],
+    [2, 'HĐ Giao khoán'],
+    [3, 'HĐ Nhà cung cấp'],
+    [4, 'HĐ Dịch vụ'],
+    [5, 'HĐ Mua bán'],
+    [6, 'HĐ Nguyên tắc NCC'],
+    [7, 'HĐ Nguyên tắc DV'],
+  ] as const
+  return (
+    <Dialog
+      open
+      onClose={onClose}
+      title="Tạo HĐ từ phiếu Duyệt NCC"
+      footer={<>
+        <Button variant="ghost" onClick={onClose}>Hủy</Button>
+        <Button onClick={() => mut.mutate()} disabled={mut.isPending}>Tạo</Button>
+      </>}
+    >
+      <div className="space-y-3">
+        <p className="text-sm text-slate-500">
+          NCC: <strong>{evaluation.selectedSupplierName}</strong> · Dự án: {evaluation.projectName}
+        </p>
+        <div>
+          <Label>Loại HĐ</Label>
+          <Select value={form.contractType} onChange={e => setForm({ ...form, contractType: Number(e.target.value) })}>
+            {typeOptions.map(([v, lbl]) => <option key={v} value={v}>{lbl}</option>)}
+          </Select>
+        </div>
+        <div>
+          <Label>Tên HĐ</Label>
+          <Input value={form.tenHopDong} onChange={e => setForm({ ...form, tenHopDong: e.target.value })} />
+        </div>
+        <label className="flex items-center gap-2 text-sm">
+          <input
+            type="checkbox"
+            checked={form.bypassProcurementAndCCM}
+            onChange={e => setForm({ ...form, bypassProcurementAndCCM: e.target.checked })}
+          />
+          Bypass CCM (áp dụng HĐ với Chủ đầu tư)
+        </label>
+      </div>
+    </Dialog>
   )
 }
 

fe-user/src/components/pe/PeDetailTabs.tsx

@@ -121,7 +121,10 @@ export function PeDetailTabs({
 
 // ===== Tab: Thông tin =====
 function InfoTab({ ev }: { ev: PeDetailBundle }) {
+  const canCreateContract = ev.phase === PurchaseEvaluationPhase.DaDuyet && !ev.contractId && ev.selectedSupplierId
+  const [createOpen, setCreateOpen] = useState(false)
   return (
+    <div className="space-y-4">
       <dl className="grid grid-cols-2 gap-x-6 gap-y-3 text-sm">
         <Field label="Tên gói thầu" value={ev.tenGoiThau} />
         <Field label="Dự án" value={ev.projectName} />
@@ -133,6 +136,82 @@ function InfoTab({ ev }: { ev: PeDetailBundle }) {
           <Field label="HĐ kế thừa" value={<a href={`/contracts/${ev.contractId}`} className="text-brand-600 hover:underline">✓ Xem HĐ</a>} />
         )}
       </dl>
+      {canCreateContract && (
+        <div className="rounded border border-emerald-200 bg-emerald-50 p-3">
+          <div className="flex items-center justify-between gap-3">
+            <div className="text-sm text-emerald-800">
+              ✓ Phiếu đã duyệt. Bấm để tạo HĐ mới kế thừa NCC + hạng mục.
+            </div>
+            <Button onClick={() => setCreateOpen(true)} className="gap-1.5 text-xs">
+              <Plus className="h-3.5 w-3.5" /> Tạo HĐ từ phiếu
+            </Button>
+          </div>
+        </div>
+      )}
+      {createOpen && <CreateContractDialog evaluation={ev} onClose={() => setCreateOpen(false)} />}
+    </div>
+  )
+}
+
+function CreateContractDialog({ evaluation, onClose }: { evaluation: PeDetailBundle; onClose: () => void }) {
+  const navigate = useNavigate()
+  const [form, setForm] = useState({
+    contractType: 1,
+    tenHopDong: evaluation.tenGoiThau,
+    bypassProcurementAndCCM: false,
+  })
+  const mut = useMutation({
+    mutationFn: async () =>
+      api.post<{ contractId: string }>(`/purchase-evaluations/${evaluation.id}/create-contract`, form),
+    onSuccess: res => {
+      toast.success('Đã tạo HĐ từ phiếu.')
+      navigate(`/contracts/${res.data.contractId}`)
+    },
+    onError: e => toast.error(getErrorMessage(e)),
+  })
+  const typeOptions = [
+    [1, 'HĐ Thầu phụ'],
+    [2, 'HĐ Giao khoán'],
+    [3, 'HĐ Nhà cung cấp'],
+    [4, 'HĐ Dịch vụ'],
+    [5, 'HĐ Mua bán'],
+    [6, 'HĐ Nguyên tắc NCC'],
+    [7, 'HĐ Nguyên tắc DV'],
+  ] as const
+  return (
+    <Dialog
+      open
+      onClose={onClose}
+      title="Tạo HĐ từ phiếu Duyệt NCC"
+      footer={<>
+        <Button variant="ghost" onClick={onClose}>Hủy</Button>
+        <Button onClick={() => mut.mutate()} disabled={mut.isPending}>Tạo</Button>
+      </>}
+    >
+      <div className="space-y-3">
+        <p className="text-sm text-slate-500">
+          NCC: <strong>{evaluation.selectedSupplierName}</strong> · Dự án: {evaluation.projectName}
+        </p>
+        <div>
+          <Label>Loại HĐ</Label>
+          <Select value={form.contractType} onChange={e => setForm({ ...form, contractType: Number(e.target.value) })}>
+            {typeOptions.map(([v, lbl]) => <option key={v} value={v}>{lbl}</option>)}
+          </Select>
+        </div>
+        <div>
+          <Label>Tên HĐ</Label>
+          <Input value={form.tenHopDong} onChange={e => setForm({ ...form, tenHopDong: e.target.value })} />
+        </div>
+        <label className="flex items-center gap-2 text-sm">
+          <input
+            type="checkbox"
+            checked={form.bypassProcurementAndCCM}
+            onChange={e => setForm({ ...form, bypassProcurementAndCCM: e.target.checked })}
+          />
+          Bypass CCM (áp dụng HĐ với Chủ đầu tư)
+        </label>
+      </div>
+    </Dialog>
   )
 }
 

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

@@ -149,7 +149,28 @@ public class PurchaseEvaluationsController(IMediator mediator) : ControllerBase
     [HttpGet("{id:guid}/changelogs")]
     public async Task<List<PurchaseEvaluationChangelogDto>> GetChangelogs(Guid id, CancellationToken ct)
         => await mediator.Send(new ListPurchaseEvaluationChangelogsQuery(id), ct);
+
+    // ========== Kế thừa HĐ ==========
+
+    // List phiếu đã DaDuyet chưa gen HĐ — dùng cho modal "Tạo HĐ từ phiếu"
+    [HttpGet("approved-pending-contract")]
+    public async Task<List<PurchaseEvaluationListItemDto>> ListApproved(CancellationToken ct)
+        => await mediator.Send(new ListApprovedPurchaseEvaluationsQuery(), ct);
+
+    [HttpPost("{id:guid}/create-contract")]
+    public async Task<ActionResult<object>> CreateContractFromEvaluation(
+        Guid id, [FromBody] CreateContractFromEvaluationBody body, CancellationToken ct)
+    {
+        var contractId = await mediator.Send(new CreateContractFromEvaluationCommand(
+            id, body.ContractType, body.TenHopDong, body.BypassProcurementAndCCM), ct);
+        return Ok(new { contractId });
     }
+}
+
+public record CreateContractFromEvaluationBody(
+    Domain.Contracts.ContractType ContractType,
+    string? TenHopDong,
+    bool BypassProcurementAndCCM = false);
 
 public record TransitionPeBody(PurchaseEvaluationPhase TargetPhase, ApprovalDecision Decision, string? Comment);
 

src/Backend/SolutionErp.Application/PurchaseEvaluations/CreateContractFromEvaluationFeatures.cs

@@ -0,0 +1,142 @@
+using FluentValidation;
+using MediatR;
+using Microsoft.EntityFrameworkCore;
+using SolutionErp.Application.Common.Exceptions;
+using SolutionErp.Application.Common.Interfaces;
+using SolutionErp.Application.Contracts.Services;
+using SolutionErp.Application.PurchaseEvaluations.Dtos;
+using SolutionErp.Domain.Contracts;
+using SolutionErp.Domain.PurchaseEvaluations;
+
+namespace SolutionErp.Application.PurchaseEvaluations;
+
+// Kế thừa từ phiếu Duyệt NCC đã DaDuyet → tạo HĐ Draft mới. Map cơ bản:
+// SupplierId = PE.SelectedSupplierId, ProjectId, DepartmentId, TenHopDong,
+// GiaTri (sum ThanhTienNganSach của details). ContractType do user chọn
+// (phiếu có thể gen HĐ ThauPhu/NhaCungCap/MuaBan... tùy gói thầu).
+//
+// KHÔNG copy Details per-type automatically — user điền riêng sau khi HĐ
+// gen, tránh mapping sai (PE detail schema ≠ 7 Contract detail schemas).
+// User có thể reference PE qua PE.ContractId để xem lại báo giá.
+public record CreateContractFromEvaluationCommand(
+    Guid PurchaseEvaluationId,
+    ContractType ContractType,
+    string? TenHopDong,
+    bool BypassProcurementAndCCM = false) : IRequest<Guid>;
+
+public class CreateContractFromEvaluationCommandValidator : AbstractValidator<CreateContractFromEvaluationCommand>
+{
+    public CreateContractFromEvaluationCommandValidator()
+    {
+        RuleFor(x => x.PurchaseEvaluationId).NotEmpty();
+        RuleFor(x => x.ContractType).IsInEnum();
+        RuleFor(x => x.TenHopDong).MaximumLength(500);
+    }
+}
+
+public class CreateContractFromEvaluationCommandHandler(
+    IApplicationDbContext db,
+    ICurrentUser currentUser,
+    IContractWorkflowService workflow,
+    IContractCodeGenerator codeGenerator) : IRequestHandler<CreateContractFromEvaluationCommand, Guid>
+{
+    public async Task<Guid> Handle(CreateContractFromEvaluationCommand request, CancellationToken ct)
+    {
+        var pe = await db.PurchaseEvaluations
+            .Include(p => p.Details)
+            .FirstOrDefaultAsync(p => p.Id == request.PurchaseEvaluationId, ct)
+            ?? throw new NotFoundException("PurchaseEvaluation", request.PurchaseEvaluationId);
+
+        if (pe.Phase != PurchaseEvaluationPhase.DaDuyet)
+            throw new ConflictException("Chỉ tạo HĐ từ phiếu đã duyệt xong (DaDuyet).");
+        if (pe.SelectedSupplierId is null)
+            throw new ConflictException("Phiếu chưa chọn NCC thắng — click 'Chọn NCC' trước.");
+        if (pe.ContractId is not null)
+            throw new ConflictException("Phiếu này đã tạo HĐ rồi.");
+
+        var supplier = await db.Suppliers.FirstOrDefaultAsync(s => s.Id == pe.SelectedSupplierId, ct)
+            ?? throw new NotFoundException("Supplier", pe.SelectedSupplierId.Value);
+        var project = await db.Projects.FirstOrDefaultAsync(p => p.Id == pe.ProjectId, ct)
+            ?? throw new NotFoundException("Project", pe.ProjectId);
+
+        var activeWfId = await db.WorkflowDefinitions.AsNoTracking()
+            .Where(w => w.ContractType == request.ContractType && w.IsActive)
+            .Select(w => (Guid?)w.Id)
+            .FirstOrDefaultAsync(ct);
+
+        var giaTri = pe.Details.Sum(d => d.ThanhTienNganSach);
+
+        var contract = new Contract
+        {
+            Type = request.ContractType,
+            Phase = ContractPhase.DangSoanThao,
+            SupplierId = pe.SelectedSupplierId.Value,
+            ProjectId = pe.ProjectId,
+            DepartmentId = pe.DepartmentId,
+            DrafterUserId = currentUser.UserId,
+            GiaTri = giaTri,
+            TenHopDong = request.TenHopDong ?? pe.TenGoiThau,
+            NoiDung = pe.MoTa,
+            BypassProcurementAndCCM = request.BypassProcurementAndCCM,
+            DraftData = pe.PaymentTerms,   // carry forward payment terms
+            WorkflowDefinitionId = activeWfId,
+            SlaDeadline = DateTime.UtcNow.Add(
+                workflow.GetPhaseSla(ContractPhase.DangSoanThao) ?? TimeSpan.FromDays(7)),
+        };
+        contract.MaHopDong = await codeGenerator.GenerateAsync(contract, project.Code, supplier.Code, ct);
+
+        db.Contracts.Add(contract);
+
+        // Changelog HĐ: note kế thừa từ phiếu
+        db.ContractChangelogs.Add(new ContractChangelog
+        {
+            ContractId = contract.Id,
+            EntityType = ChangelogEntityType.Contract,
+            Action = ChangelogAction.Insert,
+            PhaseAtChange = contract.Phase,
+            UserId = currentUser.UserId,
+            Summary = $"Tạo HĐ {contract.MaHopDong} từ phiếu {pe.MaPhieu ?? pe.TenGoiThau}",
+            ContextNote = $"Kế thừa từ PurchaseEvaluation {pe.Id}",
+        });
+
+        // Link 2 chiều
+        pe.ContractId = contract.Id;
+        db.PurchaseEvaluationChangelogs.Add(new PurchaseEvaluationChangelog
+        {
+            PurchaseEvaluationId = pe.Id,
+            EntityType = PurchaseEvaluationEntityType.Header,
+            Action = ChangelogAction.Update,
+            PhaseAtChange = pe.Phase,
+            UserId = currentUser.UserId,
+            Summary = $"Tạo HĐ {contract.MaHopDong} từ phiếu",
+            ContextNote = $"Contract {contract.Id}",
+        });
+
+        await db.SaveChangesAsync(ct);
+        return contract.Id;
+    }
+}
+
+// List phiếu đã duyệt chưa gen HĐ (cho FE modal picker trong ContractCreatePage)
+public record ListApprovedPurchaseEvaluationsQuery : IRequest<List<PurchaseEvaluationListItemDto>>;
+
+public class ListApprovedPurchaseEvaluationsQueryHandler(IApplicationDbContext db)
+    : IRequestHandler<ListApprovedPurchaseEvaluationsQuery, List<PurchaseEvaluationListItemDto>>
+{
+    public async Task<List<PurchaseEvaluationListItemDto>> Handle(
+        ListApprovedPurchaseEvaluationsQuery request, CancellationToken ct)
+    {
+        return await (
+            from e in db.PurchaseEvaluations.AsNoTracking()
+            join p in db.Projects.AsNoTracking() on e.ProjectId equals p.Id
+            join s in db.Suppliers.AsNoTracking() on e.SelectedSupplierId equals s.Id into sj
+            from s in sj.DefaultIfEmpty()
+            where e.Phase == PurchaseEvaluationPhase.DaDuyet && e.ContractId == null
+            orderby e.CreatedAt descending
+            select new PurchaseEvaluationListItemDto(
+                e.Id, e.MaPhieu, e.TenGoiThau, e.Type, e.Phase,
+                e.ProjectId, p.Name,
+                e.SelectedSupplierId, s != null ? s.Name : null,
+                e.ContractId, e.SlaDeadline, e.CreatedAt)).ToListAsync(ct);
+    }
+}