feat:创建挂单数据库，和迁移文件

lib/common/services/database/database.dart

@@ -10,6 +10,7 @@ part 'database.g.dart';
 const entities = <Type>[
   BroadcastEntity,
   OrderEntity,
+  OrderHoldBillEntity,
   CanteenSpuEntity,
   SupermarketSkuEntity,
   SupermarketSpuEntity,
@@ -35,11 +36,12 @@ const typeConverters = <Type>[
   BoolConverter,
 ];
 
-@Database(version: 2, entities: entities)
+@Database(version: 3, entities: entities)
 @TypeConverters(typeConverters)
 abstract class AppDatabase extends FloorDatabase {
   BroadcastDao get getBroadcastDao;
   OrderDao get getOrderDao;
+  OrderHoldBillDao get getOrderHoldBillDao;
   CanteenSpuDao get getCanteenSpuDao;
   SupermarketSkuDao get getSupermarketSkuDao;
   SupermarketSpuDao get getSupermarketSpuDao;
@@ -73,6 +75,77 @@ abstract class AppDatabase extends FloorDatabase {
               'ALTER TABLE supermarket_spu ADD COLUMN productNamePy TEXT');
         }
       }),
+      Migration(2, 3, (database) async {
+        // 如果表不存在则创建，存在则校验列并补齐缺失项
+        final tables = await database.rawQuery(
+          "SELECT name FROM sqlite_master WHERE type='table' AND name='order_hold_bill'",
+        );
+        if (tables.isEmpty) {
+          await database.execute('''
+            CREATE TABLE IF NOT EXISTS order_hold_bill (
+              id INTEGER PRIMARY KEY AUTOINCREMENT,
+              sysType TEXT NOT NULL,
+              orderListJson TEXT,
+              userJson TEXT,
+              orderJson TEXT,
+              createTime TEXT NOT NULL
+            )
+          ''');
+          await database.execute(
+            "CREATE INDEX IF NOT EXISTS idx_order_hold_bill_sysType ON order_hold_bill(sysType)",
+          );
+          await database.execute(
+            "CREATE INDEX IF NOT EXISTS idx_order_hold_bill_createTime ON order_hold_bill(createTime)",
+          );
+        } else {
+          final columns =
+              await database.rawQuery("PRAGMA table_info(order_hold_bill)");
+          bool hasSysType = false;
+          bool hasOrderListJson = false;
+          bool hasUserJson = false;
+          bool hasOrderJson = false;
+          bool hasCreateTime = false;
+          for (final c in columns) {
+            final name = c['name'];
+            if (name == 'sysType') hasSysType = true;
+            if (name == 'orderListJson') hasOrderListJson = true;
+            if (name == 'userJson') hasUserJson = true;
+            if (name == 'orderJson') hasOrderJson = true;
+            if (name == 'createTime') hasCreateTime = true;
+          }
+          if (!hasSysType) {
+            await database.execute(
+              'ALTER TABLE order_hold_bill ADD COLUMN sysType TEXT',
+            );
+          }
+          if (!hasOrderListJson) {
+            await database.execute(
+              'ALTER TABLE order_hold_bill ADD COLUMN orderListJson TEXT',
+            );
+          }
+          if (!hasUserJson) {
+            await database.execute(
+              'ALTER TABLE order_hold_bill ADD COLUMN userJson TEXT',
+            );
+          }
+          if (!hasOrderJson) {
+            await database.execute(
+              'ALTER TABLE order_hold_bill ADD COLUMN orderJson TEXT',
+            );
+          }
+          if (!hasCreateTime) {
+            await database.execute(
+              'ALTER TABLE order_hold_bill ADD COLUMN createTime TEXT',
+            );
+          }
+          await database.execute(
+            "CREATE INDEX IF NOT EXISTS idx_order_hold_bill_sysType ON order_hold_bill(sysType)",
+          );
+          await database.execute(
+            "CREATE INDEX IF NOT EXISTS idx_order_hold_bill_createTime ON order_hold_bill(createTime)",
+          );
+        }
+      }),
     ];
   }