diff --git a/fe-admin/src/components/pe/PeDetailTabs.tsx b/fe-admin/src/components/pe/PeDetailTabs.tsx
index 668df84..c2a6775 100644
--- a/fe-admin/src/components/pe/PeDetailTabs.tsx
+++ b/fe-admin/src/components/pe/PeDetailTabs.tsx
@@ -567,7 +567,7 @@ function NccSelectorRow({ ev, readOnly }: { ev: PeDetailBundle; readOnly: boolea
   return (
     <div className="flex items-baseline gap-3 border-b border-dotted border-slate-200 pb-1.5">
       <span className="w-44 shrink-0 text-[12px] text-slate-500">a. NCC / TP được chọn</span>
-      <div className="min-w-0 flex-1">
+      <div className="relative min-w-0 flex-1">
         <Select
           value={ev.selectedSupplierId ?? ''}
           onChange={e => setWinner.mutate(e.target.value)}
@@ -581,6 +581,13 @@ function NccSelectorRow({ ev, readOnly }: { ev: PeDetailBundle; readOnly: boolea
             </option>
           ))}
         </Select>
+        {/* Loading spinner inline khi save có delay (user 2026-05-07) */}
+        {setWinner.isPending && (
+          <div className="mt-1 flex items-center gap-1.5 text-[11px] text-brand-600">
+            <div className="h-3 w-3 animate-spin rounded-full border-2 border-brand-300 border-t-brand-600" />
+            <span>Đang chọn NCC + sync cột giá Section 4…</span>
+          </div>
+        )}
         {ev.suppliers.length === 0 && (
           <p className="mt-1 text-[11px] text-amber-600">
             Thêm NCC ở Section 3 trước rồi mới chọn winner.
@@ -1185,14 +1192,24 @@ function ItemsTab({ ev, readOnly = false }: { ev: PeDetailBundle; readOnly?: boo
                     NS link · Δ
                   </th>
                 )}
-                {ev.suppliers.map(s => (
-                  <th key={s.id} className="border-r border-slate-200 px-2 py-2 text-right" title={s.displayName ?? undefined}>
-                    {/* User 2026-05-07: dùng tên NCC (master) thay vì displayName
-                        (custom name) để column header rõ ràng. displayName fallback
-                        sang title tooltip nếu có. */}
-                    {s.supplierName}
-                  </th>
-                ))}
+                {ev.suppliers.map(s => {
+                  // User 2026-05-07: dùng tên NCC (master) thay vì displayName.
+                  // Khi NCC là winner (selected ở Section 2.a) → column highlight
+                  // emerald để cell giá ăn theo màu xanh (visual trace winner).
+                  const isWinner = ev.selectedSupplierId === s.supplierId
+                  return (
+                    <th
+                      key={s.id}
+                      className={cn(
+                        'border-r border-slate-200 px-2 py-2 text-right',
+                        isWinner && 'bg-emerald-50 text-emerald-700',
+                      )}
+                      title={s.displayName ?? undefined}
+                    >
+                      {isWinner && '✓ '}{s.supplierName}
+                    </th>
+                  )
+                })}
                 {!readOnly && <th className="px-2 py-2"></th>}
               </tr>
             </thead>
@@ -1228,6 +1245,10 @@ function ItemsTab({ ev, readOnly = false }: { ev: PeDetailBundle; readOnly?: boo
                   })()}
                   {ev.suppliers.map(s => {
                     const q = quoteKey(d.id, s.id)
+                    // Winner NCC (selected ở Section 2.a) → cell ăn theo màu xanh
+                    // emerald (user 2026-05-07). isSelected per-quote checkbox bỏ
+                    // (đã consolidate winner ở Section 2.a NccSelectorRow).
+                    const isWinnerColumn = ev.selectedSupplierId === s.supplierId
                     return (
                       <td
                         key={s.id}
@@ -1235,7 +1256,7 @@ function ItemsTab({ ev, readOnly = false }: { ev: PeDetailBundle; readOnly?: boo
                         className={cn(
                           'border-r border-slate-200 px-2 py-2 text-right font-mono transition',
                           !readOnly && 'cursor-pointer hover:bg-brand-50',
-                          q?.isSelected && 'bg-emerald-50 font-semibold text-emerald-700',
+                          isWinnerColumn && 'bg-emerald-50 font-semibold text-emerald-700',
                         )}
                       >
                         {q ? fmtMoney(q.thanhTien) : <span className="text-slate-300">—</span>}
@@ -1379,11 +1400,13 @@ function QuoteDialog({
   onClose: () => void
 }) {
   const qc = useQueryClient()
+  // User 2026-05-07: Bỏ `isSelected` checkbox per-quote (consolidate winner
+  // selection ở Section 2.a NccSelectorRow). BE vẫn nhận isSelected nhưng FE
+  // luôn gửi `false` (existing.isSelected nếu có để giữ nguyên trạng thái cũ).
   const [form, setForm] = useState({
     bgVat: existing?.bgVat ?? 0,
     chuaVat: existing?.chuaVat ?? 0,
     thanhTien: existing?.thanhTien ?? 0,
-    isSelected: existing?.isSelected ?? false,
     note: existing?.note ?? '',
   })
 
@@ -1399,6 +1422,7 @@ function QuoteDialog({
         purchaseEvaluationDetailId: detailId,
         purchaseEvaluationSupplierId: supplierRowId,
         ...form,
+        isSelected: existing?.isSelected ?? false,  // giữ nguyên trạng thái cũ, không expose UI
       }),
     onSuccess: () => { toast.success('Đã lưu báo giá.'); qc.invalidateQueries({ queryKey: ['pe-detail', evaluationId] }); onClose() },
     onError: e => toast.error(getErrorMessage(e)),
@@ -1410,28 +1434,37 @@ function QuoteDialog({
     onError: e => toast.error(getErrorMessage(e)),
   })
 
+  const isSaving = mut.isPending || del.isPending
+
   return (
     <Dialog
       open
       onClose={onClose}
       title={`Báo giá — ${supplierName}`}
       footer={<>
-        {existing && <Button variant="danger" onClick={() => del.mutate()} disabled={del.isPending}>Xóa</Button>}
-        <Button variant="ghost" onClick={onClose}>Hủy</Button>
-        <Button onClick={() => mut.mutate()} disabled={mut.isPending}>Lưu</Button>
+        {existing && <Button variant="danger" onClick={() => del.mutate()} disabled={isSaving}>{del.isPending ? 'Đang xóa…' : 'Xóa'}</Button>}
+        <Button variant="ghost" onClick={onClose} disabled={isSaving}>Hủy</Button>
+        <Button onClick={() => mut.mutate()} disabled={isSaving}>{mut.isPending ? 'Đang lưu…' : 'Lưu'}</Button>
       </>}
     >
-      <div className="space-y-3">
+      {/* Loading overlay khi save có delay (user 2026-05-07) */}
+      <div className="relative space-y-3">
+        {isSaving && (
+          <div className="absolute inset-0 z-10 flex items-center justify-center rounded bg-white/70 backdrop-blur-sm">
+            <div className="flex items-center gap-2 rounded-lg border border-slate-200 bg-white px-4 py-2 shadow-md">
+              <div className="h-4 w-4 animate-spin rounded-full border-2 border-brand-300 border-t-brand-600" />
+              <span className="text-sm font-medium text-slate-700">
+                {mut.isPending ? 'Đang lưu báo giá…' : 'Đang xóa…'}
+              </span>
+            </div>
+          </div>
+        )}
         <p className="text-sm text-slate-500">Hạng mục: <strong>{itemName}</strong> · KL {khoiLuong}</p>
         <div className="grid grid-cols-3 gap-3">
           <div><Label>Đơn giá chưa VAT</Label><Input type="number" value={form.chuaVat} onChange={e => updateAndRecalc({ chuaVat: Number(e.target.value) })} /></div>
           <div><Label>Đơn giá có VAT</Label><Input type="number" value={form.bgVat} onChange={e => setForm({ ...form, bgVat: Number(e.target.value) })} /></div>
           <div><Label>Thành tiền (auto)</Label><Input type="number" value={form.thanhTien} onChange={e => setForm({ ...form, thanhTien: Number(e.target.value) })} /></div>
         </div>
-        <label className="flex items-center gap-2 text-sm">
-          <input type="checkbox" checked={form.isSelected} onChange={e => setForm({ ...form, isSelected: e.target.checked })} />
-          Chọn NCC này cho hạng mục
-        </label>
         <div><Label>Ghi chú</Label><Input value={form.note} onChange={e => setForm({ ...form, note: e.target.value })} /></div>
       </div>
     </Dialog>
diff --git a/fe-user/src/components/pe/PeDetailTabs.tsx b/fe-user/src/components/pe/PeDetailTabs.tsx
index 668df84..c2a6775 100644
--- a/fe-user/src/components/pe/PeDetailTabs.tsx
+++ b/fe-user/src/components/pe/PeDetailTabs.tsx
@@ -567,7 +567,7 @@ function NccSelectorRow({ ev, readOnly }: { ev: PeDetailBundle; readOnly: boolea
   return (
     <div className="flex items-baseline gap-3 border-b border-dotted border-slate-200 pb-1.5">
       <span className="w-44 shrink-0 text-[12px] text-slate-500">a. NCC / TP được chọn</span>
-      <div className="min-w-0 flex-1">
+      <div className="relative min-w-0 flex-1">
         <Select
           value={ev.selectedSupplierId ?? ''}
           onChange={e => setWinner.mutate(e.target.value)}
@@ -581,6 +581,13 @@ function NccSelectorRow({ ev, readOnly }: { ev: PeDetailBundle; readOnly: boolea
             </option>
           ))}
         </Select>
+        {/* Loading spinner inline khi save có delay (user 2026-05-07) */}
+        {setWinner.isPending && (
+          <div className="mt-1 flex items-center gap-1.5 text-[11px] text-brand-600">
+            <div className="h-3 w-3 animate-spin rounded-full border-2 border-brand-300 border-t-brand-600" />
+            <span>Đang chọn NCC + sync cột giá Section 4…</span>
+          </div>
+        )}
         {ev.suppliers.length === 0 && (
           <p className="mt-1 text-[11px] text-amber-600">
             Thêm NCC ở Section 3 trước rồi mới chọn winner.
@@ -1185,14 +1192,24 @@ function ItemsTab({ ev, readOnly = false }: { ev: PeDetailBundle; readOnly?: boo
                     NS link · Δ
                   </th>
                 )}
-                {ev.suppliers.map(s => (
-                  <th key={s.id} className="border-r border-slate-200 px-2 py-2 text-right" title={s.displayName ?? undefined}>
-                    {/* User 2026-05-07: dùng tên NCC (master) thay vì displayName
-                        (custom name) để column header rõ ràng. displayName fallback
-                        sang title tooltip nếu có. */}
-                    {s.supplierName}
-                  </th>
-                ))}
+                {ev.suppliers.map(s => {
+                  // User 2026-05-07: dùng tên NCC (master) thay vì displayName.
+                  // Khi NCC là winner (selected ở Section 2.a) → column highlight
+                  // emerald để cell giá ăn theo màu xanh (visual trace winner).
+                  const isWinner = ev.selectedSupplierId === s.supplierId
+                  return (
+                    <th
+                      key={s.id}
+                      className={cn(
+                        'border-r border-slate-200 px-2 py-2 text-right',
+                        isWinner && 'bg-emerald-50 text-emerald-700',
+                      )}
+                      title={s.displayName ?? undefined}
+                    >
+                      {isWinner && '✓ '}{s.supplierName}
+                    </th>
+                  )
+                })}
                 {!readOnly && <th className="px-2 py-2"></th>}
               </tr>
             </thead>
@@ -1228,6 +1245,10 @@ function ItemsTab({ ev, readOnly = false }: { ev: PeDetailBundle; readOnly?: boo
                   })()}
                   {ev.suppliers.map(s => {
                     const q = quoteKey(d.id, s.id)
+                    // Winner NCC (selected ở Section 2.a) → cell ăn theo màu xanh
+                    // emerald (user 2026-05-07). isSelected per-quote checkbox bỏ
+                    // (đã consolidate winner ở Section 2.a NccSelectorRow).
+                    const isWinnerColumn = ev.selectedSupplierId === s.supplierId
                     return (
                       <td
                         key={s.id}
@@ -1235,7 +1256,7 @@ function ItemsTab({ ev, readOnly = false }: { ev: PeDetailBundle; readOnly?: boo
                         className={cn(
                           'border-r border-slate-200 px-2 py-2 text-right font-mono transition',
                           !readOnly && 'cursor-pointer hover:bg-brand-50',
-                          q?.isSelected && 'bg-emerald-50 font-semibold text-emerald-700',
+                          isWinnerColumn && 'bg-emerald-50 font-semibold text-emerald-700',
                         )}
                       >
                         {q ? fmtMoney(q.thanhTien) : <span className="text-slate-300">—</span>}
@@ -1379,11 +1400,13 @@ function QuoteDialog({
   onClose: () => void
 }) {
   const qc = useQueryClient()
+  // User 2026-05-07: Bỏ `isSelected` checkbox per-quote (consolidate winner
+  // selection ở Section 2.a NccSelectorRow). BE vẫn nhận isSelected nhưng FE
+  // luôn gửi `false` (existing.isSelected nếu có để giữ nguyên trạng thái cũ).
   const [form, setForm] = useState({
     bgVat: existing?.bgVat ?? 0,
     chuaVat: existing?.chuaVat ?? 0,
     thanhTien: existing?.thanhTien ?? 0,
-    isSelected: existing?.isSelected ?? false,
     note: existing?.note ?? '',
   })
 
@@ -1399,6 +1422,7 @@ function QuoteDialog({
         purchaseEvaluationDetailId: detailId,
         purchaseEvaluationSupplierId: supplierRowId,
         ...form,
+        isSelected: existing?.isSelected ?? false,  // giữ nguyên trạng thái cũ, không expose UI
       }),
     onSuccess: () => { toast.success('Đã lưu báo giá.'); qc.invalidateQueries({ queryKey: ['pe-detail', evaluationId] }); onClose() },
     onError: e => toast.error(getErrorMessage(e)),
@@ -1410,28 +1434,37 @@ function QuoteDialog({
     onError: e => toast.error(getErrorMessage(e)),
   })
 
+  const isSaving = mut.isPending || del.isPending
+
   return (
     <Dialog
       open
       onClose={onClose}
       title={`Báo giá — ${supplierName}`}
       footer={<>
-        {existing && <Button variant="danger" onClick={() => del.mutate()} disabled={del.isPending}>Xóa</Button>}
-        <Button variant="ghost" onClick={onClose}>Hủy</Button>
-        <Button onClick={() => mut.mutate()} disabled={mut.isPending}>Lưu</Button>
+        {existing && <Button variant="danger" onClick={() => del.mutate()} disabled={isSaving}>{del.isPending ? 'Đang xóa…' : 'Xóa'}</Button>}
+        <Button variant="ghost" onClick={onClose} disabled={isSaving}>Hủy</Button>
+        <Button onClick={() => mut.mutate()} disabled={isSaving}>{mut.isPending ? 'Đang lưu…' : 'Lưu'}</Button>
       </>}
     >
-      <div className="space-y-3">
+      {/* Loading overlay khi save có delay (user 2026-05-07) */}
+      <div className="relative space-y-3">
+        {isSaving && (
+          <div className="absolute inset-0 z-10 flex items-center justify-center rounded bg-white/70 backdrop-blur-sm">
+            <div className="flex items-center gap-2 rounded-lg border border-slate-200 bg-white px-4 py-2 shadow-md">
+              <div className="h-4 w-4 animate-spin rounded-full border-2 border-brand-300 border-t-brand-600" />
+              <span className="text-sm font-medium text-slate-700">
+                {mut.isPending ? 'Đang lưu báo giá…' : 'Đang xóa…'}
+              </span>
+            </div>
+          </div>
+        )}
         <p className="text-sm text-slate-500">Hạng mục: <strong>{itemName}</strong> · KL {khoiLuong}</p>
         <div className="grid grid-cols-3 gap-3">
           <div><Label>Đơn giá chưa VAT</Label><Input type="number" value={form.chuaVat} onChange={e => updateAndRecalc({ chuaVat: Number(e.target.value) })} /></div>
           <div><Label>Đơn giá có VAT</Label><Input type="number" value={form.bgVat} onChange={e => setForm({ ...form, bgVat: Number(e.target.value) })} /></div>
           <div><Label>Thành tiền (auto)</Label><Input type="number" value={form.thanhTien} onChange={e => setForm({ ...form, thanhTien: Number(e.target.value) })} /></div>
         </div>
-        <label className="flex items-center gap-2 text-sm">
-          <input type="checkbox" checked={form.isSelected} onChange={e => setForm({ ...form, isSelected: e.target.checked })} />
-          Chọn NCC này cho hạng mục
-        </label>
         <div><Label>Ghi chú</Label><Input value={form.note} onChange={e => setForm({ ...form, note: e.target.value })} /></div>
       </div>
     </Dialog>