fix(admin): contract preview, package audit detail, empty packages, winery status

Allow HQ to save stores with zero packages, preview contract images/PDFs, inspect package audit images/content, and show gray 无需打款 when winery payable is 0.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/dukang-api/src/modules/settlement/settlement.service.ts

@@ -1708,6 +1708,9 @@ export class SettlementService {
     const bill = await this.prisma.wineryBill.findUnique({ where: { id } });
     if (!bill) throw new NotFoundException('酒厂对账单不存在');
     if (bill.status !== 'UNPAID') throw new BadRequestException('仅未打款账单可确认打款');
+    if (Number(bill.wineryAmount) === 0) {
+      throw new BadRequestException('应付为 0，无需打款');
+    }
     const updated = await this.prisma.wineryBill.update({
       where: { id },
       data: { status: 'PAID', paidAt: new Date() },
@@ -1749,11 +1752,17 @@ export class SettlementService {
       '配送类型',
       '实付金额',
       '酒厂比例',
-      '酒厂应付',
+      '应付',
       '支付时间',
       '账单状态',
     ].join(',');
     const rows: string[] = [];
+    const statusLabel = (b: { status: string; wineryAmount: Prisma.Decimal | number }) => {
+      if (Number(b.wineryAmount) === 0) return '无需打款';
+      if (b.status === 'PAID') return '已打款';
+      if (b.status === 'UNPAID') return '未打款';
+      return b.status;
+    };
     for (const b of bills) {
       if (b.items.length === 0) {
         rows.push(
@@ -1766,7 +1775,7 @@ export class SettlementService {
             Number(b.wineryRate),
             Number(b.wineryAmount),
             '',
-            b.status,
+            statusLabel(b),
           ].join(','),
         );
         continue;
@@ -1782,7 +1791,7 @@ export class SettlementService {
             Number(b.wineryRate),
             Number(item.wineryAmount),
             item.paidAt.toISOString().slice(0, 19).replace('T', ' '),
-            b.status,
+            statusLabel(b),
           ].join(','),
         );
       }
@@ -1798,7 +1807,15 @@ export class SettlementService {
     month?: number;
   }): Prisma.WineryBillWhereInput {
     const where: Prisma.WineryBillWhereInput = {};
-    if (query.status === 'UNPAID' || query.status === 'PAID') where.status = query.status;
+    if (query.status === 'NO_PAYMENT_NEEDED') {
+      where.wineryAmount = 0;
+    } else if (query.status === 'UNPAID') {
+      where.status = 'UNPAID';
+      where.wineryAmount = { gt: 0 };
+    } else if (query.status === 'PAID') {
+      where.status = 'PAID';
+      where.wineryAmount = { gt: 0 };
+    }
     if (query.year && query.month) {
       const start = new Date(query.year, query.month - 1, 1);
       const end = new Date(query.year, query.month, 0, 23, 59, 59, 999);