修复产量报表字段映射：添加前端兼容字段(date/quantity/runTime/cuttingTime/dataStatus)，产量列直接显示数值

frontend/src/views/production/ProductionPage.vue

@@ -45,7 +45,7 @@
       <el-table-column prop="date" label="日期"/>
       <el-table-column prop="machineName" label="机床"/>
       <el-table-column prop="programName" label="程序名" show-overflow-tooltip/>
-      <el-table-column label="产量" align="center"><template #default="{row}">{{row.dataStatus==='data_missing'?'-':row.quantity}}</template></el-table-column>
+      <el-table-column label="产量" align="center"><template #default="{row}">{{row.quantity ?? '-'}}</template></el-table-column>
       <el-table-column prop="runTime" label="运行时间" align="center"/>
       <el-table-column prop="cuttingTime" label="切削时间" align="center"/>
       <el-table-column label="日状态" align="center"><template #default="{row}"><el-tag :type="row.dataStatus==='normal'?'info':row.dataStatus==='offline'?'danger':'warning'" size="small">{{row.dataStatus==='normal'?'正常':row.dataStatus==='offline'?'离线':'缺失'}}</el-tag></template></el-table-column>

src/CncModels/Dto/Production/DailyProductionListItem.cs

@@ -18,5 +18,13 @@ namespace CncModels.Dto.Production
         public decimal? TotalCuttingTime { get; set; }
         public decimal? TotalCycleTime { get; set; }
         public int? WorkerId { get; set; }
+
+        // 前端兼容字段（序列化时填充）
+        public string date => ProductionDate.ToString("yyyy-MM-dd");
+        public decimal quantity => TotalQuantity;
+        public decimal? runTime => TotalRunTime;
+        public decimal? cuttingTime => TotalCuttingTime;
+        public string dataStatus => TotalQuantity > 0 ? "normal" : "data_missing";
+        public bool isAdjusted => false;
     }
 }