feat: 4项需求实现

1. 供应商/客户编码自动生成（S001/C001...），新建表单隐藏编码字段，编辑保留
2. 财务管理"全部记录"移为第一个 tab
3. 入库单列表 tab 排除 pending 单据，提交后自动移入审核 tab
4. 出库单列表同上；出库表单按仓库+商品自动填最大可用库存数量

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/internal/handler/partner.go

@@ -1,6 +1,7 @@
 package handler
 
 import (
+	"fmt"
 	"net/http"
 	"strconv"
 
@@ -51,6 +52,18 @@ func (h *PartnerHandler) Create(c *gin.Context) {
 		return
 	}
 	p.ShopID = shopID
+	// 编码未提供时自动生成：供应商 S001/S002…，客户 C001/C002…
+	if p.Code == "" {
+		prefix := "S"
+		if p.Type == "customer" {
+			prefix = "C"
+		}
+		var count int64
+		h.db.Model(&model.Partner{}).
+			Where("shop_id = ? AND type = ? AND deleted_at IS NULL", shopID, p.Type).
+			Count(&count)
+		p.Code = fmt.Sprintf("%s%03d", prefix, count+1)
+	}
 	if err := h.db.Create(&p).Error; err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 		return

client/lib/screens/finance/finance_screen.dart

@@ -14,14 +14,14 @@ class FinanceScreen extends ConsumerWidget {
     return PageScaffold(
       title: '财务管理',
       tabs: const [
+        Tab(text: '全部记录'),
         Tab(text: '应付账款'),
         Tab(text: '应收账款'),
-        Tab(text: '全部记录'),
       ],
       tabViews: [
+        _FinanceTab(typeFilter: ''),
         _FinanceTab(typeFilter: 'payable'),
         _FinanceTab(typeFilter: 'receivable'),
-        _FinanceTab(typeFilter: ''),
       ],
     );
   }

client/lib/screens/partners/partners_screen.dart

@@ -416,13 +416,15 @@ class _PartnerFormDialogState extends ConsumerState<_PartnerFormDialog> {
               ),
               const SizedBox(height: 12),
               Row(children: [
-                Expanded(
+                if (isEdit) ...[
-                  child: TextFormField(
+                  Expanded(
-                    controller: _codeCtrl,
+                    child: TextFormField(
-                    decoration: const InputDecoration(labelText: '编码'),
+                      controller: _codeCtrl,
+                      decoration: const InputDecoration(labelText: '编码'),
+                    ),
                   ),
-                ),
+                  const SizedBox(width: 12),
-                const SizedBox(width: 12),
+                ],
                 Expanded(
                   child: TextFormField(
                     controller: _contactCtrl,

client/lib/screens/stock_in/stock_in_list_screen.dart

@@ -51,7 +51,7 @@ class _StockInListScreenState extends ConsumerState<StockInListScreen> {
       ],
       tabViews: [
         _buildListTab(filterStatus: 'pending', showNewButton: true),
-        _buildListTab(filterStatus: null, showNewButton: false),
+        _buildListTab(filterStatus: 'exclude_pending', showNewButton: false),
       ],
     );
   }
@@ -76,16 +76,19 @@ class _StockInListScreenState extends ConsumerState<StockInListScreen> {
         ),
       ),
       data: (result) {
-        final orders = filterStatus != null
+        final List<StockInOrder> orders;
-            ? result.data
+        if (filterStatus == 'pending') {
-                .where((o) => o.status == filterStatus)
+          orders = result.data.where((o) => o.status == 'pending').toList();
-                .toList()
+        } else if (filterStatus == 'exclude_pending') {
-            : result.data;
+          orders = result.data.where((o) => o.status != 'pending').toList();
+        } else {
+          orders = result.data;
+        }
         return _buildOrderTable(
           orders: orders,
-          totalCount: filterStatus != null ? orders.length : result.total,
+          totalCount: orders.length,
           page: result.page,
-          showStatusFilter: filterStatus == null,
+          showStatusFilter: filterStatus == 'exclude_pending',
           showNewButton: showNewButton,
         );
       },
@@ -611,7 +614,6 @@ class _StatusFilterDropdown extends StatelessWidget {
           items: [
             const DropdownMenuItem(value: '', child: Text('全部状态', style: TextStyle(fontSize: 13))),
             const DropdownMenuItem(value: 'draft', child: Text('草稿', style: TextStyle(fontSize: 13))),
-            const DropdownMenuItem(value: 'pending', child: Text('待审核', style: TextStyle(fontSize: 13))),
             const DropdownMenuItem(value: 'approved', child: Text('已审核', style: TextStyle(fontSize: 13))),
             const DropdownMenuItem(value: 'rejected', child: Text('已拒绝', style: TextStyle(fontSize: 13))),
           ],

client/lib/screens/stock_out/stock_out_form_screen.dart

@@ -4,6 +4,7 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
 import '../../core/theme/app_theme.dart';
 import '../../models/product.dart';
+import '../../providers/inventory_provider.dart';
 import '../../providers/partner_provider.dart';
 import '../../providers/product_provider.dart';
 import '../../providers/stock_out_provider.dart';
@@ -23,6 +24,8 @@ class _StockOutFormScreenState extends ConsumerState<StockOutFormScreen> {
   int? _partnerId;
   DateTime _orderDate = DateTime.now();
   bool _submitting = false;
+  // productId → available quantity in selected warehouse
+  Map<int, double> _inventoryMap = {};
 
   final List<_ItemRow> _items = [];
 
@@ -51,6 +54,19 @@ class _StockOutFormScreenState extends ConsumerState<StockOutFormScreen> {
     return total;
   }
 
+  Future<void> _loadInventory(int warehouseId) async {
+    try {
+      final result = await ref
+          .read(inventoryRepositoryProvider)
+          .listInventory(warehouseId: warehouseId, pageSize: 500);
+      setState(() {
+        _inventoryMap = {
+          for (final inv in result.data) inv.productId: inv.quantity
+        };
+      });
+    } catch (_) {}
+  }
+
   void _addItem() {
     setState(() => _items.add(_ItemRow()));
   }
@@ -219,8 +235,10 @@ class _StockOutFormScreenState extends ConsumerState<StockOutFormScreen> {
                                                   style: const TextStyle(
                                                       fontSize: 13))))
                                           .toList(),
-                                      onChanged: (v) => setState(
+                                      onChanged: (v) {
-                                          () => _warehouseId = v),
+                                        setState(() => _warehouseId = v);
+                                        if (v != null) _loadInventory(v);
+                                      },
                                       validator: (v) =>
                                           v == null ? '不能为空' : null,
                                       decoration: const InputDecoration(),
@@ -435,8 +453,8 @@ class _StockOutFormScreenState extends ConsumerState<StockOutFormScreen> {
               onChanged: (v) {
                 setState(() {
                   item.productId = v;
-                  // Auto-fill sale price if available
                   if (v != null) {
+                    // Auto-fill sale price
                     final found = result.data.firstWhere(
                         (p) => p.id == v,
                         orElse: () => Product(
@@ -445,6 +463,12 @@ class _StockOutFormScreenState extends ConsumerState<StockOutFormScreen> {
                       item.priceCtrl.text =
                           found.salePrice!.toStringAsFixed(2);
                     }
+                    // Auto-fill max available quantity from inventory
+                    final available = _inventoryMap[v] ?? 0;
+                    if (available > 0) {
+                      item.qtyCtrl.text =
+                          available.toStringAsFixed(0);
+                    }
                   }
                 });
               },

client/lib/screens/stock_out/stock_out_list_screen.dart

@@ -52,7 +52,7 @@ class _StockOutListScreenState extends ConsumerState<StockOutListScreen> {
       ],
       tabViews: [
         _buildListTab(filterStatus: 'pending', showNewButton: true),
-        _buildListTab(filterStatus: null, showNewButton: false),
+        _buildListTab(filterStatus: 'exclude_pending', showNewButton: false),
       ],
     );
   }
@@ -77,16 +77,19 @@ class _StockOutListScreenState extends ConsumerState<StockOutListScreen> {
         ),
       ),
       data: (result) {
-        final orders = filterStatus != null
+        final List<StockOutOrder> orders;
-            ? result.data
+        if (filterStatus == 'pending') {
-                .where((o) => o.status == filterStatus)
+          orders = result.data.where((o) => o.status == 'pending').toList();
-                .toList()
+        } else if (filterStatus == 'exclude_pending') {
-            : result.data;
+          orders = result.data.where((o) => o.status != 'pending').toList();
+        } else {
+          orders = result.data;
+        }
         return _buildOrderTable(
           orders: orders,
-          totalCount: filterStatus != null ? orders.length : result.total,
+          totalCount: orders.length,
           page: result.page,
-          showStatusFilter: filterStatus == null,
+          showStatusFilter: filterStatus == 'exclude_pending',
           showNewButton: showNewButton,
         );
       },
@@ -615,7 +618,6 @@ class _StatusFilterDropdown extends StatelessWidget {
           items: const [
             DropdownMenuItem(value: '', child: Text('全部状态', style: TextStyle(fontSize: 13))),
             DropdownMenuItem(value: 'draft', child: Text('草稿', style: TextStyle(fontSize: 13))),
-            DropdownMenuItem(value: 'pending', child: Text('待审核', style: TextStyle(fontSize: 13))),
             DropdownMenuItem(value: 'approved', child: Text('已审核', style: TextStyle(fontSize: 13))),
             DropdownMenuItem(value: 'rejected', child: Text('已拒绝', style: TextStyle(fontSize: 13))),
           ],